gtk2_ardour/editor_drag.cc

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <stdint.h>
  25 #include <algorithm>
  26
  27 #include "pbd/memento_command.h"
  28 #include "pbd/basename.h"
  29 #include "pbd/stateful_diff_command.h"
  30
  31 #include "gtkmm2ext/utils.h"
  32
  33 #include "ardour/audioengine.h"
  34 #include "ardour/audioregion.h"
  35 #include "ardour/audio_track.h"
  36 #include "ardour/dB.h"
  37 #include "ardour/midi_region.h"
  38 #include "ardour/midi_track.h"
  39 #include "ardour/operations.h"
  40 #include "ardour/region_factory.h"
  41 #include "ardour/session.h"
  42
  43 #include "canvas/canvas.h"
  44 #include "canvas/scroll_group.h"
  45
  46 #include "editor.h"
  47 #include "i18n.h"
  48 #include "keyboard.h"
  49 #include "audio_region_view.h"
  50 #include "automation_region_view.h"
  51 #include "midi_region_view.h"
  52 #include "ardour_ui.h"
  53 #include "gui_thread.h"
  54 #include "control_point.h"
  55 #include "region_gain_line.h"
  56 #include "editor_drag.h"
  57 #include "audio_time_axis.h"
  58 #include "midi_time_axis.h"
  59 #include "selection.h"
  60 #include "midi_selection.h"
  61 #include "automation_time_axis.h"
  62 #include "debug.h"
  63 #include "editor_cursors.h"
  64 #include "mouse_cursors.h"
  65 #include "note_base.h"
  66 #include "patch_change.h"
  67 #include "ui_config.h"
  68 #include "verbose_cursor.h"
  69
  70 using namespace std;
  71 using namespace ARDOUR;
  72 using namespace PBD;
  73 using namespace Gtk;
  74 using namespace Gtkmm2ext;
  75 using namespace Editing;
  76 using namespace ArdourCanvas;
  77
  78 using Gtkmm2ext::Keyboard;
  79
  80 double ControlPointDrag::_zero_gain_fraction = -1.0;
  81
  82 DragManager::DragManager (Editor* e)
  83         : _editor (e)
  84         , _ending (false)
  85         , _current_pointer_x (0.0)
  86         , _current_pointer_y (0.0)
  87         , _current_pointer_frame (0)
  88         , _old_follow_playhead (false)
  89 {
  90 }
  91
  92 DragManager::~DragManager ()
  93 {
  94         abort ();
  95 }
  96
  97 /** Call abort for each active drag */
  98 void
  99 DragManager::abort ()
 100 {
 101         _ending = true;
 102
 103         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 104                 (*i)->abort ();
 105                 delete *i;
 106         }
 107
 108         if (!_drags.empty ()) {
 109                 _editor->set_follow_playhead (_old_follow_playhead, false);
 110         }
 111
 112         _drags.clear ();
 113         _editor->abort_reversible_command();
 114
 115         _ending = false;
 116 }
 117
 118 void
 119 DragManager::add (Drag* d)
 120 {
 121         d->set_manager (this);
 122         _drags.push_back (d);
 123 }
 124
 125 void
 126 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
 127 {
 128         d->set_manager (this);
 129         _drags.push_back (d);
 130         start_grab (e, c);
 131 }
 132
 133 void
 134 DragManager::start_grab (GdkEvent* e, Gdk::Cursor* c)
 135 {
 136         /* Prevent follow playhead during the drag to be nice to the user */
 137         _old_follow_playhead = _editor->follow_playhead ();
 138         _editor->set_follow_playhead (false);
 139
 140         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 141
 142         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 143                 (*i)->start_grab (e, c);
 144         }
 145 }
 146
 147 /** Call end_grab for each active drag.
 148  *  @return true if any drag reported movement having occurred.
 149  */
 150 bool
 151 DragManager::end_grab (GdkEvent* e)
 152 {
 153         _ending = true;
 154
 155         bool r = false;
 156         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 157                 bool const t = (*i)->end_grab (e);
 158                 if (t) {
 159                         r = true;
 160                 }
 161                 delete *i;
 162         }
 163
 164         _drags.clear ();
 165
 166         _ending = false;
 167
 168         _editor->set_follow_playhead (_old_follow_playhead, false);
 169
 170         return r;
 171 }
 172
 173 void
 174 DragManager::mark_double_click ()
 175 {
 176         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 177                 (*i)->set_double_click (true);
 178         }
 179 }
 180
 181 bool
 182 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 183 {
 184         bool r = false;
 185
 186         /* calling this implies that we expect the event to have canvas
 187          * coordinates
 188          *
 189          * Can we guarantee that this is true?
 190          */
 191
 192         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 193
 194         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 195                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 196                 /* run all handlers; return true if at least one of them
 197                    returns true (indicating that the event has been handled).
 198                 */
 199                 if (t) {
 200                         r = true;
 201                 }
 202
 203         }
 204
 205         return r;
 206 }
 207
 208 bool
 209 DragManager::have_item (ArdourCanvas::Item* i) const
 210 {
 211         list<Drag*>::const_iterator j = _drags.begin ();
 212         while (j != _drags.end() && (*j)->item () != i) {
 213                 ++j;
 214         }
 215
 216         return j != _drags.end ();
 217 }
 218
 219 Drag::Drag (Editor* e, ArdourCanvas::Item* i, bool trackview_only)
 220         : _editor (e)
 221         , _drags (0)
 222         , _item (i)
 223         , _pointer_frame_offset (0)
 224         , _x_constrained (false)
 225         , _y_constrained (false)
 226         , _was_rolling (false)
 227         , _trackview_only (trackview_only)
 228         , _move_threshold_passed (false)
 229         , _starting_point_passed (false)
 230         , _initially_vertical (false)
 231         , _was_double_click (false)
 232         , _grab_x (0.0)
 233         , _grab_y (0.0)
 234         , _last_pointer_x (0.0)
 235         , _last_pointer_y (0.0)
 236         , _raw_grab_frame (0)
 237         , _grab_frame (0)
 238         , _last_pointer_frame (0)
 239         , _snap_delta (0)
 240 {
 241
 242 }
 243
 244 void
 245 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t /*time*/)
 246 {
 247         _item->ungrab ();
 248         _item = new_item;
 249
 250         if (!_cursor_ctx) {
 251                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 252         } else {
 253                 _cursor_ctx->change (cursor);
 254         }
 255
 256         _item->grab ();
 257 }
 258
 259 void
 260 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 261 {
 262
 263         /* we set up x/y dragging constraints on first move */
 264
 265         _raw_grab_frame = _editor->canvas_event_sample (event, &_grab_x, &_grab_y);
 266
 267         setup_pointer_frame_offset ();
 268         _grab_frame = adjusted_frame (_raw_grab_frame, event);
 269         _last_pointer_frame = _grab_frame;
 270         _last_pointer_x = _grab_x;
 271
 272         if (_trackview_only) {
 273                 _grab_y = _grab_y - _editor->get_trackview_group()->canvas_origin().y;
 274         }
 275
 276         _last_pointer_y = _grab_y;
 277
 278         _item->grab ();
 279
 280         if (!_editor->cursors()->is_invalid (cursor)) {
 281                 /* CAIROCANVAS need a variant here that passes *cursor */
 282                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 283         }
 284
 285         if (_editor->session() && _editor->session()->transport_rolling()) {
 286                 _was_rolling = true;
 287         } else {
 288                 _was_rolling = false;
 289         }
 290
 291         switch (_editor->snap_type()) {
 292         case SnapToRegionStart:
 293         case SnapToRegionEnd:
 294         case SnapToRegionSync:
 295         case SnapToRegionBoundary:
 296                 _editor->build_region_boundary_cache ();
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 /** Call to end a drag `successfully'.  Ungrabs item and calls
 304  *  subclass' finished() method.
 305  *
 306  *  @param event GDK event, or 0.
 307  *  @return true if some movement occurred, otherwise false.
 308  */
 309 bool
 310 Drag::end_grab (GdkEvent* event)
 311 {
 312         _editor->stop_canvas_autoscroll ();
 313
 314         _item->ungrab ();
 315
 316         finished (event, _move_threshold_passed);
 317
 318         _editor->verbose_cursor()->hide ();
 319         _cursor_ctx.reset();
 320
 321         return _move_threshold_passed;
 322 }
 323
 324 framepos_t
 325 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 326 {
 327         framepos_t pos = 0;
 328
 329         if (f > _pointer_frame_offset) {
 330                 pos = f - _pointer_frame_offset;
 331         }
 332
 333         if (snap) {
 334                 _editor->snap_to_with_modifier (pos, event);
 335         }
 336
 337         return pos;
 338 }
 339
 340 framepos_t
 341 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 342 {
 343         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 344 }
 345
 346 frameoffset_t
 347 Drag::snap_delta (guint state) const
 348 {
 349         if (ArdourKeyboard::indicates_snap_delta (state)) {
 350                 return _snap_delta;
 351         }
 352
 353         return 0;
 354 }
 355
 356 double
 357 Drag::current_pointer_x() const
 358 {
 359         return _drags->current_pointer_x ();
 360 }
 361
 362 double
 363 Drag::current_pointer_y () const
 364 {
 365         if (!_trackview_only) {
 366                 return _drags->current_pointer_y ();
 367         }
 368
 369         return _drags->current_pointer_y () - _editor->get_trackview_group()->canvas_origin().y;
 370 }
 371
 372 void
 373 Drag::setup_snap_delta (framepos_t pos)
 374 {
 375         framepos_t temp = pos;
 376         _editor->snap_to (temp, ARDOUR::RoundNearest, false, true);
 377         _snap_delta = temp - pos;
 378 }
 379
 380 bool
 381 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 382 {
 383         /* check to see if we have moved in any way that matters since the last motion event */
 384         if (_move_threshold_passed &&
 385             (!x_movement_matters() || _last_pointer_x == current_pointer_x ()) &&
 386             (!y_movement_matters() || _last_pointer_y == current_pointer_y ()) ) {
 387                 return false;
 388         }
 389
 390         pair<framecnt_t, int> const threshold = move_threshold ();
 391
 392         bool const old_move_threshold_passed = _move_threshold_passed;
 393
 394         if (!_move_threshold_passed) {
 395
 396                 bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
 397                 bool const yp = (::fabs ((current_pointer_y () - _grab_y)) >= threshold.second);
 398
 399                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 400         }
 401
 402         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 403
 404                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 405
 406                         if (old_move_threshold_passed != _move_threshold_passed) {
 407
 408                                 /* just changed */
 409
 410                                 if (fabs (current_pointer_y() - _grab_y) > fabs (current_pointer_x() - _grab_x)) {
 411                                         _initially_vertical = true;
 412                                 } else {
 413                                         _initially_vertical = false;
 414                                 }
 415                                 /** check constraints for this drag.
 416                                  *  Note that the current convention is to use "contains" for
 417                                  *  key modifiers during motion and "equals" when initiating a drag.
 418                                  *  In this case we haven't moved yet, so "equals" applies here.
 419                                  */
 420                                 if (Config->get_edit_mode() != Lock) {
 421                                         if (event->motion.state & Gdk::BUTTON2_MASK) {
 422                                                 // if dragging with button2, the motion is x constrained, with constraint modifier it is y constrained
 423                                                 if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 424                                                         _x_constrained = false;
 425                                                         _y_constrained = true;
 426                                                 } else {
 427                                                         _x_constrained = true;
 428                                                         _y_constrained = false;
 429                                                 }
 430                                         } else if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 431                                                 // if dragging normally, the motion is constrained to the first direction of movement.
 432                                                 if (_initially_vertical) {
 433                                                         _x_constrained = true;
 434                                                         _y_constrained = false;
 435                                                 } else {
 436                                                         _x_constrained = false;
 437                                                         _y_constrained = true;
 438                                                 }
 439                                         }
 440                                 } else {
 441                                         if (event->button.state & Gdk::BUTTON2_MASK) {
 442                                                 _x_constrained = false;
 443                                         } else {
 444                                                 _x_constrained = true;
 445                                         }
 446                                         _y_constrained = false;
 447                                 }
 448                         }
 449
 450                         if (!from_autoscroll) {
 451                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll (), false);
 452                         }
 453
 454                         if (!_editor->autoscroll_active() || from_autoscroll) {
 455
 456
 457                                 bool first_move = (_move_threshold_passed != old_move_threshold_passed) || from_autoscroll;
 458
 459                                 motion (event, first_move && !_starting_point_passed);
 460
 461                                 if (first_move && !_starting_point_passed) {
 462                                         _starting_point_passed = true;
 463                                 }
 464
 465                                 _last_pointer_x = _drags->current_pointer_x ();
 466                                 _last_pointer_y = current_pointer_y ();
 467                                 _last_pointer_frame = adjusted_current_frame (event, false);
 468                         }
 469
 470                         return true;
 471                 }
 472         }
 473
 474         return false;
 475 }
 476
 477 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 478 void
 479 Drag::abort ()
 480 {
 481         if (_item) {
 482                 _item->ungrab ();
 483         }
 484
 485         aborted (_move_threshold_passed);
 486
 487         _editor->stop_canvas_autoscroll ();
 488         _editor->verbose_cursor()->hide ();
 489 }
 490
 491 void
 492 Drag::show_verbose_cursor_time (framepos_t frame)
 493 {
 494         _editor->verbose_cursor()->set_time (frame);
 495         _editor->verbose_cursor()->show ();
 496 }
 497
 498 void
 499 Drag::show_verbose_cursor_duration (framepos_t start, framepos_t end, double /*xoffset*/)
 500 {
 501         _editor->verbose_cursor()->set_duration (start, end);
 502         _editor->verbose_cursor()->show ();
 503 }
 504
 505 void
 506 Drag::show_verbose_cursor_text (string const & text)
 507 {
 508         _editor->verbose_cursor()->set (text);
 509         _editor->verbose_cursor()->show ();
 510 }
 511
 512 boost::shared_ptr<Region>
 513 Drag::add_midi_region (MidiTimeAxisView* view, bool commit)
 514 {
 515         if (_editor->session()) {
 516                 const TempoMap& map (_editor->session()->tempo_map());
 517                 framecnt_t pos = grab_frame();
 518                 /* not that the frame rate used here can be affected by pull up/down which
 519                    might be wrong.
 520                 */
 521                 framecnt_t len = map.frame_at_beat (map.beat_at_frame (pos) + 1.0) - pos;
 522                 return view->add_region (grab_frame(), len, commit);
 523         }
 524
 525         return boost::shared_ptr<Region>();
 526 }
 527
 528 struct EditorOrderTimeAxisViewSorter {
 529         bool operator() (TimeAxisView* a, TimeAxisView* b) {
 530                 RouteTimeAxisView* ra = dynamic_cast<RouteTimeAxisView*> (a);
 531                 RouteTimeAxisView* rb = dynamic_cast<RouteTimeAxisView*> (b);
 532                 assert (ra && rb);
 533                 return ra->route()->order_key () < rb->route()->order_key ();
 534         }
 535 };
 536
 537 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 538         : Drag (e, i)
 539         , _primary (p)
 540         , _ntracks (0)
 541 {
 542         _editor->visible_order_range (&_visible_y_low, &_visible_y_high);
 543
 544         /* Make a list of tracks to refer to during the drag; we include hidden tracks,
 545            as some of the regions we are dragging may be on such tracks.
 546         */
 547
 548         TrackViewList track_views = _editor->track_views;
 549         track_views.sort (EditorOrderTimeAxisViewSorter ());
 550
 551         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 552                 _time_axis_views.push_back (*i);
 553
 554                 TimeAxisView::Children children_list = (*i)->get_child_list ();
 555                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 556                         _time_axis_views.push_back (j->get());
 557                 }
 558         }
 559
 560         /* the list of views can be empty at this point if this is a region list-insert drag
 561          */
 562
 563         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 564                 _views.push_back (DraggingView (*i, this, &(*i)->get_time_axis_view()));
 565         }
 566
 567         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), boost::bind (&RegionDrag::region_going_away, this, _1), gui_context());
 568 }
 569
 570 void
 571 RegionDrag::region_going_away (RegionView* v)
 572 {
 573         list<DraggingView>::iterator i = _views.begin ();
 574         while (i != _views.end() && i->view != v) {
 575                 ++i;
 576         }
 577
 578         if (i != _views.end()) {
 579                 _views.erase (i);
 580         }
 581 }
 582
 583 /** Given a TimeAxisView, return the index of it into the _time_axis_views vector,
 584  *  or -1 if it is not found.
 585  */
 586 int
 587 RegionDrag::find_time_axis_view (TimeAxisView* t) const
 588 {
 589         int i = 0;
 590         int const N = _time_axis_views.size ();
 591         while (i < N && _time_axis_views[i] != t) {
 592                 ++i;
 593         }
 594
 595         if (_time_axis_views[i] != t) {
 596                 return -1;
 597         }
 598
 599         return i;
 600 }
 601
 602 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 603         : RegionDrag (e, i, p, v)
 604         , _brushing (b)
 605         , _ignore_video_lock (false)
 606         , _total_x_delta (0)
 607         , _last_pointer_time_axis_view (0)
 608         , _last_pointer_layer (0)
 609         , _ndropzone (0)
 610         , _pdropzone (0)
 611         , _ddropzone (0)
 612 {
 613         DEBUG_TRACE (DEBUG::Drags, "New RegionMotionDrag\n");
 614 }
 615
 616 void
 617 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 618 {
 619         Drag::start_grab (event, cursor);
 620         setup_snap_delta (_last_frame_position);
 621
 622         show_verbose_cursor_time (_last_frame_position);
 623
 624         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (current_pointer_y ());
 625         if (tv.first) {
 626                 _last_pointer_time_axis_view = find_time_axis_view (tv.first);
 627                 assert(_last_pointer_time_axis_view >= 0);
 628                 _last_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
 629         }
 630
 631         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
 632                 _ignore_video_lock = true;
 633         }
 634
 635         if (_brushing) {
 636                 /* cross track dragging seems broken here. disabled for now. */
 637                 _y_constrained = true;
 638         }
 639 }
 640
 641 double
 642 RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
 643 {
 644         /* compute the amount of pointer motion in frames, and where
 645            the region would be if we moved it by that much.
 646         */
 647         *pending_region_position = adjusted_frame (_drags->current_pointer_frame (), event, false);
 648
 649         framepos_t sync_frame;
 650         framecnt_t sync_offset;
 651         int32_t sync_dir;
 652
 653         sync_offset = _primary->region()->sync_offset (sync_dir);
 654
 655         /* we don't handle a sync point that lies before zero.
 656          */
 657         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 658
 659                 framecnt_t const sd = snap_delta (event->button.state);
 660                 sync_frame = *pending_region_position + (sync_dir * sync_offset) + sd;
 661
 662                 _editor->snap_to_with_modifier (sync_frame, event);
 663
 664                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame) - sd;
 665
 666         } else {
 667                 *pending_region_position = _last_frame_position;
 668         }
 669
 670         if (*pending_region_position > max_framepos - _primary->region()->length()) {
 671                 *pending_region_position = _last_frame_position;
 672         }
 673
 674         double dx = 0;
 675
 676         bool const x_move_allowed = !_x_constrained;
 677
 678         if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
 679
 680                 /* x movement since last time (in pixels) */
 681                 dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->samples_per_pixel;
 682
 683                 /* total x movement */
 684                 framecnt_t total_dx = *pending_region_position;
 685                 if (regions_came_from_canvas()) {
 686                         total_dx = total_dx - grab_frame ();
 687                 }
 688
 689                 /* check that no regions have gone off the start of the session */
 690                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 691                         if ((i->view->region()->position() + total_dx) < 0) {
 692                                 dx = 0;
 693                                 *pending_region_position = _last_frame_position;
 694                                 break;
 695                         }
 696                 }
 697
 698         }
 699
 700         return dx;
 701 }
 702
 703 int
 704 RegionDrag::apply_track_delta (const int start, const int delta, const int skip, const bool distance_only) const
 705 {
 706         if (delta == 0) {
 707                 return start;
 708         }
 709
 710         const int tavsize  = _time_axis_views.size();
 711         const int dt = delta > 0 ? +1 : -1;
 712         int current  = start;
 713         int target   = start + delta - skip;
 714
 715         assert (current < 0 || current >= tavsize || !_time_axis_views[current]->hidden());
 716         assert (skip == 0 || (skip < 0 && delta < 0) || (skip > 0 && delta > 0));
 717
 718         while (current >= 0 && current != target) {
 719                 current += dt;
 720                 if (current < 0 && dt < 0) {
 721                         break;
 722                 }
 723                 if (current >= tavsize && dt > 0) {
 724                         break;
 725                 }
 726                 if (current < 0 || current >= tavsize) {
 727                         continue;
 728                 }
 729
 730                 RouteTimeAxisView const * rtav = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[current]);
 731                 if (_time_axis_views[current]->hidden() || !rtav || !rtav->is_track()) {
 732                         target += dt;
 733                 }
 734
 735                 if (distance_only && current == start + delta) {
 736                         break;
 737                 }
 738         }
 739         return target;
 740 }
 741
 742 bool
 743 RegionMotionDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
 744 {
 745         if (_y_constrained) {
 746                 return false;
 747         }
 748
 749         const int tavsize  = _time_axis_views.size();
 750         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 751                 int n = apply_track_delta (i->time_axis_view, delta_track, skip_invisible);
 752                 assert (n < 0 || n >= tavsize || !_time_axis_views[n]->hidden());
 753
 754                 if (i->time_axis_view < 0 || i->time_axis_view >= tavsize) {
 755                         /* already in the drop zone */
 756                         if (delta_track >= 0) {
 757                                 /* downward motion - OK if others are still not in the dropzone */
 758                                 continue;
 759                         }
 760
 761                 }
 762
 763                 if (n < 0) {
 764                         /* off the top */
 765                         return false;
 766                 } else if (n >= tavsize) {
 767                         /* downward motion into drop zone. That's fine. */
 768                         continue;
 769                 }
 770
 771                 RouteTimeAxisView const * to = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[n]);
 772                 if (to == 0 || to->hidden() || !to->is_track() || to->track()->data_type() != i->view->region()->data_type()) {
 773                         /* not a track, or the wrong type */
 774                         return false;
 775                 }
 776
 777                 double const l = i->layer + delta_layer;
 778
 779                 /* Note that we allow layer to be up to 0.5 below zero, as this is used by `Expanded'
 780                    mode to allow the user to place a region below another on layer 0.
 781                 */
 782                 if (delta_track == 0 && (l < -0.5 || l >= int (to->view()->layers()))) {
 783                         /* Off the top or bottom layer; note that we only refuse if the track hasn't changed.
 784                            If it has, the layers will be munged later anyway, so it's ok.
 785                         */
 786                         return false;
 787                 }
 788         }
 789
 790         /* all regions being dragged are ok with this change */
 791         return true;
 792 }
 793
 794 struct DraggingViewSorter {
 795         bool operator() (const DraggingView& a, const DraggingView& b) {
 796                 return a.time_axis_view < b.time_axis_view;
 797         }
 798 };
 799
 800 void
 801 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 802 {
 803         double delta_layer = 0;
 804         int delta_time_axis_view = 0;
 805         int current_pointer_time_axis_view = -1;
 806
 807         assert (!_views.empty ());
 808
 809         /* Note: time axis views in this method are often expressed as an index into the _time_axis_views vector */
 810
 811         /* Find the TimeAxisView that the pointer is now over */
 812         const double cur_y = current_pointer_y ();
 813         pair<TimeAxisView*, double> const r = _editor->trackview_by_y_position (cur_y);
 814         TimeAxisView* tv = r.first;
 815
 816         if (!tv && cur_y < 0) {
 817                 /* above trackview area, autoscroll hasn't moved us since last time, nothing to do */
 818                 return;
 819         }
 820
 821         /* find drop-zone y-position */
 822         Coord last_track_bottom_edge;
 823         last_track_bottom_edge = 0;
 824         for (std::vector<TimeAxisView*>::reverse_iterator t = _time_axis_views.rbegin(); t != _time_axis_views.rend(); ++t) {
 825                 if (!(*t)->hidden()) {
 826                         last_track_bottom_edge = (*t)->canvas_display()->canvas_origin ().y + (*t)->effective_height();
 827                         break;
 828                 }
 829         }
 830
 831         if (tv && tv->view()) {
 832                 /* the mouse is over a track */
 833                 double layer = r.second;
 834
 835                 if (first_move && tv->view()->layer_display() == Stacked) {
 836                         tv->view()->set_layer_display (Expanded);
 837                 }
 838
 839                 /* Here's the current pointer position in terms of time axis view and layer */
 840                 current_pointer_time_axis_view = find_time_axis_view (tv);
 841                 assert(current_pointer_time_axis_view >= 0);
 842
 843                 double const current_pointer_layer = tv->layer_display() == Overlaid ? 0 : layer;
 844
 845                 /* Work out the change in y */
 846
 847                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
 848                 if (!rtv || !rtv->is_track()) {
 849                         /* ignore busses early on. we can't move any regions on them */
 850                 } else if (_last_pointer_time_axis_view < 0) {
 851                         /* Was in the drop-zone, now over a track.
 852                          * Hence it must be an upward move (from the bottom)
 853                          *
 854                          * track_index is still -1, so delta must be set to
 855                          * move up the correct number of tracks from the bottom.
 856                          *
 857                          * This is necessary because steps may be skipped if
 858                          * the bottom-most track is not a valid target and/or
 859                          * if there are hidden tracks at the bottom.
 860                          * Hence the initial offset (_ddropzone) as well as the
 861                          * last valid pointer position (_pdropzone) need to be
 862                          * taken into account.
 863                          */
 864                         delta_time_axis_view = current_pointer_time_axis_view - _time_axis_views.size () + _ddropzone - _pdropzone;
 865                 } else {
 866                         delta_time_axis_view = current_pointer_time_axis_view - _last_pointer_time_axis_view;
 867                 }
 868
 869                 /* TODO needs adjustment per DraggingView,
 870                  *
 871                  * e.g. select one region on the top-layer of a track
 872                  * and one region which is at the bottom-layer of another track
 873                  * drag both.
 874                  *
 875                  * Indicated drop-zones and layering is wrong.
 876                  * and may infer additional layers on the target-track
 877                  * (depending how many layers the original track had).
 878                  *
 879                  * Or select two regions (different layers) on a same track,
 880                  * move across a non-layer track.. -> layering info is lost.
 881                  * on drop either of the regions may be on top.
 882                  *
 883                  * Proposed solution: screw it :) well,
 884                  *   don't use delta_layer, use an absolute value
 885                  *   1) remember DraggingView's layer  as float 0..1  [current layer / all layers of source]
 886                  *   2) calculate current mouse pos, y-pos inside track divided by height of mouse-over track.
 887                  *   3) iterate over all DraggingView, find the one that is over the track with most layers
 888                  *   4) proportionally scale layer to layers available on target
 889                  */
 890                 delta_layer = current_pointer_layer - _last_pointer_layer;
 891
 892         }
 893         /* for automation lanes, there is a TimeAxisView but no ->view()
 894          * if (!tv) -> dropzone
 895          */
 896         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view >= 0) {
 897                 /* Moving into the drop-zone.. */
 898                 delta_time_axis_view = _time_axis_views.size () - _last_pointer_time_axis_view;
 899                 /* delta_time_axis_view may not be sufficient to move into the DZ
 900                  * the mouse may enter it, but it may not be a valid move due to
 901                  * constraints.
 902                  *
 903                  * -> remember the delta needed to move into the dropzone
 904                  */
 905                 _ddropzone = delta_time_axis_view;
 906                 /* ..but subtract hidden tracks (or routes) at the bottom.
 907                  * we silently move mover them
 908                  */
 909                 _ddropzone -= apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 910                               - _time_axis_views.size();
 911         }
 912         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view < 0) {
 913                 /* move around inside the zone.
 914                  * This allows to move further down until all regions are in the zone.
 915                  */
 916                 const double ptr_y = cur_y + _editor->get_trackview_group()->canvas_origin().y;
 917                 assert(ptr_y >= last_track_bottom_edge);
 918                 assert(_ddropzone > 0);
 919
 920                 /* calculate mouse position in 'tracks' below last track. */
 921                 const double dzi_h = TimeAxisView::preset_height (HeightNormal);
 922                 uint32_t dzpos = _ddropzone + floor((1 + ptr_y - last_track_bottom_edge) / dzi_h);
 923
 924                 if (dzpos > _pdropzone && _ndropzone < _ntracks) {
 925                         // move further down
 926                         delta_time_axis_view =  dzpos - _pdropzone;
 927                 } else if (dzpos < _pdropzone && _ndropzone > 0) {
 928                         // move up inside the DZ
 929                         delta_time_axis_view =  dzpos - _pdropzone;
 930                 }
 931         }
 932
 933         /* Work out the change in x */
 934         framepos_t pending_region_position;
 935         double const x_delta = compute_x_delta (event, &pending_region_position);
 936         _last_frame_position = pending_region_position;
 937
 938         /* calculate hidden tracks in current y-axis delta */
 939         int delta_skip = 0;
 940         if (_last_pointer_time_axis_view < 0 && _pdropzone > 0) {
 941                 /* The mouse is more than one track below the dropzone.
 942                  * distance calculation is not needed (and would not work, either
 943                  * because the dropzone is "packed").
 944                  *
 945                  * Except when [partially] moving regions out of dropzone in a large step.
 946                  * (the mouse may or may not remain in the DZ)
 947                  * Hidden tracks at the bottom of the TAV need to be skipped.
 948                  *
 949                  * This also handles the case if the mouse entered the DZ
 950                  * in a large step (exessive delta), either due to fast-movement,
 951                  * autoscroll, laggy UI. _ddropzone copensates for that (see "move into dz" above)
 952                  */
 953                 if (delta_time_axis_view < 0 && (int)_ddropzone - delta_time_axis_view >= (int)_pdropzone) {
 954                         const int dt = delta_time_axis_view + (int)_pdropzone - (int)_ddropzone;
 955                         assert(dt <= 0);
 956                         delta_skip = apply_track_delta(_time_axis_views.size(), dt, 0, true)
 957                                 -_time_axis_views.size() - dt;
 958                 }
 959         }
 960         else if (_last_pointer_time_axis_view < 0) {
 961                 /* Moving out of the zone. Check for hidden tracks at the bottom. */
 962                 delta_skip = apply_track_delta(_time_axis_views.size(), delta_time_axis_view, 0, true)
 963                              -_time_axis_views.size() - delta_time_axis_view;
 964         } else {
 965                 /* calculate hidden tracks that are skipped by the pointer movement */
 966                 delta_skip = apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 967                              - _last_pointer_time_axis_view
 968                              - delta_time_axis_view;
 969         }
 970
 971         /* Verify change in y */
 972         if (!y_movement_allowed (delta_time_axis_view, delta_layer, delta_skip)) {
 973                 /* this y movement is not allowed, so do no y movement this time */
 974                 delta_time_axis_view = 0;
 975                 delta_layer = 0;
 976                 delta_skip = 0;
 977         }
 978
 979         if (x_delta == 0 && (tv && tv->view() && delta_time_axis_view == 0) && delta_layer == 0 && !first_move) {
 980                 /* haven't reached next snap point, and we're not switching
 981                    trackviews nor layers. nothing to do.
 982                 */
 983                 return;
 984         }
 985
 986         typedef map<boost::shared_ptr<Playlist>, double> PlaylistDropzoneMap;
 987         PlaylistDropzoneMap playlist_dropzone_map;
 988         _ndropzone = 0; // number of elements currently in the dropzone
 989
 990         if (first_move) {
 991                 /* sort views by time_axis.
 992                  * This retains track order in the dropzone, regardless
 993                  * of actual selection order
 994                  */
 995                 _views.sort (DraggingViewSorter());
 996
 997                 /* count number of distinct tracks of all regions
 998                  * being dragged, used for dropzone.
 999                  */
1000                 int prev_track = -1;
1001                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1002                         if (i->time_axis_view != prev_track) {
1003                                 prev_track = i->time_axis_view;
1004                                 ++_ntracks;
1005                         }
1006                 }
1007 #ifndef NDEBUG
1008                 int spread =
1009                         _views.back().time_axis_view -
1010                         _views.front().time_axis_view;
1011
1012                 spread -= apply_track_delta (_views.front().time_axis_view, spread, 0, true)
1013                           -  _views.back().time_axis_view;
1014
1015                 printf("Dragging region(s) from %d different track(s), max dist: %d\n", _ntracks, spread);
1016 #endif
1017         }
1018
1019         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1020
1021                 RegionView* rv = i->view;
1022                 double y_delta;
1023
1024                 y_delta = 0;
1025
1026                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1027                         continue;
1028                 }
1029
1030                 if (first_move) {
1031                         rv->drag_start ();
1032
1033                         /* reparent the regionview into a group above all
1034                          * others
1035                          */
1036
1037                         ArdourCanvas::Item* rvg = rv->get_canvas_group();
1038                         Duple rv_canvas_offset = rvg->parent()->canvas_origin ();
1039                         Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
1040                         rv->get_canvas_group()->reparent (_editor->_drag_motion_group);
1041                         /* move the item so that it continues to appear at the
1042                            same location now that its parent has changed.
1043                            */
1044                         rvg->move (rv_canvas_offset - dmg_canvas_offset);
1045                 }
1046
1047                 /* If we have moved tracks, we'll fudge the layer delta so that the
1048                    region gets moved back onto layer 0 on its new track; this avoids
1049                    confusion when dragging regions from non-zero layers onto different
1050                    tracks.
1051                 */
1052                 double this_delta_layer = delta_layer;
1053                 if (delta_time_axis_view != 0) {
1054                         this_delta_layer = - i->layer;
1055                 }
1056
1057                 int this_delta_time_axis_view = apply_track_delta(i->time_axis_view, delta_time_axis_view, delta_skip) - i->time_axis_view;
1058
1059                 int track_index = i->time_axis_view + this_delta_time_axis_view;
1060                 assert(track_index >= 0);
1061
1062                 if (track_index < 0 || track_index >= (int) _time_axis_views.size()) {
1063                         /* Track is in the Dropzone */
1064
1065                         i->time_axis_view = track_index;
1066                         assert(i->time_axis_view >= (int) _time_axis_views.size());
1067                         if (cur_y >= 0) {
1068
1069                                 double yposition = 0;
1070                                 PlaylistDropzoneMap::iterator pdz = playlist_dropzone_map.find (i->view->region()->playlist());
1071                                 rv->set_height (TimeAxisView::preset_height (HeightNormal));
1072                                 ++_ndropzone;
1073
1074                                 /* store index of each new playlist as a negative count, starting at -1 */
1075
1076                                 if (pdz == playlist_dropzone_map.end()) {
1077                                         /* compute where this new track (which doesn't exist yet) will live
1078                                            on the y-axis.
1079                                         */
1080                                         yposition = last_track_bottom_edge; /* where to place the top edge of the regionview */
1081
1082                                         /* How high is this region view ? */
1083
1084                                         boost::optional<ArdourCanvas::Rect> obbox = rv->get_canvas_group()->bounding_box ();
1085                                         ArdourCanvas::Rect bbox;
1086
1087                                         if (obbox) {
1088                                                 bbox = obbox.get ();
1089                                         }
1090
1091                                         last_track_bottom_edge += bbox.height();
1092
1093                                         playlist_dropzone_map.insert (make_pair (i->view->region()->playlist(), yposition));
1094
1095                                 } else {
1096                                         yposition = pdz->second;
1097                                 }
1098
1099                                 /* values are zero or negative, hence the use of min() */
1100                                 y_delta = yposition - rv->get_canvas_group()->canvas_origin().y;
1101                         }
1102
1103                 } else {
1104
1105                         /* The TimeAxisView that this region is now over */
1106                         TimeAxisView* current_tv = _time_axis_views[track_index];
1107
1108                         /* Ensure it is moved from stacked -> expanded if appropriate */
1109                         if (current_tv->view()->layer_display() == Stacked) {
1110                                 current_tv->view()->set_layer_display (Expanded);
1111                         }
1112
1113                         /* We're only allowed to go -ve in layer on Expanded views */
1114                         if (current_tv->view()->layer_display() != Expanded && (i->layer + this_delta_layer) < 0) {
1115                                 this_delta_layer = - i->layer;
1116                         }
1117
1118                         /* Set height */
1119                         rv->set_height (current_tv->view()->child_height ());
1120
1121                         /* Update show/hidden status as the region view may have come from a hidden track,
1122                            or have moved to one.
1123                         */
1124                         if (current_tv->hidden ()) {
1125                                 rv->get_canvas_group()->hide ();
1126                         } else {
1127                                 rv->get_canvas_group()->show ();
1128                         }
1129
1130                         /* Update the DraggingView */
1131                         i->time_axis_view = track_index;
1132                         i->layer += this_delta_layer;
1133
1134                         if (_brushing) {
1135                                 _editor->mouse_brush_insert_region (rv, pending_region_position);
1136                         } else {
1137                                 Duple track_origin;
1138
1139                                 /* Get the y coordinate of the top of the track that this region is now over */
1140                                 track_origin = current_tv->canvas_display()->item_to_canvas (track_origin);
1141
1142                                 /* And adjust for the layer that it should be on */
1143                                 StreamView* cv = current_tv->view ();
1144                                 switch (cv->layer_display ()) {
1145                                 case Overlaid:
1146                                         break;
1147                                 case Stacked:
1148                                         track_origin.y += (cv->layers() - i->layer - 1) * cv->child_height ();
1149                                         break;
1150                                 case Expanded:
1151                                         track_origin.y += (cv->layers() - i->layer - 0.5) * 2 * cv->child_height ();
1152                                         break;
1153                                 }
1154
1155                                 /* need to get the parent of the regionview
1156                                  * canvas group and get its position in
1157                                  * equivalent coordinate space as the trackview
1158                                  * we are now dragging over.
1159                                  */
1160
1161                                 y_delta = track_origin.y - rv->get_canvas_group()->canvas_origin().y;
1162
1163                         }
1164                 }
1165
1166                 /* Now move the region view */
1167                 rv->move (x_delta, y_delta);
1168
1169         } /* foreach region */
1170
1171         _total_x_delta += x_delta;
1172
1173         if (x_delta != 0 && !_brushing) {
1174                 show_verbose_cursor_time (_last_frame_position);
1175         }
1176
1177         /* keep track of pointer movement */
1178         if (tv) {
1179                 /* the pointer is currently over a time axis view */
1180
1181                 if (_last_pointer_time_axis_view < 0) {
1182                         /* last motion event was not over a time axis view
1183                          * or last y-movement out of the dropzone was not valid
1184                          */
1185                         int dtz = 0;
1186                         if (delta_time_axis_view < 0) {
1187                                 /* in the drop zone, moving up */
1188
1189                                 /* _pdropzone is the last known pointer y-axis position inside the DZ.
1190                                  * We do not use negative _last_pointer_time_axis_view because
1191                                  * the dropzone is "packed" (the actual track offset is ignored)
1192                                  *
1193                                  * As opposed to the actual number
1194                                  * of elements in the dropzone (_ndropzone)
1195                                  * _pdropzone is not constrained. This is necessary
1196                                  * to allow moving multiple regions with y-distance
1197                                  * into the DZ.
1198                                  *
1199                                  * There can be 0 elements in the dropzone,
1200                                  * even though the drag-pointer is inside the DZ.
1201                                  *
1202                                  * example:
1203                                  * [ Audio-track, Midi-track, Audio-track, DZ ]
1204                                  * move regions from both audio tracks at the same time into the
1205                                  * DZ by grabbing the region in the bottom track.
1206                                  */
1207                                 assert(current_pointer_time_axis_view >= 0);
1208                                 dtz = std::min((int)_pdropzone, (int)_ddropzone - delta_time_axis_view);
1209                                 _pdropzone -= dtz;
1210                         }
1211
1212                         /* only move out of the zone if the movement is OK */
1213                         if (_pdropzone == 0 && delta_time_axis_view != 0) {
1214                                 assert(delta_time_axis_view < 0);
1215                                 _last_pointer_time_axis_view = current_pointer_time_axis_view;
1216                                 /* if all logic and maths are correct, there is no need to assign the 'current' pointer.
1217                                  * the current position can be calculated as follows:
1218                                  */
1219                                 // a well placed oofus attack can still throw this off.
1220                                 // likley auto-scroll related, printf() debugging may tell, commented out for now.
1221                                 //assert (current_pointer_time_axis_view == _time_axis_views.size() - dtz + _ddropzone + delta_time_axis_view);
1222                         }
1223                 } else {
1224                         /* last motion event was also over a time axis view */
1225                         _last_pointer_time_axis_view += delta_time_axis_view;
1226                         assert(_last_pointer_time_axis_view >= 0);
1227                 }
1228
1229         } else {
1230
1231                 /* the pointer is not over a time axis view */
1232                 assert ((delta_time_axis_view > 0) || (((int)_pdropzone) >= (delta_skip - delta_time_axis_view)));
1233                 _pdropzone += delta_time_axis_view - delta_skip;
1234                 _last_pointer_time_axis_view = -1; // <0 : we're in the zone, value does not matter.
1235         }
1236
1237         _last_pointer_layer += delta_layer;
1238 }
1239
1240 void
1241 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
1242 {
1243         if (_copy && first_move) {
1244                 if (_x_constrained && !_brushing) {
1245                         _editor->begin_reversible_command (Operations::fixed_time_region_copy);
1246                 } else if (!_brushing) {
1247                         _editor->begin_reversible_command (Operations::region_copy);
1248                 } else if (_brushing) {
1249                         _editor->begin_reversible_command (Operations::drag_region_brush);
1250                 }
1251                 /* duplicate the regionview(s) and region(s) */
1252
1253                 list<DraggingView> new_regionviews;
1254
1255                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1256
1257                         RegionView* rv = i->view;
1258                         AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1259                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1260
1261                         const boost::shared_ptr<const Region> original = rv->region();
1262                         boost::shared_ptr<Region> region_copy = RegionFactory::create (original, true);
1263                         region_copy->set_position (original->position());
1264                         /* need to set this so that the drop zone code can work. This doesn't
1265                            actually put the region into the playlist, but just sets a weak pointer
1266                            to it.
1267                         */
1268                         region_copy->set_playlist (original->playlist());
1269
1270                         RegionView* nrv;
1271                         if (arv) {
1272                                 boost::shared_ptr<AudioRegion> audioregion_copy
1273                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1274
1275                                 nrv = new AudioRegionView (*arv, audioregion_copy);
1276                         } else if (mrv) {
1277                                 boost::shared_ptr<MidiRegion> midiregion_copy
1278                                         = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1279                                 nrv = new MidiRegionView (*mrv, midiregion_copy);
1280                         } else {
1281                                 continue;
1282                         }
1283
1284                         nrv->get_canvas_group()->show ();
1285                         new_regionviews.push_back (DraggingView (nrv, this, i->initial_time_axis_view));
1286
1287                         /* swap _primary to the copy */
1288
1289                         if (rv == _primary) {
1290                                 _primary = nrv;
1291                         }
1292
1293                         /* ..and deselect the one we copied */
1294
1295                         rv->set_selected (false);
1296                 }
1297
1298                 if (!new_regionviews.empty()) {
1299
1300                         /* reflect the fact that we are dragging the copies */
1301
1302                         _views = new_regionviews;
1303
1304                         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1305                 }
1306
1307         } else if (!_copy && first_move) {
1308                 if (_x_constrained && !_brushing) {
1309                         _editor->begin_reversible_command (_("fixed time region drag"));
1310                 } else if (!_brushing) {
1311                         _editor->begin_reversible_command (Operations::region_drag);
1312                 } else if (_brushing) {
1313                         _editor->begin_reversible_command (Operations::drag_region_brush);
1314                 }
1315         }
1316         RegionMotionDrag::motion (event, first_move);
1317 }
1318
1319 void
1320 RegionMotionDrag::finished (GdkEvent *, bool)
1321 {
1322         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1323                 if (!(*i)->view()) {
1324                         continue;
1325                 }
1326
1327                 if ((*i)->view()->layer_display() == Expanded) {
1328                         (*i)->view()->set_layer_display (Stacked);
1329                 }
1330         }
1331 }
1332
1333 void
1334 RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
1335 {
1336         RegionMotionDrag::finished (ev, movement_occurred);
1337
1338         if (!movement_occurred) {
1339
1340                 /* just a click */
1341
1342                 if (was_double_click() && !_views.empty()) {
1343                         DraggingView dv = _views.front();
1344                         dv.view->show_region_editor ();
1345
1346                 }
1347
1348                 return;
1349         }
1350
1351         assert (!_views.empty ());
1352
1353         /* We might have hidden region views so that they weren't visible during the drag
1354            (when they have been reparented).  Now everything can be shown again, as region
1355            views are back in their track parent groups.
1356         */
1357         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1358                 i->view->get_canvas_group()->show ();
1359         }
1360
1361         bool const changed_position = (_last_frame_position != _primary->region()->position());
1362         bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
1363         framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
1364
1365         if (_copy) {
1366
1367                 finished_copy (
1368                         changed_position,
1369                         changed_tracks,
1370                         drag_delta
1371                         );
1372
1373         } else {
1374
1375                 finished_no_copy (
1376                         changed_position,
1377                         changed_tracks,
1378                         drag_delta
1379                         );
1380
1381         }
1382
1383         _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
1384 }
1385
1386 RouteTimeAxisView*
1387 RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region, TimeAxisView* original)
1388 {
1389         /* Add a new track of the correct type, and return the RouteTimeAxisView that is created to display the
1390            new track.
1391          */
1392
1393         try {
1394                 if (boost::dynamic_pointer_cast<AudioRegion> (region)) {
1395                         list<boost::shared_ptr<AudioTrack> > audio_tracks;
1396                         uint32_t output_chan = region->n_channels();
1397                         if ((Config->get_output_auto_connect() & AutoConnectMaster) && _editor->session()->master_out()) {
1398                                 output_chan =  _editor->session()->master_out()->n_inputs().n_audio();
1399                         }
1400                         audio_tracks = _editor->session()->new_audio_track (region->n_channels(), output_chan, ARDOUR::Normal, 0, 1, region->name());
1401                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (audio_tracks.front());
1402                         if (rtav) {
1403                                 rtav->set_height (original->current_height());
1404                         }
1405                         return rtav;
1406                 } else {
1407                         ChanCount one_midi_port (DataType::MIDI, 1);
1408                         list<boost::shared_ptr<MidiTrack> > midi_tracks;
1409                         midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port, boost::shared_ptr<ARDOUR::PluginInfo>(), ARDOUR::Normal, 0, 1, region->name());
1410                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (midi_tracks.front());
1411                         if (rtav) {
1412                                 rtav->set_height (original->current_height());
1413                         }
1414                         return rtav;
1415                 }
1416         } catch (...) {
1417                 error << _("Could not create new track after region placed in the drop zone") << endmsg;
1418                 return 0;
1419         }
1420 }
1421
1422 void
1423 RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta)
1424 {
1425         RegionSelection new_views;
1426         PlaylistSet modified_playlists;
1427         RouteTimeAxisView* new_time_axis_view = 0;
1428
1429         if (_brushing) {
1430                 /* all changes were made during motion event handlers */
1431
1432                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1433                         delete i->view;
1434                 }
1435
1436                 _editor->commit_reversible_command ();
1437                 return;
1438         }
1439
1440         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1441         PlaylistMapping playlist_mapping;
1442
1443         /* insert the regions into their new playlists */
1444         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1445
1446                 RouteTimeAxisView* dest_rtv = 0;
1447
1448                 if (i->view->region()->locked() || (i->view->region()->video_locked() && !_ignore_video_lock)) {
1449                         continue;
1450                 }
1451
1452                 framepos_t where;
1453
1454                 if (changed_position && !_x_constrained) {
1455                         where = i->view->region()->position() - drag_delta;
1456                 } else {
1457                         where = i->view->region()->position();
1458                 }
1459
1460                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1461                         /* dragged to drop zone */
1462
1463                         PlaylistMapping::iterator pm;
1464
1465                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1466                                 /* first region from this original playlist: create a new track */
1467                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1468                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1469                                 dest_rtv = new_time_axis_view;
1470                         } else {
1471                                 /* we already created a new track for regions from this playlist, use it */
1472                                 dest_rtv = pm->second;
1473                         }
1474                 } else {
1475                         /* destination time axis view is the one we dragged to */
1476                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1477                 }
1478
1479                 if (dest_rtv != 0) {
1480                         RegionView* new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, modified_playlists);
1481                         if (new_view != 0) {
1482                                 new_views.push_back (new_view);
1483                         }
1484                 }
1485
1486                 /* Delete the copy of the view that was used for dragging. Need to play safe with the iterator
1487                    since deletion will automagically remove it from _views, thus invalidating i as an iterator.
1488                  */
1489
1490                 list<DraggingView>::const_iterator next = i;
1491                 ++next;
1492                 delete i->view;
1493                 i = next;
1494         }
1495
1496         /* If we've created new regions either by copying or moving
1497            to a new track, we want to replace the old selection with the new ones
1498         */
1499
1500         if (new_views.size() > 0) {
1501                 _editor->selection->set (new_views);
1502         }
1503
1504         /* write commands for the accumulated diffs for all our modified playlists */
1505         add_stateful_diff_commands_for_playlists (modified_playlists);
1506
1507         _editor->commit_reversible_command ();
1508 }
1509
1510 void
1511 RegionMoveDrag::finished_no_copy (
1512         bool const changed_position,
1513         bool const changed_tracks,
1514         framecnt_t const drag_delta
1515         )
1516 {
1517         RegionSelection new_views;
1518         PlaylistSet modified_playlists;
1519         PlaylistSet frozen_playlists;
1520         set<RouteTimeAxisView*> views_to_update;
1521         RouteTimeAxisView* new_time_axis_view = 0;
1522
1523         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1524         PlaylistMapping playlist_mapping;
1525
1526         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
1527
1528                 RegionView* rv = i->view;
1529                 RouteTimeAxisView* dest_rtv = 0;
1530
1531                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1532                         ++i;
1533                         continue;
1534                 }
1535
1536                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1537                         /* dragged to drop zone */
1538
1539                         PlaylistMapping::iterator pm;
1540
1541                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1542                                 /* first region from this original playlist: create a new track */
1543                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1544                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1545                                 dest_rtv = new_time_axis_view;
1546                         } else {
1547                                 /* we already created a new track for regions from this playlist, use it */
1548                                 dest_rtv = pm->second;
1549                         }
1550
1551                 } else {
1552                         /* destination time axis view is the one we dragged to */
1553                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1554                 }
1555
1556                 assert (dest_rtv);
1557
1558                 double const dest_layer = i->layer;
1559
1560                 views_to_update.insert (dest_rtv);
1561
1562                 framepos_t where;
1563
1564                 if (changed_position && !_x_constrained) {
1565                         where = rv->region()->position() - drag_delta;
1566                 } else {
1567                         where = rv->region()->position();
1568                 }
1569
1570                 if (changed_tracks) {
1571
1572                         /* insert into new playlist */
1573
1574                         RegionView* new_view = insert_region_into_playlist (
1575                                 RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, modified_playlists
1576                                 );
1577
1578                         if (new_view == 0) {
1579                                 ++i;
1580                                 continue;
1581                         }
1582
1583                         new_views.push_back (new_view);
1584
1585                         /* remove from old playlist */
1586
1587                         /* the region that used to be in the old playlist is not
1588                            moved to the new one - we use a copy of it. as a result,
1589                            any existing editor for the region should no longer be
1590                            visible.
1591                         */
1592                         rv->hide_region_editor();
1593
1594
1595                         remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
1596
1597                 } else {
1598
1599                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1600
1601                         /* this movement may result in a crossfade being modified, or a layering change,
1602                            so we need to get undo data from the playlist as well as the region.
1603                         */
1604
1605                         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (playlist);
1606                         if (r.second) {
1607                                 playlist->clear_changes ();
1608                         }
1609
1610                         rv->region()->clear_changes ();
1611
1612                         /*
1613                            motion on the same track. plonk the previously reparented region
1614                            back to its original canvas group (its streamview).
1615                            No need to do anything for copies as they are fake regions which will be deleted.
1616                         */
1617
1618                         rv->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1619                         rv->get_canvas_group()->set_y_position (i->initial_y);
1620                         rv->drag_end ();
1621
1622                         /* just change the model */
1623                         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1624                                 playlist->set_layer (rv->region(), dest_layer);
1625                         }
1626
1627                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
1628
1629                         r = frozen_playlists.insert (playlist);
1630
1631                         if (r.second) {
1632                                 playlist->freeze ();
1633                         }
1634
1635                         rv->region()->set_position (where);
1636                         _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
1637                 }
1638
1639                 if (changed_tracks) {
1640
1641                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1642                            was selected in all of them, then removing it from a playlist will have removed all
1643                            trace of it from _views (i.e. there were N regions selected, we removed 1,
1644                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1645                            corresponding regionview, and _views is now empty).
1646
1647                            This could have invalidated any and all iterators into _views.
1648
1649                            The heuristic we use here is: if the region selection is empty, break out of the loop
1650                            here. if the region selection is not empty, then restart the loop because we know that
1651                            we must have removed at least the region(view) we've just been working on as well as any
1652                            that we processed on previous iterations.
1653
1654                            EXCEPT .... if we are doing a copy drag, then _views hasn't been modified and
1655                            we can just iterate.
1656                         */
1657
1658
1659                         if (_views.empty()) {
1660                                 break;
1661                         } else {
1662                                 i = _views.begin();
1663                         }
1664
1665                 } else {
1666                         ++i;
1667                 }
1668         }
1669
1670         /* If we've created new regions either by copying or moving
1671            to a new track, we want to replace the old selection with the new ones
1672         */
1673
1674         if (new_views.size() > 0) {
1675                 _editor->selection->set (new_views);
1676         }
1677
1678         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1679                 (*p)->thaw();
1680         }
1681
1682         /* write commands for the accumulated diffs for all our modified playlists */
1683         add_stateful_diff_commands_for_playlists (modified_playlists);
1684         /* applies to _brushing */
1685         _editor->commit_reversible_command ();
1686
1687         /* We have futzed with the layering of canvas items on our streamviews.
1688            If any region changed layer, this will have resulted in the stream
1689            views being asked to set up their region views, and all will be well.
1690            If not, we might now have badly-ordered region views.  Ask the StreamViews
1691            involved to sort themselves out, just in case.
1692         */
1693
1694         for (set<RouteTimeAxisView*>::iterator i = views_to_update.begin(); i != views_to_update.end(); ++i) {
1695                 (*i)->view()->playlist_layered ((*i)->track ());
1696         }
1697 }
1698
1699 /** Remove a region from a playlist, clearing the diff history of the playlist first if necessary.
1700  *  @param region Region to remove.
1701  *  @param playlist playlist To remove from.
1702  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1703  *  that clear_changes () is only called once per playlist.
1704  */
1705 void
1706 RegionMoveDrag::remove_region_from_playlist (
1707         boost::shared_ptr<Region> region,
1708         boost::shared_ptr<Playlist> playlist,
1709         PlaylistSet& modified_playlists
1710         )
1711 {
1712         pair<set<boost::shared_ptr<Playlist> >::iterator, bool> r = modified_playlists.insert (playlist);
1713
1714         if (r.second) {
1715                 playlist->clear_changes ();
1716         }
1717
1718         playlist->remove_region (region); // should be no need to ripple; we better already have rippled the playlist in RegionRippleDrag
1719 }
1720
1721
1722 /** Insert a region into a playlist, handling the recovery of the resulting new RegionView, and
1723  *  clearing the playlist's diff history first if necessary.
1724  *  @param region Region to insert.
1725  *  @param dest_rtv Destination RouteTimeAxisView.
1726  *  @param dest_layer Destination layer.
1727  *  @param where Destination position.
1728  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1729  *  that clear_changes () is only called once per playlist.
1730  *  @return New RegionView, or 0 if no insert was performed.
1731  */
1732 RegionView *
1733 RegionMoveDrag::insert_region_into_playlist (
1734         boost::shared_ptr<Region> region,
1735         RouteTimeAxisView* dest_rtv,
1736         layer_t dest_layer,
1737         framecnt_t where,
1738         PlaylistSet& modified_playlists
1739         )
1740 {
1741         boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
1742         if (!dest_playlist) {
1743                 return 0;
1744         }
1745
1746         /* arrange to collect the new region view that will be created as a result of our playlist insertion */
1747         _new_region_view = 0;
1748         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &RegionMoveDrag::collect_new_region_view));
1749
1750         /* clear history for the playlist we are about to insert to, provided we haven't already done so */
1751         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (dest_playlist);
1752         if (r.second) {
1753                 dest_playlist->clear_changes ();
1754         }
1755
1756         dest_playlist->add_region (region, where);
1757
1758         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1759                 dest_playlist->set_layer (region, dest_layer);
1760         }
1761
1762         c.disconnect ();
1763
1764         assert (_new_region_view);
1765
1766         return _new_region_view;
1767 }
1768
1769 void
1770 RegionMoveDrag::collect_new_region_view (RegionView* rv)
1771 {
1772         _new_region_view = rv;
1773 }
1774
1775 void
1776 RegionMoveDrag::add_stateful_diff_commands_for_playlists (PlaylistSet const & playlists)
1777 {
1778         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1779                 StatefulDiffCommand* c = new StatefulDiffCommand (*i);
1780                 if (!c->empty()) {
1781                         _editor->session()->add_command (c);
1782                 } else {
1783                         delete c;
1784                 }
1785         }
1786 }
1787
1788
1789 void
1790 RegionMoveDrag::aborted (bool movement_occurred)
1791 {
1792         if (_copy) {
1793
1794                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1795                         list<DraggingView>::const_iterator next = i;
1796                         ++next;
1797                         delete i->view;
1798                         i = next;
1799                 }
1800
1801                 _views.clear ();
1802
1803         } else {
1804                 RegionMotionDrag::aborted (movement_occurred);
1805         }
1806 }
1807
1808 void
1809 RegionMotionDrag::aborted (bool)
1810 {
1811         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1812
1813                 StreamView* sview = (*i)->view();
1814
1815                 if (sview) {
1816                         if (sview->layer_display() == Expanded) {
1817                                 sview->set_layer_display (Stacked);
1818                         }
1819                 }
1820         }
1821
1822         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1823                 RegionView* rv = i->view;
1824                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1825                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1826                 assert (rtv);
1827                 rv->get_canvas_group()->reparent (rtv->view()->canvas_item());
1828                 rv->get_canvas_group()->set_y_position (0);
1829                 rv->drag_end ();
1830                 rv->move (-_total_x_delta, 0);
1831                 rv->set_height (rtv->view()->child_height ());
1832         }
1833 }
1834
1835 /** @param b true to brush, otherwise false.
1836  *  @param c true to make copies of the regions being moved, otherwise false.
1837  */
1838 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1839         : RegionMotionDrag (e, i, p, v, b)
1840         , _copy (c)
1841         , _new_region_view (0)
1842 {
1843         DEBUG_TRACE (DEBUG::Drags, "New RegionMoveDrag\n");
1844
1845         double speed = 1;
1846         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&_primary->get_time_axis_view ());
1847         if (rtv && rtv->is_track()) {
1848                 speed = rtv->track()->speed ();
1849         }
1850
1851         _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
1852 }
1853
1854 void
1855 RegionMoveDrag::setup_pointer_frame_offset ()
1856 {
1857         _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
1858 }
1859
1860 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
1861         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1862 {
1863         DEBUG_TRACE (DEBUG::Drags, "New RegionInsertDrag\n");
1864
1865         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1866                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1867
1868         _primary = v->view()->create_region_view (r, false, false);
1869
1870         _primary->get_canvas_group()->show ();
1871         _primary->set_position (pos, 0);
1872         _views.push_back (DraggingView (_primary, this, v));
1873
1874         _last_frame_position = pos;
1875
1876         _item = _primary->get_canvas_group ();
1877 }
1878
1879 void
1880 RegionInsertDrag::finished (GdkEvent *, bool)
1881 {
1882         int pos = _views.front().time_axis_view;
1883         assert(pos >= 0 && pos < (int)_time_axis_views.size());
1884
1885         RouteTimeAxisView* dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[pos]);
1886
1887         _primary->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1888         _primary->get_canvas_group()->set_y_position (0);
1889
1890         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1891
1892         _editor->begin_reversible_command (Operations::insert_region);
1893         playlist->clear_changes ();
1894         playlist->add_region (_primary->region (), _last_frame_position);
1895
1896         // Mixbus doesn't seem to ripple when inserting regions from the list: should we? yes, probably
1897         if (Config->get_edit_mode() == Ripple) {
1898                 playlist->ripple (_last_frame_position, _primary->region()->length(), _primary->region());
1899         }
1900
1901         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1902         _editor->commit_reversible_command ();
1903
1904         delete _primary;
1905         _primary = 0;
1906         _views.clear ();
1907 }
1908
1909 void
1910 RegionInsertDrag::aborted (bool)
1911 {
1912         delete _primary;
1913         _primary = 0;
1914         _views.clear ();
1915 }
1916
1917 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1918         : RegionMoveDrag (e, i, p, v, false, false)
1919 {
1920         DEBUG_TRACE (DEBUG::Drags, "New RegionSpliceDrag\n");
1921 }
1922
1923 struct RegionSelectionByPosition {
1924         bool operator() (RegionView*a, RegionView* b) {
1925                 return a->region()->position () < b->region()->position();
1926         }
1927 };
1928
1929 void
1930 RegionSpliceDrag::motion (GdkEvent* event, bool)
1931 {
1932         /* Which trackview is this ? */
1933
1934         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
1935         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1936
1937         /* The region motion is only processed if the pointer is over
1938            an audio track.
1939         */
1940
1941         if (!tv || !tv->is_track()) {
1942                 /* To make sure we hide the verbose canvas cursor when the mouse is
1943                    not held over an audio track.
1944                 */
1945                 _editor->verbose_cursor()->hide ();
1946                 return;
1947         } else {
1948                 _editor->verbose_cursor()->show ();
1949         }
1950
1951         int dir;
1952
1953         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1954                 dir = 1;
1955         } else {
1956                 dir = -1;
1957         }
1958
1959         RegionSelection copy;
1960         _editor->selection->regions.by_position(copy);
1961
1962         framepos_t const pf = adjusted_current_frame (event);
1963
1964         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1965
1966                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1967
1968                 if (!atv) {
1969                         continue;
1970                 }
1971
1972                 boost::shared_ptr<Playlist> playlist;
1973
1974                 if ((playlist = atv->playlist()) == 0) {
1975                         continue;
1976                 }
1977
1978                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1979                         continue;
1980                 }
1981
1982                 if (dir > 0) {
1983                         if (pf < (*i)->region()->last_frame() + 1) {
1984                                 continue;
1985                         }
1986                 } else {
1987                         if (pf > (*i)->region()->first_frame()) {
1988                                 continue;
1989                         }
1990                 }
1991
1992
1993                 playlist->shuffle ((*i)->region(), dir);
1994         }
1995 }
1996
1997 void
1998 RegionSpliceDrag::finished (GdkEvent* event, bool movement_occurred)
1999 {
2000         RegionMoveDrag::finished (event, movement_occurred);
2001 }
2002
2003 void
2004 RegionSpliceDrag::aborted (bool)
2005 {
2006         /* XXX: TODO */
2007 }
2008
2009 /***
2010  * ripple mode...
2011  */
2012
2013 void
2014 RegionRippleDrag::add_all_after_to_views(TimeAxisView *tav, framepos_t where, const RegionSelection &exclude, bool drag_in_progress)
2015 {
2016
2017         boost::shared_ptr<RegionList> rl = tav->playlist()->regions_with_start_within (Evoral::Range<framepos_t>(where, max_framepos));
2018
2019         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(tav);
2020         RegionSelection to_ripple;
2021         for (RegionList::iterator i = rl->begin(); i != rl->end(); ++i) {
2022                 if ((*i)->position() >= where) {
2023                         to_ripple.push_back (rtv->view()->find_view(*i));
2024                 }
2025         }
2026
2027         for (RegionSelection::iterator i = to_ripple.begin(); i != to_ripple.end(); ++i) {
2028                 if (!exclude.contains (*i)) {
2029                         // the selection has already been added to _views
2030
2031                         if (drag_in_progress) {
2032                                 // do the same things that RegionMotionDrag::motion does when
2033                                 // first_move is true, for the region views that we're adding
2034                                 // to _views this time
2035
2036                                 (*i)->drag_start();
2037                                 ArdourCanvas::Item* rvg = (*i)->get_canvas_group();
2038                                 Duple rv_canvas_offset = rvg->item_to_canvas (Duple (0,0));
2039                                 Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
2040                                 rvg->reparent (_editor->_drag_motion_group);
2041
2042                                 // we only need to move in the y direction
2043                                 Duple fudge = rv_canvas_offset - dmg_canvas_offset;
2044                                 fudge.x = 0;
2045                                 rvg->move (fudge);
2046
2047                         }
2048                         _views.push_back (DraggingView (*i, this, tav));
2049                 }
2050         }
2051 }
2052
2053 void
2054 RegionRippleDrag::remove_unselected_from_views(framecnt_t amount, bool move_regions)
2055 {
2056
2057         for (std::list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ) {
2058                 // we added all the regions after the selection
2059
2060                 std::list<DraggingView>::iterator to_erase = i++;
2061                 if (!_editor->selection->regions.contains (to_erase->view)) {
2062                         // restore the non-selected regions to their original playlist & positions,
2063                         // and then ripple them back by the length of the regions that were dragged away
2064                         // do the same things as RegionMotionDrag::aborted
2065
2066                         RegionView *rv = to_erase->view;
2067                         TimeAxisView* tv = &(rv->get_time_axis_view ());
2068                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
2069                         assert (rtv);
2070
2071                         // plonk them back onto their own track
2072                         rv->get_canvas_group()->reparent(rtv->view()->canvas_item());
2073                         rv->get_canvas_group()->set_y_position (0);
2074                         rv->drag_end ();
2075
2076                         if (move_regions) {
2077                                 // move the underlying region to match the view
2078                                 rv->region()->set_position (rv->region()->position() + amount);
2079                         } else {
2080                                 // restore the view to match the underlying region's original position
2081                                 rv->move(-amount, 0);   // second parameter is y delta - seems 0 is OK
2082                         }
2083
2084                         rv->set_height (rtv->view()->child_height ());
2085                         _views.erase (to_erase);
2086                 }
2087         }
2088 }
2089
2090 bool
2091 RegionRippleDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
2092 {
2093         if (RegionMotionDrag::y_movement_allowed (delta_track, delta_layer, skip_invisible)) {
2094                 if (delta_track) {
2095                         return allow_moves_across_tracks;
2096                 } else {
2097                         return true;
2098                 }
2099         }
2100         return false;
2101 }
2102
2103 RegionRippleDrag::RegionRippleDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2104         : RegionMoveDrag (e, i, p, v, false, false)
2105 {
2106         DEBUG_TRACE (DEBUG::Drags, "New RegionRippleDrag\n");
2107         // compute length of selection
2108         RegionSelection selected_regions = _editor->selection->regions;
2109         selection_length = selected_regions.end_frame() - selected_regions.start();
2110
2111         // we'll only allow dragging to another track in ripple mode if all the regions
2112         // being dragged start off on the same track
2113         allow_moves_across_tracks = (selected_regions.playlists().size() == 1);
2114         prev_tav = NULL;
2115         prev_amount = 0;
2116         exclude = new RegionList;
2117         for (RegionSelection::iterator i =selected_regions.begin(); i != selected_regions.end(); ++i) {
2118                 exclude->push_back((*i)->region());
2119         }
2120
2121         // also add regions before start of selection to exclude, to be consistent with how Mixbus does ripple
2122         RegionSelection copy;
2123         selected_regions.by_position(copy); // get selected regions sorted by position into copy
2124
2125         std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = copy.playlists();
2126         std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2127
2128         for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2129                 // find ripple start point on each applicable playlist
2130                 RegionView *first_selected_on_this_track = NULL;
2131                 for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
2132                         if ((*i)->region()->playlist() == (*pi)) {
2133                                 // region is on this playlist - it's the first, because they're sorted
2134                                 first_selected_on_this_track = *i;
2135                                 break;
2136                         }
2137                 }
2138                 assert (first_selected_on_this_track); // we should always find the region in one of the playlists...
2139                 add_all_after_to_views (
2140                                 &first_selected_on_this_track->get_time_axis_view(),
2141                                 first_selected_on_this_track->region()->position(),
2142                                 selected_regions, false);
2143         }
2144
2145         if (allow_moves_across_tracks) {
2146                 orig_tav = &(*selected_regions.begin())->get_time_axis_view();
2147         } else {
2148                 orig_tav = NULL;
2149         }
2150
2151 }
2152
2153 void
2154 RegionRippleDrag::motion (GdkEvent* event, bool first_move)
2155 {
2156         /* Which trackview is this ? */
2157
2158         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
2159         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
2160
2161         /* The region motion is only processed if the pointer is over
2162            an audio track.
2163          */
2164
2165         if (!tv || !tv->is_track()) {
2166                 /* To make sure we hide the verbose canvas cursor when the mouse is
2167                    not held over an audiotrack.
2168                  */
2169                 _editor->verbose_cursor()->hide ();
2170                 return;
2171         }
2172
2173         framepos_t where = adjusted_current_frame (event);
2174         assert (where >= 0);
2175         framepos_t after;
2176         double delta = compute_x_delta (event, &after);
2177
2178         framecnt_t amount = _editor->pixel_to_sample (delta);
2179
2180         if (allow_moves_across_tracks) {
2181                 // all the originally selected regions were on the same track
2182
2183                 framecnt_t adjust = 0;
2184                 if (prev_tav && tv != prev_tav) {
2185                         // dragged onto a different track
2186                         // remove the unselected regions from _views, restore them to their original positions
2187                         // and add the regions after the drop point on the new playlist to _views instead.
2188                         // undo the effect of rippling the previous playlist, and include the effect of removing
2189                         // the dragged region(s) from this track
2190
2191                         remove_unselected_from_views (prev_amount, false);
2192                         // ripple previous playlist according to the regions that have been removed onto the new playlist
2193                         prev_tav->playlist()->ripple(prev_position, -selection_length, exclude);
2194                         prev_amount = 0;
2195
2196                         // move just the selected regions
2197                         RegionMoveDrag::motion(event, first_move);
2198
2199                         // ensure that the ripple operation on the new playlist inserts selection_length time
2200                         adjust = selection_length;
2201                         // ripple the new current playlist
2202                         tv->playlist()->ripple (where, amount+adjust, exclude);
2203
2204                         // add regions after point where drag entered this track to subsequent ripples
2205                         add_all_after_to_views (tv, where, _editor->selection->regions, true);
2206
2207                 } else {
2208                         // motion on same track
2209                         RegionMoveDrag::motion(event, first_move);
2210                 }
2211                 prev_tav = tv;
2212
2213                 // remember what we've done to this playlist so we can undo it if the selection is dragged to another track
2214                 prev_position = where;
2215         } else {
2216                 // selection encompasses multiple tracks - just drag
2217                 // cross-track drags are forbidden
2218                 RegionMoveDrag::motion(event, first_move);
2219         }
2220
2221         if (!_x_constrained) {
2222                 prev_amount += amount;
2223         }
2224
2225         _last_frame_position = after;
2226 }
2227
2228 void
2229 RegionRippleDrag::finished (GdkEvent* event, bool movement_occurred)
2230 {
2231         if (!movement_occurred) {
2232
2233                 /* just a click */
2234
2235                 if (was_double_click() && !_views.empty()) {
2236                         DraggingView dv = _views.front();
2237                         dv.view->show_region_editor ();
2238
2239                 }
2240
2241                 return;
2242         }
2243
2244         _editor->begin_reversible_command(_("Ripple drag"));
2245
2246         // remove the regions being rippled from the dragging view, updating them to
2247         // their new positions
2248         remove_unselected_from_views (prev_amount, true);
2249
2250         if (allow_moves_across_tracks) {
2251                 if (orig_tav) {
2252                         // if regions were dragged across tracks, we've rippled any later
2253                         // regions on the track the regions were dragged off, so we need
2254                         // to add the original track to the undo record
2255                         orig_tav->playlist()->clear_changes();
2256                         vector<Command*> cmds;
2257                         orig_tav->playlist()->rdiff (cmds);
2258                         _editor->session()->add_commands (cmds);
2259                 }
2260                 if (prev_tav && prev_tav != orig_tav) {
2261                         prev_tav->playlist()->clear_changes();
2262                         vector<Command*> cmds;
2263                         prev_tav->playlist()->rdiff (cmds);
2264                         _editor->session()->add_commands (cmds);
2265                 }
2266         } else {
2267                 // selection spanned multiple tracks - all will need adding to undo record
2268
2269                 std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = _editor->selection->regions.playlists();
2270                 std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2271
2272                 for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2273                         (*pi)->clear_changes();
2274                         vector<Command*> cmds;
2275                         (*pi)->rdiff (cmds);
2276                         _editor->session()->add_commands (cmds);
2277                 }
2278         }
2279
2280         // other modified playlists are added to undo by RegionMoveDrag::finished()
2281         RegionMoveDrag::finished (event, movement_occurred);
2282         _editor->commit_reversible_command();
2283 }
2284
2285 void
2286 RegionRippleDrag::aborted (bool movement_occurred)
2287 {
2288         RegionMoveDrag::aborted (movement_occurred);
2289         _views.clear ();
2290 }
2291
2292
2293 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
2294         : Drag (e, i),
2295           _view (dynamic_cast<MidiTimeAxisView*> (v))
2296 {
2297         DEBUG_TRACE (DEBUG::Drags, "New RegionCreateDrag\n");
2298
2299         assert (_view);
2300 }
2301
2302 void
2303 RegionCreateDrag::motion (GdkEvent* event, bool first_move)
2304 {
2305         if (first_move) {
2306                 _editor->begin_reversible_command (_("create region"));
2307                 _region = add_midi_region (_view, false);
2308                 _view->playlist()->freeze ();
2309         } else {
2310                 if (_region) {
2311                         framepos_t const f = adjusted_current_frame (event);
2312                         if (f < grab_frame()) {
2313                                 _region->set_initial_position (f);
2314                         }
2315
2316                         /* Don't use a zero-length region, and subtract 1 frame from the snapped length
2317                            so that if this region is duplicated, its duplicate starts on
2318                            a snap point rather than 1 frame after a snap point.  Otherwise things get
2319                            a bit confusing as if a region starts 1 frame after a snap point, one cannot
2320                            place snapped notes at the start of the region.
2321                         */
2322
2323                         framecnt_t const len = (framecnt_t) fabs ((double)(f - grab_frame () - 1));
2324                         _region->set_length (len < 1 ? 1 : len);
2325                 }
2326         }
2327 }
2328
2329 void
2330 RegionCreateDrag::finished (GdkEvent*, bool movement_occurred)
2331 {
2332         if (!movement_occurred) {
2333                 add_midi_region (_view, true);
2334         } else {
2335                 _view->playlist()->thaw ();
2336                 _editor->commit_reversible_command();
2337         }
2338 }
2339
2340 void
2341 RegionCreateDrag::aborted (bool)
2342 {
2343         if (_region) {
2344                 _view->playlist()->thaw ();
2345         }
2346
2347         /* XXX */
2348 }
2349
2350 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
2351         : Drag (e, i)
2352         , region (0)
2353         , relative (false)
2354         , at_front (true)
2355         , _was_selected (false)
2356         , _snap_delta (0)
2357 {
2358         DEBUG_TRACE (DEBUG::Drags, "New NoteResizeDrag\n");
2359 }
2360
2361 void
2362 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
2363 {
2364         Gdk::Cursor* cursor;
2365         NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2366         assert (cnote);
2367         float x_fraction = cnote->mouse_x_fraction ();
2368
2369         if (x_fraction > 0.0 && x_fraction < 0.25) {
2370                 cursor = _editor->cursors()->left_side_trim;
2371                 at_front = true;
2372         } else  {
2373                 cursor = _editor->cursors()->right_side_trim;
2374                 at_front = false;
2375         }
2376
2377         Drag::start_grab (event, cursor);
2378
2379         region = &cnote->region_view();
2380
2381         double temp;
2382         temp = region->snap_to_pixel (cnote->x0 (), true);
2383         _snap_delta = temp - cnote->x0 ();
2384
2385         _item->grab ();
2386
2387         if (event->motion.state & ArdourKeyboard::note_size_relative_modifier ()) {
2388                 relative = false;
2389         } else {
2390                 relative = true;
2391         }
2392         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2393         if (ms.size() > 1) {
2394                 /* has to be relative, may make no sense otherwise */
2395                 relative = true;
2396         }
2397
2398         if (!(_was_selected = cnote->selected())) {
2399
2400                 /* tertiary-click means extend selection - we'll do that on button release,
2401                    so don't add it here, because otherwise we make it hard to figure
2402                    out the "extend-to" range.
2403                 */
2404
2405                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2406
2407                 if (!extend) {
2408                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2409
2410                         if (add) {
2411                                 region->note_selected (cnote, true);
2412                         } else {
2413                                 _editor->get_selection().clear_points();
2414                                 region->unique_select (cnote);
2415                         }
2416                 }
2417         }
2418 }
2419
2420 void
2421 NoteResizeDrag::motion (GdkEvent* event, bool first_move)
2422 {
2423         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2424         if (first_move) {
2425                 _editor->begin_reversible_command (_("resize notes"));
2426
2427                 for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
2428                         MidiRegionSelection::iterator next;
2429                         next = r;
2430                         ++next;
2431                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2432                         if (mrv) {
2433                                 mrv->begin_resizing (at_front);
2434                         }
2435                         r = next;
2436                 }
2437         }
2438
2439         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2440                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2441                 assert (nb);
2442                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2443                 if (mrv) {
2444                         double sd = 0.0;
2445                         bool snap = true;
2446                         bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2447
2448                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2449                                 if (_editor->snap_mode () != SnapOff) {
2450                                         snap = false;
2451                                 }
2452                         } else {
2453                                 if (_editor->snap_mode () == SnapOff) {
2454                                         snap = false;
2455                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2456                                         if (apply_snap_delta) {
2457                                                 snap = true;
2458                                         }
2459                                 }
2460                         }
2461
2462                         if (apply_snap_delta) {
2463                                 sd = _snap_delta;
2464                         }
2465
2466                         mrv->update_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2467                 }
2468         }
2469 }
2470
2471 void
2472 NoteResizeDrag::finished (GdkEvent* event, bool movement_occurred)
2473 {
2474         if (!movement_occurred) {
2475                 /* no motion - select note */
2476                 NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2477                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
2478                     _editor->current_mouse_mode() == Editing::MouseDraw) {
2479
2480                         bool changed = false;
2481
2482                         if (_was_selected) {
2483                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2484                                 if (add) {
2485                                         region->note_deselected (cnote);
2486                                         changed = true;
2487                                 } else {
2488                                         _editor->get_selection().clear_points();
2489                                         region->unique_select (cnote);
2490                                         changed = true;
2491                                 }
2492                         } else {
2493                                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2494                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2495
2496                                 if (!extend && !add && region->selection_size() > 1) {
2497                                         _editor->get_selection().clear_points();
2498                                         region->unique_select (cnote);
2499                                         changed = true;
2500                                 } else if (extend) {
2501                                         region->note_selected (cnote, true, true);
2502                                         changed = true;
2503                                 } else {
2504                                         /* it was added during button press */
2505                                         changed = true;
2506                                 }
2507                         }
2508
2509                         if (changed) {
2510                                 _editor->begin_reversible_selection_op(X_("Resize Select Note Release"));
2511                                 _editor->commit_reversible_selection_op();
2512                         }
2513                 }
2514
2515                 return;
2516         }
2517
2518         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2519         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2520                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2521                 assert (nb);
2522                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2523                 double sd = 0.0;
2524                 bool snap = true;
2525                 bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2526                 if (mrv) {
2527                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2528                                 if (_editor->snap_mode () != SnapOff) {
2529                                         snap = false;
2530                                 }
2531                         } else {
2532                                 if (_editor->snap_mode () == SnapOff) {
2533                                         snap = false;
2534                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2535                                         if (apply_snap_delta) {
2536                                                 snap = true;
2537                                         }
2538                                 }
2539                         }
2540
2541                         if (apply_snap_delta) {
2542                                 sd = _snap_delta;
2543                         }
2544
2545                         mrv->commit_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2546                 }
2547         }
2548
2549         _editor->commit_reversible_command ();
2550 }
2551
2552 void
2553 NoteResizeDrag::aborted (bool)
2554 {
2555         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2556         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2557                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2558                 if (mrv) {
2559                         mrv->abort_resizing ();
2560                 }
2561         }
2562 }
2563
2564 AVDraggingView::AVDraggingView (RegionView* v)
2565         : view (v)
2566 {
2567         initial_position = v->region()->position ();
2568 }
2569
2570 VideoTimeLineDrag::VideoTimeLineDrag (Editor* e, ArdourCanvas::Item* i)
2571         : Drag (e, i)
2572 {
2573         DEBUG_TRACE (DEBUG::Drags, "New VideoTimeLineDrag\n");
2574
2575         RegionSelection rs;
2576         TrackViewList empty;
2577         empty.clear();
2578         _editor->get_regions_after(rs, (framepos_t) 0, empty);
2579         std::list<RegionView*> views = rs.by_layer();
2580
2581         _stuck = false;
2582         for (list<RegionView*>::iterator i = views.begin(); i != views.end(); ++i) {
2583                 RegionView* rv = (*i);
2584                 if (!rv->region()->video_locked()) {
2585                         continue;
2586                 }
2587                 if (rv->region()->locked()) {
2588                         _stuck = true;
2589                 }
2590                 _views.push_back (AVDraggingView (rv));
2591         }
2592 }
2593
2594 void
2595 VideoTimeLineDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2596 {
2597         Drag::start_grab (event);
2598         if (_editor->session() == 0) {
2599                 return;
2600         }
2601
2602         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
2603                 _stuck = false;
2604                 _views.clear();
2605         }
2606
2607         if (_stuck) {
2608                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2609                 return;
2610         }
2611
2612         _startdrag_video_offset=ARDOUR_UI::instance()->video_timeline->get_offset();
2613         _max_backwards_drag = (
2614                           ARDOUR_UI::instance()->video_timeline->get_duration()
2615                         + ARDOUR_UI::instance()->video_timeline->get_offset()
2616                         - ceil(ARDOUR_UI::instance()->video_timeline->get_apv())
2617                         );
2618
2619         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2620                 if (i->initial_position < _max_backwards_drag || _max_backwards_drag < 0) {
2621                         _max_backwards_drag = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv (i->initial_position);
2622                 }
2623         }
2624         DEBUG_TRACE (DEBUG::Drags, string_compose("VideoTimeLineDrag: max backwards-drag: %1\n", _max_backwards_drag));
2625
2626         char buf[128];
2627         Timecode::Time timecode;
2628         _editor->session()->sample_to_timecode(abs(_startdrag_video_offset), timecode, true /* use_offset */, false /* use_subframes */ );
2629         snprintf (buf, sizeof (buf), "Video Start:\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, (_startdrag_video_offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
2630         show_verbose_cursor_text (buf);
2631 }
2632
2633 void
2634 VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
2635 {
2636         if (_editor->session() == 0) {
2637                 return;
2638         }
2639         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2640                 return;
2641         }
2642         if (_stuck) {
2643                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2644                 return;
2645         }
2646
2647         framecnt_t dt = adjusted_current_frame (event) - raw_grab_frame() + _pointer_frame_offset;
2648         dt = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv(_startdrag_video_offset+dt) - _startdrag_video_offset;
2649
2650         if (_max_backwards_drag >= 0 && dt <= - _max_backwards_drag) {
2651                 dt = - _max_backwards_drag;
2652         }
2653
2654         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset+dt);
2655         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2656
2657         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2658                 RegionView* rv = i->view;
2659                 DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
2660                 if (first_move) {
2661                         rv->drag_start ();
2662                         rv->region()->clear_changes ();
2663                         rv->region()->suspend_property_changes();
2664                 }
2665                 rv->region()->set_position(i->initial_position + dt);
2666                 rv->region_changed(ARDOUR::Properties::position);
2667         }
2668
2669         const framepos_t offset = ARDOUR_UI::instance()->video_timeline->get_offset();
2670         Timecode::Time timecode;
2671         Timecode::Time timediff;
2672         char buf[128];
2673         _editor->session()->sample_to_timecode(abs(offset), timecode, true /* use_offset */, false /* use_subframes */ );
2674         _editor->session()->sample_to_timecode(abs(dt), timediff, false /* use_offset */, false /* use_subframes */ );
2675         snprintf (buf, sizeof (buf),
2676                         "%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2677                         "\n%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2678                         , _("Video Start:"),
2679                                 (offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames
2680                         , _("Diff:"),
2681                                 (dt<0?'-':' '), timediff.hours, timediff.minutes, timediff.seconds, timediff.frames
2682                                 );
2683         show_verbose_cursor_text (buf);
2684 }
2685
2686 void
2687 VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
2688 {
2689         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2690                 return;
2691         }
2692         if (_stuck) {
2693                 return;
2694         }
2695
2696         if (!movement_occurred || ! _editor->session()) {
2697                 return;
2698         }
2699
2700         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2701
2702         _editor->begin_reversible_command (_("Move Video"));
2703
2704         XMLNode &before = ARDOUR_UI::instance()->video_timeline->get_state();
2705         ARDOUR_UI::instance()->video_timeline->save_undo();
2706         XMLNode &after = ARDOUR_UI::instance()->video_timeline->get_state();
2707         _editor->session()->add_command(new MementoCommand<VideoTimeLine>(*(ARDOUR_UI::instance()->video_timeline), &before, &after));
2708
2709         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2710                 i->view->drag_end();
2711                 i->view->region()->resume_property_changes ();
2712
2713                 _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
2714         }
2715
2716         _editor->session()->maybe_update_session_range(
2717                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset(), (ARDOUR::frameoffset_t) 0),
2718                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset() + ARDOUR_UI::instance()->video_timeline->get_duration(), (ARDOUR::frameoffset_t) 0)
2719                         );
2720
2721
2722         _editor->commit_reversible_command ();
2723 }
2724
2725 void
2726 VideoTimeLineDrag::aborted (bool)
2727 {
2728         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2729                 return;
2730         }
2731         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset);
2732         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2733
2734         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2735                 i->view->region()->resume_property_changes ();
2736                 i->view->region()->set_position(i->initial_position);
2737         }
2738 }
2739
2740 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool preserve_fade_anchor)
2741         : RegionDrag (e, i, p, v)
2742         , _operation (StartTrim)
2743         , _preserve_fade_anchor (preserve_fade_anchor)
2744         , _jump_position_when_done (false)
2745 {
2746         DEBUG_TRACE (DEBUG::Drags, "New TrimDrag\n");
2747 }
2748
2749 void
2750 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2751 {
2752         double speed = 1.0;
2753         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2754         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2755
2756         if (tv && tv->is_track()) {
2757                 speed = tv->track()->speed();
2758         }
2759
2760         framepos_t const region_start = (framepos_t) (_primary->region()->position() / speed);
2761         framepos_t const region_end = (framepos_t) (_primary->region()->last_frame() / speed);
2762         framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
2763
2764         framepos_t const pf = adjusted_current_frame (event);
2765         setup_snap_delta (region_start);
2766
2767         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_contents_modifier ())) {
2768                 /* Move the contents of the region around without changing the region bounds */
2769                 _operation = ContentsTrim;
2770                 Drag::start_grab (event, _editor->cursors()->trimmer);
2771         } else {
2772                 /* These will get overridden for a point trim.*/
2773                 if (pf < (region_start + region_length/2)) {
2774                         /* closer to front */
2775                         _operation = StartTrim;
2776                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2777                                 Drag::start_grab (event, _editor->cursors()->anchored_left_side_trim);
2778                         } else {
2779                                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
2780                         }
2781                 } else {
2782                         /* closer to end */
2783                         _operation = EndTrim;
2784                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2785                                 Drag::start_grab (event, _editor->cursors()->anchored_right_side_trim);
2786                         } else {
2787                                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
2788                         }
2789                 }
2790         }
2791         /* jump trim disabled for now
2792         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::trim_jump_modifier ())) {
2793                 _jump_position_when_done = true;
2794         }
2795         */
2796
2797         switch (_operation) {
2798         case StartTrim:
2799                 show_verbose_cursor_time (region_start);
2800                 break;
2801         case EndTrim:
2802                 show_verbose_cursor_duration (region_start, region_end);
2803                 break;
2804         case ContentsTrim:
2805                 show_verbose_cursor_time (pf);
2806                 break;
2807         }
2808
2809         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2810                 i->view->region()->suspend_property_changes ();
2811         }
2812 }
2813
2814 void
2815 TrimDrag::motion (GdkEvent* event, bool first_move)
2816 {
2817         RegionView* rv = _primary;
2818
2819         double speed = 1.0;
2820         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2821         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2822         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
2823         frameoffset_t frame_delta = 0;
2824
2825         if (tv && tv->is_track()) {
2826                 speed = tv->track()->speed();
2827         }
2828         framecnt_t adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
2829         framecnt_t dt = adj_frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
2830
2831         if (first_move) {
2832
2833                 string trim_type;
2834
2835                 switch (_operation) {
2836                 case StartTrim:
2837                         trim_type = "Region start trim";
2838                         break;
2839                 case EndTrim:
2840                         trim_type = "Region end trim";
2841                         break;
2842                 case ContentsTrim:
2843                         trim_type = "Region content trim";
2844                         break;
2845                 default:
2846                         assert(0);
2847                         break;
2848                 }
2849
2850                 _editor->begin_reversible_command (trim_type);
2851
2852                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2853                         RegionView* rv = i->view;
2854                         rv->enable_display (false);
2855                         rv->region()->playlist()->clear_owned_changes ();
2856
2857                         if (_operation == StartTrim) {
2858                                 rv->trim_front_starting ();
2859                         }
2860
2861                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
2862
2863                         if (arv) {
2864                                 arv->temporarily_hide_envelope ();
2865                                 arv->drag_start ();
2866                         }
2867
2868                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
2869                         insert_result = _editor->motion_frozen_playlists.insert (pl);
2870
2871                         if (insert_result.second) {
2872                                 pl->freeze();
2873                         }
2874                 }
2875         }
2876
2877         bool non_overlap_trim = false;
2878
2879         if (event && Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::trim_overlap_modifier ())) {
2880                 non_overlap_trim = true;
2881         }
2882
2883         /* contstrain trim to fade length */
2884         if (_preserve_fade_anchor) {
2885                 switch (_operation) {
2886                         case StartTrim:
2887                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2888                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2889                                         if (!arv) continue;
2890                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2891                                         if (ar->locked()) continue;
2892                                         framecnt_t len = ar->fade_in()->back()->when;
2893                                         if (len < dt) dt = min(dt, len);
2894                                 }
2895                                 break;
2896                         case EndTrim:
2897                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2898                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2899                                         if (!arv) continue;
2900                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2901                                         if (ar->locked()) continue;
2902                                         framecnt_t len = ar->fade_out()->back()->when;
2903                                         if (len < -dt) dt = max(dt, -len);
2904                                 }
2905                                 break;
2906                         case ContentsTrim:
2907                                 break;
2908                 }
2909         }
2910
2911
2912         switch (_operation) {
2913         case StartTrim:
2914                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2915                         bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim);
2916                         if (changed && _preserve_fade_anchor) {
2917                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2918                                 if (arv) {
2919                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2920                                         framecnt_t len = ar->fade_in()->back()->when;
2921                                         framecnt_t diff = ar->first_frame() - i->initial_position;
2922                                         framepos_t new_length = len - diff;
2923                                         i->anchored_fade_length = min (ar->length(), new_length);
2924                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
2925                                         arv->reset_fade_in_shape_width (ar, i->anchored_fade_length, true);
2926                                 }
2927                         }
2928                 }
2929                 break;
2930
2931         case EndTrim:
2932                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2933                         bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim);
2934                         if (changed && _preserve_fade_anchor) {
2935                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2936                                 if (arv) {
2937                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2938                                         framecnt_t len = ar->fade_out()->back()->when;
2939                                         framecnt_t diff = 1 + ar->last_frame() - i->initial_end;
2940                                         framepos_t new_length = len + diff;
2941                                         i->anchored_fade_length = min (ar->length(), new_length);
2942                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
2943                                         arv->reset_fade_out_shape_width (ar, i->anchored_fade_length, true);
2944                                 }
2945                         }
2946                 }
2947                 break;
2948
2949         case ContentsTrim:
2950                 {
2951                         frame_delta = (last_pointer_frame() - adjusted_current_frame(event));
2952
2953                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2954                                 i->view->move_contents (frame_delta);
2955                         }
2956                 }
2957                 break;
2958         }
2959
2960         switch (_operation) {
2961         case StartTrim:
2962                 show_verbose_cursor_time ((framepos_t) (rv->region()->position() / speed));
2963                 break;
2964         case EndTrim:
2965                 show_verbose_cursor_duration ((framepos_t)  rv->region()->position() / speed, (framepos_t) rv->region()->last_frame() / speed);
2966                 break;
2967         case ContentsTrim:
2968                 // show_verbose_cursor_time (frame_delta);
2969                 break;
2970         }
2971 }
2972
2973 void
2974 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
2975 {
2976         if (movement_occurred) {
2977                 motion (event, false);
2978
2979                 if (_operation == StartTrim) {
2980                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2981                                 {
2982                                         /* This must happen before the region's StatefulDiffCommand is created, as it may
2983                                            `correct' (ahem) the region's _start from being negative to being zero.  It
2984                                            needs to be zero in the undo record.
2985                                         */
2986                                         i->view->trim_front_ending ();
2987                                 }
2988                                 if (_preserve_fade_anchor) {
2989                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2990                                         if (arv) {
2991                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2992                                                 arv->reset_fade_in_shape_width (ar, i->anchored_fade_length);
2993                                                 ar->set_fade_in_length(i->anchored_fade_length);
2994                                                 ar->set_fade_in_active(true);
2995                                         }
2996                                 }
2997                                 if (_jump_position_when_done) {
2998                                         i->view->region()->set_position (i->initial_position);
2999                                 }
3000                         }
3001                 } else if (_operation == EndTrim) {
3002                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3003                                 if (_preserve_fade_anchor) {
3004                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
3005                                         if (arv) {
3006                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
3007                                                 arv->reset_fade_out_shape_width (ar, i->anchored_fade_length);
3008                                                 ar->set_fade_out_length(i->anchored_fade_length);
3009                                                 ar->set_fade_out_active(true);
3010                                         }
3011                                 }
3012                                 if (_jump_position_when_done) {
3013                                         i->view->region()->set_position (i->initial_end - i->view->region()->length());
3014                                 }
3015                         }
3016                 }
3017
3018                 if (!_views.empty()) {
3019                         if (_operation == StartTrim) {
3020                                 _editor->maybe_locate_with_edit_preroll(
3021                                         _views.begin()->view->region()->position());
3022                         }
3023                         if (_operation == EndTrim) {
3024                                 _editor->maybe_locate_with_edit_preroll(
3025                                         _views.begin()->view->region()->position() +
3026                                         _views.begin()->view->region()->length());
3027                         }
3028                 }
3029
3030                 if (!_editor->selection->selected (_primary)) {
3031                         _primary->thaw_after_trim ();
3032                 } else {
3033
3034                         set<boost::shared_ptr<Playlist> > diffed_playlists;
3035
3036                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3037                                 i->view->thaw_after_trim ();
3038                                 i->view->enable_display (true);
3039
3040                                 /* Trimming one region may affect others on the playlist, so we need
3041                                    to get undo Commands from the whole playlist rather than just the
3042                                    region.  Use diffed_playlists to make sure we don't diff a given
3043                                    playlist more than once.
3044                                 */
3045                                 boost::shared_ptr<Playlist> p = i->view->region()->playlist ();
3046                                 if (diffed_playlists.find (p) == diffed_playlists.end()) {
3047                                         vector<Command*> cmds;
3048                                         p->rdiff (cmds);
3049                                         _editor->session()->add_commands (cmds);
3050                                         diffed_playlists.insert (p);
3051                                 }
3052                         }
3053                 }
3054
3055                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
3056                         (*p)->thaw ();
3057                 }
3058
3059                 _editor->motion_frozen_playlists.clear ();
3060                 _editor->commit_reversible_command();
3061
3062         } else {
3063                 /* no mouse movement */
3064                 if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false)) {
3065                         _editor->point_trim (event, adjusted_current_frame (event));
3066                 }
3067         }
3068
3069         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3070                 i->view->region()->resume_property_changes ();
3071         }
3072 }
3073
3074 void
3075 TrimDrag::aborted (bool movement_occurred)
3076 {
3077         /* Our motion method is changing model state, so use the Undo system
3078            to cancel.  Perhaps not ideal, as this will leave an Undo point
3079            behind which may be slightly odd from the user's point of view.
3080         */
3081
3082         finished (0, true);
3083
3084         if (movement_occurred) {
3085                 _editor->undo ();
3086         }
3087
3088         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3089                 i->view->region()->resume_property_changes ();
3090         }
3091 }
3092
3093 void
3094 TrimDrag::setup_pointer_frame_offset ()
3095 {
3096         list<DraggingView>::iterator i = _views.begin ();
3097         while (i != _views.end() && i->view != _primary) {
3098                 ++i;
3099         }
3100
3101         if (i == _views.end()) {
3102                 return;
3103         }
3104
3105         switch (_operation) {
3106         case StartTrim:
3107                 _pointer_frame_offset = raw_grab_frame() - i->initial_position;
3108                 break;
3109         case EndTrim:
3110                 _pointer_frame_offset = raw_grab_frame() - i->initial_end;
3111                 break;
3112         case ContentsTrim:
3113                 break;
3114         }
3115 }
3116
3117 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3118         : Drag (e, i),
3119           _copy (c)
3120         , before_state (0)
3121 {
3122         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3123         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3124         assert (_marker);
3125         _real_section = &_marker->meter();
3126
3127 }
3128
3129 void
3130 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3131 {
3132         Drag::start_grab (event, cursor);
3133         show_verbose_cursor_time (adjusted_current_frame(event));
3134 }
3135
3136 void
3137 MeterMarkerDrag::setup_pointer_frame_offset ()
3138 {
3139         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3140 }
3141
3142 void
3143 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3144 {
3145         if (!_marker->meter().movable()) {
3146                 //return;
3147         }
3148
3149         if (first_move) {
3150
3151                 // create a dummy marker to catch events, then hide it.
3152
3153                 char name[64];
3154                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3155
3156                 _marker = new MeterMarker (
3157                         *_editor,
3158                         *_editor->meter_group,
3159                         UIConfiguration::instance().color ("meter marker"),
3160                         name,
3161                         *new MeterSection (_marker->meter())
3162                 );
3163
3164                 /* use the new marker for the grab */
3165                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3166                 _marker->hide();
3167
3168                 TempoMap& map (_editor->session()->tempo_map());
3169                 /* get current state */
3170                 before_state = &map.get_state();
3171
3172                 if (!_copy) {
3173                         _editor->begin_reversible_command (_("move meter mark"));
3174                 } else {
3175                         _editor->begin_reversible_command (_("copy meter mark"));
3176
3177                         Timecode::BBT_Time bbt = _real_section->bbt();
3178
3179                         /* we can't add a meter where one currently exists */
3180                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3181                                 ++bbt.bars;
3182                         } else {
3183                                 --bbt.bars;
3184                         }
3185                         const double beat = map.bbt_to_beats (bbt);
3186                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3187                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3188
3189                 }
3190         }
3191
3192         framepos_t const pf = adjusted_current_frame (event, false);
3193         if (_marker->meter().position_lock_style() == MusicTime) {
3194                 TempoMap& map (_editor->session()->tempo_map());
3195                 Timecode::BBT_Time bbt;
3196                 map.bbt_time (pf, bbt);
3197                 /* round bbt to bars */
3198                 map.round_bbt (bbt, -1, RoundNearest);
3199
3200                 if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3201                         /* adjust previous tempo to match meter frame */
3202                         _editor->session()->tempo_map().gui_dilate_tempo (_real_section, pf);
3203                 } else if ((bbt.bars != _real_section->bbt().bars && pf > last_pointer_frame())
3204                            || (bbt.bars < _real_section->bbt().bars && pf < last_pointer_frame())) {
3205                         /* move meter beat-based */
3206                         _editor->session()->tempo_map().gui_move_meter_bbt (_real_section, bbt);
3207                 }
3208         } else {
3209                 /* AudioTime */
3210                 if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3211                         /* currently disabled in the lib for AudioTime */
3212                         if (_real_section->movable()) {
3213                                 _editor->session()->tempo_map().gui_dilate_tempo (_real_section, pf);
3214                         }
3215                 } else {
3216                         _editor->session()->tempo_map().gui_move_meter_frame (_real_section, pf);
3217                 }
3218         }
3219         _marker->set_position (pf);
3220         show_verbose_cursor_time (_real_section->frame());
3221 }
3222
3223 void
3224 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3225 {
3226         if (!movement_occurred) {
3227                 if (was_double_click()) {
3228                         _editor->edit_meter_marker (*_marker);
3229                 }
3230                 return;
3231         }
3232
3233         TempoMap& map (_editor->session()->tempo_map());
3234
3235         XMLNode &after = map.get_state();
3236         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3237         _editor->commit_reversible_command ();
3238
3239         // delete the dummy marker we used for visual representation while moving.
3240         // a new visual marker will show up automatically.
3241         delete _marker;
3242 }
3243
3244 void
3245 MeterMarkerDrag::aborted (bool moved)
3246 {
3247         _marker->set_position (_marker->meter().frame ());
3248         if (moved) {
3249                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3250                 // delete the dummy marker we used for visual representation while moving.
3251                 // a new visual marker will show up automatically.
3252                 delete _marker;
3253         }
3254 }
3255
3256 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3257         : Drag (e, i)
3258         , _copy (c)
3259         , before_state (0)
3260 {
3261         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3262
3263         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3264         _real_section = &_marker->tempo();
3265         _movable = _real_section->movable();
3266         assert (_marker);
3267 }
3268
3269 void
3270 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3271 {
3272         Drag::start_grab (event, cursor);
3273         if (!_real_section->active()) {
3274                 show_verbose_cursor_text (_("inactive"));
3275         } else {
3276                 show_verbose_cursor_time (adjusted_current_frame (event));
3277         }
3278 }
3279
3280 void
3281 TempoMarkerDrag::setup_pointer_frame_offset ()
3282 {
3283         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3284 }
3285
3286 void
3287 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3288 {
3289         if (!_real_section->active()) {
3290                 return;
3291         }
3292         if (first_move) {
3293
3294                 // mvc drag - create a dummy marker to catch events, hide it.
3295
3296                 char name[64];
3297                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3298
3299                 TempoSection section (_marker->tempo());
3300
3301                 _marker = new TempoMarker (
3302                         *_editor,
3303                         *_editor->tempo_group,
3304                         UIConfiguration::instance().color ("tempo marker"),
3305                         name,
3306                         *new TempoSection (_marker->tempo())
3307                         );
3308
3309                 /* use the new marker for the grab */
3310                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3311                 _marker->hide();
3312
3313                 TempoMap& map (_editor->session()->tempo_map());
3314                 /* get current state */
3315                 before_state = &map.get_state();
3316                 if (!_copy) {
3317                         _editor->begin_reversible_command (_("move tempo mark"));
3318                 } else {
3319                         _editor->begin_reversible_command (_("copy tempo mark"));
3320                         framepos_t frame;
3321                         bool use_snap = false;
3322
3323                         if (!_editor->snap_musical()) {
3324                                 frame = adjusted_current_frame (event);
3325                         } else {
3326                                 frame = adjusted_current_frame (event, false);
3327                                 if (ArdourKeyboard::indicates_snap (event->button.state)) {
3328                                         if (_editor->snap_mode() == Editing::SnapOff) {
3329                                                 use_snap = true;
3330                                         } else {
3331                                                 use_snap = false;
3332                                         }
3333                                 } else {
3334                                         if (_editor->snap_mode() == Editing::SnapOff) {
3335                                                 use_snap = false;
3336                                         } else {
3337                                                 use_snap = true;
3338                                         }
3339                                 }
3340                         }
3341
3342                         Timecode::BBT_Time bbt;
3343                         map.bbt_time (frame, bbt);
3344
3345                         /* add new tempo section to map, ensuring we don't refer to existing tempos for snap */
3346
3347                         if (_real_section->position_lock_style() == MusicTime) {
3348                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3349                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3350                                 } else if (use_snap) {
3351                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3352                                 }
3353                                 double const pulse = map.predict_tempo_pulse (_real_section, map.frame_time (bbt));
3354                                 _real_section = map.add_tempo (_marker->tempo(), pulse, 0, _real_section->type(), MusicTime);
3355                         } else {
3356                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3357                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3358                                 } else if (use_snap) {
3359                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3360                                 }
3361                                 if (use_snap) {
3362                                         frame = map.predict_tempo_frame (_real_section, bbt);
3363                                 }
3364                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3365                         }
3366                 }
3367
3368         }
3369
3370         framepos_t pf;
3371
3372         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3373                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3374                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3375                 stringstream strs;
3376                 strs << new_bpm;
3377                 show_verbose_cursor_text (strs.str());
3378         } else if (_movable && !_real_section->locked_to_meter()) {
3379                 if (!_editor->snap_musical()) {
3380                         /* snap normally (this is not self-referential).*/
3381                         pf = adjusted_current_frame (event);
3382                 } else {
3383                         /* but this is.
3384                            we can't use the map for anything related to tempo,
3385                            so we round bbt using meters, which have no dependency
3386                            on pulse for this kind of thing.
3387                         */
3388                         bool use_snap;
3389                         TempoMap& map (_editor->session()->tempo_map());
3390
3391                         pf = adjusted_current_frame (event, false);
3392                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
3393                                 if (_editor->snap_mode() == Editing::SnapOff) {
3394                                         use_snap = true;
3395                                 } else {
3396                                         use_snap = false;
3397                                 }
3398                         } else {
3399                                 if (_editor->snap_mode() == Editing::SnapOff) {
3400                                         use_snap = false;
3401                                 } else {
3402                                         use_snap = true;
3403                                 }
3404                         }
3405
3406                         Timecode::BBT_Time when;
3407                         map.bbt_time (pf, when);
3408
3409                         if (_real_section->position_lock_style() == MusicTime) {
3410
3411                                 const double pulse = map.predict_tempo_pulse (_real_section, pf);
3412                                 when = map.pulse_to_bbt (pulse);
3413                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3414                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3415                                 } else if (use_snap) {
3416                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3417                                 }
3418                                 const double beat = map.bbt_to_beats (when);
3419                                 map.gui_move_tempo_beat (_real_section, beat);
3420                         } else {
3421                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3422                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3423                                 } else if (use_snap) {
3424                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3425                                 }
3426                                 if (use_snap) {
3427                                         pf = map.predict_tempo_frame (_real_section, when);
3428                                 }
3429                                 map.gui_move_tempo_frame (_real_section, pf);
3430                         }
3431                 }
3432
3433                 show_verbose_cursor_time (_real_section->frame());
3434         }
3435         _marker->set_position (pf);
3436 }
3437
3438 void
3439 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3440 {
3441         if (!_real_section->active()) {
3442                 return;
3443         }
3444         if (!movement_occurred) {
3445                 if (was_double_click()) {
3446                         _editor->edit_tempo_marker (*_marker);
3447                 }
3448                 return;
3449         }
3450
3451         TempoMap& map (_editor->session()->tempo_map());
3452
3453         XMLNode &after = map.get_state();
3454         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3455         _editor->commit_reversible_command ();
3456
3457         // delete the dummy marker we used for visual representation while moving.
3458         // a new visual marker will show up automatically.
3459         delete _marker;
3460 }
3461
3462 void
3463 TempoMarkerDrag::aborted (bool moved)
3464 {
3465         _marker->set_position (_marker->tempo().frame());
3466         if (moved) {
3467                 TempoMap& map (_editor->session()->tempo_map());
3468                 map.set_state (*before_state, Stateful::current_state_version);
3469                 // delete the dummy marker we used for visual representation while moving.
3470                 // a new visual marker will show up automatically.
3471                 delete _marker;
3472         }
3473 }
3474
3475 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3476         : Drag (e, i)
3477         , _pulse (0.0)
3478         , _beat (0.0)
3479         , _tempo (0)
3480         , before_state (0)
3481 {
3482         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3483
3484 }
3485
3486 void
3487 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3488 {
3489         Drag::start_grab (event, cursor);
3490
3491         TempoMap& map (_editor->session()->tempo_map());
3492         ostringstream sstr;
3493
3494         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3495         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3496         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3497         show_verbose_cursor_text (sstr.str());
3498         finished (event, false);
3499 }
3500
3501 void
3502 BBTRulerDrag::setup_pointer_frame_offset ()
3503 {
3504         TempoMap& map (_editor->session()->tempo_map());
3505         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3506         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3507         if (divisions > 0) {
3508                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3509         } else {
3510                 /* while it makes some sense for the user to determine the division to 'grab',
3511                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3512                    and the result over steep tempo curves. Use sixteenths.
3513                 */
3514                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3515         }
3516         _pulse = map.pulse_at_beat (_beat);
3517         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3518 }
3519
3520 void
3521 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3522 {
3523         TempoMap& map (_editor->session()->tempo_map());
3524
3525         if (first_move) {
3526                 /* get current state */
3527                 before_state = &map.get_state();
3528                 _editor->begin_reversible_command (_("dilate tempo"));
3529         }
3530
3531         framepos_t const pf = adjusted_current_frame (event, false);
3532
3533         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3534                 /* adjust previous tempo to match pointer frame */
3535                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3536         }
3537         ostringstream sstr;
3538         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3539         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3540         show_verbose_cursor_text (sstr.str());
3541 }
3542
3543 void
3544 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3545 {
3546         if (!movement_occurred) {
3547                 return;
3548         }
3549
3550         TempoMap& map (_editor->session()->tempo_map());
3551
3552         XMLNode &after = map.get_state();
3553         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3554         _editor->commit_reversible_command ();
3555 }
3556
3557 void
3558 BBTRulerDrag::aborted (bool moved)
3559 {
3560         if (moved) {
3561                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3562         }
3563 }
3564
3565
3566 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3567         : Drag (e, &c.track_canvas_item(), false)
3568         , _cursor (c)
3569         , _stop (s)
3570         , _grab_zoom (0.0)
3571 {
3572         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3573 }
3574
3575 /** Do all the things we do when dragging the playhead to make it look as though
3576  *  we have located, without actually doing the locate (because that would cause
3577  *  the diskstream buffers to be refilled, which is too slow).
3578  */
3579 void
3580 CursorDrag::fake_locate (framepos_t t)
3581 {
3582         if (_editor->session () == 0) {
3583                 return;
3584         }
3585
3586         _editor->playhead_cursor->set_position (t);
3587
3588         Session* s = _editor->session ();
3589         if (s->timecode_transmission_suspended ()) {
3590                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3591                 /* This is asynchronous so it will be sent "now"
3592                  */
3593                 s->send_mmc_locate (f);
3594                 /* These are synchronous and will be sent during the next
3595                    process cycle
3596                 */
3597                 s->queue_full_time_code ();
3598                 s->queue_song_position_pointer ();
3599         }
3600
3601         show_verbose_cursor_time (t);
3602         _editor->UpdateAllTransportClocks (t);
3603 }
3604
3605 void
3606 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3607 {
3608         Drag::start_grab (event, c);
3609         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3610
3611         _grab_zoom = _editor->samples_per_pixel;
3612
3613         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3614
3615         _editor->snap_to_with_modifier (where, event);
3616
3617         _editor->_dragging_playhead = true;
3618
3619         Session* s = _editor->session ();
3620
3621         /* grab the track canvas item as well */
3622
3623         _cursor.track_canvas_item().grab();
3624
3625         if (s) {
3626                 if (_was_rolling && _stop) {
3627                         s->request_stop ();
3628                 }
3629
3630                 if (s->is_auditioning()) {
3631                         s->cancel_audition ();
3632                 }
3633
3634
3635                 if (AudioEngine::instance()->connected()) {
3636
3637                         /* do this only if we're the engine is connected
3638                          * because otherwise this request will never be
3639                          * serviced and we'll busy wait forever. likewise,
3640                          * notice if we are disconnected while waiting for the
3641                          * request to be serviced.
3642                          */
3643
3644                         s->request_suspend_timecode_transmission ();
3645                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3646                                 /* twiddle our thumbs */
3647                         }
3648                 }
3649         }
3650
3651         fake_locate (where - snap_delta (event->button.state));
3652 }
3653
3654 void
3655 CursorDrag::motion (GdkEvent* event, bool)
3656 {
3657         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3658         _editor->snap_to_with_modifier (where, event);
3659         if (where != last_pointer_frame()) {
3660                 fake_locate (where - snap_delta (event->button.state));
3661         }
3662 }
3663
3664 void
3665 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3666 {
3667         _editor->_dragging_playhead = false;
3668
3669         _cursor.track_canvas_item().ungrab();
3670
3671         if (!movement_occurred && _stop) {
3672                 return;
3673         }
3674
3675         motion (event, false);
3676
3677         Session* s = _editor->session ();
3678         if (s) {
3679                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3680                 _editor->_pending_locate_request = true;
3681                 s->request_resume_timecode_transmission ();
3682         }
3683 }
3684
3685 void
3686 CursorDrag::aborted (bool)
3687 {
3688         _cursor.track_canvas_item().ungrab();
3689
3690         if (_editor->_dragging_playhead) {
3691                 _editor->session()->request_resume_timecode_transmission ();
3692                 _editor->_dragging_playhead = false;
3693         }
3694
3695         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3696 }
3697
3698 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3699         : RegionDrag (e, i, p, v)
3700 {
3701         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3702 }
3703
3704 void
3705 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3706 {
3707         Drag::start_grab (event, cursor);
3708
3709         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3710         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3711         setup_snap_delta (r->position ());
3712
3713         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3714 }
3715
3716 void
3717 FadeInDrag::setup_pointer_frame_offset ()
3718 {
3719         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3720         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3721         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3722 }
3723
3724 void
3725 FadeInDrag::motion (GdkEvent* event, bool)
3726 {
3727         framecnt_t fade_length;
3728
3729         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3730         _editor->snap_to_with_modifier (pos, event);
3731         pos -= snap_delta (event->button.state);
3732
3733         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3734
3735         if (pos < (region->position() + 64)) {
3736                 fade_length = 64; // this should be a minimum defined somewhere
3737         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3738                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3739         } else {
3740                 fade_length = pos - region->position();
3741         }
3742
3743         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3744
3745                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3746
3747                 if (!tmp) {
3748                         continue;
3749                 }
3750
3751                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3752         }
3753
3754         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3755 }
3756
3757 void
3758 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3759 {
3760         if (!movement_occurred) {
3761                 return;
3762         }
3763
3764         framecnt_t fade_length;
3765         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3766         _editor->snap_to_with_modifier (pos, event);
3767         pos -= snap_delta (event->button.state);
3768
3769         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3770
3771         if (pos < (region->position() + 64)) {
3772                 fade_length = 64; // this should be a minimum defined somewhere
3773         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3774                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3775         } else {
3776                 fade_length = pos - region->position();
3777         }
3778
3779         bool in_command = false;
3780
3781         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3782
3783                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3784
3785                 if (!tmp) {
3786                         continue;
3787                 }
3788
3789                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3790                 XMLNode &before = alist->get_state();
3791
3792                 tmp->audio_region()->set_fade_in_length (fade_length);
3793                 tmp->audio_region()->set_fade_in_active (true);
3794
3795                 if (!in_command) {
3796                         _editor->begin_reversible_command (_("change fade in length"));
3797                         in_command = true;
3798                 }
3799                 XMLNode &after = alist->get_state();
3800                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3801         }
3802
3803         if (in_command) {
3804                 _editor->commit_reversible_command ();
3805         }
3806 }
3807
3808 void
3809 FadeInDrag::aborted (bool)
3810 {
3811         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3812                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3813
3814                 if (!tmp) {
3815                         continue;
3816                 }
3817
3818                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3819         }
3820 }
3821
3822 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3823         : RegionDrag (e, i, p, v)
3824 {
3825         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3826 }
3827
3828 void
3829 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3830 {
3831         Drag::start_grab (event, cursor);
3832
3833         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3834         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3835         setup_snap_delta (r->last_frame ());
3836
3837         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3838 }
3839
3840 void
3841 FadeOutDrag::setup_pointer_frame_offset ()
3842 {
3843         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3844         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3845         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3846 }
3847
3848 void
3849 FadeOutDrag::motion (GdkEvent* event, bool)
3850 {
3851         framecnt_t fade_length;
3852
3853         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3854         _editor->snap_to_with_modifier (pos, event);
3855         pos -= snap_delta (event->button.state);
3856
3857         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3858
3859         if (pos > (region->last_frame() - 64)) {
3860                 fade_length = 64; // this should really be a minimum fade defined somewhere
3861         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3862                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3863         } else {
3864                 fade_length = region->last_frame() - pos;
3865         }
3866
3867         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3868
3869                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3870
3871                 if (!tmp) {
3872                         continue;
3873                 }
3874
3875                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3876         }
3877
3878         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3879 }
3880
3881 void
3882 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3883 {
3884         if (!movement_occurred) {
3885                 return;
3886         }
3887
3888         framecnt_t fade_length;
3889
3890         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3891         _editor->snap_to_with_modifier (pos, event);
3892         pos -= snap_delta (event->button.state);
3893
3894         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3895
3896         if (pos > (region->last_frame() - 64)) {
3897                 fade_length = 64; // this should really be a minimum fade defined somewhere
3898         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3899                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3900         } else {
3901                 fade_length = region->last_frame() - pos;
3902         }
3903
3904         bool in_command = false;
3905
3906         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3907
3908                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3909
3910                 if (!tmp) {
3911                         continue;
3912                 }
3913
3914                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3915                 XMLNode &before = alist->get_state();
3916
3917                 tmp->audio_region()->set_fade_out_length (fade_length);
3918                 tmp->audio_region()->set_fade_out_active (true);
3919
3920                 if (!in_command) {
3921                         _editor->begin_reversible_command (_("change fade out length"));
3922                         in_command = true;
3923                 }
3924                 XMLNode &after = alist->get_state();
3925                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3926         }
3927
3928         if (in_command) {
3929                 _editor->commit_reversible_command ();
3930         }
3931 }
3932
3933 void
3934 FadeOutDrag::aborted (bool)
3935 {
3936         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3937                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3938
3939                 if (!tmp) {
3940                         continue;
3941                 }
3942
3943                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3944         }
3945 }
3946
3947 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3948         : Drag (e, i)
3949         , _selection_changed (false)
3950 {
3951         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3952         Gtk::Window* toplevel = _editor->current_toplevel();
3953         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3954
3955         assert (_marker);
3956
3957         _points.push_back (ArdourCanvas::Duple (0, 0));
3958
3959         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3960 }
3961
3962 MarkerDrag::~MarkerDrag ()
3963 {
3964         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3965                 delete i->location;
3966         }
3967 }
3968
3969 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3970 {
3971         location = new Location (*l);
3972         markers.push_back (m);
3973         move_both = false;
3974 }
3975
3976 void
3977 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3978 {
3979         Drag::start_grab (event, cursor);
3980
3981         bool is_start;
3982
3983         Location *location = _editor->find_location_from_marker (_marker, is_start);
3984         _editor->_dragging_edit_point = true;
3985
3986         update_item (location);
3987
3988         // _drag_line->show();
3989         // _line->raise_to_top();
3990
3991         if (is_start) {
3992                 show_verbose_cursor_time (location->start());
3993         } else {
3994                 show_verbose_cursor_time (location->end());
3995         }
3996         setup_snap_delta (is_start ? location->start() : location->end());
3997
3998         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3999
4000         switch (op) {
4001         case Selection::Toggle:
4002                 /* we toggle on the button release */
4003                 break;
4004         case Selection::Set:
4005                 if (!_editor->selection->selected (_marker)) {
4006                         _editor->selection->set (_marker);
4007                         _selection_changed = true;
4008                 }
4009                 break;
4010         case Selection::Extend:
4011         {
4012                 Locations::LocationList ll;
4013                 list<ArdourMarker*> to_add;
4014                 framepos_t s, e;
4015                 _editor->selection->markers.range (s, e);
4016                 s = min (_marker->position(), s);
4017                 e = max (_marker->position(), e);
4018                 s = min (s, e);
4019                 e = max (s, e);
4020                 if (e < max_framepos) {
4021                         ++e;
4022                 }
4023                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
4024                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
4025                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
4026                         if (lm) {
4027                                 if (lm->start) {
4028                                         to_add.push_back (lm->start);
4029                                 }
4030                                 if (lm->end) {
4031                                         to_add.push_back (lm->end);
4032                                 }
4033                         }
4034                 }
4035                 if (!to_add.empty()) {
4036                         _editor->selection->add (to_add);
4037                         _selection_changed = true;
4038                 }
4039                 break;
4040         }
4041         case Selection::Add:
4042                 _editor->selection->add (_marker);
4043                 _selection_changed = true;
4044
4045                 break;
4046         }
4047
4048         /* Set up copies for us to manipulate during the drag
4049          */
4050
4051         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
4052
4053                 Location* l = _editor->find_location_from_marker (*i, is_start);
4054
4055                 if (!l) {
4056                         continue;
4057                 }
4058
4059                 if (l->is_mark()) {
4060                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4061                 } else {
4062                         /* range: check that the other end of the range isn't
4063                            already there.
4064                         */
4065                         CopiedLocationInfo::iterator x;
4066                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4067                                 if (*(*x).location == *l) {
4068                                         break;
4069                                 }
4070                         }
4071                         if (x == _copied_locations.end()) {
4072                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4073                         } else {
4074                                 (*x).markers.push_back (*i);
4075                                 (*x).move_both = true;
4076                         }
4077                 }
4078
4079         }
4080 }
4081
4082 void
4083 MarkerDrag::setup_pointer_frame_offset ()
4084 {
4085         bool is_start;
4086         Location *location = _editor->find_location_from_marker (_marker, is_start);
4087         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4088 }
4089
4090 void
4091 MarkerDrag::motion (GdkEvent* event, bool)
4092 {
4093         framecnt_t f_delta = 0;
4094         bool is_start;
4095         bool move_both = false;
4096         Location *real_location;
4097         Location *copy_location = 0;
4098         framecnt_t const sd = snap_delta (event->button.state);
4099
4100         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4101         framepos_t next = newframe;
4102
4103         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4104                 move_both = true;
4105         }
4106
4107         CopiedLocationInfo::iterator x;
4108
4109         /* find the marker we're dragging, and compute the delta */
4110
4111         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4112
4113                 copy_location = (*x).location;
4114
4115                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4116
4117                         /* this marker is represented by this
4118                          * CopiedLocationMarkerInfo
4119                          */
4120
4121                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4122                                 /* que pasa ?? */
4123                                 return;
4124                         }
4125
4126                         if (real_location->is_mark()) {
4127                                 f_delta = newframe - copy_location->start();
4128                         } else {
4129
4130
4131                                 switch (_marker->type()) {
4132                                 case ArdourMarker::SessionStart:
4133                                 case ArdourMarker::RangeStart:
4134                                 case ArdourMarker::LoopStart:
4135                                 case ArdourMarker::PunchIn:
4136                                         f_delta = newframe - copy_location->start();
4137                                         break;
4138
4139                                 case ArdourMarker::SessionEnd:
4140                                 case ArdourMarker::RangeEnd:
4141                                 case ArdourMarker::LoopEnd:
4142                                 case ArdourMarker::PunchOut:
4143                                         f_delta = newframe - copy_location->end();
4144                                         break;
4145                                 default:
4146                                         /* what kind of marker is this ? */
4147                                         return;
4148                                 }
4149                         }
4150
4151                         break;
4152                 }
4153         }
4154
4155         if (x == _copied_locations.end()) {
4156                 /* hmm, impossible - we didn't find the dragged marker */
4157                 return;
4158         }
4159
4160         /* now move them all */
4161
4162         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4163
4164                 copy_location = x->location;
4165
4166                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4167                         continue;
4168                 }
4169
4170                 if (real_location->locked()) {
4171                         continue;
4172                 }
4173
4174                 if (copy_location->is_mark()) {
4175
4176                         /* now move it */
4177
4178                         copy_location->set_start (copy_location->start() + f_delta);
4179
4180                 } else {
4181
4182                         framepos_t new_start = copy_location->start() + f_delta;
4183                         framepos_t new_end = copy_location->end() + f_delta;
4184
4185                         if (is_start) { // start-of-range marker
4186
4187                                 if (move_both || (*x).move_both) {
4188                                         copy_location->set_start (new_start);
4189                                         copy_location->set_end (new_end);
4190                                 } else  if (new_start < copy_location->end()) {
4191                                         copy_location->set_start (new_start);
4192                                 } else if (newframe > 0) {
4193                                         //_editor->snap_to (next, RoundUpAlways, true);
4194                                         copy_location->set_end (next);
4195                                         copy_location->set_start (newframe);
4196                                 }
4197
4198                         } else { // end marker
4199
4200                                 if (move_both || (*x).move_both) {
4201                                         copy_location->set_end (new_end);
4202                                         copy_location->set_start (new_start);
4203                                 } else if (new_end > copy_location->start()) {
4204                                         copy_location->set_end (new_end);
4205                                 } else if (newframe > 0) {
4206                                         //_editor->snap_to (next, RoundDownAlways, true);
4207                                         copy_location->set_start (next);
4208                                         copy_location->set_end (newframe);
4209                                 }
4210                         }
4211                 }
4212
4213                 update_item (copy_location);
4214
4215                 /* now lookup the actual GUI items used to display this
4216                  * location and move them to wherever the copy of the location
4217                  * is now. This means that the logic in ARDOUR::Location is
4218                  * still enforced, even though we are not (yet) modifying
4219                  * the real Location itself.
4220                  */
4221
4222                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4223
4224                 if (lm) {
4225                         lm->set_position (copy_location->start(), copy_location->end());
4226                 }
4227
4228         }
4229
4230         assert (!_copied_locations.empty());
4231
4232         show_verbose_cursor_time (newframe);
4233 }
4234
4235 void
4236 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4237 {
4238         if (!movement_occurred) {
4239
4240                 if (was_double_click()) {
4241                         _editor->rename_marker (_marker);
4242                         return;
4243                 }
4244
4245                 /* just a click, do nothing but finish
4246                    off the selection process
4247                 */
4248
4249                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4250                 switch (op) {
4251                 case Selection::Set:
4252                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4253                                 _editor->selection->set (_marker);
4254                                 _selection_changed = true;
4255                         }
4256                         break;
4257
4258                 case Selection::Toggle:
4259                         /* we toggle on the button release, click only */
4260                         _editor->selection->toggle (_marker);
4261                         _selection_changed = true;
4262
4263                         break;
4264
4265                 case Selection::Extend:
4266                 case Selection::Add:
4267                         break;
4268                 }
4269
4270                 if (_selection_changed) {
4271                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4272                         _editor->commit_reversible_selection_op();
4273                 }
4274
4275                 return;
4276         }
4277
4278         _editor->_dragging_edit_point = false;
4279
4280         XMLNode &before = _editor->session()->locations()->get_state();
4281         bool in_command = false;
4282
4283         MarkerSelection::iterator i;
4284         CopiedLocationInfo::iterator x;
4285         bool is_start;
4286
4287         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4288              x != _copied_locations.end() && i != _editor->selection->markers.end();
4289              ++i, ++x) {
4290
4291                 Location * location = _editor->find_location_from_marker (*i, is_start);
4292
4293                 if (location) {
4294
4295                         if (location->locked()) {
4296                                 continue;
4297                         }
4298                         if (!in_command) {
4299                                 _editor->begin_reversible_command ( _("move marker") );
4300                                 in_command = true;
4301                         }
4302                         if (location->is_mark()) {
4303                                 location->set_start (((*x).location)->start());
4304                         } else {
4305                                 location->set (((*x).location)->start(), ((*x).location)->end());
4306                         }
4307                 }
4308         }
4309
4310         if (in_command) {
4311                 XMLNode &after = _editor->session()->locations()->get_state();
4312                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4313                 _editor->commit_reversible_command ();
4314         }
4315 }
4316
4317 void
4318 MarkerDrag::aborted (bool movement_occurred)
4319 {
4320         if (!movement_occurred) {
4321                 return;
4322         }
4323
4324         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4325
4326                 /* move all markers to their original location */
4327
4328
4329                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4330
4331                         bool is_start;
4332                         Location * location = _editor->find_location_from_marker (*m, is_start);
4333
4334                         if (location) {
4335                                 (*m)->set_position (is_start ? location->start() : location->end());
4336                         }
4337                 }
4338         }
4339 }
4340
4341 void
4342 MarkerDrag::update_item (Location*)
4343 {
4344         /* noop */
4345 }
4346
4347 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4348         : Drag (e, i)
4349         , _fixed_grab_x (0.0)
4350         , _fixed_grab_y (0.0)
4351         , _cumulative_x_drag (0.0)
4352         , _cumulative_y_drag (0.0)
4353         , _pushing (false)
4354         , _final_index (0)
4355 {
4356         if (_zero_gain_fraction < 0.0) {
4357                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4358         }
4359
4360         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4361
4362         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4363         assert (_point);
4364 }
4365
4366
4367 void
4368 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4369 {
4370         Drag::start_grab (event, _editor->cursors()->fader);
4371
4372         // start the grab at the center of the control point so
4373         // the point doesn't 'jump' to the mouse after the first drag
4374         _fixed_grab_x = _point->get_x();
4375         _fixed_grab_y = _point->get_y();
4376
4377         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4378         setup_snap_delta (pos);
4379
4380         float const fraction = 1 - (_point->get_y() / _point->line().height());
4381         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4382
4383         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4384
4385         if (!_point->can_slide ()) {
4386                 _x_constrained = true;
4387         }
4388 }
4389
4390 void
4391 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4392 {
4393         double dx = _drags->current_pointer_x() - last_pointer_x();
4394         double dy = current_pointer_y() - last_pointer_y();
4395         bool need_snap = true;
4396
4397         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4398                 dx *= 0.1;
4399                 dy *= 0.1;
4400                 need_snap = false;
4401         }
4402
4403         /* coordinate in pixels relative to the start of the region (for region-based automation)
4404            or track (for track-based automation) */
4405         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4406         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4407
4408         // calculate zero crossing point. back off by .01 to stay on the
4409         // positive side of zero
4410         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4411
4412         if (_x_constrained) {
4413                 cx = _fixed_grab_x;
4414         }
4415         if (_y_constrained) {
4416                 cy = _fixed_grab_y;
4417         }
4418
4419         _cumulative_x_drag = cx - _fixed_grab_x;
4420         _cumulative_y_drag = cy - _fixed_grab_y;
4421
4422         cx = max (0.0, cx);
4423         cy = max (0.0, cy);
4424         cy = min ((double) _point->line().height(), cy);
4425
4426         // make sure we hit zero when passing through
4427         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4428                 cy = zero_gain_y;
4429         }
4430
4431         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4432
4433         if (!_x_constrained && need_snap) {
4434                 _editor->snap_to_with_modifier (cx_frames, event);
4435         }
4436
4437         cx_frames -= snap_delta (event->button.state);
4438         cx_frames = min (cx_frames, _point->line().maximum_time());
4439
4440         float const fraction = 1.0 - (cy / _point->line().height());
4441
4442         if (first_motion) {
4443                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4444                 _editor->begin_reversible_command (_("automation event move"));
4445                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4446         }
4447         pair<double, float> result;
4448         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4449
4450         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4451 }
4452
4453 void
4454 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4455 {
4456         if (!movement_occurred) {
4457
4458                 /* just a click */
4459                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4460                         _editor->reset_point_selection ();
4461                 }
4462
4463         } else {
4464                 _point->line().end_drag (_pushing, _final_index);
4465                 _editor->commit_reversible_command ();
4466         }
4467 }
4468
4469 void
4470 ControlPointDrag::aborted (bool)
4471 {
4472         _point->line().reset ();
4473 }
4474
4475 bool
4476 ControlPointDrag::active (Editing::MouseMode m)
4477 {
4478         if (m == Editing::MouseDraw) {
4479                 /* always active in mouse draw */
4480                 return true;
4481         }
4482
4483         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4484         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4485 }
4486
4487 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4488         : Drag (e, i)
4489         , _line (0)
4490         , _fixed_grab_x (0.0)
4491         , _fixed_grab_y (0.0)
4492         , _cumulative_y_drag (0)
4493         , _before (0)
4494         , _after (0)
4495 {
4496         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4497 }
4498
4499 void
4500 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4501 {
4502         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4503         assert (_line);
4504
4505         _item = &_line->grab_item ();
4506
4507         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4508            origin, and ditto for y.
4509         */
4510
4511         double mx = event->button.x;
4512         double my = event->button.y;
4513
4514         _line->grab_item().canvas_to_item (mx, my);
4515
4516         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4517
4518         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4519                 /* no adjacent points */
4520                 return;
4521         }
4522
4523         Drag::start_grab (event, _editor->cursors()->fader);
4524
4525         /* store grab start in item frame */
4526         double const bx = _line->nth (_before)->get_x();
4527         double const ax = _line->nth (_after)->get_x();
4528         double const click_ratio = (ax - mx) / (ax - bx);
4529
4530         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4531
4532         _fixed_grab_x = mx;
4533         _fixed_grab_y = cy;
4534
4535         double fraction = 1.0 - (cy / _line->height());
4536
4537         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4538 }
4539
4540 void
4541 LineDrag::motion (GdkEvent* event, bool first_move)
4542 {
4543         double dy = current_pointer_y() - last_pointer_y();
4544
4545         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4546                 dy *= 0.1;
4547         }
4548
4549         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4550
4551         _cumulative_y_drag = cy - _fixed_grab_y;
4552
4553         cy = max (0.0, cy);
4554         cy = min ((double) _line->height(), cy);
4555
4556         double const fraction = 1.0 - (cy / _line->height());
4557         uint32_t ignored;
4558
4559         if (first_move) {
4560                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4561
4562                 _editor->begin_reversible_command (_("automation range move"));
4563                 _line->start_drag_line (_before, _after, initial_fraction);
4564         }
4565
4566         /* we are ignoring x position for this drag, so we can just pass in anything */
4567         pair<double, float> result;
4568
4569         result = _line->drag_motion (0, fraction, true, false, ignored);
4570         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4571 }
4572
4573 void
4574 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4575 {
4576         if (movement_occurred) {
4577                 motion (event, false);
4578                 _line->end_drag (false, 0);
4579                 _editor->commit_reversible_command ();
4580         } else {
4581                 /* add a new control point on the line */
4582
4583                 AutomationTimeAxisView* atv;
4584
4585                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4586                         framepos_t where = grab_frame ();
4587
4588                         double cx = 0;
4589                         double cy = _fixed_grab_y;
4590
4591                         _line->grab_item().item_to_canvas (cx, cy);
4592
4593                         atv->add_automation_event (event, where, cy, false);
4594                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4595                         AudioRegionView* arv;
4596
4597                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4598                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4599                         }
4600                 }
4601         }
4602 }
4603
4604 void
4605 LineDrag::aborted (bool)
4606 {
4607         _line->reset ();
4608 }
4609
4610 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4611         : Drag (e, i),
4612           _line (0),
4613           _arv (0),
4614           _region_view_grab_x (0.0),
4615           _cumulative_x_drag (0),
4616           _before (0.0),
4617           _max_x (0)
4618 {
4619         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4620 }
4621
4622 void
4623 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4624 {
4625         Drag::start_grab (event);
4626
4627         _line = reinterpret_cast<Line*> (_item);
4628         assert (_line);
4629
4630         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4631
4632         double cx = event->button.x;
4633         double cy = event->button.y;
4634
4635         _item->parent()->canvas_to_item (cx, cy);
4636
4637         /* store grab start in parent frame */
4638         _region_view_grab_x = cx;
4639
4640         _before = *(float*) _item->get_data ("position");
4641
4642         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4643
4644         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4645 }
4646
4647 void
4648 FeatureLineDrag::motion (GdkEvent*, bool)
4649 {
4650         double dx = _drags->current_pointer_x() - last_pointer_x();
4651
4652         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4653
4654         _cumulative_x_drag += dx;
4655
4656         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4657
4658         if (cx > _max_x){
4659                 cx = _max_x;
4660         }
4661         else if(cx < 0){
4662                 cx = 0;
4663         }
4664
4665         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4666         assert (bbox);
4667         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4668
4669         float *pos = new float;
4670         *pos = cx;
4671
4672         _line->set_data ("position", pos);
4673
4674         _before = cx;
4675 }
4676
4677 void
4678 FeatureLineDrag::finished (GdkEvent*, bool)
4679 {
4680         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4681         _arv->update_transient(_before, _before);
4682 }
4683
4684 void
4685 FeatureLineDrag::aborted (bool)
4686 {
4687         //_line->reset ();
4688 }
4689
4690 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4691         : Drag (e, i)
4692         , _vertical_only (false)
4693 {
4694         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4695 }
4696
4697 void
4698 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4699 {
4700         Drag::start_grab (event);
4701         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4702 }
4703
4704 void
4705 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4706 {
4707         framepos_t start;
4708         framepos_t end;
4709         double y1;
4710         double y2;
4711
4712         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4713
4714         framepos_t grab = grab_frame ();
4715         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4716                 _editor->snap_to_with_modifier (grab, event);
4717         } else {
4718                 grab = raw_grab_frame ();
4719         }
4720
4721         /* base start and end on initial click position */
4722
4723         if (pf < grab) {
4724                 start = pf;
4725                 end = grab;
4726         } else {
4727                 end = pf;
4728                 start = grab;
4729         }
4730
4731         if (current_pointer_y() < grab_y()) {
4732                 y1 = current_pointer_y();
4733                 y2 = grab_y();
4734         } else {
4735                 y2 = current_pointer_y();
4736                 y1 = grab_y();
4737         }
4738
4739         if (start != end || y1 != y2) {
4740
4741                 double x1 = _editor->sample_to_pixel (start);
4742                 double x2 = _editor->sample_to_pixel (end);
4743                 const double min_dimension = 2.0;
4744
4745                 if (_vertical_only) {
4746                         /* fixed 10 pixel width */
4747                         x2 = x1 + 10;
4748                 } else {
4749                         if (x2 < x1) {
4750                                 x2 = min (x1 - min_dimension, x2);
4751                         } else {
4752                                 x2 = max (x1 + min_dimension, x2);
4753                         }
4754                 }
4755
4756                 if (y2 < y1) {
4757                         y2 = min (y1 - min_dimension, y2);
4758                 } else {
4759                         y2 = max (y1 + min_dimension, y2);
4760                 }
4761
4762                 /* translate rect into item space and set */
4763
4764                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4765
4766                 /* this drag is a _trackview_only == true drag, so the y1 and
4767                  * y2 (computed using current_pointer_y() and grab_y()) will be
4768                  * relative to the top of the trackview group). The
4769                  * rubberband rect has the same parent/scroll offset as the
4770                  * the trackview group, so we can use the "r" rect directly
4771                  * to set the shape of the rubberband.
4772                  */
4773
4774                 _editor->rubberband_rect->set (r);
4775                 _editor->rubberband_rect->show();
4776                 _editor->rubberband_rect->raise_to_top();
4777
4778                 show_verbose_cursor_time (pf);
4779
4780                 do_select_things (event, true);
4781         }
4782 }
4783
4784 void
4785 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4786 {
4787         framepos_t x1;
4788         framepos_t x2;
4789         framepos_t grab = grab_frame ();
4790         framepos_t lpf = last_pointer_frame ();
4791
4792         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4793                 grab = raw_grab_frame ();
4794                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4795         }
4796
4797         if (grab < lpf) {
4798                 x1 = grab;
4799                 x2 = lpf;
4800         } else {
4801                 x2 = grab;
4802                 x1 = lpf;
4803         }
4804
4805         double y1;
4806         double y2;
4807
4808         if (current_pointer_y() < grab_y()) {
4809                 y1 = current_pointer_y();
4810                 y2 = grab_y();
4811         } else {
4812                 y2 = current_pointer_y();
4813                 y1 = grab_y();
4814         }
4815
4816         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4817 }
4818
4819 void
4820 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4821 {
4822         if (movement_occurred) {
4823
4824                 motion (event, false);
4825                 do_select_things (event, false);
4826
4827         } else {
4828
4829                 /* just a click */
4830
4831                 bool do_deselect = true;
4832                 MidiTimeAxisView* mtv;
4833
4834                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4835                         /* MIDI track */
4836                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4837                                 /* nothing selected */
4838                                 add_midi_region (mtv, true);
4839                                 do_deselect = false;
4840                         }
4841                 }
4842
4843                 /* do not deselect if Primary or Tertiary (toggle-select or
4844                  * extend-select are pressed.
4845                  */
4846
4847                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4848                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4849                     do_deselect) {
4850                         deselect_things ();
4851                 }
4852
4853         }
4854
4855         _editor->rubberband_rect->hide();
4856 }
4857
4858 void
4859 RubberbandSelectDrag::aborted (bool)
4860 {
4861         _editor->rubberband_rect->hide ();
4862 }
4863
4864 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4865         : RegionDrag (e, i, p, v)
4866 {
4867         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4868 }
4869
4870 void
4871 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4872 {
4873         Drag::start_grab (event, cursor);
4874
4875         _editor->get_selection().add (_primary);
4876
4877         framepos_t where = _primary->region()->position();
4878         setup_snap_delta (where);
4879
4880         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4881 }
4882
4883 void
4884 TimeFXDrag::motion (GdkEvent* event, bool)
4885 {
4886         RegionView* rv = _primary;
4887         StreamView* cv = rv->get_time_axis_view().view ();
4888
4889         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4890         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4891         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4892         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4893         _editor->snap_to_with_modifier (pf, event);
4894         pf -= snap_delta (event->button.state);
4895
4896         if (pf > rv->region()->position()) {
4897                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4898         }
4899
4900         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4901 }
4902
4903 void
4904 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4905 {
4906         /* this may have been a single click, no drag. We still want the dialog
4907            to show up in that case, so that the user can manually edit the
4908            parameters for the timestretch.
4909         */
4910
4911         float fraction = 1.0;
4912
4913         if (movement_occurred) {
4914
4915                 motion (event, false);
4916
4917                 _primary->get_time_axis_view().hide_timestretch ();
4918
4919                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4920
4921                 if (adjusted_frame_pos < _primary->region()->position()) {
4922                         /* backwards drag of the left edge - not usable */
4923                         return;
4924                 }
4925
4926                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4927
4928                 fraction = (double) newlen / (double) _primary->region()->length();
4929
4930 #ifndef USE_RUBBERBAND
4931                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4932                 if (_primary->region()->data_type() == DataType::AUDIO) {
4933                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4934                 }
4935 #endif
4936         }
4937
4938         if (!_editor->get_selection().regions.empty()) {
4939                 /* primary will already be included in the selection, and edit
4940                    group shared editing will propagate selection across
4941                    equivalent regions, so just use the current region
4942                    selection.
4943                 */
4944
4945                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4946                         error << _("An error occurred while executing time stretch operation") << endmsg;
4947                 }
4948         }
4949 }
4950
4951 void
4952 TimeFXDrag::aborted (bool)
4953 {
4954         _primary->get_time_axis_view().hide_timestretch ();
4955 }
4956
4957 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4958         : Drag (e, i)
4959 {
4960         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4961 }
4962
4963 void
4964 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4965 {
4966         Drag::start_grab (event);
4967 }
4968
4969 void
4970 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4971 {
4972         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4973 }
4974
4975 void
4976 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4977 {
4978         if (movement_occurred && _editor->session()) {
4979                 /* make sure we stop */
4980                 _editor->session()->request_transport_speed (0.0);
4981         }
4982 }
4983
4984 void
4985 ScrubDrag::aborted (bool)
4986 {
4987         /* XXX: TODO */
4988 }
4989
4990 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4991         : Drag (e, i)
4992         , _operation (o)
4993         , _add (false)
4994         , _time_selection_at_start (!_editor->get_selection().time.empty())
4995 {
4996         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4997
4998         if (_time_selection_at_start) {
4999                 start_at_start = _editor->get_selection().time.start();
5000                 end_at_start = _editor->get_selection().time.end_frame();
5001         }
5002 }
5003
5004 void
5005 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
5006 {
5007         if (_editor->session() == 0) {
5008                 return;
5009         }
5010
5011         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5012
5013         switch (_operation) {
5014         case CreateSelection:
5015                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5016                         _add = true;
5017                 } else {
5018                         _add = false;
5019                 }
5020                 cursor = _editor->cursors()->selector;
5021                 Drag::start_grab (event, cursor);
5022                 break;
5023
5024         case SelectionStartTrim:
5025                 if (_editor->clicked_axisview) {
5026                         _editor->clicked_axisview->order_selection_trims (_item, true);
5027                 }
5028                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
5029                 break;
5030
5031         case SelectionEndTrim:
5032                 if (_editor->clicked_axisview) {
5033                         _editor->clicked_axisview->order_selection_trims (_item, false);
5034                 }
5035                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
5036                 break;
5037
5038         case SelectionMove:
5039                 Drag::start_grab (event, cursor);
5040                 break;
5041
5042         case SelectionExtend:
5043                 Drag::start_grab (event, cursor);
5044                 break;
5045         }
5046
5047         if (_operation == SelectionMove) {
5048                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
5049         } else {
5050                 show_verbose_cursor_time (adjusted_current_frame (event));
5051         }
5052 }
5053
5054 void
5055 SelectionDrag::setup_pointer_frame_offset ()
5056 {
5057         switch (_operation) {
5058         case CreateSelection:
5059                 _pointer_frame_offset = 0;
5060                 break;
5061
5062         case SelectionStartTrim:
5063         case SelectionMove:
5064                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5065                 break;
5066
5067         case SelectionEndTrim:
5068                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5069                 break;
5070
5071         case SelectionExtend:
5072                 break;
5073         }
5074 }
5075
5076 void
5077 SelectionDrag::motion (GdkEvent* event, bool first_move)
5078 {
5079         framepos_t start = 0;
5080         framepos_t end = 0;
5081         framecnt_t length = 0;
5082         framecnt_t distance = 0;
5083
5084         framepos_t const pending_position = adjusted_current_frame (event);
5085
5086         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5087                 return;
5088         }
5089
5090         switch (_operation) {
5091         case CreateSelection:
5092         {
5093                 framepos_t grab = grab_frame ();
5094
5095                 if (first_move) {
5096                         grab = adjusted_current_frame (event, false);
5097                         if (grab < pending_position) {
5098                                 _editor->snap_to (grab, RoundDownMaybe);
5099                         }  else {
5100                                 _editor->snap_to (grab, RoundUpMaybe);
5101                         }
5102                 }
5103
5104                 if (pending_position < grab) {
5105                         start = pending_position;
5106                         end = grab;
5107                 } else {
5108                         end = pending_position;
5109                         start = grab;
5110                 }
5111
5112                 /* first drag: Either add to the selection
5113                    or create a new selection
5114                 */
5115
5116                 if (first_move) {
5117
5118                         if (_add) {
5119
5120                                 /* adding to the selection */
5121                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5122                                 _editor->clicked_selection = _editor->selection->add (start, end);
5123                                 _add = false;
5124
5125                         } else {
5126
5127                                 /* new selection */
5128
5129                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5130                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5131                                 }
5132
5133                                 _editor->clicked_selection = _editor->selection->set (start, end);
5134                         }
5135                 }
5136
5137                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5138                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5139                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5140                 if (atest) {
5141                         _editor->selection->add (atest);
5142                         break;
5143                 }
5144
5145                 /* select all tracks within the rectangle that we've marked out so far */
5146                 TrackViewList new_selection;
5147                 TrackViewList& all_tracks (_editor->track_views);
5148
5149                 ArdourCanvas::Coord const top = grab_y();
5150                 ArdourCanvas::Coord const bottom = current_pointer_y();
5151
5152                 if (top >= 0 && bottom >= 0) {
5153
5154                         //first, find the tracks that are covered in the y range selection
5155                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5156                                 if ((*i)->covered_by_y_range (top, bottom)) {
5157                                         new_selection.push_back (*i);
5158                                 }
5159                         }
5160
5161                         //now find any tracks that are GROUPED with the tracks we selected
5162                         TrackViewList grouped_add = new_selection;
5163                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5164                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5165                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5166                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5167                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5168                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5169                                                         grouped_add.push_back (*j);
5170                                         }
5171                                 }
5172                         }
5173
5174                         //now compare our list with the current selection, and add or remove as necessary
5175                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5176                         TrackViewList tracks_to_add;
5177                         TrackViewList tracks_to_remove;
5178                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5179                                 if ( !_editor->selection->tracks.contains ( *i ) )
5180                                         tracks_to_add.push_back ( *i );
5181                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5182                                 if ( !grouped_add.contains ( *i ) )
5183                                         tracks_to_remove.push_back ( *i );
5184                         _editor->selection->add(tracks_to_add);
5185                         _editor->selection->remove(tracks_to_remove);
5186
5187                 }
5188         }
5189         break;
5190
5191         case SelectionStartTrim:
5192
5193                 end = _editor->selection->time[_editor->clicked_selection].end;
5194
5195                 if (pending_position > end) {
5196                         start = end;
5197                 } else {
5198                         start = pending_position;
5199                 }
5200                 break;
5201
5202         case SelectionEndTrim:
5203
5204                 start = _editor->selection->time[_editor->clicked_selection].start;
5205
5206                 if (pending_position < start) {
5207                         end = start;
5208                 } else {
5209                         end = pending_position;
5210                 }
5211
5212                 break;
5213
5214         case SelectionMove:
5215
5216                 start = _editor->selection->time[_editor->clicked_selection].start;
5217                 end = _editor->selection->time[_editor->clicked_selection].end;
5218
5219                 length = end - start;
5220                 distance = pending_position - start;
5221                 start = pending_position;
5222                 _editor->snap_to (start);
5223
5224                 end = start + length;
5225
5226                 break;
5227
5228         case SelectionExtend:
5229                 break;
5230         }
5231
5232         if (start != end) {
5233                 switch (_operation) {
5234                 case SelectionMove:
5235                         if (_time_selection_at_start) {
5236                                 _editor->selection->move_time (distance);
5237                         }
5238                         break;
5239                 default:
5240                         _editor->selection->replace (_editor->clicked_selection, start, end);
5241                 }
5242         }
5243
5244         if (_operation == SelectionMove) {
5245                 show_verbose_cursor_time(start);
5246         } else {
5247                 show_verbose_cursor_time(pending_position);
5248         }
5249 }
5250
5251 void
5252 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5253 {
5254         Session* s = _editor->session();
5255
5256         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5257         if (movement_occurred) {
5258                 motion (event, false);
5259                 /* XXX this is not object-oriented programming at all. ick */
5260                 if (_editor->selection->time.consolidate()) {
5261                         _editor->selection->TimeChanged ();
5262                 }
5263
5264                 /* XXX what if its a music time selection? */
5265                 if (s) {
5266                         if (s->get_play_range() && s->transport_rolling()) {
5267                                 s->request_play_range (&_editor->selection->time, true);
5268                         } else if (!s->config.get_external_sync()) {
5269                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5270                                         if (_operation == SelectionEndTrim)
5271                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5272                                         else
5273                                                 s->request_locate (_editor->get_selection().time.start());
5274                                 }
5275                         }
5276
5277                         if (_editor->get_selection().time.length() != 0) {
5278                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5279                         } else {
5280                                 s->clear_range_selection ();
5281                         }
5282                 }
5283
5284         } else {
5285                 /* just a click, no pointer movement.
5286                  */
5287
5288                 if (_operation == SelectionExtend) {
5289                         if (_time_selection_at_start) {
5290                                 framepos_t pos = adjusted_current_frame (event, false);
5291                                 framepos_t start = min (pos, start_at_start);
5292                                 framepos_t end = max (pos, end_at_start);
5293                                 _editor->selection->set (start, end);
5294                         }
5295                 } else {
5296                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5297                                 if (_editor->clicked_selection) {
5298                                         _editor->selection->remove (_editor->clicked_selection);
5299                                 }
5300                         } else {
5301                                 if (!_editor->clicked_selection) {
5302                                         _editor->selection->clear_time();
5303                                 }
5304                         }
5305                 }
5306
5307                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5308                         _editor->selection->set (_editor->clicked_axisview);
5309                 }
5310
5311                 if (s && s->get_play_range () && s->transport_rolling()) {
5312                         s->request_stop (false, false);
5313                 }
5314
5315         }
5316
5317         _editor->stop_canvas_autoscroll ();
5318         _editor->clicked_selection = 0;
5319         _editor->commit_reversible_selection_op ();
5320 }
5321
5322 void
5323 SelectionDrag::aborted (bool)
5324 {
5325         /* XXX: TODO */
5326 }
5327
5328 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5329         : Drag (e, i, false),
5330           _operation (o),
5331           _copy (false)
5332 {
5333         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5334
5335         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5336                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5337                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5338         _drag_rect->hide ();
5339
5340         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5341         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5342 }
5343
5344 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5345 {
5346         /* normal canvas items will be cleaned up when their parent group is deleted. But
5347            this item is created as the child of a long-lived parent group, and so we
5348            need to explicitly delete it.
5349         */
5350         delete _drag_rect;
5351 }
5352
5353 void
5354 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5355 {
5356         if (_editor->session() == 0) {
5357                 return;
5358         }
5359
5360         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5361
5362         if (!_editor->temp_location) {
5363                 _editor->temp_location = new Location (*_editor->session());
5364         }
5365
5366         switch (_operation) {
5367         case CreateSkipMarker:
5368         case CreateRangeMarker:
5369         case CreateTransportMarker:
5370         case CreateCDMarker:
5371
5372                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5373                         _copy = true;
5374                 } else {
5375                         _copy = false;
5376                 }
5377                 cursor = _editor->cursors()->selector;
5378                 break;
5379         }
5380
5381         Drag::start_grab (event, cursor);
5382
5383         show_verbose_cursor_time (adjusted_current_frame (event));
5384 }
5385
5386 void
5387 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5388 {
5389         framepos_t start = 0;
5390         framepos_t end = 0;
5391         ArdourCanvas::Rectangle *crect;
5392
5393         switch (_operation) {
5394         case CreateSkipMarker:
5395                 crect = _editor->range_bar_drag_rect;
5396                 break;
5397         case CreateRangeMarker:
5398                 crect = _editor->range_bar_drag_rect;
5399                 break;
5400         case CreateTransportMarker:
5401                 crect = _editor->transport_bar_drag_rect;
5402                 break;
5403         case CreateCDMarker:
5404                 crect = _editor->cd_marker_bar_drag_rect;
5405                 break;
5406         default:
5407                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5408                 return;
5409                 break;
5410         }
5411
5412         framepos_t const pf = adjusted_current_frame (event);
5413
5414         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5415                 framepos_t grab = grab_frame ();
5416                 _editor->snap_to (grab);
5417
5418                 if (pf < grab_frame()) {
5419                         start = pf;
5420                         end = grab;
5421                 } else {
5422                         end = pf;
5423                         start = grab;
5424                 }
5425
5426                 /* first drag: Either add to the selection
5427                    or create a new selection.
5428                 */
5429
5430                 if (first_move) {
5431
5432                         _editor->temp_location->set (start, end);
5433
5434                         crect->show ();
5435
5436                         update_item (_editor->temp_location);
5437                         _drag_rect->show();
5438                         //_drag_rect->raise_to_top();
5439
5440                 }
5441         }
5442
5443         if (start != end) {
5444                 _editor->temp_location->set (start, end);
5445
5446                 double x1 = _editor->sample_to_pixel (start);
5447                 double x2 = _editor->sample_to_pixel (end);
5448                 crect->set_x0 (x1);
5449                 crect->set_x1 (x2);
5450
5451                 update_item (_editor->temp_location);
5452         }
5453
5454         show_verbose_cursor_time (pf);
5455
5456 }
5457
5458 void
5459 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5460 {
5461         Location * newloc = 0;
5462         string rangename;
5463         int flags;
5464
5465         if (movement_occurred) {
5466                 motion (event, false);
5467                 _drag_rect->hide();
5468
5469                 switch (_operation) {
5470                 case CreateSkipMarker:
5471                 case CreateRangeMarker:
5472                 case CreateCDMarker:
5473                     {
5474                         XMLNode &before = _editor->session()->locations()->get_state();
5475                         if (_operation == CreateSkipMarker) {
5476                                 _editor->begin_reversible_command (_("new skip marker"));
5477                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5478                                 flags = Location::IsRangeMarker | Location::IsSkip;
5479                                 _editor->range_bar_drag_rect->hide();
5480                         } else if (_operation == CreateCDMarker) {
5481                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5482                                 _editor->begin_reversible_command (_("new CD marker"));
5483                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5484                                 _editor->cd_marker_bar_drag_rect->hide();
5485                         } else {
5486                                 _editor->begin_reversible_command (_("new skip marker"));
5487                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5488                                 flags = Location::IsRangeMarker;
5489                                 _editor->range_bar_drag_rect->hide();
5490                         }
5491                         newloc = new Location (
5492                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5493                                 );
5494
5495                         _editor->session()->locations()->add (newloc, true);
5496                         XMLNode &after = _editor->session()->locations()->get_state();
5497                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5498                         _editor->commit_reversible_command ();
5499                         break;
5500                     }
5501
5502                 case CreateTransportMarker:
5503                         // popup menu to pick loop or punch
5504                         _editor->new_transport_marker_context_menu (&event->button, _item);
5505                         break;
5506                 }
5507
5508         } else {
5509
5510                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5511
5512                 if (_operation == CreateTransportMarker) {
5513
5514                         /* didn't drag, so just locate */
5515
5516                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5517
5518                 } else if (_operation == CreateCDMarker) {
5519
5520                         /* didn't drag, but mark is already created so do
5521                          * nothing */
5522
5523                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5524
5525                         framepos_t start;
5526                         framepos_t end;
5527
5528                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5529
5530                         if (end == max_framepos) {
5531                                 end = _editor->session()->current_end_frame ();
5532                         }
5533
5534                         if (start == max_framepos) {
5535                                 start = _editor->session()->current_start_frame ();
5536                         }
5537
5538                         switch (_editor->mouse_mode) {
5539                         case MouseObject:
5540                                 /* find the two markers on either side and then make the selection from it */
5541                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5542                                 break;
5543
5544                         case MouseRange:
5545                                 /* find the two markers on either side of the click and make the range out of it */
5546                                 _editor->selection->set (start, end);
5547                                 break;
5548
5549                         default:
5550                                 break;
5551                         }
5552                 }
5553         }
5554
5555         _editor->stop_canvas_autoscroll ();
5556 }
5557
5558 void
5559 RangeMarkerBarDrag::aborted (bool movement_occurred)
5560 {
5561         if (movement_occurred) {
5562                 _drag_rect->hide ();
5563         }
5564 }
5565
5566 void
5567 RangeMarkerBarDrag::update_item (Location* location)
5568 {
5569         double const x1 = _editor->sample_to_pixel (location->start());
5570         double const x2 = _editor->sample_to_pixel (location->end());
5571
5572         _drag_rect->set_x0 (x1);
5573         _drag_rect->set_x1 (x2);
5574 }
5575
5576 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5577         : Drag (e, i)
5578         , _cumulative_dx (0)
5579         , _cumulative_dy (0)
5580         , _was_selected (false)
5581 {
5582         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5583
5584         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5585         assert (_primary);
5586         _region = &_primary->region_view ();
5587         _note_height = _region->midi_stream_view()->note_height ();
5588 }
5589
5590 void
5591 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5592 {
5593         Drag::start_grab (event);
5594         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5595
5596         if (!(_was_selected = _primary->selected())) {
5597
5598                 /* tertiary-click means extend selection - we'll do that on button release,
5599                    so don't add it here, because otherwise we make it hard to figure
5600                    out the "extend-to" range.
5601                 */
5602
5603                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5604
5605                 if (!extend) {
5606                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5607
5608                         if (add) {
5609                                 _region->note_selected (_primary, true);
5610                         } else {
5611                                 _editor->get_selection().clear_points();
5612                                 _region->unique_select (_primary);
5613                         }
5614                 }
5615         }
5616 }
5617
5618 /** @return Current total drag x change in frames */
5619 frameoffset_t
5620 NoteDrag::total_dx (const guint state) const
5621 {
5622         /* dx in frames */
5623         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5624
5625         /* primary note time */
5626         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5627
5628         /* new time of the primary note in session frames */
5629         frameoffset_t st = n + dx + snap_delta (state);
5630
5631         framepos_t const rp = _region->region()->position ();
5632
5633         /* prevent the note being dragged earlier than the region's position */
5634         st = max (st, rp);
5635
5636         /* possibly snap and return corresponding delta */
5637
5638         bool snap = true;
5639
5640         if (ArdourKeyboard::indicates_snap (state)) {
5641                 if (_editor->snap_mode () != SnapOff) {
5642                         snap = false;
5643                 }
5644         } else {
5645                 if (_editor->snap_mode () == SnapOff) {
5646                         snap = false;
5647                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5648                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5649                                 snap = true;
5650                         }
5651                 }
5652         }
5653
5654         frameoffset_t ret;
5655         if (snap) {
5656                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5657                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5658         } else {
5659                 ret = st - n - snap_delta (state);
5660         }
5661         return ret;
5662 }
5663
5664 /** @return Current total drag y change in note number */
5665 int8_t
5666 NoteDrag::total_dy () const
5667 {
5668         MidiStreamView* msv = _region->midi_stream_view ();
5669         double const y = _region->midi_view()->y_position ();
5670         /* new current note */
5671         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5672         /* clamp */
5673         n = max (msv->lowest_note(), n);
5674         n = min (msv->highest_note(), n);
5675         /* and work out delta */
5676         return n - msv->y_to_note (grab_y() - y);
5677 }
5678
5679 void
5680 NoteDrag::motion (GdkEvent * event, bool)
5681 {
5682         /* Total change in x and y since the start of the drag */
5683         frameoffset_t const dx = total_dx (event->button.state);
5684         int8_t const dy = total_dy ();
5685
5686         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5687         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5688         double const tdy = -dy * _note_height - _cumulative_dy;
5689
5690         if (tdx || tdy) {
5691                 _cumulative_dx += tdx;
5692                 _cumulative_dy += tdy;
5693
5694                 int8_t note_delta = total_dy();
5695
5696                 _region->move_selection (tdx, tdy, note_delta);
5697
5698                 /* the new note value may be the same as the old one, but we
5699                  * don't know what that means because the selection may have
5700                  * involved more than one note and we might be doing something
5701                  * odd with them. so show the note value anyway, always.
5702                  */
5703
5704                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5705
5706                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5707         }
5708 }
5709
5710 void
5711 NoteDrag::finished (GdkEvent* ev, bool moved)
5712 {
5713         if (!moved) {
5714                 /* no motion - select note */
5715
5716                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5717                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5718
5719                         bool changed = false;
5720
5721                         if (_was_selected) {
5722                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5723                                 if (add) {
5724                                         _region->note_deselected (_primary);
5725                                         changed = true;
5726                                 } else {
5727                                         _editor->get_selection().clear_points();
5728                                         _region->unique_select (_primary);
5729                                         changed = true;
5730                                 }
5731                         } else {
5732                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5733                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5734
5735                                 if (!extend && !add && _region->selection_size() > 1) {
5736                                         _editor->get_selection().clear_points();
5737                                         _region->unique_select (_primary);
5738                                         changed = true;
5739                                 } else if (extend) {
5740                                         _region->note_selected (_primary, true, true);
5741                                         changed = true;
5742                                 } else {
5743                                         /* it was added during button press */
5744                                         changed = true;
5745
5746                                 }
5747                         }
5748
5749                         if (changed) {
5750                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5751                                 _editor->commit_reversible_selection_op();
5752                         }
5753                 }
5754         } else {
5755                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5756         }
5757 }
5758
5759 void
5760 NoteDrag::aborted (bool)
5761 {
5762         /* XXX: TODO */
5763 }
5764
5765 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5766 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5767         : Drag (editor, atv->base_item ())
5768         , _ranges (r)
5769         , _y_origin (atv->y_position())
5770         , _nothing_to_drag (false)
5771 {
5772         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5773         setup (atv->lines ());
5774 }
5775
5776 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5777 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5778         : Drag (editor, rv->get_canvas_group ())
5779         , _ranges (r)
5780         , _y_origin (rv->get_time_axis_view().y_position())
5781         , _nothing_to_drag (false)
5782         , _integral (false)
5783 {
5784         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5785
5786         list<boost::shared_ptr<AutomationLine> > lines;
5787
5788         AudioRegionView*      audio_view;
5789         AutomationRegionView* automation_view;
5790         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5791                 lines.push_back (audio_view->get_gain_line ());
5792         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5793                 lines.push_back (automation_view->line ());
5794                 _integral = true;
5795         } else {
5796                 error << _("Automation range drag created for invalid region type") << endmsg;
5797         }
5798
5799         setup (lines);
5800 }
5801
5802 /** @param lines AutomationLines to drag.
5803  *  @param offset Offset from the session start to the points in the AutomationLines.
5804  */
5805 void
5806 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5807 {
5808         /* find the lines that overlap the ranges being dragged */
5809         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5810         while (i != lines.end ()) {
5811                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5812                 ++j;
5813
5814                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5815
5816                 /* check this range against all the AudioRanges that we are using */
5817                 list<AudioRange>::const_iterator k = _ranges.begin ();
5818                 while (k != _ranges.end()) {
5819                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5820                                 break;
5821                         }
5822                         ++k;
5823                 }
5824
5825                 /* add it to our list if it overlaps at all */
5826                 if (k != _ranges.end()) {
5827                         Line n;
5828                         n.line = *i;
5829                         n.state = 0;
5830                         n.range = r;
5831                         _lines.push_back (n);
5832                 }
5833
5834                 i = j;
5835         }
5836
5837         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5838 }
5839
5840 double
5841 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5842 {
5843         return 1.0 - ((global_y - _y_origin) / line->height());
5844 }
5845
5846 double
5847 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5848 {
5849         const double v = list->eval(x);
5850         return _integral ? rint(v) : v;
5851 }
5852
5853 void
5854 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5855 {
5856         Drag::start_grab (event, cursor);
5857
5858         /* Get line states before we start changing things */
5859         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5860                 i->state = &i->line->get_state ();
5861                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5862         }
5863
5864         if (_ranges.empty()) {
5865
5866                 /* No selected time ranges: drag all points */
5867                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5868                         uint32_t const N = i->line->npoints ();
5869                         for (uint32_t j = 0; j < N; ++j) {
5870                                 i->points.push_back (i->line->nth (j));
5871                         }
5872                 }
5873
5874         }
5875
5876         if (_nothing_to_drag) {
5877                 return;
5878         }
5879 }
5880
5881 void
5882 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5883 {
5884         if (_nothing_to_drag && !first_move) {
5885                 return;
5886         }
5887
5888         if (first_move) {
5889                 _editor->begin_reversible_command (_("automation range move"));
5890
5891                 if (!_ranges.empty()) {
5892
5893                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5894
5895                                 framecnt_t const half = (i->start + i->end) / 2;
5896
5897                                 /* find the line that this audio range starts in */
5898                                 list<Line>::iterator j = _lines.begin();
5899                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5900                                         ++j;
5901                                 }
5902
5903                                 if (j != _lines.end()) {
5904                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5905
5906                                 /* j is the line that this audio range starts in; fade into it;
5907                                    64 samples length plucked out of thin air.
5908                                 */
5909
5910                                         framepos_t a = i->start + 64;
5911                                         if (a > half) {
5912                                                 a = half;
5913                                         }
5914
5915                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5916                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5917
5918                                         XMLNode &before = the_list->get_state();
5919                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5920                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5921
5922                                         if (add_p || add_q) {
5923                                                 _editor->session()->add_command (
5924                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5925                                         }
5926                                 }
5927
5928                                 /* same thing for the end */
5929
5930                                 j = _lines.begin();
5931                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5932                                         ++j;
5933                                 }
5934
5935                                 if (j != _lines.end()) {
5936                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5937
5938                                         /* j is the line that this audio range starts in; fade out of it;
5939                                            64 samples length plucked out of thin air.
5940                                         */
5941
5942                                         framepos_t b = i->end - 64;
5943                                         if (b < half) {
5944                                                 b = half;
5945                                         }
5946
5947                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5948                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5949
5950                                         XMLNode &before = the_list->get_state();
5951                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5952                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5953
5954                                         if (add_p || add_q) {
5955                                                 _editor->session()->add_command (
5956                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5957                                         }
5958                                 }
5959                         }
5960
5961                         _nothing_to_drag = true;
5962
5963                         /* Find all the points that should be dragged and put them in the relevant
5964                            points lists in the Line structs.
5965                         */
5966
5967                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5968
5969                                 uint32_t const N = i->line->npoints ();
5970                                 for (uint32_t j = 0; j < N; ++j) {
5971
5972                                         /* here's a control point on this line */
5973                                         ControlPoint* p = i->line->nth (j);
5974                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5975
5976                                         /* see if it's inside a range */
5977                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5978                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5979                                                 ++k;
5980                                         }
5981
5982                                         if (k != _ranges.end()) {
5983                                                 /* dragging this point */
5984                                                 _nothing_to_drag = false;
5985                                                 i->points.push_back (p);
5986                                         }
5987                                 }
5988                         }
5989                 }
5990
5991                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5992                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5993                 }
5994         }
5995
5996         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5997                 float const f = y_fraction (l->line, current_pointer_y());
5998                 /* we are ignoring x position for this drag, so we can just pass in anything */
5999                 pair<double, float> result;
6000                 uint32_t ignored;
6001                 result = l->line->drag_motion (0, f, true, false, ignored);
6002                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
6003         }
6004 }
6005
6006 void
6007 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
6008 {
6009         if (_nothing_to_drag || !motion_occurred) {
6010                 return;
6011         }
6012
6013         motion (event, false);
6014         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6015                 i->line->end_drag (false, 0);
6016         }
6017
6018         _editor->commit_reversible_command ();
6019 }
6020
6021 void
6022 AutomationRangeDrag::aborted (bool)
6023 {
6024         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6025                 i->line->reset ();
6026         }
6027 }
6028
6029 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
6030         : view (v)
6031         , initial_time_axis_view (itav)
6032 {
6033         /* note that time_axis_view may be null if the regionview was created
6034          * as part of a copy operation.
6035          */
6036         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
6037         layer = v->region()->layer ();
6038         initial_y = v->get_canvas_group()->position().y;
6039         initial_playlist = v->region()->playlist ();
6040         initial_position = v->region()->position ();
6041         initial_end = v->region()->position () + v->region()->length ();
6042 }
6043
6044 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
6045         : Drag (e, i->canvas_item ())
6046         , _region_view (r)
6047         , _patch_change (i)
6048         , _cumulative_dx (0)
6049 {
6050         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
6051                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
6052                                                    grab_frame()));
6053 }
6054
6055 void
6056 PatchChangeDrag::motion (GdkEvent* ev, bool)
6057 {
6058         framepos_t f = adjusted_current_frame (ev);
6059         boost::shared_ptr<Region> r = _region_view->region ();
6060         f = max (f, r->position ());
6061         f = min (f, r->last_frame ());
6062
6063         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6064         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6065         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6066         _cumulative_dx = dxu;
6067 }
6068
6069 void
6070 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6071 {
6072         if (!movement_occurred) {
6073                 return;
6074         }
6075
6076         boost::shared_ptr<Region> r (_region_view->region ());
6077         framepos_t f = adjusted_current_frame (ev);
6078         f = max (f, r->position ());
6079         f = min (f, r->last_frame ());
6080
6081         _region_view->move_patch_change (
6082                 *_patch_change,
6083                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6084                 );
6085 }
6086
6087 void
6088 PatchChangeDrag::aborted (bool)
6089 {
6090         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6091 }
6092
6093 void
6094 PatchChangeDrag::setup_pointer_frame_offset ()
6095 {
6096         boost::shared_ptr<Region> region = _region_view->region ();
6097         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6098 }
6099
6100 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6101         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6102         , _region_view (rv)
6103 {
6104
6105 }
6106
6107 void
6108 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6109 {
6110         _region_view->update_drag_selection (
6111                 x1, x2, y1, y2,
6112                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6113 }
6114
6115 void
6116 MidiRubberbandSelectDrag::deselect_things ()
6117 {
6118         /* XXX */
6119 }
6120
6121 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6122         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6123         , _region_view (rv)
6124 {
6125         _vertical_only = true;
6126 }
6127
6128 void
6129 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6130 {
6131         double const y = _region_view->midi_view()->y_position ();
6132
6133         y1 = max (0.0, y1 - y);
6134         y2 = max (0.0, y2 - y);
6135
6136         _region_view->update_vertical_drag_selection (
6137                 y1,
6138                 y2,
6139                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6140                 );
6141 }
6142
6143 void
6144 MidiVerticalSelectDrag::deselect_things ()
6145 {
6146         /* XXX */
6147 }
6148
6149 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6150         : RubberbandSelectDrag (e, i)
6151 {
6152
6153 }
6154
6155 void
6156 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6157 {
6158         if (drag_in_progress) {
6159                 /* We just want to select things at the end of the drag, not during it */
6160                 return;
6161         }
6162
6163         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6164
6165         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6166
6167         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6168
6169         _editor->commit_reversible_selection_op ();
6170 }
6171
6172 void
6173 EditorRubberbandSelectDrag::deselect_things ()
6174 {
6175         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6176
6177         _editor->selection->clear_tracks();
6178         _editor->selection->clear_regions();
6179         _editor->selection->clear_points ();
6180         _editor->selection->clear_lines ();
6181         _editor->selection->clear_midi_notes ();
6182
6183         _editor->commit_reversible_selection_op();
6184 }
6185
6186 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6187         : Drag (e, i)
6188         , _region_view (rv)
6189         , _drag_rect (0)
6190 {
6191         _note[0] = _note[1] = 0;
6192 }
6193
6194 NoteCreateDrag::~NoteCreateDrag ()
6195 {
6196         delete _drag_rect;
6197 }
6198
6199 framecnt_t
6200 NoteCreateDrag::grid_frames (framepos_t t) const
6201 {
6202         bool success;
6203         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6204         if (!success) {
6205                 grid_beats = Evoral::Beats(1);
6206         }
6207
6208         return _region_view->region_beats_to_region_frames (grid_beats);
6209 }
6210
6211 void
6212 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6213 {
6214         Drag::start_grab (event, cursor);
6215
6216         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6217
6218         framepos_t pf = _drags->current_pointer_frame ();
6219         framecnt_t const g = grid_frames (pf);
6220
6221         /* Hack so that we always snap to the note that we are over, instead of snapping
6222            to the next one if we're more than halfway through the one we're over.
6223         */
6224         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6225                 pf -= g / 2;
6226         }
6227
6228         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6229         _note[1] = _note[0];
6230
6231         MidiStreamView* sv = _region_view->midi_stream_view ();
6232         double const x = _editor->sample_to_pixel (_note[0]);
6233         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6234
6235         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6236         _drag_rect->set_outline_all ();
6237         _drag_rect->set_outline_color (0xffffff99);
6238         _drag_rect->set_fill_color (0xffffff66);
6239 }
6240
6241 void
6242 NoteCreateDrag::motion (GdkEvent* event, bool)
6243 {
6244         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6245         double const x0 = _editor->sample_to_pixel (_note[0]);
6246         double const x1 = _editor->sample_to_pixel (_note[1]);
6247         _drag_rect->set_x0 (std::min(x0, x1));
6248         _drag_rect->set_x1 (std::max(x0, x1));
6249 }
6250
6251 void
6252 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6253 {
6254         if (!had_movement) {
6255                 return;
6256         }
6257
6258         framepos_t const start = min (_note[0], _note[1]);
6259         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6260
6261         framecnt_t const g = grid_frames (start);
6262         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6263
6264         if (_editor->snap_mode() == SnapNormal && length < g) {
6265                 length = g;
6266         }
6267
6268         Evoral::Beats length_beats = max (
6269                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6270
6271         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6272 }
6273
6274 double
6275 NoteCreateDrag::y_to_region (double y) const
6276 {
6277         double x = 0;
6278         _region_view->get_canvas_group()->canvas_to_item (x, y);
6279         return y;
6280 }
6281
6282 void
6283 NoteCreateDrag::aborted (bool)
6284 {
6285
6286 }
6287
6288 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6289         : Drag (e, i)
6290         , arv (rv)
6291         , start (start_yn)
6292 {
6293         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6294 }
6295
6296 void
6297 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6298 {
6299         Drag::start_grab (event, cursor);
6300 }
6301
6302 void
6303 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6304 {
6305         double distance;
6306         double new_length;
6307         framecnt_t len;
6308
6309         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6310
6311         if (start) {
6312                 distance = _drags->current_pointer_x() - grab_x();
6313                 len = ar->fade_in()->back()->when;
6314         } else {
6315                 distance = grab_x() - _drags->current_pointer_x();
6316                 len = ar->fade_out()->back()->when;
6317         }
6318
6319         /* how long should it be ? */
6320
6321         new_length = len + _editor->pixel_to_sample (distance);
6322
6323         /* now check with the region that this is legal */
6324
6325         new_length = ar->verify_xfade_bounds (new_length, start);
6326
6327         if (start) {
6328                 arv->reset_fade_in_shape_width (ar, new_length);
6329         } else {
6330                 arv->reset_fade_out_shape_width (ar, new_length);
6331         }
6332 }
6333
6334 void
6335 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6336 {
6337         double distance;
6338         double new_length;
6339         framecnt_t len;
6340
6341         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6342
6343         if (start) {
6344                 distance = _drags->current_pointer_x() - grab_x();
6345                 len = ar->fade_in()->back()->when;
6346         } else {
6347                 distance = grab_x() - _drags->current_pointer_x();
6348                 len = ar->fade_out()->back()->when;
6349         }
6350
6351         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6352
6353         _editor->begin_reversible_command ("xfade trim");
6354         ar->playlist()->clear_owned_changes ();
6355
6356         if (start) {
6357                 ar->set_fade_in_length (new_length);
6358         } else {
6359                 ar->set_fade_out_length (new_length);
6360         }
6361
6362         /* Adjusting the xfade may affect other regions in the playlist, so we need
6363            to get undo Commands from the whole playlist rather than just the
6364            region.
6365         */
6366
6367         vector<Command*> cmds;
6368         ar->playlist()->rdiff (cmds);
6369         _editor->session()->add_commands (cmds);
6370         _editor->commit_reversible_command ();
6371
6372 }
6373
6374 void
6375 CrossfadeEdgeDrag::aborted (bool)
6376 {
6377         if (start) {
6378                 // arv->redraw_start_xfade ();
6379         } else {
6380                 // arv->redraw_end_xfade ();
6381         }
6382 }
6383
6384 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6385         : Drag (e, item, true)
6386         , line (new EditorCursor (*e))
6387 {
6388         line->set_position (pos);
6389         line->show ();
6390 }
6391
6392 RegionCutDrag::~RegionCutDrag ()
6393 {
6394         delete line;
6395 }
6396
6397 void
6398 RegionCutDrag::motion (GdkEvent*, bool)
6399 {
6400         framepos_t where = _drags->current_pointer_frame();
6401         _editor->snap_to (where);
6402
6403         line->set_position (where);
6404 }
6405
6406 void
6407 RegionCutDrag::finished (GdkEvent*, bool)
6408 {
6409         _editor->get_track_canvas()->canvas()->re_enter();
6410
6411         framepos_t pos = _drags->current_pointer_frame();
6412
6413         line->hide ();
6414
6415         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6416
6417         if (rs.empty()) {
6418                 return;
6419         }
6420
6421         _editor->split_regions_at (pos, rs);
6422 }
6423
6424 void
6425 RegionCutDrag::aborted (bool)
6426 {
6427 }