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 (first_move) {
3146
3147                 // create a dummy marker to catch events, then hide it.
3148
3149                 char name[64];
3150                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3151
3152                 _marker = new MeterMarker (
3153                         *_editor,
3154                         *_editor->meter_group,
3155                         UIConfiguration::instance().color ("meter marker"),
3156                         name,
3157                         *new MeterSection (_marker->meter())
3158                 );
3159
3160                 /* use the new marker for the grab */
3161                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3162                 _marker->hide();
3163
3164                 TempoMap& map (_editor->session()->tempo_map());
3165                 /* get current state */
3166                 before_state = &map.get_state();
3167
3168                 if (!_copy) {
3169                         _editor->begin_reversible_command (_("move meter mark"));
3170                 } else {
3171                         _editor->begin_reversible_command (_("copy meter mark"));
3172
3173                         Timecode::BBT_Time bbt = _real_section->bbt();
3174
3175                         /* we can't add a meter where one currently exists */
3176                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3177                                 ++bbt.bars;
3178                         } else {
3179                                 --bbt.bars;
3180                         }
3181                         const double beat = map.beat_at_bbt (bbt);
3182                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3183                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3184
3185                 }
3186         }
3187
3188         framepos_t pf = adjusted_current_frame (event);
3189
3190         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3191                 /* never snap to music for audio locked */
3192                 pf = adjusted_current_frame (event, false);
3193         }
3194
3195         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3196
3197         setup_pointer_frame_offset ();
3198         _marker->set_position (pf);
3199         show_verbose_cursor_time (_real_section->frame());
3200 }
3201
3202 void
3203 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3204 {
3205         if (!movement_occurred) {
3206                 if (was_double_click()) {
3207                         _editor->edit_meter_marker (*_marker);
3208                 }
3209                 return;
3210         }
3211
3212         TempoMap& map (_editor->session()->tempo_map());
3213
3214         XMLNode &after = map.get_state();
3215         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3216         _editor->commit_reversible_command ();
3217
3218         // delete the dummy marker we used for visual representation while moving.
3219         // a new visual marker will show up automatically.
3220         delete _marker;
3221 }
3222
3223 void
3224 MeterMarkerDrag::aborted (bool moved)
3225 {
3226         _marker->set_position (_marker->meter().frame ());
3227         if (moved) {
3228                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3229                 // delete the dummy marker we used for visual representation while moving.
3230                 // a new visual marker will show up automatically.
3231                 delete _marker;
3232         }
3233 }
3234
3235 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3236         : Drag (e, i)
3237         , _copy (c)
3238         , before_state (0)
3239 {
3240         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3241
3242         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3243         _real_section = &_marker->tempo();
3244         _movable = _real_section->movable();
3245         assert (_marker);
3246 }
3247
3248 void
3249 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3250 {
3251         Drag::start_grab (event, cursor);
3252         if (!_real_section->active()) {
3253                 show_verbose_cursor_text (_("inactive"));
3254         } else {
3255                 show_verbose_cursor_time (adjusted_current_frame (event));
3256         }
3257 }
3258
3259 void
3260 TempoMarkerDrag::setup_pointer_frame_offset ()
3261 {
3262         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3263 }
3264
3265 void
3266 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3267 {
3268         if (!_real_section->active()) {
3269                 return;
3270         }
3271
3272         if (first_move) {
3273
3274                 // mvc drag - create a dummy marker to catch events, hide it.
3275
3276                 char name[64];
3277                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3278
3279                 TempoSection section (_marker->tempo());
3280
3281                 _marker = new TempoMarker (
3282                         *_editor,
3283                         *_editor->tempo_group,
3284                         UIConfiguration::instance().color ("tempo marker"),
3285                         name,
3286                         *new TempoSection (_marker->tempo())
3287                         );
3288
3289                 /* use the new marker for the grab */
3290                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3291                 _marker->hide();
3292
3293                 TempoMap& map (_editor->session()->tempo_map());
3294                 /* get current state */
3295                 before_state = &map.get_state();
3296
3297                 if (!_copy) {
3298                         _editor->begin_reversible_command (_("move tempo mark"));
3299
3300                 } else {
3301                         const framepos_t frame = adjusted_current_frame (event) + 1;
3302
3303                         _editor->begin_reversible_command (_("copy tempo mark"));
3304
3305                         if (_real_section->position_lock_style() == MusicTime) {
3306                                 _real_section = map.add_tempo (_marker->tempo(), map.pulse_at_frame (frame), 0, _real_section->type(), MusicTime);
3307                         } else {
3308                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3309                         }
3310                 }
3311
3312         }
3313
3314         framepos_t pf;
3315
3316         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3317                 /* use vertical movement to alter tempo .. should be log */
3318                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3319                 stringstream strs;
3320
3321                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3322                 strs << new_bpm;
3323                 show_verbose_cursor_text (strs.str());
3324
3325         } else if (_movable && !_real_section->locked_to_meter()) {
3326                 TempoMap& map (_editor->session()->tempo_map());
3327                 const bool was_music = _real_section->position_lock_style() == MusicTime;
3328
3329                 pf = adjusted_current_frame (event);
3330
3331                 if (!_editor->snap_musical()) {
3332
3333                         if (was_music) {
3334                                 _real_section->set_position_lock_style (AudioTime);
3335                         }
3336
3337                         map.gui_move_tempo (_real_section, pf);
3338
3339                         if (was_music) {
3340                                 _real_section->set_position_lock_style (MusicTime);
3341                         }
3342
3343                 } else {
3344
3345                         if (!was_music) {
3346                                 _real_section->set_position_lock_style (MusicTime);
3347                         }
3348
3349                         map.gui_move_tempo (_real_section, pf);
3350
3351                         if (!was_music) {
3352                                 _real_section->set_position_lock_style (AudioTime);
3353                         }
3354                 }
3355
3356                 show_verbose_cursor_time (_real_section->frame());
3357         }
3358
3359         /* this has moved the bar lines themselves, so recalibrate the offset */
3360         setup_pointer_frame_offset();
3361
3362         _marker->set_position (pf);
3363 }
3364
3365 void
3366 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3367 {
3368         if (!_real_section->active()) {
3369                 return;
3370         }
3371         if (!movement_occurred) {
3372                 if (was_double_click()) {
3373                         _editor->edit_tempo_marker (*_marker);
3374                 }
3375                 return;
3376         }
3377
3378         TempoMap& map (_editor->session()->tempo_map());
3379
3380         XMLNode &after = map.get_state();
3381         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3382         _editor->commit_reversible_command ();
3383
3384         // delete the dummy marker we used for visual representation while moving.
3385         // a new visual marker will show up automatically.
3386         delete _marker;
3387 }
3388
3389 void
3390 TempoMarkerDrag::aborted (bool moved)
3391 {
3392         _marker->set_position (_marker->tempo().frame());
3393         if (moved) {
3394                 TempoMap& map (_editor->session()->tempo_map());
3395                 map.set_state (*before_state, Stateful::current_state_version);
3396                 // delete the dummy marker we used for visual representation while moving.
3397                 // a new visual marker will show up automatically.
3398                 delete _marker;
3399         }
3400 }
3401
3402 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3403         : Drag (e, i)
3404         , _pulse (0.0)
3405         , _beat (0.0)
3406         , _tempo (0)
3407         , before_state (0)
3408 {
3409         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3410
3411 }
3412
3413 void
3414 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3415 {
3416         Drag::start_grab (event, cursor);
3417
3418         TempoMap& map (_editor->session()->tempo_map());
3419         ostringstream sstr;
3420
3421         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3422         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3423         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3424         show_verbose_cursor_text (sstr.str());
3425         finished (event, false);
3426 }
3427
3428 void
3429 BBTRulerDrag::setup_pointer_frame_offset ()
3430 {
3431         TempoMap& map (_editor->session()->tempo_map());
3432         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3433         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3434         if (divisions > 0) {
3435                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3436         } else {
3437                 /* while it makes some sense for the user to determine the division to 'grab',
3438                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3439                    and the result over steep tempo curves. Use sixteenths.
3440                 */
3441                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3442         }
3443         _pulse = map.pulse_at_beat (_beat);
3444         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3445 }
3446
3447 void
3448 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3449 {
3450         TempoMap& map (_editor->session()->tempo_map());
3451
3452         if (first_move) {
3453                 /* get current state */
3454                 before_state = &map.get_state();
3455                 _editor->begin_reversible_command (_("dilate tempo"));
3456         }
3457
3458         framepos_t const pf = adjusted_current_frame (event, false);
3459
3460         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3461                 /* adjust previous tempo to match pointer frame */
3462                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3463         }
3464         ostringstream sstr;
3465         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3466         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3467         show_verbose_cursor_text (sstr.str());
3468 }
3469
3470 void
3471 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3472 {
3473         if (!movement_occurred) {
3474                 return;
3475         }
3476
3477         TempoMap& map (_editor->session()->tempo_map());
3478
3479         XMLNode &after = map.get_state();
3480         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3481         _editor->commit_reversible_command ();
3482 }
3483
3484 void
3485 BBTRulerDrag::aborted (bool moved)
3486 {
3487         if (moved) {
3488                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3489         }
3490 }
3491
3492
3493 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3494         : Drag (e, &c.track_canvas_item(), false)
3495         , _cursor (c)
3496         , _stop (s)
3497         , _grab_zoom (0.0)
3498 {
3499         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3500 }
3501
3502 /** Do all the things we do when dragging the playhead to make it look as though
3503  *  we have located, without actually doing the locate (because that would cause
3504  *  the diskstream buffers to be refilled, which is too slow).
3505  */
3506 void
3507 CursorDrag::fake_locate (framepos_t t)
3508 {
3509         if (_editor->session () == 0) {
3510                 return;
3511         }
3512
3513         _editor->playhead_cursor->set_position (t);
3514
3515         Session* s = _editor->session ();
3516         if (s->timecode_transmission_suspended ()) {
3517                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3518                 /* This is asynchronous so it will be sent "now"
3519                  */
3520                 s->send_mmc_locate (f);
3521                 /* These are synchronous and will be sent during the next
3522                    process cycle
3523                 */
3524                 s->queue_full_time_code ();
3525                 s->queue_song_position_pointer ();
3526         }
3527
3528         show_verbose_cursor_time (t);
3529         _editor->UpdateAllTransportClocks (t);
3530 }
3531
3532 void
3533 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3534 {
3535         Drag::start_grab (event, c);
3536         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3537
3538         _grab_zoom = _editor->samples_per_pixel;
3539
3540         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3541
3542         _editor->snap_to_with_modifier (where, event);
3543
3544         _editor->_dragging_playhead = true;
3545
3546         Session* s = _editor->session ();
3547
3548         /* grab the track canvas item as well */
3549
3550         _cursor.track_canvas_item().grab();
3551
3552         if (s) {
3553                 if (_was_rolling && _stop) {
3554                         s->request_stop ();
3555                 }
3556
3557                 if (s->is_auditioning()) {
3558                         s->cancel_audition ();
3559                 }
3560
3561
3562                 if (AudioEngine::instance()->connected()) {
3563
3564                         /* do this only if we're the engine is connected
3565                          * because otherwise this request will never be
3566                          * serviced and we'll busy wait forever. likewise,
3567                          * notice if we are disconnected while waiting for the
3568                          * request to be serviced.
3569                          */
3570
3571                         s->request_suspend_timecode_transmission ();
3572                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3573                                 /* twiddle our thumbs */
3574                         }
3575                 }
3576         }
3577
3578         fake_locate (where - snap_delta (event->button.state));
3579 }
3580
3581 void
3582 CursorDrag::motion (GdkEvent* event, bool)
3583 {
3584         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3585         _editor->snap_to_with_modifier (where, event);
3586         if (where != last_pointer_frame()) {
3587                 fake_locate (where - snap_delta (event->button.state));
3588         }
3589 }
3590
3591 void
3592 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3593 {
3594         _editor->_dragging_playhead = false;
3595
3596         _cursor.track_canvas_item().ungrab();
3597
3598         if (!movement_occurred && _stop) {
3599                 return;
3600         }
3601
3602         motion (event, false);
3603
3604         Session* s = _editor->session ();
3605         if (s) {
3606                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3607                 _editor->_pending_locate_request = true;
3608                 s->request_resume_timecode_transmission ();
3609         }
3610 }
3611
3612 void
3613 CursorDrag::aborted (bool)
3614 {
3615         _cursor.track_canvas_item().ungrab();
3616
3617         if (_editor->_dragging_playhead) {
3618                 _editor->session()->request_resume_timecode_transmission ();
3619                 _editor->_dragging_playhead = false;
3620         }
3621
3622         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3623 }
3624
3625 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3626         : RegionDrag (e, i, p, v)
3627 {
3628         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3629 }
3630
3631 void
3632 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3633 {
3634         Drag::start_grab (event, cursor);
3635
3636         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3637         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3638         setup_snap_delta (r->position ());
3639
3640         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3641 }
3642
3643 void
3644 FadeInDrag::setup_pointer_frame_offset ()
3645 {
3646         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3647         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3648         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3649 }
3650
3651 void
3652 FadeInDrag::motion (GdkEvent* event, bool)
3653 {
3654         framecnt_t fade_length;
3655
3656         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3657         _editor->snap_to_with_modifier (pos, event);
3658         pos -= snap_delta (event->button.state);
3659
3660         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3661
3662         if (pos < (region->position() + 64)) {
3663                 fade_length = 64; // this should be a minimum defined somewhere
3664         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3665                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3666         } else {
3667                 fade_length = pos - region->position();
3668         }
3669
3670         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3671
3672                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3673
3674                 if (!tmp) {
3675                         continue;
3676                 }
3677
3678                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3679         }
3680
3681         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3682 }
3683
3684 void
3685 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3686 {
3687         if (!movement_occurred) {
3688                 return;
3689         }
3690
3691         framecnt_t fade_length;
3692         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3693         _editor->snap_to_with_modifier (pos, event);
3694         pos -= snap_delta (event->button.state);
3695
3696         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3697
3698         if (pos < (region->position() + 64)) {
3699                 fade_length = 64; // this should be a minimum defined somewhere
3700         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3701                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3702         } else {
3703                 fade_length = pos - region->position();
3704         }
3705
3706         bool in_command = false;
3707
3708         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3709
3710                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3711
3712                 if (!tmp) {
3713                         continue;
3714                 }
3715
3716                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3717                 XMLNode &before = alist->get_state();
3718
3719                 tmp->audio_region()->set_fade_in_length (fade_length);
3720                 tmp->audio_region()->set_fade_in_active (true);
3721
3722                 if (!in_command) {
3723                         _editor->begin_reversible_command (_("change fade in length"));
3724                         in_command = true;
3725                 }
3726                 XMLNode &after = alist->get_state();
3727                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3728         }
3729
3730         if (in_command) {
3731                 _editor->commit_reversible_command ();
3732         }
3733 }
3734
3735 void
3736 FadeInDrag::aborted (bool)
3737 {
3738         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3739                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3740
3741                 if (!tmp) {
3742                         continue;
3743                 }
3744
3745                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3746         }
3747 }
3748
3749 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3750         : RegionDrag (e, i, p, v)
3751 {
3752         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3753 }
3754
3755 void
3756 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3757 {
3758         Drag::start_grab (event, cursor);
3759
3760         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3761         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3762         setup_snap_delta (r->last_frame ());
3763
3764         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3765 }
3766
3767 void
3768 FadeOutDrag::setup_pointer_frame_offset ()
3769 {
3770         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3771         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3772         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3773 }
3774
3775 void
3776 FadeOutDrag::motion (GdkEvent* event, bool)
3777 {
3778         framecnt_t fade_length;
3779
3780         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3781         _editor->snap_to_with_modifier (pos, event);
3782         pos -= snap_delta (event->button.state);
3783
3784         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3785
3786         if (pos > (region->last_frame() - 64)) {
3787                 fade_length = 64; // this should really be a minimum fade defined somewhere
3788         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3789                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3790         } else {
3791                 fade_length = region->last_frame() - pos;
3792         }
3793
3794         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3795
3796                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3797
3798                 if (!tmp) {
3799                         continue;
3800                 }
3801
3802                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3803         }
3804
3805         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3806 }
3807
3808 void
3809 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3810 {
3811         if (!movement_occurred) {
3812                 return;
3813         }
3814
3815         framecnt_t fade_length;
3816
3817         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3818         _editor->snap_to_with_modifier (pos, event);
3819         pos -= snap_delta (event->button.state);
3820
3821         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3822
3823         if (pos > (region->last_frame() - 64)) {
3824                 fade_length = 64; // this should really be a minimum fade defined somewhere
3825         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3826                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3827         } else {
3828                 fade_length = region->last_frame() - pos;
3829         }
3830
3831         bool in_command = false;
3832
3833         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3834
3835                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3836
3837                 if (!tmp) {
3838                         continue;
3839                 }
3840
3841                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3842                 XMLNode &before = alist->get_state();
3843
3844                 tmp->audio_region()->set_fade_out_length (fade_length);
3845                 tmp->audio_region()->set_fade_out_active (true);
3846
3847                 if (!in_command) {
3848                         _editor->begin_reversible_command (_("change fade out length"));
3849                         in_command = true;
3850                 }
3851                 XMLNode &after = alist->get_state();
3852                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3853         }
3854
3855         if (in_command) {
3856                 _editor->commit_reversible_command ();
3857         }
3858 }
3859
3860 void
3861 FadeOutDrag::aborted (bool)
3862 {
3863         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3864                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3865
3866                 if (!tmp) {
3867                         continue;
3868                 }
3869
3870                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3871         }
3872 }
3873
3874 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3875         : Drag (e, i)
3876         , _selection_changed (false)
3877 {
3878         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3879         Gtk::Window* toplevel = _editor->current_toplevel();
3880         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3881
3882         assert (_marker);
3883
3884         _points.push_back (ArdourCanvas::Duple (0, 0));
3885
3886         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3887 }
3888
3889 MarkerDrag::~MarkerDrag ()
3890 {
3891         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3892                 delete i->location;
3893         }
3894 }
3895
3896 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3897 {
3898         location = new Location (*l);
3899         markers.push_back (m);
3900         move_both = false;
3901 }
3902
3903 void
3904 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3905 {
3906         Drag::start_grab (event, cursor);
3907
3908         bool is_start;
3909
3910         Location *location = _editor->find_location_from_marker (_marker, is_start);
3911         _editor->_dragging_edit_point = true;
3912
3913         update_item (location);
3914
3915         // _drag_line->show();
3916         // _line->raise_to_top();
3917
3918         if (is_start) {
3919                 show_verbose_cursor_time (location->start());
3920         } else {
3921                 show_verbose_cursor_time (location->end());
3922         }
3923         setup_snap_delta (is_start ? location->start() : location->end());
3924
3925         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3926
3927         switch (op) {
3928         case Selection::Toggle:
3929                 /* we toggle on the button release */
3930                 break;
3931         case Selection::Set:
3932                 if (!_editor->selection->selected (_marker)) {
3933                         _editor->selection->set (_marker);
3934                         _selection_changed = true;
3935                 }
3936                 break;
3937         case Selection::Extend:
3938         {
3939                 Locations::LocationList ll;
3940                 list<ArdourMarker*> to_add;
3941                 framepos_t s, e;
3942                 _editor->selection->markers.range (s, e);
3943                 s = min (_marker->position(), s);
3944                 e = max (_marker->position(), e);
3945                 s = min (s, e);
3946                 e = max (s, e);
3947                 if (e < max_framepos) {
3948                         ++e;
3949                 }
3950                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3951                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3952                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
3953                         if (lm) {
3954                                 if (lm->start) {
3955                                         to_add.push_back (lm->start);
3956                                 }
3957                                 if (lm->end) {
3958                                         to_add.push_back (lm->end);
3959                                 }
3960                         }
3961                 }
3962                 if (!to_add.empty()) {
3963                         _editor->selection->add (to_add);
3964                         _selection_changed = true;
3965                 }
3966                 break;
3967         }
3968         case Selection::Add:
3969                 _editor->selection->add (_marker);
3970                 _selection_changed = true;
3971
3972                 break;
3973         }
3974
3975         /* Set up copies for us to manipulate during the drag
3976          */
3977
3978         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
3979
3980                 Location* l = _editor->find_location_from_marker (*i, is_start);
3981
3982                 if (!l) {
3983                         continue;
3984                 }
3985
3986                 if (l->is_mark()) {
3987                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
3988                 } else {
3989                         /* range: check that the other end of the range isn't
3990                            already there.
3991                         */
3992                         CopiedLocationInfo::iterator x;
3993                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
3994                                 if (*(*x).location == *l) {
3995                                         break;
3996                                 }
3997                         }
3998                         if (x == _copied_locations.end()) {
3999                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4000                         } else {
4001                                 (*x).markers.push_back (*i);
4002                                 (*x).move_both = true;
4003                         }
4004                 }
4005
4006         }
4007 }
4008
4009 void
4010 MarkerDrag::setup_pointer_frame_offset ()
4011 {
4012         bool is_start;
4013         Location *location = _editor->find_location_from_marker (_marker, is_start);
4014         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4015 }
4016
4017 void
4018 MarkerDrag::motion (GdkEvent* event, bool)
4019 {
4020         framecnt_t f_delta = 0;
4021         bool is_start;
4022         bool move_both = false;
4023         Location *real_location;
4024         Location *copy_location = 0;
4025         framecnt_t const sd = snap_delta (event->button.state);
4026
4027         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4028         framepos_t next = newframe;
4029
4030         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4031                 move_both = true;
4032         }
4033
4034         CopiedLocationInfo::iterator x;
4035
4036         /* find the marker we're dragging, and compute the delta */
4037
4038         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4039
4040                 copy_location = (*x).location;
4041
4042                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4043
4044                         /* this marker is represented by this
4045                          * CopiedLocationMarkerInfo
4046                          */
4047
4048                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4049                                 /* que pasa ?? */
4050                                 return;
4051                         }
4052
4053                         if (real_location->is_mark()) {
4054                                 f_delta = newframe - copy_location->start();
4055                         } else {
4056
4057
4058                                 switch (_marker->type()) {
4059                                 case ArdourMarker::SessionStart:
4060                                 case ArdourMarker::RangeStart:
4061                                 case ArdourMarker::LoopStart:
4062                                 case ArdourMarker::PunchIn:
4063                                         f_delta = newframe - copy_location->start();
4064                                         break;
4065
4066                                 case ArdourMarker::SessionEnd:
4067                                 case ArdourMarker::RangeEnd:
4068                                 case ArdourMarker::LoopEnd:
4069                                 case ArdourMarker::PunchOut:
4070                                         f_delta = newframe - copy_location->end();
4071                                         break;
4072                                 default:
4073                                         /* what kind of marker is this ? */
4074                                         return;
4075                                 }
4076                         }
4077
4078                         break;
4079                 }
4080         }
4081
4082         if (x == _copied_locations.end()) {
4083                 /* hmm, impossible - we didn't find the dragged marker */
4084                 return;
4085         }
4086
4087         /* now move them all */
4088
4089         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4090
4091                 copy_location = x->location;
4092
4093                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4094                         continue;
4095                 }
4096
4097                 if (real_location->locked()) {
4098                         continue;
4099                 }
4100
4101                 if (copy_location->is_mark()) {
4102
4103                         /* now move it */
4104
4105                         copy_location->set_start (copy_location->start() + f_delta);
4106
4107                 } else {
4108
4109                         framepos_t new_start = copy_location->start() + f_delta;
4110                         framepos_t new_end = copy_location->end() + f_delta;
4111
4112                         if (is_start) { // start-of-range marker
4113
4114                                 if (move_both || (*x).move_both) {
4115                                         copy_location->set_start (new_start);
4116                                         copy_location->set_end (new_end);
4117                                 } else  if (new_start < copy_location->end()) {
4118                                         copy_location->set_start (new_start);
4119                                 } else if (newframe > 0) {
4120                                         //_editor->snap_to (next, RoundUpAlways, true);
4121                                         copy_location->set_end (next);
4122                                         copy_location->set_start (newframe);
4123                                 }
4124
4125                         } else { // end marker
4126
4127                                 if (move_both || (*x).move_both) {
4128                                         copy_location->set_end (new_end);
4129                                         copy_location->set_start (new_start);
4130                                 } else if (new_end > copy_location->start()) {
4131                                         copy_location->set_end (new_end);
4132                                 } else if (newframe > 0) {
4133                                         //_editor->snap_to (next, RoundDownAlways, true);
4134                                         copy_location->set_start (next);
4135                                         copy_location->set_end (newframe);
4136                                 }
4137                         }
4138                 }
4139
4140                 update_item (copy_location);
4141
4142                 /* now lookup the actual GUI items used to display this
4143                  * location and move them to wherever the copy of the location
4144                  * is now. This means that the logic in ARDOUR::Location is
4145                  * still enforced, even though we are not (yet) modifying
4146                  * the real Location itself.
4147                  */
4148
4149                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4150
4151                 if (lm) {
4152                         lm->set_position (copy_location->start(), copy_location->end());
4153                 }
4154
4155         }
4156
4157         assert (!_copied_locations.empty());
4158
4159         show_verbose_cursor_time (newframe);
4160 }
4161
4162 void
4163 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4164 {
4165         if (!movement_occurred) {
4166
4167                 if (was_double_click()) {
4168                         _editor->rename_marker (_marker);
4169                         return;
4170                 }
4171
4172                 /* just a click, do nothing but finish
4173                    off the selection process
4174                 */
4175
4176                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4177                 switch (op) {
4178                 case Selection::Set:
4179                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4180                                 _editor->selection->set (_marker);
4181                                 _selection_changed = true;
4182                         }
4183                         break;
4184
4185                 case Selection::Toggle:
4186                         /* we toggle on the button release, click only */
4187                         _editor->selection->toggle (_marker);
4188                         _selection_changed = true;
4189
4190                         break;
4191
4192                 case Selection::Extend:
4193                 case Selection::Add:
4194                         break;
4195                 }
4196
4197                 if (_selection_changed) {
4198                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4199                         _editor->commit_reversible_selection_op();
4200                 }
4201
4202                 return;
4203         }
4204
4205         _editor->_dragging_edit_point = false;
4206
4207         XMLNode &before = _editor->session()->locations()->get_state();
4208         bool in_command = false;
4209
4210         MarkerSelection::iterator i;
4211         CopiedLocationInfo::iterator x;
4212         bool is_start;
4213
4214         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4215              x != _copied_locations.end() && i != _editor->selection->markers.end();
4216              ++i, ++x) {
4217
4218                 Location * location = _editor->find_location_from_marker (*i, is_start);
4219
4220                 if (location) {
4221
4222                         if (location->locked()) {
4223                                 continue;
4224                         }
4225                         if (!in_command) {
4226                                 _editor->begin_reversible_command ( _("move marker") );
4227                                 in_command = true;
4228                         }
4229                         if (location->is_mark()) {
4230                                 location->set_start (((*x).location)->start());
4231                         } else {
4232                                 location->set (((*x).location)->start(), ((*x).location)->end());
4233                         }
4234                 }
4235         }
4236
4237         if (in_command) {
4238                 XMLNode &after = _editor->session()->locations()->get_state();
4239                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4240                 _editor->commit_reversible_command ();
4241         }
4242 }
4243
4244 void
4245 MarkerDrag::aborted (bool movement_occurred)
4246 {
4247         if (!movement_occurred) {
4248                 return;
4249         }
4250
4251         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4252
4253                 /* move all markers to their original location */
4254
4255
4256                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4257
4258                         bool is_start;
4259                         Location * location = _editor->find_location_from_marker (*m, is_start);
4260
4261                         if (location) {
4262                                 (*m)->set_position (is_start ? location->start() : location->end());
4263                         }
4264                 }
4265         }
4266 }
4267
4268 void
4269 MarkerDrag::update_item (Location*)
4270 {
4271         /* noop */
4272 }
4273
4274 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4275         : Drag (e, i)
4276         , _fixed_grab_x (0.0)
4277         , _fixed_grab_y (0.0)
4278         , _cumulative_x_drag (0.0)
4279         , _cumulative_y_drag (0.0)
4280         , _pushing (false)
4281         , _final_index (0)
4282 {
4283         if (_zero_gain_fraction < 0.0) {
4284                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4285         }
4286
4287         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4288
4289         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4290         assert (_point);
4291 }
4292
4293
4294 void
4295 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4296 {
4297         Drag::start_grab (event, _editor->cursors()->fader);
4298
4299         // start the grab at the center of the control point so
4300         // the point doesn't 'jump' to the mouse after the first drag
4301         _fixed_grab_x = _point->get_x();
4302         _fixed_grab_y = _point->get_y();
4303
4304         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4305         setup_snap_delta (pos);
4306
4307         float const fraction = 1 - (_point->get_y() / _point->line().height());
4308         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4309
4310         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4311
4312         if (!_point->can_slide ()) {
4313                 _x_constrained = true;
4314         }
4315 }
4316
4317 void
4318 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4319 {
4320         double dx = _drags->current_pointer_x() - last_pointer_x();
4321         double dy = current_pointer_y() - last_pointer_y();
4322         bool need_snap = true;
4323
4324         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4325                 dx *= 0.1;
4326                 dy *= 0.1;
4327                 need_snap = false;
4328         }
4329
4330         /* coordinate in pixels relative to the start of the region (for region-based automation)
4331            or track (for track-based automation) */
4332         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4333         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4334
4335         // calculate zero crossing point. back off by .01 to stay on the
4336         // positive side of zero
4337         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4338
4339         if (_x_constrained) {
4340                 cx = _fixed_grab_x;
4341         }
4342         if (_y_constrained) {
4343                 cy = _fixed_grab_y;
4344         }
4345
4346         _cumulative_x_drag = cx - _fixed_grab_x;
4347         _cumulative_y_drag = cy - _fixed_grab_y;
4348
4349         cx = max (0.0, cx);
4350         cy = max (0.0, cy);
4351         cy = min ((double) _point->line().height(), cy);
4352
4353         // make sure we hit zero when passing through
4354         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4355                 cy = zero_gain_y;
4356         }
4357
4358         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4359
4360         if (!_x_constrained && need_snap) {
4361                 _editor->snap_to_with_modifier (cx_frames, event);
4362         }
4363
4364         cx_frames -= snap_delta (event->button.state);
4365         cx_frames = min (cx_frames, _point->line().maximum_time());
4366
4367         float const fraction = 1.0 - (cy / _point->line().height());
4368
4369         if (first_motion) {
4370                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4371                 _editor->begin_reversible_command (_("automation event move"));
4372                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4373         }
4374         pair<double, float> result;
4375         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4376
4377         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4378 }
4379
4380 void
4381 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4382 {
4383         if (!movement_occurred) {
4384
4385                 /* just a click */
4386                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4387                         _editor->reset_point_selection ();
4388                 }
4389
4390         } else {
4391                 _point->line().end_drag (_pushing, _final_index);
4392                 _editor->commit_reversible_command ();
4393         }
4394 }
4395
4396 void
4397 ControlPointDrag::aborted (bool)
4398 {
4399         _point->line().reset ();
4400 }
4401
4402 bool
4403 ControlPointDrag::active (Editing::MouseMode m)
4404 {
4405         if (m == Editing::MouseDraw) {
4406                 /* always active in mouse draw */
4407                 return true;
4408         }
4409
4410         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4411         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4412 }
4413
4414 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4415         : Drag (e, i)
4416         , _line (0)
4417         , _fixed_grab_x (0.0)
4418         , _fixed_grab_y (0.0)
4419         , _cumulative_y_drag (0)
4420         , _before (0)
4421         , _after (0)
4422 {
4423         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4424 }
4425
4426 void
4427 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4428 {
4429         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4430         assert (_line);
4431
4432         _item = &_line->grab_item ();
4433
4434         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4435            origin, and ditto for y.
4436         */
4437
4438         double mx = event->button.x;
4439         double my = event->button.y;
4440
4441         _line->grab_item().canvas_to_item (mx, my);
4442
4443         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4444
4445         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4446                 /* no adjacent points */
4447                 return;
4448         }
4449
4450         Drag::start_grab (event, _editor->cursors()->fader);
4451
4452         /* store grab start in item frame */
4453         double const bx = _line->nth (_before)->get_x();
4454         double const ax = _line->nth (_after)->get_x();
4455         double const click_ratio = (ax - mx) / (ax - bx);
4456
4457         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4458
4459         _fixed_grab_x = mx;
4460         _fixed_grab_y = cy;
4461
4462         double fraction = 1.0 - (cy / _line->height());
4463
4464         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4465 }
4466
4467 void
4468 LineDrag::motion (GdkEvent* event, bool first_move)
4469 {
4470         double dy = current_pointer_y() - last_pointer_y();
4471
4472         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4473                 dy *= 0.1;
4474         }
4475
4476         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4477
4478         _cumulative_y_drag = cy - _fixed_grab_y;
4479
4480         cy = max (0.0, cy);
4481         cy = min ((double) _line->height(), cy);
4482
4483         double const fraction = 1.0 - (cy / _line->height());
4484         uint32_t ignored;
4485
4486         if (first_move) {
4487                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4488
4489                 _editor->begin_reversible_command (_("automation range move"));
4490                 _line->start_drag_line (_before, _after, initial_fraction);
4491         }
4492
4493         /* we are ignoring x position for this drag, so we can just pass in anything */
4494         pair<double, float> result;
4495
4496         result = _line->drag_motion (0, fraction, true, false, ignored);
4497         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4498 }
4499
4500 void
4501 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4502 {
4503         if (movement_occurred) {
4504                 motion (event, false);
4505                 _line->end_drag (false, 0);
4506                 _editor->commit_reversible_command ();
4507         } else {
4508                 /* add a new control point on the line */
4509
4510                 AutomationTimeAxisView* atv;
4511
4512                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4513                         framepos_t where = grab_frame ();
4514
4515                         double cx = 0;
4516                         double cy = _fixed_grab_y;
4517
4518                         _line->grab_item().item_to_canvas (cx, cy);
4519
4520                         atv->add_automation_event (event, where, cy, false);
4521                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4522                         AudioRegionView* arv;
4523
4524                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4525                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4526                         }
4527                 }
4528         }
4529 }
4530
4531 void
4532 LineDrag::aborted (bool)
4533 {
4534         _line->reset ();
4535 }
4536
4537 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4538         : Drag (e, i),
4539           _line (0),
4540           _arv (0),
4541           _region_view_grab_x (0.0),
4542           _cumulative_x_drag (0),
4543           _before (0.0),
4544           _max_x (0)
4545 {
4546         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4547 }
4548
4549 void
4550 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4551 {
4552         Drag::start_grab (event);
4553
4554         _line = reinterpret_cast<Line*> (_item);
4555         assert (_line);
4556
4557         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4558
4559         double cx = event->button.x;
4560         double cy = event->button.y;
4561
4562         _item->parent()->canvas_to_item (cx, cy);
4563
4564         /* store grab start in parent frame */
4565         _region_view_grab_x = cx;
4566
4567         _before = *(float*) _item->get_data ("position");
4568
4569         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4570
4571         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4572 }
4573
4574 void
4575 FeatureLineDrag::motion (GdkEvent*, bool)
4576 {
4577         double dx = _drags->current_pointer_x() - last_pointer_x();
4578
4579         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4580
4581         _cumulative_x_drag += dx;
4582
4583         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4584
4585         if (cx > _max_x){
4586                 cx = _max_x;
4587         }
4588         else if(cx < 0){
4589                 cx = 0;
4590         }
4591
4592         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4593         assert (bbox);
4594         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4595
4596         float *pos = new float;
4597         *pos = cx;
4598
4599         _line->set_data ("position", pos);
4600
4601         _before = cx;
4602 }
4603
4604 void
4605 FeatureLineDrag::finished (GdkEvent*, bool)
4606 {
4607         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4608         _arv->update_transient(_before, _before);
4609 }
4610
4611 void
4612 FeatureLineDrag::aborted (bool)
4613 {
4614         //_line->reset ();
4615 }
4616
4617 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4618         : Drag (e, i)
4619         , _vertical_only (false)
4620 {
4621         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4622 }
4623
4624 void
4625 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4626 {
4627         Drag::start_grab (event);
4628         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4629 }
4630
4631 void
4632 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4633 {
4634         framepos_t start;
4635         framepos_t end;
4636         double y1;
4637         double y2;
4638
4639         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4640
4641         framepos_t grab = grab_frame ();
4642         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4643                 _editor->snap_to_with_modifier (grab, event);
4644         } else {
4645                 grab = raw_grab_frame ();
4646         }
4647
4648         /* base start and end on initial click position */
4649
4650         if (pf < grab) {
4651                 start = pf;
4652                 end = grab;
4653         } else {
4654                 end = pf;
4655                 start = grab;
4656         }
4657
4658         if (current_pointer_y() < grab_y()) {
4659                 y1 = current_pointer_y();
4660                 y2 = grab_y();
4661         } else {
4662                 y2 = current_pointer_y();
4663                 y1 = grab_y();
4664         }
4665
4666         if (start != end || y1 != y2) {
4667
4668                 double x1 = _editor->sample_to_pixel (start);
4669                 double x2 = _editor->sample_to_pixel (end);
4670                 const double min_dimension = 2.0;
4671
4672                 if (_vertical_only) {
4673                         /* fixed 10 pixel width */
4674                         x2 = x1 + 10;
4675                 } else {
4676                         if (x2 < x1) {
4677                                 x2 = min (x1 - min_dimension, x2);
4678                         } else {
4679                                 x2 = max (x1 + min_dimension, x2);
4680                         }
4681                 }
4682
4683                 if (y2 < y1) {
4684                         y2 = min (y1 - min_dimension, y2);
4685                 } else {
4686                         y2 = max (y1 + min_dimension, y2);
4687                 }
4688
4689                 /* translate rect into item space and set */
4690
4691                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4692
4693                 /* this drag is a _trackview_only == true drag, so the y1 and
4694                  * y2 (computed using current_pointer_y() and grab_y()) will be
4695                  * relative to the top of the trackview group). The
4696                  * rubberband rect has the same parent/scroll offset as the
4697                  * the trackview group, so we can use the "r" rect directly
4698                  * to set the shape of the rubberband.
4699                  */
4700
4701                 _editor->rubberband_rect->set (r);
4702                 _editor->rubberband_rect->show();
4703                 _editor->rubberband_rect->raise_to_top();
4704
4705                 show_verbose_cursor_time (pf);
4706
4707                 do_select_things (event, true);
4708         }
4709 }
4710
4711 void
4712 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4713 {
4714         framepos_t x1;
4715         framepos_t x2;
4716         framepos_t grab = grab_frame ();
4717         framepos_t lpf = last_pointer_frame ();
4718
4719         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4720                 grab = raw_grab_frame ();
4721                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4722         }
4723
4724         if (grab < lpf) {
4725                 x1 = grab;
4726                 x2 = lpf;
4727         } else {
4728                 x2 = grab;
4729                 x1 = lpf;
4730         }
4731
4732         double y1;
4733         double y2;
4734
4735         if (current_pointer_y() < grab_y()) {
4736                 y1 = current_pointer_y();
4737                 y2 = grab_y();
4738         } else {
4739                 y2 = current_pointer_y();
4740                 y1 = grab_y();
4741         }
4742
4743         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4744 }
4745
4746 void
4747 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4748 {
4749         if (movement_occurred) {
4750
4751                 motion (event, false);
4752                 do_select_things (event, false);
4753
4754         } else {
4755
4756                 /* just a click */
4757
4758                 bool do_deselect = true;
4759                 MidiTimeAxisView* mtv;
4760
4761                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4762                         /* MIDI track */
4763                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4764                                 /* nothing selected */
4765                                 add_midi_region (mtv, true);
4766                                 do_deselect = false;
4767                         }
4768                 }
4769
4770                 /* do not deselect if Primary or Tertiary (toggle-select or
4771                  * extend-select are pressed.
4772                  */
4773
4774                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4775                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4776                     do_deselect) {
4777                         deselect_things ();
4778                 }
4779
4780         }
4781
4782         _editor->rubberband_rect->hide();
4783 }
4784
4785 void
4786 RubberbandSelectDrag::aborted (bool)
4787 {
4788         _editor->rubberband_rect->hide ();
4789 }
4790
4791 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4792         : RegionDrag (e, i, p, v)
4793 {
4794         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4795 }
4796
4797 void
4798 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4799 {
4800         Drag::start_grab (event, cursor);
4801
4802         _editor->get_selection().add (_primary);
4803
4804         framepos_t where = _primary->region()->position();
4805         setup_snap_delta (where);
4806
4807         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4808 }
4809
4810 void
4811 TimeFXDrag::motion (GdkEvent* event, bool)
4812 {
4813         RegionView* rv = _primary;
4814         StreamView* cv = rv->get_time_axis_view().view ();
4815
4816         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4817         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4818         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4819         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4820         _editor->snap_to_with_modifier (pf, event);
4821         pf -= snap_delta (event->button.state);
4822
4823         if (pf > rv->region()->position()) {
4824                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4825         }
4826
4827         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4828 }
4829
4830 void
4831 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4832 {
4833         /* this may have been a single click, no drag. We still want the dialog
4834            to show up in that case, so that the user can manually edit the
4835            parameters for the timestretch.
4836         */
4837
4838         float fraction = 1.0;
4839
4840         if (movement_occurred) {
4841
4842                 motion (event, false);
4843
4844                 _primary->get_time_axis_view().hide_timestretch ();
4845
4846                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4847
4848                 if (adjusted_frame_pos < _primary->region()->position()) {
4849                         /* backwards drag of the left edge - not usable */
4850                         return;
4851                 }
4852
4853                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4854
4855                 fraction = (double) newlen / (double) _primary->region()->length();
4856
4857 #ifndef USE_RUBBERBAND
4858                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4859                 if (_primary->region()->data_type() == DataType::AUDIO) {
4860                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4861                 }
4862 #endif
4863         }
4864
4865         if (!_editor->get_selection().regions.empty()) {
4866                 /* primary will already be included in the selection, and edit
4867                    group shared editing will propagate selection across
4868                    equivalent regions, so just use the current region
4869                    selection.
4870                 */
4871
4872                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4873                         error << _("An error occurred while executing time stretch operation") << endmsg;
4874                 }
4875         }
4876 }
4877
4878 void
4879 TimeFXDrag::aborted (bool)
4880 {
4881         _primary->get_time_axis_view().hide_timestretch ();
4882 }
4883
4884 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4885         : Drag (e, i)
4886 {
4887         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4888 }
4889
4890 void
4891 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4892 {
4893         Drag::start_grab (event);
4894 }
4895
4896 void
4897 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4898 {
4899         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4900 }
4901
4902 void
4903 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4904 {
4905         if (movement_occurred && _editor->session()) {
4906                 /* make sure we stop */
4907                 _editor->session()->request_transport_speed (0.0);
4908         }
4909 }
4910
4911 void
4912 ScrubDrag::aborted (bool)
4913 {
4914         /* XXX: TODO */
4915 }
4916
4917 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4918         : Drag (e, i)
4919         , _operation (o)
4920         , _add (false)
4921         , _time_selection_at_start (!_editor->get_selection().time.empty())
4922 {
4923         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4924
4925         if (_time_selection_at_start) {
4926                 start_at_start = _editor->get_selection().time.start();
4927                 end_at_start = _editor->get_selection().time.end_frame();
4928         }
4929 }
4930
4931 void
4932 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4933 {
4934         if (_editor->session() == 0) {
4935                 return;
4936         }
4937
4938         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4939
4940         switch (_operation) {
4941         case CreateSelection:
4942                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4943                         _add = true;
4944                 } else {
4945                         _add = false;
4946                 }
4947                 cursor = _editor->cursors()->selector;
4948                 Drag::start_grab (event, cursor);
4949                 break;
4950
4951         case SelectionStartTrim:
4952                 if (_editor->clicked_axisview) {
4953                         _editor->clicked_axisview->order_selection_trims (_item, true);
4954                 }
4955                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
4956                 break;
4957
4958         case SelectionEndTrim:
4959                 if (_editor->clicked_axisview) {
4960                         _editor->clicked_axisview->order_selection_trims (_item, false);
4961                 }
4962                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
4963                 break;
4964
4965         case SelectionMove:
4966                 Drag::start_grab (event, cursor);
4967                 break;
4968
4969         case SelectionExtend:
4970                 Drag::start_grab (event, cursor);
4971                 break;
4972         }
4973
4974         if (_operation == SelectionMove) {
4975                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
4976         } else {
4977                 show_verbose_cursor_time (adjusted_current_frame (event));
4978         }
4979 }
4980
4981 void
4982 SelectionDrag::setup_pointer_frame_offset ()
4983 {
4984         switch (_operation) {
4985         case CreateSelection:
4986                 _pointer_frame_offset = 0;
4987                 break;
4988
4989         case SelectionStartTrim:
4990         case SelectionMove:
4991                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
4992                 break;
4993
4994         case SelectionEndTrim:
4995                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
4996                 break;
4997
4998         case SelectionExtend:
4999                 break;
5000         }
5001 }
5002
5003 void
5004 SelectionDrag::motion (GdkEvent* event, bool first_move)
5005 {
5006         framepos_t start = 0;
5007         framepos_t end = 0;
5008         framecnt_t length = 0;
5009         framecnt_t distance = 0;
5010
5011         framepos_t const pending_position = adjusted_current_frame (event);
5012
5013         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5014                 return;
5015         }
5016
5017         switch (_operation) {
5018         case CreateSelection:
5019         {
5020                 framepos_t grab = grab_frame ();
5021
5022                 if (first_move) {
5023                         grab = adjusted_current_frame (event, false);
5024                         if (grab < pending_position) {
5025                                 _editor->snap_to (grab, RoundDownMaybe);
5026                         }  else {
5027                                 _editor->snap_to (grab, RoundUpMaybe);
5028                         }
5029                 }
5030
5031                 if (pending_position < grab) {
5032                         start = pending_position;
5033                         end = grab;
5034                 } else {
5035                         end = pending_position;
5036                         start = grab;
5037                 }
5038
5039                 /* first drag: Either add to the selection
5040                    or create a new selection
5041                 */
5042
5043                 if (first_move) {
5044
5045                         if (_add) {
5046
5047                                 /* adding to the selection */
5048                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5049                                 _editor->clicked_selection = _editor->selection->add (start, end);
5050                                 _add = false;
5051
5052                         } else {
5053
5054                                 /* new selection */
5055
5056                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5057                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5058                                 }
5059
5060                                 _editor->clicked_selection = _editor->selection->set (start, end);
5061                         }
5062                 }
5063
5064                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5065                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5066                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5067                 if (atest) {
5068                         _editor->selection->add (atest);
5069                         break;
5070                 }
5071
5072                 /* select all tracks within the rectangle that we've marked out so far */
5073                 TrackViewList new_selection;
5074                 TrackViewList& all_tracks (_editor->track_views);
5075
5076                 ArdourCanvas::Coord const top = grab_y();
5077                 ArdourCanvas::Coord const bottom = current_pointer_y();
5078
5079                 if (top >= 0 && bottom >= 0) {
5080
5081                         //first, find the tracks that are covered in the y range selection
5082                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5083                                 if ((*i)->covered_by_y_range (top, bottom)) {
5084                                         new_selection.push_back (*i);
5085                                 }
5086                         }
5087
5088                         //now find any tracks that are GROUPED with the tracks we selected
5089                         TrackViewList grouped_add = new_selection;
5090                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5091                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5092                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5093                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5094                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5095                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5096                                                         grouped_add.push_back (*j);
5097                                         }
5098                                 }
5099                         }
5100
5101                         //now compare our list with the current selection, and add or remove as necessary
5102                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5103                         TrackViewList tracks_to_add;
5104                         TrackViewList tracks_to_remove;
5105                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5106                                 if ( !_editor->selection->tracks.contains ( *i ) )
5107                                         tracks_to_add.push_back ( *i );
5108                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5109                                 if ( !grouped_add.contains ( *i ) )
5110                                         tracks_to_remove.push_back ( *i );
5111                         _editor->selection->add(tracks_to_add);
5112                         _editor->selection->remove(tracks_to_remove);
5113
5114                 }
5115         }
5116         break;
5117
5118         case SelectionStartTrim:
5119
5120                 end = _editor->selection->time[_editor->clicked_selection].end;
5121
5122                 if (pending_position > end) {
5123                         start = end;
5124                 } else {
5125                         start = pending_position;
5126                 }
5127                 break;
5128
5129         case SelectionEndTrim:
5130
5131                 start = _editor->selection->time[_editor->clicked_selection].start;
5132
5133                 if (pending_position < start) {
5134                         end = start;
5135                 } else {
5136                         end = pending_position;
5137                 }
5138
5139                 break;
5140
5141         case SelectionMove:
5142
5143                 start = _editor->selection->time[_editor->clicked_selection].start;
5144                 end = _editor->selection->time[_editor->clicked_selection].end;
5145
5146                 length = end - start;
5147                 distance = pending_position - start;
5148                 start = pending_position;
5149                 _editor->snap_to (start);
5150
5151                 end = start + length;
5152
5153                 break;
5154
5155         case SelectionExtend:
5156                 break;
5157         }
5158
5159         if (start != end) {
5160                 switch (_operation) {
5161                 case SelectionMove:
5162                         if (_time_selection_at_start) {
5163                                 _editor->selection->move_time (distance);
5164                         }
5165                         break;
5166                 default:
5167                         _editor->selection->replace (_editor->clicked_selection, start, end);
5168                 }
5169         }
5170
5171         if (_operation == SelectionMove) {
5172                 show_verbose_cursor_time(start);
5173         } else {
5174                 show_verbose_cursor_time(pending_position);
5175         }
5176 }
5177
5178 void
5179 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5180 {
5181         Session* s = _editor->session();
5182
5183         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5184         if (movement_occurred) {
5185                 motion (event, false);
5186                 /* XXX this is not object-oriented programming at all. ick */
5187                 if (_editor->selection->time.consolidate()) {
5188                         _editor->selection->TimeChanged ();
5189                 }
5190
5191                 /* XXX what if its a music time selection? */
5192                 if (s) {
5193                         if (s->get_play_range() && s->transport_rolling()) {
5194                                 s->request_play_range (&_editor->selection->time, true);
5195                         } else if (!s->config.get_external_sync()) {
5196                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5197                                         if (_operation == SelectionEndTrim)
5198                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5199                                         else
5200                                                 s->request_locate (_editor->get_selection().time.start());
5201                                 }
5202                         }
5203
5204                         if (_editor->get_selection().time.length() != 0) {
5205                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5206                         } else {
5207                                 s->clear_range_selection ();
5208                         }
5209                 }
5210
5211         } else {
5212                 /* just a click, no pointer movement.
5213                  */
5214
5215                 if (_operation == SelectionExtend) {
5216                         if (_time_selection_at_start) {
5217                                 framepos_t pos = adjusted_current_frame (event, false);
5218                                 framepos_t start = min (pos, start_at_start);
5219                                 framepos_t end = max (pos, end_at_start);
5220                                 _editor->selection->set (start, end);
5221                         }
5222                 } else {
5223                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5224                                 if (_editor->clicked_selection) {
5225                                         _editor->selection->remove (_editor->clicked_selection);
5226                                 }
5227                         } else {
5228                                 if (!_editor->clicked_selection) {
5229                                         _editor->selection->clear_time();
5230                                 }
5231                         }
5232                 }
5233
5234                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5235                         _editor->selection->set (_editor->clicked_axisview);
5236                 }
5237
5238                 if (s && s->get_play_range () && s->transport_rolling()) {
5239                         s->request_stop (false, false);
5240                 }
5241
5242         }
5243
5244         _editor->stop_canvas_autoscroll ();
5245         _editor->clicked_selection = 0;
5246         _editor->commit_reversible_selection_op ();
5247 }
5248
5249 void
5250 SelectionDrag::aborted (bool)
5251 {
5252         /* XXX: TODO */
5253 }
5254
5255 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5256         : Drag (e, i, false),
5257           _operation (o),
5258           _copy (false)
5259 {
5260         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5261
5262         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5263                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5264                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5265         _drag_rect->hide ();
5266
5267         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5268         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5269 }
5270
5271 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5272 {
5273         /* normal canvas items will be cleaned up when their parent group is deleted. But
5274            this item is created as the child of a long-lived parent group, and so we
5275            need to explicitly delete it.
5276         */
5277         delete _drag_rect;
5278 }
5279
5280 void
5281 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5282 {
5283         if (_editor->session() == 0) {
5284                 return;
5285         }
5286
5287         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5288
5289         if (!_editor->temp_location) {
5290                 _editor->temp_location = new Location (*_editor->session());
5291         }
5292
5293         switch (_operation) {
5294         case CreateSkipMarker:
5295         case CreateRangeMarker:
5296         case CreateTransportMarker:
5297         case CreateCDMarker:
5298
5299                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5300                         _copy = true;
5301                 } else {
5302                         _copy = false;
5303                 }
5304                 cursor = _editor->cursors()->selector;
5305                 break;
5306         }
5307
5308         Drag::start_grab (event, cursor);
5309
5310         show_verbose_cursor_time (adjusted_current_frame (event));
5311 }
5312
5313 void
5314 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5315 {
5316         framepos_t start = 0;
5317         framepos_t end = 0;
5318         ArdourCanvas::Rectangle *crect;
5319
5320         switch (_operation) {
5321         case CreateSkipMarker:
5322                 crect = _editor->range_bar_drag_rect;
5323                 break;
5324         case CreateRangeMarker:
5325                 crect = _editor->range_bar_drag_rect;
5326                 break;
5327         case CreateTransportMarker:
5328                 crect = _editor->transport_bar_drag_rect;
5329                 break;
5330         case CreateCDMarker:
5331                 crect = _editor->cd_marker_bar_drag_rect;
5332                 break;
5333         default:
5334                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5335                 return;
5336                 break;
5337         }
5338
5339         framepos_t const pf = adjusted_current_frame (event);
5340
5341         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5342                 framepos_t grab = grab_frame ();
5343                 _editor->snap_to (grab);
5344
5345                 if (pf < grab_frame()) {
5346                         start = pf;
5347                         end = grab;
5348                 } else {
5349                         end = pf;
5350                         start = grab;
5351                 }
5352
5353                 /* first drag: Either add to the selection
5354                    or create a new selection.
5355                 */
5356
5357                 if (first_move) {
5358
5359                         _editor->temp_location->set (start, end);
5360
5361                         crect->show ();
5362
5363                         update_item (_editor->temp_location);
5364                         _drag_rect->show();
5365                         //_drag_rect->raise_to_top();
5366
5367                 }
5368         }
5369
5370         if (start != end) {
5371                 _editor->temp_location->set (start, end);
5372
5373                 double x1 = _editor->sample_to_pixel (start);
5374                 double x2 = _editor->sample_to_pixel (end);
5375                 crect->set_x0 (x1);
5376                 crect->set_x1 (x2);
5377
5378                 update_item (_editor->temp_location);
5379         }
5380
5381         show_verbose_cursor_time (pf);
5382
5383 }
5384
5385 void
5386 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5387 {
5388         Location * newloc = 0;
5389         string rangename;
5390         int flags;
5391
5392         if (movement_occurred) {
5393                 motion (event, false);
5394                 _drag_rect->hide();
5395
5396                 switch (_operation) {
5397                 case CreateSkipMarker:
5398                 case CreateRangeMarker:
5399                 case CreateCDMarker:
5400                     {
5401                         XMLNode &before = _editor->session()->locations()->get_state();
5402                         if (_operation == CreateSkipMarker) {
5403                                 _editor->begin_reversible_command (_("new skip marker"));
5404                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5405                                 flags = Location::IsRangeMarker | Location::IsSkip;
5406                                 _editor->range_bar_drag_rect->hide();
5407                         } else if (_operation == CreateCDMarker) {
5408                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5409                                 _editor->begin_reversible_command (_("new CD marker"));
5410                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5411                                 _editor->cd_marker_bar_drag_rect->hide();
5412                         } else {
5413                                 _editor->begin_reversible_command (_("new skip marker"));
5414                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5415                                 flags = Location::IsRangeMarker;
5416                                 _editor->range_bar_drag_rect->hide();
5417                         }
5418                         newloc = new Location (
5419                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5420                                 );
5421
5422                         _editor->session()->locations()->add (newloc, true);
5423                         XMLNode &after = _editor->session()->locations()->get_state();
5424                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5425                         _editor->commit_reversible_command ();
5426                         break;
5427                     }
5428
5429                 case CreateTransportMarker:
5430                         // popup menu to pick loop or punch
5431                         _editor->new_transport_marker_context_menu (&event->button, _item);
5432                         break;
5433                 }
5434
5435         } else {
5436
5437                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5438
5439                 if (_operation == CreateTransportMarker) {
5440
5441                         /* didn't drag, so just locate */
5442
5443                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5444
5445                 } else if (_operation == CreateCDMarker) {
5446
5447                         /* didn't drag, but mark is already created so do
5448                          * nothing */
5449
5450                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5451
5452                         framepos_t start;
5453                         framepos_t end;
5454
5455                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5456
5457                         if (end == max_framepos) {
5458                                 end = _editor->session()->current_end_frame ();
5459                         }
5460
5461                         if (start == max_framepos) {
5462                                 start = _editor->session()->current_start_frame ();
5463                         }
5464
5465                         switch (_editor->mouse_mode) {
5466                         case MouseObject:
5467                                 /* find the two markers on either side and then make the selection from it */
5468                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5469                                 break;
5470
5471                         case MouseRange:
5472                                 /* find the two markers on either side of the click and make the range out of it */
5473                                 _editor->selection->set (start, end);
5474                                 break;
5475
5476                         default:
5477                                 break;
5478                         }
5479                 }
5480         }
5481
5482         _editor->stop_canvas_autoscroll ();
5483 }
5484
5485 void
5486 RangeMarkerBarDrag::aborted (bool movement_occurred)
5487 {
5488         if (movement_occurred) {
5489                 _drag_rect->hide ();
5490         }
5491 }
5492
5493 void
5494 RangeMarkerBarDrag::update_item (Location* location)
5495 {
5496         double const x1 = _editor->sample_to_pixel (location->start());
5497         double const x2 = _editor->sample_to_pixel (location->end());
5498
5499         _drag_rect->set_x0 (x1);
5500         _drag_rect->set_x1 (x2);
5501 }
5502
5503 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5504         : Drag (e, i)
5505         , _cumulative_dx (0)
5506         , _cumulative_dy (0)
5507         , _was_selected (false)
5508 {
5509         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5510
5511         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5512         assert (_primary);
5513         _region = &_primary->region_view ();
5514         _note_height = _region->midi_stream_view()->note_height ();
5515 }
5516
5517 void
5518 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5519 {
5520         Drag::start_grab (event);
5521         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5522
5523         if (!(_was_selected = _primary->selected())) {
5524
5525                 /* tertiary-click means extend selection - we'll do that on button release,
5526                    so don't add it here, because otherwise we make it hard to figure
5527                    out the "extend-to" range.
5528                 */
5529
5530                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5531
5532                 if (!extend) {
5533                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5534
5535                         if (add) {
5536                                 _region->note_selected (_primary, true);
5537                         } else {
5538                                 _editor->get_selection().clear_points();
5539                                 _region->unique_select (_primary);
5540                         }
5541                 }
5542         }
5543 }
5544
5545 /** @return Current total drag x change in frames */
5546 frameoffset_t
5547 NoteDrag::total_dx (const guint state) const
5548 {
5549         /* dx in frames */
5550         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5551
5552         /* primary note time */
5553         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5554
5555         /* new time of the primary note in session frames */
5556         frameoffset_t st = n + dx + snap_delta (state);
5557
5558         framepos_t const rp = _region->region()->position ();
5559
5560         /* prevent the note being dragged earlier than the region's position */
5561         st = max (st, rp);
5562
5563         /* possibly snap and return corresponding delta */
5564
5565         bool snap = true;
5566
5567         if (ArdourKeyboard::indicates_snap (state)) {
5568                 if (_editor->snap_mode () != SnapOff) {
5569                         snap = false;
5570                 }
5571         } else {
5572                 if (_editor->snap_mode () == SnapOff) {
5573                         snap = false;
5574                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5575                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5576                                 snap = true;
5577                         }
5578                 }
5579         }
5580
5581         frameoffset_t ret;
5582         if (snap) {
5583                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5584                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5585         } else {
5586                 ret = st - n - snap_delta (state);
5587         }
5588         return ret;
5589 }
5590
5591 /** @return Current total drag y change in note number */
5592 int8_t
5593 NoteDrag::total_dy () const
5594 {
5595         MidiStreamView* msv = _region->midi_stream_view ();
5596         double const y = _region->midi_view()->y_position ();
5597         /* new current note */
5598         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5599         /* clamp */
5600         n = max (msv->lowest_note(), n);
5601         n = min (msv->highest_note(), n);
5602         /* and work out delta */
5603         return n - msv->y_to_note (grab_y() - y);
5604 }
5605
5606 void
5607 NoteDrag::motion (GdkEvent * event, bool)
5608 {
5609         /* Total change in x and y since the start of the drag */
5610         frameoffset_t const dx = total_dx (event->button.state);
5611         int8_t const dy = total_dy ();
5612
5613         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5614         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5615         double const tdy = -dy * _note_height - _cumulative_dy;
5616
5617         if (tdx || tdy) {
5618                 _cumulative_dx += tdx;
5619                 _cumulative_dy += tdy;
5620
5621                 int8_t note_delta = total_dy();
5622
5623                 _region->move_selection (tdx, tdy, note_delta);
5624
5625                 /* the new note value may be the same as the old one, but we
5626                  * don't know what that means because the selection may have
5627                  * involved more than one note and we might be doing something
5628                  * odd with them. so show the note value anyway, always.
5629                  */
5630
5631                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5632
5633                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5634         }
5635 }
5636
5637 void
5638 NoteDrag::finished (GdkEvent* ev, bool moved)
5639 {
5640         if (!moved) {
5641                 /* no motion - select note */
5642
5643                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5644                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5645
5646                         bool changed = false;
5647
5648                         if (_was_selected) {
5649                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5650                                 if (add) {
5651                                         _region->note_deselected (_primary);
5652                                         changed = true;
5653                                 } else {
5654                                         _editor->get_selection().clear_points();
5655                                         _region->unique_select (_primary);
5656                                         changed = true;
5657                                 }
5658                         } else {
5659                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5660                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5661
5662                                 if (!extend && !add && _region->selection_size() > 1) {
5663                                         _editor->get_selection().clear_points();
5664                                         _region->unique_select (_primary);
5665                                         changed = true;
5666                                 } else if (extend) {
5667                                         _region->note_selected (_primary, true, true);
5668                                         changed = true;
5669                                 } else {
5670                                         /* it was added during button press */
5671                                         changed = true;
5672
5673                                 }
5674                         }
5675
5676                         if (changed) {
5677                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5678                                 _editor->commit_reversible_selection_op();
5679                         }
5680                 }
5681         } else {
5682                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5683         }
5684 }
5685
5686 void
5687 NoteDrag::aborted (bool)
5688 {
5689         /* XXX: TODO */
5690 }
5691
5692 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5693 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5694         : Drag (editor, atv->base_item ())
5695         , _ranges (r)
5696         , _y_origin (atv->y_position())
5697         , _nothing_to_drag (false)
5698 {
5699         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5700         setup (atv->lines ());
5701 }
5702
5703 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5704 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5705         : Drag (editor, rv->get_canvas_group ())
5706         , _ranges (r)
5707         , _y_origin (rv->get_time_axis_view().y_position())
5708         , _nothing_to_drag (false)
5709         , _integral (false)
5710 {
5711         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5712
5713         list<boost::shared_ptr<AutomationLine> > lines;
5714
5715         AudioRegionView*      audio_view;
5716         AutomationRegionView* automation_view;
5717         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5718                 lines.push_back (audio_view->get_gain_line ());
5719         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5720                 lines.push_back (automation_view->line ());
5721                 _integral = true;
5722         } else {
5723                 error << _("Automation range drag created for invalid region type") << endmsg;
5724         }
5725
5726         setup (lines);
5727 }
5728
5729 /** @param lines AutomationLines to drag.
5730  *  @param offset Offset from the session start to the points in the AutomationLines.
5731  */
5732 void
5733 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5734 {
5735         /* find the lines that overlap the ranges being dragged */
5736         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5737         while (i != lines.end ()) {
5738                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5739                 ++j;
5740
5741                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5742
5743                 /* check this range against all the AudioRanges that we are using */
5744                 list<AudioRange>::const_iterator k = _ranges.begin ();
5745                 while (k != _ranges.end()) {
5746                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5747                                 break;
5748                         }
5749                         ++k;
5750                 }
5751
5752                 /* add it to our list if it overlaps at all */
5753                 if (k != _ranges.end()) {
5754                         Line n;
5755                         n.line = *i;
5756                         n.state = 0;
5757                         n.range = r;
5758                         _lines.push_back (n);
5759                 }
5760
5761                 i = j;
5762         }
5763
5764         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5765 }
5766
5767 double
5768 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5769 {
5770         return 1.0 - ((global_y - _y_origin) / line->height());
5771 }
5772
5773 double
5774 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5775 {
5776         const double v = list->eval(x);
5777         return _integral ? rint(v) : v;
5778 }
5779
5780 void
5781 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5782 {
5783         Drag::start_grab (event, cursor);
5784
5785         /* Get line states before we start changing things */
5786         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5787                 i->state = &i->line->get_state ();
5788                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5789         }
5790
5791         if (_ranges.empty()) {
5792
5793                 /* No selected time ranges: drag all points */
5794                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5795                         uint32_t const N = i->line->npoints ();
5796                         for (uint32_t j = 0; j < N; ++j) {
5797                                 i->points.push_back (i->line->nth (j));
5798                         }
5799                 }
5800
5801         }
5802
5803         if (_nothing_to_drag) {
5804                 return;
5805         }
5806 }
5807
5808 void
5809 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5810 {
5811         if (_nothing_to_drag && !first_move) {
5812                 return;
5813         }
5814
5815         if (first_move) {
5816                 _editor->begin_reversible_command (_("automation range move"));
5817
5818                 if (!_ranges.empty()) {
5819
5820                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5821
5822                                 framecnt_t const half = (i->start + i->end) / 2;
5823
5824                                 /* find the line that this audio range starts in */
5825                                 list<Line>::iterator j = _lines.begin();
5826                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5827                                         ++j;
5828                                 }
5829
5830                                 if (j != _lines.end()) {
5831                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5832
5833                                 /* j is the line that this audio range starts in; fade into it;
5834                                    64 samples length plucked out of thin air.
5835                                 */
5836
5837                                         framepos_t a = i->start + 64;
5838                                         if (a > half) {
5839                                                 a = half;
5840                                         }
5841
5842                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5843                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5844
5845                                         XMLNode &before = the_list->get_state();
5846                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5847                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5848
5849                                         if (add_p || add_q) {
5850                                                 _editor->session()->add_command (
5851                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5852                                         }
5853                                 }
5854
5855                                 /* same thing for the end */
5856
5857                                 j = _lines.begin();
5858                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5859                                         ++j;
5860                                 }
5861
5862                                 if (j != _lines.end()) {
5863                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5864
5865                                         /* j is the line that this audio range starts in; fade out of it;
5866                                            64 samples length plucked out of thin air.
5867                                         */
5868
5869                                         framepos_t b = i->end - 64;
5870                                         if (b < half) {
5871                                                 b = half;
5872                                         }
5873
5874                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5875                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5876
5877                                         XMLNode &before = the_list->get_state();
5878                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5879                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5880
5881                                         if (add_p || add_q) {
5882                                                 _editor->session()->add_command (
5883                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5884                                         }
5885                                 }
5886                         }
5887
5888                         _nothing_to_drag = true;
5889
5890                         /* Find all the points that should be dragged and put them in the relevant
5891                            points lists in the Line structs.
5892                         */
5893
5894                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5895
5896                                 uint32_t const N = i->line->npoints ();
5897                                 for (uint32_t j = 0; j < N; ++j) {
5898
5899                                         /* here's a control point on this line */
5900                                         ControlPoint* p = i->line->nth (j);
5901                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5902
5903                                         /* see if it's inside a range */
5904                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5905                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5906                                                 ++k;
5907                                         }
5908
5909                                         if (k != _ranges.end()) {
5910                                                 /* dragging this point */
5911                                                 _nothing_to_drag = false;
5912                                                 i->points.push_back (p);
5913                                         }
5914                                 }
5915                         }
5916                 }
5917
5918                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5919                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5920                 }
5921         }
5922
5923         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5924                 float const f = y_fraction (l->line, current_pointer_y());
5925                 /* we are ignoring x position for this drag, so we can just pass in anything */
5926                 pair<double, float> result;
5927                 uint32_t ignored;
5928                 result = l->line->drag_motion (0, f, true, false, ignored);
5929                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5930         }
5931 }
5932
5933 void
5934 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5935 {
5936         if (_nothing_to_drag || !motion_occurred) {
5937                 return;
5938         }
5939
5940         motion (event, false);
5941         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5942                 i->line->end_drag (false, 0);
5943         }
5944
5945         _editor->commit_reversible_command ();
5946 }
5947
5948 void
5949 AutomationRangeDrag::aborted (bool)
5950 {
5951         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5952                 i->line->reset ();
5953         }
5954 }
5955
5956 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
5957         : view (v)
5958         , initial_time_axis_view (itav)
5959 {
5960         /* note that time_axis_view may be null if the regionview was created
5961          * as part of a copy operation.
5962          */
5963         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
5964         layer = v->region()->layer ();
5965         initial_y = v->get_canvas_group()->position().y;
5966         initial_playlist = v->region()->playlist ();
5967         initial_position = v->region()->position ();
5968         initial_end = v->region()->position () + v->region()->length ();
5969 }
5970
5971 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
5972         : Drag (e, i->canvas_item ())
5973         , _region_view (r)
5974         , _patch_change (i)
5975         , _cumulative_dx (0)
5976 {
5977         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
5978                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
5979                                                    grab_frame()));
5980 }
5981
5982 void
5983 PatchChangeDrag::motion (GdkEvent* ev, bool)
5984 {
5985         framepos_t f = adjusted_current_frame (ev);
5986         boost::shared_ptr<Region> r = _region_view->region ();
5987         f = max (f, r->position ());
5988         f = min (f, r->last_frame ());
5989
5990         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
5991         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
5992         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
5993         _cumulative_dx = dxu;
5994 }
5995
5996 void
5997 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
5998 {
5999         if (!movement_occurred) {
6000                 return;
6001         }
6002
6003         boost::shared_ptr<Region> r (_region_view->region ());
6004         framepos_t f = adjusted_current_frame (ev);
6005         f = max (f, r->position ());
6006         f = min (f, r->last_frame ());
6007
6008         _region_view->move_patch_change (
6009                 *_patch_change,
6010                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6011                 );
6012 }
6013
6014 void
6015 PatchChangeDrag::aborted (bool)
6016 {
6017         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6018 }
6019
6020 void
6021 PatchChangeDrag::setup_pointer_frame_offset ()
6022 {
6023         boost::shared_ptr<Region> region = _region_view->region ();
6024         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6025 }
6026
6027 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6028         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6029         , _region_view (rv)
6030 {
6031
6032 }
6033
6034 void
6035 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6036 {
6037         _region_view->update_drag_selection (
6038                 x1, x2, y1, y2,
6039                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6040 }
6041
6042 void
6043 MidiRubberbandSelectDrag::deselect_things ()
6044 {
6045         /* XXX */
6046 }
6047
6048 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6049         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6050         , _region_view (rv)
6051 {
6052         _vertical_only = true;
6053 }
6054
6055 void
6056 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6057 {
6058         double const y = _region_view->midi_view()->y_position ();
6059
6060         y1 = max (0.0, y1 - y);
6061         y2 = max (0.0, y2 - y);
6062
6063         _region_view->update_vertical_drag_selection (
6064                 y1,
6065                 y2,
6066                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6067                 );
6068 }
6069
6070 void
6071 MidiVerticalSelectDrag::deselect_things ()
6072 {
6073         /* XXX */
6074 }
6075
6076 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6077         : RubberbandSelectDrag (e, i)
6078 {
6079
6080 }
6081
6082 void
6083 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6084 {
6085         if (drag_in_progress) {
6086                 /* We just want to select things at the end of the drag, not during it */
6087                 return;
6088         }
6089
6090         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6091
6092         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6093
6094         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6095
6096         _editor->commit_reversible_selection_op ();
6097 }
6098
6099 void
6100 EditorRubberbandSelectDrag::deselect_things ()
6101 {
6102         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6103
6104         _editor->selection->clear_tracks();
6105         _editor->selection->clear_regions();
6106         _editor->selection->clear_points ();
6107         _editor->selection->clear_lines ();
6108         _editor->selection->clear_midi_notes ();
6109
6110         _editor->commit_reversible_selection_op();
6111 }
6112
6113 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6114         : Drag (e, i)
6115         , _region_view (rv)
6116         , _drag_rect (0)
6117 {
6118         _note[0] = _note[1] = 0;
6119 }
6120
6121 NoteCreateDrag::~NoteCreateDrag ()
6122 {
6123         delete _drag_rect;
6124 }
6125
6126 framecnt_t
6127 NoteCreateDrag::grid_frames (framepos_t t) const
6128 {
6129         bool success;
6130         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6131         if (!success) {
6132                 grid_beats = Evoral::Beats(1);
6133         }
6134
6135         return _region_view->region_beats_to_region_frames (grid_beats);
6136 }
6137
6138 void
6139 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6140 {
6141         Drag::start_grab (event, cursor);
6142
6143         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6144
6145         framepos_t pf = _drags->current_pointer_frame ();
6146         framecnt_t const g = grid_frames (pf);
6147
6148         /* Hack so that we always snap to the note that we are over, instead of snapping
6149            to the next one if we're more than halfway through the one we're over.
6150         */
6151         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6152                 pf -= g / 2;
6153         }
6154
6155         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6156         _note[1] = _note[0];
6157
6158         MidiStreamView* sv = _region_view->midi_stream_view ();
6159         double const x = _editor->sample_to_pixel (_note[0]);
6160         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6161
6162         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6163         _drag_rect->set_outline_all ();
6164         _drag_rect->set_outline_color (0xffffff99);
6165         _drag_rect->set_fill_color (0xffffff66);
6166 }
6167
6168 void
6169 NoteCreateDrag::motion (GdkEvent* event, bool)
6170 {
6171         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6172         double const x0 = _editor->sample_to_pixel (_note[0]);
6173         double const x1 = _editor->sample_to_pixel (_note[1]);
6174         _drag_rect->set_x0 (std::min(x0, x1));
6175         _drag_rect->set_x1 (std::max(x0, x1));
6176 }
6177
6178 void
6179 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6180 {
6181         if (!had_movement) {
6182                 return;
6183         }
6184
6185         framepos_t const start = min (_note[0], _note[1]);
6186         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6187
6188         framecnt_t const g = grid_frames (start);
6189         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6190
6191         if (_editor->snap_mode() == SnapNormal && length < g) {
6192                 length = g;
6193         }
6194
6195         Evoral::Beats length_beats = max (
6196                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6197
6198         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6199 }
6200
6201 double
6202 NoteCreateDrag::y_to_region (double y) const
6203 {
6204         double x = 0;
6205         _region_view->get_canvas_group()->canvas_to_item (x, y);
6206         return y;
6207 }
6208
6209 void
6210 NoteCreateDrag::aborted (bool)
6211 {
6212
6213 }
6214
6215 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6216         : Drag (e, i)
6217         , arv (rv)
6218         , start (start_yn)
6219 {
6220         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6221 }
6222
6223 void
6224 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6225 {
6226         Drag::start_grab (event, cursor);
6227 }
6228
6229 void
6230 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6231 {
6232         double distance;
6233         double new_length;
6234         framecnt_t len;
6235
6236         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6237
6238         if (start) {
6239                 distance = _drags->current_pointer_x() - grab_x();
6240                 len = ar->fade_in()->back()->when;
6241         } else {
6242                 distance = grab_x() - _drags->current_pointer_x();
6243                 len = ar->fade_out()->back()->when;
6244         }
6245
6246         /* how long should it be ? */
6247
6248         new_length = len + _editor->pixel_to_sample (distance);
6249
6250         /* now check with the region that this is legal */
6251
6252         new_length = ar->verify_xfade_bounds (new_length, start);
6253
6254         if (start) {
6255                 arv->reset_fade_in_shape_width (ar, new_length);
6256         } else {
6257                 arv->reset_fade_out_shape_width (ar, new_length);
6258         }
6259 }
6260
6261 void
6262 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6263 {
6264         double distance;
6265         double new_length;
6266         framecnt_t len;
6267
6268         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6269
6270         if (start) {
6271                 distance = _drags->current_pointer_x() - grab_x();
6272                 len = ar->fade_in()->back()->when;
6273         } else {
6274                 distance = grab_x() - _drags->current_pointer_x();
6275                 len = ar->fade_out()->back()->when;
6276         }
6277
6278         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6279
6280         _editor->begin_reversible_command ("xfade trim");
6281         ar->playlist()->clear_owned_changes ();
6282
6283         if (start) {
6284                 ar->set_fade_in_length (new_length);
6285         } else {
6286                 ar->set_fade_out_length (new_length);
6287         }
6288
6289         /* Adjusting the xfade may affect other regions in the playlist, so we need
6290            to get undo Commands from the whole playlist rather than just the
6291            region.
6292         */
6293
6294         vector<Command*> cmds;
6295         ar->playlist()->rdiff (cmds);
6296         _editor->session()->add_commands (cmds);
6297         _editor->commit_reversible_command ();
6298
6299 }
6300
6301 void
6302 CrossfadeEdgeDrag::aborted (bool)
6303 {
6304         if (start) {
6305                 // arv->redraw_start_xfade ();
6306         } else {
6307                 // arv->redraw_end_xfade ();
6308         }
6309 }
6310
6311 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6312         : Drag (e, item, true)
6313         , line (new EditorCursor (*e))
6314 {
6315         line->set_position (pos);
6316         line->show ();
6317 }
6318
6319 RegionCutDrag::~RegionCutDrag ()
6320 {
6321         delete line;
6322 }
6323
6324 void
6325 RegionCutDrag::motion (GdkEvent*, bool)
6326 {
6327         framepos_t where = _drags->current_pointer_frame();
6328         _editor->snap_to (where);
6329
6330         line->set_position (where);
6331 }
6332
6333 void
6334 RegionCutDrag::finished (GdkEvent*, bool)
6335 {
6336         _editor->get_track_canvas()->canvas()->re_enter();
6337
6338         framepos_t pos = _drags->current_pointer_frame();
6339
6340         line->hide ();
6341
6342         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6343
6344         if (rs.empty()) {
6345                 return;
6346         }
6347
6348         _editor->split_regions_at (pos, rs);
6349 }
6350
6351 void
6352 RegionCutDrag::aborted (bool)
6353 {
6354 }