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