gtk2_ardour/editor_drag.cc

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