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