gtk2_ardour/editor_drag.cc

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