gtk2_ardour/editor_drag.cc

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <stdint.h>
  25 #include <algorithm>
  26
  27 #include "pbd/memento_command.h"
  28 #include "pbd/basename.h"
  29 #include "pbd/stateful_diff_command.h"
  30
  31 #include "gtkmm2ext/utils.h"
  32
  33 #include "ardour/audioengine.h"
  34 #include "ardour/audioregion.h"
  35 #include "ardour/audio_track.h"
  36 #include "ardour/dB.h"
  37 #include "ardour/midi_region.h"
  38 #include "ardour/midi_track.h"
  39 #include "ardour/operations.h"
  40 #include "ardour/region_factory.h"
  41 #include "ardour/session.h"
  42
  43 #include "canvas/canvas.h"
  44 #include "canvas/scroll_group.h"
  45
  46 #include "editor.h"
  47 #include "i18n.h"
  48 #include "keyboard.h"
  49 #include "audio_region_view.h"
  50 #include "automation_region_view.h"
  51 #include "midi_region_view.h"
  52 #include "ardour_ui.h"
  53 #include "gui_thread.h"
  54 #include "control_point.h"
  55 #include "region_gain_line.h"
  56 #include "editor_drag.h"
  57 #include "audio_time_axis.h"
  58 #include "midi_time_axis.h"
  59 #include "selection.h"
  60 #include "midi_selection.h"
  61 #include "automation_time_axis.h"
  62 #include "debug.h"
  63 #include "editor_cursors.h"
  64 #include "mouse_cursors.h"
  65 #include "note_base.h"
  66 #include "patch_change.h"
  67 #include "ui_config.h"
  68 #include "verbose_cursor.h"
  69
  70 using namespace std;
  71 using namespace ARDOUR;
  72 using namespace PBD;
  73 using namespace Gtk;
  74 using namespace Gtkmm2ext;
  75 using namespace Editing;
  76 using namespace ArdourCanvas;
  77
  78 using Gtkmm2ext::Keyboard;
  79
  80 double ControlPointDrag::_zero_gain_fraction = -1.0;
  81
  82 DragManager::DragManager (Editor* e)
  83         : _editor (e)
  84         , _ending (false)
  85         , _current_pointer_x (0.0)
  86         , _current_pointer_y (0.0)
  87         , _current_pointer_frame (0)
  88         , _old_follow_playhead (false)
  89 {
  90 }
  91
  92 DragManager::~DragManager ()
  93 {
  94         abort ();
  95 }
  96
  97 /** Call abort for each active drag */
  98 void
  99 DragManager::abort ()
 100 {
 101         _ending = true;
 102
 103         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 104                 (*i)->abort ();
 105                 delete *i;
 106         }
 107
 108         if (!_drags.empty ()) {
 109                 _editor->set_follow_playhead (_old_follow_playhead, false);
 110         }
 111
 112         _drags.clear ();
 113         _editor->abort_reversible_command();
 114
 115         _ending = false;
 116 }
 117
 118 void
 119 DragManager::add (Drag* d)
 120 {
 121         d->set_manager (this);
 122         _drags.push_back (d);
 123 }
 124
 125 void
 126 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
 127 {
 128         d->set_manager (this);
 129         _drags.push_back (d);
 130         start_grab (e, c);
 131 }
 132
 133 void
 134 DragManager::start_grab (GdkEvent* e, Gdk::Cursor* c)
 135 {
 136         /* Prevent follow playhead during the drag to be nice to the user */
 137         _old_follow_playhead = _editor->follow_playhead ();
 138         _editor->set_follow_playhead (false);
 139
 140         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 141
 142         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 143                 (*i)->start_grab (e, c);
 144         }
 145 }
 146
 147 /** Call end_grab for each active drag.
 148  *  @return true if any drag reported movement having occurred.
 149  */
 150 bool
 151 DragManager::end_grab (GdkEvent* e)
 152 {
 153         _ending = true;
 154
 155         bool r = false;
 156         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 157                 bool const t = (*i)->end_grab (e);
 158                 if (t) {
 159                         r = true;
 160                 }
 161                 delete *i;
 162         }
 163
 164         _drags.clear ();
 165
 166         _ending = false;
 167
 168         _editor->set_follow_playhead (_old_follow_playhead, false);
 169
 170         return r;
 171 }
 172
 173 void
 174 DragManager::mark_double_click ()
 175 {
 176         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 177                 (*i)->set_double_click (true);
 178         }
 179 }
 180
 181 bool
 182 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 183 {
 184         bool r = false;
 185
 186         /* calling this implies that we expect the event to have canvas
 187          * coordinates
 188          *
 189          * Can we guarantee that this is true?
 190          */
 191
 192         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 193
 194         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 195                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 196                 /* run all handlers; return true if at least one of them
 197                    returns true (indicating that the event has been handled).
 198                 */
 199                 if (t) {
 200                         r = true;
 201                 }
 202
 203         }
 204
 205         return r;
 206 }
 207
 208 bool
 209 DragManager::have_item (ArdourCanvas::Item* i) const
 210 {
 211         list<Drag*>::const_iterator j = _drags.begin ();
 212         while (j != _drags.end() && (*j)->item () != i) {
 213                 ++j;
 214         }
 215
 216         return j != _drags.end ();
 217 }
 218
 219 Drag::Drag (Editor* e, ArdourCanvas::Item* i, bool trackview_only)
 220         : _editor (e)
 221         , _drags (0)
 222         , _item (i)
 223         , _pointer_frame_offset (0)
 224         , _x_constrained (false)
 225         , _y_constrained (false)
 226         , _was_rolling (false)
 227         , _trackview_only (trackview_only)
 228         , _move_threshold_passed (false)
 229         , _starting_point_passed (false)
 230         , _initially_vertical (false)
 231         , _was_double_click (false)
 232         , _grab_x (0.0)
 233         , _grab_y (0.0)
 234         , _last_pointer_x (0.0)
 235         , _last_pointer_y (0.0)
 236         , _raw_grab_frame (0)
 237         , _grab_frame (0)
 238         , _last_pointer_frame (0)
 239         , _snap_delta (0)
 240 {
 241
 242 }
 243
 244 void
 245 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t /*time*/)
 246 {
 247         _item->ungrab ();
 248         _item = new_item;
 249
 250         if (!_cursor_ctx) {
 251                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 252         } else {
 253                 _cursor_ctx->change (cursor);
 254         }
 255
 256         _item->grab ();
 257 }
 258
 259 void
 260 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 261 {
 262
 263         /* we set up x/y dragging constraints on first move */
 264
 265         _raw_grab_frame = _editor->canvas_event_sample (event, &_grab_x, &_grab_y);
 266
 267         setup_pointer_frame_offset ();
 268         _grab_frame = adjusted_frame (_raw_grab_frame, event);
 269         _last_pointer_frame = _grab_frame;
 270         _last_pointer_x = _grab_x;
 271
 272         if (_trackview_only) {
 273                 _grab_y = _grab_y - _editor->get_trackview_group()->canvas_origin().y;
 274         }
 275
 276         _last_pointer_y = _grab_y;
 277
 278         _item->grab ();
 279
 280         if (!_editor->cursors()->is_invalid (cursor)) {
 281                 /* CAIROCANVAS need a variant here that passes *cursor */
 282                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 283         }
 284
 285         if (_editor->session() && _editor->session()->transport_rolling()) {
 286                 _was_rolling = true;
 287         } else {
 288                 _was_rolling = false;
 289         }
 290
 291         switch (_editor->snap_type()) {
 292         case SnapToRegionStart:
 293         case SnapToRegionEnd:
 294         case SnapToRegionSync:
 295         case SnapToRegionBoundary:
 296                 _editor->build_region_boundary_cache ();
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 /** Call to end a drag `successfully'.  Ungrabs item and calls
 304  *  subclass' finished() method.
 305  *
 306  *  @param event GDK event, or 0.
 307  *  @return true if some movement occurred, otherwise false.
 308  */
 309 bool
 310 Drag::end_grab (GdkEvent* event)
 311 {
 312         _editor->stop_canvas_autoscroll ();
 313
 314         _item->ungrab ();
 315
 316         finished (event, _move_threshold_passed);
 317
 318         _editor->verbose_cursor()->hide ();
 319         _cursor_ctx.reset();
 320
 321         return _move_threshold_passed;
 322 }
 323
 324 framepos_t
 325 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 326 {
 327         framepos_t pos = 0;
 328
 329         if (f > _pointer_frame_offset) {
 330                 pos = f - _pointer_frame_offset;
 331         }
 332
 333         if (snap) {
 334                 _editor->snap_to_with_modifier (pos, event);
 335         }
 336
 337         return pos;
 338 }
 339
 340 framepos_t
 341 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 342 {
 343         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 344 }
 345
 346 frameoffset_t
 347 Drag::snap_delta (guint state) const
 348 {
 349         if (ArdourKeyboard::indicates_snap_delta (state)) {
 350                 return _snap_delta;
 351         }
 352
 353         return 0;
 354 }
 355
 356 double
 357 Drag::current_pointer_x() const
 358 {
 359         return _drags->current_pointer_x ();
 360 }
 361
 362 double
 363 Drag::current_pointer_y () const
 364 {
 365         if (!_trackview_only) {
 366                 return _drags->current_pointer_y ();
 367         }
 368
 369         return _drags->current_pointer_y () - _editor->get_trackview_group()->canvas_origin().y;
 370 }
 371
 372 void
 373 Drag::setup_snap_delta (framepos_t pos)
 374 {
 375         framepos_t temp = pos;
 376         _editor->snap_to (temp, ARDOUR::RoundNearest, false, true);
 377         _snap_delta = temp - pos;
 378 }
 379
 380 bool
 381 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 382 {
 383         /* check to see if we have moved in any way that matters since the last motion event */
 384         if (_move_threshold_passed &&
 385             (!x_movement_matters() || _last_pointer_x == current_pointer_x ()) &&
 386             (!y_movement_matters() || _last_pointer_y == current_pointer_y ()) ) {
 387                 return false;
 388         }
 389
 390         pair<framecnt_t, int> const threshold = move_threshold ();
 391
 392         bool const old_move_threshold_passed = _move_threshold_passed;
 393
 394         if (!_move_threshold_passed) {
 395
 396                 bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
 397                 bool const yp = (::fabs ((current_pointer_y () - _grab_y)) >= threshold.second);
 398
 399                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 400         }
 401
 402         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 403
 404                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 405
 406                         if (old_move_threshold_passed != _move_threshold_passed) {
 407
 408                                 /* just changed */
 409
 410                                 if (fabs (current_pointer_y() - _grab_y) > fabs (current_pointer_x() - _grab_x)) {
 411                                         _initially_vertical = true;
 412                                 } else {
 413                                         _initially_vertical = false;
 414                                 }
 415                                 /** check constraints for this drag.
 416                                  *  Note that the current convention is to use "contains" for
 417                                  *  key modifiers during motion and "equals" when initiating a drag.
 418                                  *  In this case we haven't moved yet, so "equals" applies here.
 419                                  */
 420                                 if (Config->get_edit_mode() != Lock) {
 421                                         if (event->motion.state & Gdk::BUTTON2_MASK) {
 422                                                 // if dragging with button2, the motion is x constrained, with constraint modifier it is y constrained
 423                                                 if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 424                                                         _x_constrained = false;
 425                                                         _y_constrained = true;
 426                                                 } else {
 427                                                         _x_constrained = true;
 428                                                         _y_constrained = false;
 429                                                 }
 430                                         } else if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 431                                                 // if dragging normally, the motion is constrained to the first direction of movement.
 432                                                 if (_initially_vertical) {
 433                                                         _x_constrained = true;
 434                                                         _y_constrained = false;
 435                                                 } else {
 436                                                         _x_constrained = false;
 437                                                         _y_constrained = true;
 438                                                 }
 439                                         }
 440                                 } else {
 441                                         if (event->button.state & Gdk::BUTTON2_MASK) {
 442                                                 _x_constrained = false;
 443                                         } else {
 444                                                 _x_constrained = true;
 445                                         }
 446                                         _y_constrained = false;
 447                                 }
 448                         }
 449
 450                         if (!from_autoscroll) {
 451                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll (), false);
 452                         }
 453
 454                         if (!_editor->autoscroll_active() || from_autoscroll) {
 455
 456
 457                                 bool first_move = (_move_threshold_passed != old_move_threshold_passed) || from_autoscroll;
 458
 459                                 motion (event, first_move && !_starting_point_passed);
 460
 461                                 if (first_move && !_starting_point_passed) {
 462                                         _starting_point_passed = true;
 463                                 }
 464
 465                                 _last_pointer_x = _drags->current_pointer_x ();
 466                                 _last_pointer_y = current_pointer_y ();
 467                                 _last_pointer_frame = adjusted_current_frame (event, false);
 468                         }
 469
 470                         return true;
 471                 }
 472         }
 473
 474         return false;
 475 }
 476
 477 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 478 void
 479 Drag::abort ()
 480 {
 481         if (_item) {
 482                 _item->ungrab ();
 483         }
 484
 485         aborted (_move_threshold_passed);
 486
 487         _editor->stop_canvas_autoscroll ();
 488         _editor->verbose_cursor()->hide ();
 489 }
 490
 491 void
 492 Drag::show_verbose_cursor_time (framepos_t frame)
 493 {
 494         _editor->verbose_cursor()->set_time (frame);
 495         _editor->verbose_cursor()->show ();
 496 }
 497
 498 void
 499 Drag::show_verbose_cursor_duration (framepos_t start, framepos_t end, double /*xoffset*/)
 500 {
 501         _editor->verbose_cursor()->set_duration (start, end);
 502         _editor->verbose_cursor()->show ();
 503 }
 504
 505 void
 506 Drag::show_verbose_cursor_text (string const & text)
 507 {
 508         _editor->verbose_cursor()->set (text);
 509         _editor->verbose_cursor()->show ();
 510 }
 511
 512 boost::shared_ptr<Region>
 513 Drag::add_midi_region (MidiTimeAxisView* view, bool commit)
 514 {
 515         if (_editor->session()) {
 516                 const TempoMap& map (_editor->session()->tempo_map());
 517                 framecnt_t pos = grab_frame();
 518                 /* not that the frame rate used here can be affected by pull up/down which
 519                    might be wrong.
 520                 */
 521                 framecnt_t len = map.frame_at_beat (map.beat_at_frame (pos) + 1.0) - pos;
 522                 return view->add_region (grab_frame(), len, commit);
 523         }
 524
 525         return boost::shared_ptr<Region>();
 526 }
 527
 528 struct EditorOrderTimeAxisViewSorter {
 529         bool operator() (TimeAxisView* a, TimeAxisView* b) {
 530                 RouteTimeAxisView* ra = dynamic_cast<RouteTimeAxisView*> (a);
 531                 RouteTimeAxisView* rb = dynamic_cast<RouteTimeAxisView*> (b);
 532                 assert (ra && rb);
 533                 return ra->route()->order_key () < rb->route()->order_key ();
 534         }
 535 };
 536
 537 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 538         : Drag (e, i)
 539         , _primary (p)
 540         , _ntracks (0)
 541 {
 542         _editor->visible_order_range (&_visible_y_low, &_visible_y_high);
 543
 544         /* Make a list of tracks to refer to during the drag; we include hidden tracks,
 545            as some of the regions we are dragging may be on such tracks.
 546         */
 547
 548         TrackViewList track_views = _editor->track_views;
 549         track_views.sort (EditorOrderTimeAxisViewSorter ());
 550
 551         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 552                 _time_axis_views.push_back (*i);
 553
 554                 TimeAxisView::Children children_list = (*i)->get_child_list ();
 555                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 556                         _time_axis_views.push_back (j->get());
 557                 }
 558         }
 559
 560         /* the list of views can be empty at this point if this is a region list-insert drag
 561          */
 562
 563         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 564                 _views.push_back (DraggingView (*i, this, &(*i)->get_time_axis_view()));
 565         }
 566
 567         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), boost::bind (&RegionDrag::region_going_away, this, _1), gui_context());
 568 }
 569
 570 void
 571 RegionDrag::region_going_away (RegionView* v)
 572 {
 573         list<DraggingView>::iterator i = _views.begin ();
 574         while (i != _views.end() && i->view != v) {
 575                 ++i;
 576         }
 577
 578         if (i != _views.end()) {
 579                 _views.erase (i);
 580         }
 581 }
 582
 583 /** Given a TimeAxisView, return the index of it into the _time_axis_views vector,
 584  *  or -1 if it is not found.
 585  */
 586 int
 587 RegionDrag::find_time_axis_view (TimeAxisView* t) const
 588 {
 589         int i = 0;
 590         int const N = _time_axis_views.size ();
 591         while (i < N && _time_axis_views[i] != t) {
 592                 ++i;
 593         }
 594
 595         if (_time_axis_views[i] != t) {
 596                 return -1;
 597         }
 598
 599         return i;
 600 }
 601
 602 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 603         : RegionDrag (e, i, p, v)
 604         , _brushing (b)
 605         , _ignore_video_lock (false)
 606         , _total_x_delta (0)
 607         , _last_pointer_time_axis_view (0)
 608         , _last_pointer_layer (0)
 609         , _ndropzone (0)
 610         , _pdropzone (0)
 611         , _ddropzone (0)
 612 {
 613         DEBUG_TRACE (DEBUG::Drags, "New RegionMotionDrag\n");
 614 }
 615
 616 void
 617 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 618 {
 619         Drag::start_grab (event, cursor);
 620         setup_snap_delta (_last_frame_position);
 621
 622         show_verbose_cursor_time (_last_frame_position);
 623
 624         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (current_pointer_y ());
 625         if (tv.first) {
 626                 _last_pointer_time_axis_view = find_time_axis_view (tv.first);
 627                 assert(_last_pointer_time_axis_view >= 0);
 628                 _last_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
 629         }
 630
 631         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
 632                 _ignore_video_lock = true;
 633         }
 634
 635         if (_brushing) {
 636                 /* cross track dragging seems broken here. disabled for now. */
 637                 _y_constrained = true;
 638         }
 639 }
 640
 641 double
 642 RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
 643 {
 644         /* compute the amount of pointer motion in frames, and where
 645            the region would be if we moved it by that much.
 646         */
 647         *pending_region_position = adjusted_frame (_drags->current_pointer_frame (), event, false);
 648
 649         framepos_t sync_frame;
 650         framecnt_t sync_offset;
 651         int32_t sync_dir;
 652
 653         sync_offset = _primary->region()->sync_offset (sync_dir);
 654
 655         /* we don't handle a sync point that lies before zero.
 656          */
 657         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 658
 659                 framecnt_t const sd = snap_delta (event->button.state);
 660                 sync_frame = *pending_region_position + (sync_dir * sync_offset) + sd;
 661
 662                 _editor->snap_to_with_modifier (sync_frame, event);
 663
 664                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame) - sd;
 665
 666         } else {
 667                 *pending_region_position = _last_frame_position;
 668         }
 669
 670         if (*pending_region_position > max_framepos - _primary->region()->length()) {
 671                 *pending_region_position = _last_frame_position;
 672         }
 673
 674         double dx = 0;
 675
 676         bool const x_move_allowed = !_x_constrained;
 677
 678         if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
 679
 680                 /* x movement since last time (in pixels) */
 681                 dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->samples_per_pixel;
 682
 683                 /* total x movement */
 684                 framecnt_t total_dx = *pending_region_position;
 685                 if (regions_came_from_canvas()) {
 686                         total_dx = total_dx - grab_frame ();
 687                 }
 688
 689                 /* check that no regions have gone off the start of the session */
 690                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 691                         if ((i->view->region()->position() + total_dx) < 0) {
 692                                 dx = 0;
 693                                 *pending_region_position = _last_frame_position;
 694                                 break;
 695                         }
 696                 }
 697
 698         }
 699
 700         return dx;
 701 }
 702
 703 int
 704 RegionDrag::apply_track_delta (const int start, const int delta, const int skip, const bool distance_only) const
 705 {
 706         if (delta == 0) {
 707                 return start;
 708         }
 709
 710         const int tavsize  = _time_axis_views.size();
 711         const int dt = delta > 0 ? +1 : -1;
 712         int current  = start;
 713         int target   = start + delta - skip;
 714
 715         assert (current < 0 || current >= tavsize || !_time_axis_views[current]->hidden());
 716         assert (skip == 0 || (skip < 0 && delta < 0) || (skip > 0 && delta > 0));
 717
 718         while (current >= 0 && current != target) {
 719                 current += dt;
 720                 if (current < 0 && dt < 0) {
 721                         break;
 722                 }
 723                 if (current >= tavsize && dt > 0) {
 724                         break;
 725                 }
 726                 if (current < 0 || current >= tavsize) {
 727                         continue;
 728                 }
 729
 730                 RouteTimeAxisView const * rtav = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[current]);
 731                 if (_time_axis_views[current]->hidden() || !rtav || !rtav->is_track()) {
 732                         target += dt;
 733                 }
 734
 735                 if (distance_only && current == start + delta) {
 736                         break;
 737                 }
 738         }
 739         return target;
 740 }
 741
 742 bool
 743 RegionMotionDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
 744 {
 745         if (_y_constrained) {
 746                 return false;
 747         }
 748
 749         const int tavsize  = _time_axis_views.size();
 750         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 751                 int n = apply_track_delta (i->time_axis_view, delta_track, skip_invisible);
 752                 assert (n < 0 || n >= tavsize || !_time_axis_views[n]->hidden());
 753
 754                 if (i->time_axis_view < 0 || i->time_axis_view >= tavsize) {
 755                         /* already in the drop zone */
 756                         if (delta_track >= 0) {
 757                                 /* downward motion - OK if others are still not in the dropzone */
 758                                 continue;
 759                         }
 760
 761                 }
 762
 763                 if (n < 0) {
 764                         /* off the top */
 765                         return false;
 766                 } else if (n >= tavsize) {
 767                         /* downward motion into drop zone. That's fine. */
 768                         continue;
 769                 }
 770
 771                 RouteTimeAxisView const * to = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[n]);
 772                 if (to == 0 || to->hidden() || !to->is_track() || to->track()->data_type() != i->view->region()->data_type()) {
 773                         /* not a track, or the wrong type */
 774                         return false;
 775                 }
 776
 777                 double const l = i->layer + delta_layer;
 778
 779                 /* Note that we allow layer to be up to 0.5 below zero, as this is used by `Expanded'
 780                    mode to allow the user to place a region below another on layer 0.
 781                 */
 782                 if (delta_track == 0 && (l < -0.5 || l >= int (to->view()->layers()))) {
 783                         /* Off the top or bottom layer; note that we only refuse if the track hasn't changed.
 784                            If it has, the layers will be munged later anyway, so it's ok.
 785                         */
 786                         return false;
 787                 }
 788         }
 789
 790         /* all regions being dragged are ok with this change */
 791         return true;
 792 }
 793
 794 struct DraggingViewSorter {
 795         bool operator() (const DraggingView& a, const DraggingView& b) {
 796                 return a.time_axis_view < b.time_axis_view;
 797         }
 798 };
 799
 800 void
 801 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 802 {
 803         double delta_layer = 0;
 804         int delta_time_axis_view = 0;
 805         int current_pointer_time_axis_view = -1;
 806
 807         assert (!_views.empty ());
 808
 809         /* Note: time axis views in this method are often expressed as an index into the _time_axis_views vector */
 810
 811         /* Find the TimeAxisView that the pointer is now over */
 812         const double cur_y = current_pointer_y ();
 813         pair<TimeAxisView*, double> const r = _editor->trackview_by_y_position (cur_y);
 814         TimeAxisView* tv = r.first;
 815
 816         if (!tv && cur_y < 0) {
 817                 /* above trackview area, autoscroll hasn't moved us since last time, nothing to do */
 818                 return;
 819         }
 820
 821         /* find drop-zone y-position */
 822         Coord last_track_bottom_edge;
 823         last_track_bottom_edge = 0;
 824         for (std::vector<TimeAxisView*>::reverse_iterator t = _time_axis_views.rbegin(); t != _time_axis_views.rend(); ++t) {
 825                 if (!(*t)->hidden()) {
 826                         last_track_bottom_edge = (*t)->canvas_display()->canvas_origin ().y + (*t)->effective_height();
 827                         break;
 828                 }
 829         }
 830
 831         if (tv && tv->view()) {
 832                 /* the mouse is over a track */
 833                 double layer = r.second;
 834
 835                 if (first_move && tv->view()->layer_display() == Stacked) {
 836                         tv->view()->set_layer_display (Expanded);
 837                 }
 838
 839                 /* Here's the current pointer position in terms of time axis view and layer */
 840                 current_pointer_time_axis_view = find_time_axis_view (tv);
 841                 assert(current_pointer_time_axis_view >= 0);
 842
 843                 double const current_pointer_layer = tv->layer_display() == Overlaid ? 0 : layer;
 844
 845                 /* Work out the change in y */
 846
 847                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
 848                 if (!rtv || !rtv->is_track()) {
 849                         /* ignore busses early on. we can't move any regions on them */
 850                 } else if (_last_pointer_time_axis_view < 0) {
 851                         /* Was in the drop-zone, now over a track.
 852                          * Hence it must be an upward move (from the bottom)
 853                          *
 854                          * track_index is still -1, so delta must be set to
 855                          * move up the correct number of tracks from the bottom.
 856                          *
 857                          * This is necessary because steps may be skipped if
 858                          * the bottom-most track is not a valid target and/or
 859                          * if there are hidden tracks at the bottom.
 860                          * Hence the initial offset (_ddropzone) as well as the
 861                          * last valid pointer position (_pdropzone) need to be
 862                          * taken into account.
 863                          */
 864                         delta_time_axis_view = current_pointer_time_axis_view - _time_axis_views.size () + _ddropzone - _pdropzone;
 865                 } else {
 866                         delta_time_axis_view = current_pointer_time_axis_view - _last_pointer_time_axis_view;
 867                 }
 868
 869                 /* TODO needs adjustment per DraggingView,
 870                  *
 871                  * e.g. select one region on the top-layer of a track
 872                  * and one region which is at the bottom-layer of another track
 873                  * drag both.
 874                  *
 875                  * Indicated drop-zones and layering is wrong.
 876                  * and may infer additional layers on the target-track
 877                  * (depending how many layers the original track had).
 878                  *
 879                  * Or select two regions (different layers) on a same track,
 880                  * move across a non-layer track.. -> layering info is lost.
 881                  * on drop either of the regions may be on top.
 882                  *
 883                  * Proposed solution: screw it :) well,
 884                  *   don't use delta_layer, use an absolute value
 885                  *   1) remember DraggingView's layer  as float 0..1  [current layer / all layers of source]
 886                  *   2) calculate current mouse pos, y-pos inside track divided by height of mouse-over track.
 887                  *   3) iterate over all DraggingView, find the one that is over the track with most layers
 888                  *   4) proportionally scale layer to layers available on target
 889                  */
 890                 delta_layer = current_pointer_layer - _last_pointer_layer;
 891
 892         }
 893         /* for automation lanes, there is a TimeAxisView but no ->view()
 894          * if (!tv) -> dropzone
 895          */
 896         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view >= 0) {
 897                 /* Moving into the drop-zone.. */
 898                 delta_time_axis_view = _time_axis_views.size () - _last_pointer_time_axis_view;
 899                 /* delta_time_axis_view may not be sufficient to move into the DZ
 900                  * the mouse may enter it, but it may not be a valid move due to
 901                  * constraints.
 902                  *
 903                  * -> remember the delta needed to move into the dropzone
 904                  */
 905                 _ddropzone = delta_time_axis_view;
 906                 /* ..but subtract hidden tracks (or routes) at the bottom.
 907                  * we silently move mover them
 908                  */
 909                 _ddropzone -= apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 910                               - _time_axis_views.size();
 911         }
 912         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view < 0) {
 913                 /* move around inside the zone.
 914                  * This allows to move further down until all regions are in the zone.
 915                  */
 916                 const double ptr_y = cur_y + _editor->get_trackview_group()->canvas_origin().y;
 917                 assert(ptr_y >= last_track_bottom_edge);
 918                 assert(_ddropzone > 0);
 919
 920                 /* calculate mouse position in 'tracks' below last track. */
 921                 const double dzi_h = TimeAxisView::preset_height (HeightNormal);
 922                 uint32_t dzpos = _ddropzone + floor((1 + ptr_y - last_track_bottom_edge) / dzi_h);
 923
 924                 if (dzpos > _pdropzone && _ndropzone < _ntracks) {
 925                         // move further down
 926                         delta_time_axis_view =  dzpos - _pdropzone;
 927                 } else if (dzpos < _pdropzone && _ndropzone > 0) {
 928                         // move up inside the DZ
 929                         delta_time_axis_view =  dzpos - _pdropzone;
 930                 }
 931         }
 932
 933         /* Work out the change in x */
 934         framepos_t pending_region_position;
 935         double const x_delta = compute_x_delta (event, &pending_region_position);
 936         _last_frame_position = pending_region_position;
 937
 938         /* calculate hidden tracks in current y-axis delta */
 939         int delta_skip = 0;
 940         if (_last_pointer_time_axis_view < 0 && _pdropzone > 0) {
 941                 /* The mouse is more than one track below the dropzone.
 942                  * distance calculation is not needed (and would not work, either
 943                  * because the dropzone is "packed").
 944                  *
 945                  * Except when [partially] moving regions out of dropzone in a large step.
 946                  * (the mouse may or may not remain in the DZ)
 947                  * Hidden tracks at the bottom of the TAV need to be skipped.
 948                  *
 949                  * This also handles the case if the mouse entered the DZ
 950                  * in a large step (exessive delta), either due to fast-movement,
 951                  * autoscroll, laggy UI. _ddropzone copensates for that (see "move into dz" above)
 952                  */
 953                 if (delta_time_axis_view < 0 && (int)_ddropzone - delta_time_axis_view >= (int)_pdropzone) {
 954                         const int dt = delta_time_axis_view + (int)_pdropzone - (int)_ddropzone;
 955                         assert(dt <= 0);
 956                         delta_skip = apply_track_delta(_time_axis_views.size(), dt, 0, true)
 957                                 -_time_axis_views.size() - dt;
 958                 }
 959         }
 960         else if (_last_pointer_time_axis_view < 0) {
 961                 /* Moving out of the zone. Check for hidden tracks at the bottom. */
 962                 delta_skip = apply_track_delta(_time_axis_views.size(), delta_time_axis_view, 0, true)
 963                              -_time_axis_views.size() - delta_time_axis_view;
 964         } else {
 965                 /* calculate hidden tracks that are skipped by the pointer movement */
 966                 delta_skip = apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 967                              - _last_pointer_time_axis_view
 968                              - delta_time_axis_view;
 969         }
 970
 971         /* Verify change in y */
 972         if (!y_movement_allowed (delta_time_axis_view, delta_layer, delta_skip)) {
 973                 /* this y movement is not allowed, so do no y movement this time */
 974                 delta_time_axis_view = 0;
 975                 delta_layer = 0;
 976                 delta_skip = 0;
 977         }
 978
 979         if (x_delta == 0 && (tv && tv->view() && delta_time_axis_view == 0) && delta_layer == 0 && !first_move) {
 980                 /* haven't reached next snap point, and we're not switching
 981                    trackviews nor layers. nothing to do.
 982                 */
 983                 return;
 984         }
 985
 986         typedef map<boost::shared_ptr<Playlist>, double> PlaylistDropzoneMap;
 987         PlaylistDropzoneMap playlist_dropzone_map;
 988         _ndropzone = 0; // number of elements currently in the dropzone
 989
 990         if (first_move) {
 991                 /* sort views by time_axis.
 992                  * This retains track order in the dropzone, regardless
 993                  * of actual selection order
 994                  */
 995                 _views.sort (DraggingViewSorter());
 996
 997                 /* count number of distinct tracks of all regions
 998                  * being dragged, used for dropzone.
 999                  */
1000                 int prev_track = -1;
1001                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1002                         if (i->time_axis_view != prev_track) {
1003                                 prev_track = i->time_axis_view;
1004                                 ++_ntracks;
1005                         }
1006                 }
1007 #ifndef NDEBUG
1008                 int spread =
1009                         _views.back().time_axis_view -
1010                         _views.front().time_axis_view;
1011
1012                 spread -= apply_track_delta (_views.front().time_axis_view, spread, 0, true)
1013                           -  _views.back().time_axis_view;
1014
1015                 printf("Dragging region(s) from %d different track(s), max dist: %d\n", _ntracks, spread);
1016 #endif
1017         }
1018
1019         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1020
1021                 RegionView* rv = i->view;
1022                 double y_delta;
1023
1024                 y_delta = 0;
1025
1026                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1027                         continue;
1028                 }
1029
1030                 if (first_move) {
1031                         rv->drag_start ();
1032
1033                         /* reparent the regionview into a group above all
1034                          * others
1035                          */
1036
1037                         ArdourCanvas::Item* rvg = rv->get_canvas_group();
1038                         Duple rv_canvas_offset = rvg->parent()->canvas_origin ();
1039                         Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
1040                         rv->get_canvas_group()->reparent (_editor->_drag_motion_group);
1041                         /* move the item so that it continues to appear at the
1042                            same location now that its parent has changed.
1043                            */
1044                         rvg->move (rv_canvas_offset - dmg_canvas_offset);
1045                 }
1046
1047                 /* If we have moved tracks, we'll fudge the layer delta so that the
1048                    region gets moved back onto layer 0 on its new track; this avoids
1049                    confusion when dragging regions from non-zero layers onto different
1050                    tracks.
1051                 */
1052                 double this_delta_layer = delta_layer;
1053                 if (delta_time_axis_view != 0) {
1054                         this_delta_layer = - i->layer;
1055                 }
1056
1057                 int this_delta_time_axis_view = apply_track_delta(i->time_axis_view, delta_time_axis_view, delta_skip) - i->time_axis_view;
1058
1059                 int track_index = i->time_axis_view + this_delta_time_axis_view;
1060                 assert(track_index >= 0);
1061
1062                 if (track_index < 0 || track_index >= (int) _time_axis_views.size()) {
1063                         /* Track is in the Dropzone */
1064
1065                         i->time_axis_view = track_index;
1066                         assert(i->time_axis_view >= (int) _time_axis_views.size());
1067                         if (cur_y >= 0) {
1068
1069                                 double yposition = 0;
1070                                 PlaylistDropzoneMap::iterator pdz = playlist_dropzone_map.find (i->view->region()->playlist());
1071                                 rv->set_height (TimeAxisView::preset_height (HeightNormal));
1072                                 ++_ndropzone;
1073
1074                                 /* store index of each new playlist as a negative count, starting at -1 */
1075
1076                                 if (pdz == playlist_dropzone_map.end()) {
1077                                         /* compute where this new track (which doesn't exist yet) will live
1078                                            on the y-axis.
1079                                         */
1080                                         yposition = last_track_bottom_edge; /* where to place the top edge of the regionview */
1081
1082                                         /* How high is this region view ? */
1083
1084                                         boost::optional<ArdourCanvas::Rect> obbox = rv->get_canvas_group()->bounding_box ();
1085                                         ArdourCanvas::Rect bbox;
1086
1087                                         if (obbox) {
1088                                                 bbox = obbox.get ();
1089                                         }
1090
1091                                         last_track_bottom_edge += bbox.height();
1092
1093                                         playlist_dropzone_map.insert (make_pair (i->view->region()->playlist(), yposition));
1094
1095                                 } else {
1096                                         yposition = pdz->second;
1097                                 }
1098
1099                                 /* values are zero or negative, hence the use of min() */
1100                                 y_delta = yposition - rv->get_canvas_group()->canvas_origin().y;
1101                         }
1102
1103                 } else {
1104
1105                         /* The TimeAxisView that this region is now over */
1106                         TimeAxisView* current_tv = _time_axis_views[track_index];
1107
1108                         /* Ensure it is moved from stacked -> expanded if appropriate */
1109                         if (current_tv->view()->layer_display() == Stacked) {
1110                                 current_tv->view()->set_layer_display (Expanded);
1111                         }
1112
1113                         /* We're only allowed to go -ve in layer on Expanded views */
1114                         if (current_tv->view()->layer_display() != Expanded && (i->layer + this_delta_layer) < 0) {
1115                                 this_delta_layer = - i->layer;
1116                         }
1117
1118                         /* Set height */
1119                         rv->set_height (current_tv->view()->child_height ());
1120
1121                         /* Update show/hidden status as the region view may have come from a hidden track,
1122                            or have moved to one.
1123                         */
1124                         if (current_tv->hidden ()) {
1125                                 rv->get_canvas_group()->hide ();
1126                         } else {
1127                                 rv->get_canvas_group()->show ();
1128                         }
1129
1130                         /* Update the DraggingView */
1131                         i->time_axis_view = track_index;
1132                         i->layer += this_delta_layer;
1133
1134                         if (_brushing) {
1135                                 _editor->mouse_brush_insert_region (rv, pending_region_position);
1136                         } else {
1137                                 Duple track_origin;
1138
1139                                 /* Get the y coordinate of the top of the track that this region is now over */
1140                                 track_origin = current_tv->canvas_display()->item_to_canvas (track_origin);
1141
1142                                 /* And adjust for the layer that it should be on */
1143                                 StreamView* cv = current_tv->view ();
1144                                 switch (cv->layer_display ()) {
1145                                 case Overlaid:
1146                                         break;
1147                                 case Stacked:
1148                                         track_origin.y += (cv->layers() - i->layer - 1) * cv->child_height ();
1149                                         break;
1150                                 case Expanded:
1151                                         track_origin.y += (cv->layers() - i->layer - 0.5) * 2 * cv->child_height ();
1152                                         break;
1153                                 }
1154
1155                                 /* need to get the parent of the regionview
1156                                  * canvas group and get its position in
1157                                  * equivalent coordinate space as the trackview
1158                                  * we are now dragging over.
1159                                  */
1160
1161                                 y_delta = track_origin.y - rv->get_canvas_group()->canvas_origin().y;
1162
1163                         }
1164                 }
1165
1166                 /* Now move the region view */
1167                 rv->move (x_delta, y_delta);
1168
1169         } /* foreach region */
1170
1171         _total_x_delta += x_delta;
1172
1173         if (x_delta != 0 && !_brushing) {
1174                 show_verbose_cursor_time (_last_frame_position);
1175         }
1176
1177         /* keep track of pointer movement */
1178         if (tv) {
1179                 /* the pointer is currently over a time axis view */
1180
1181                 if (_last_pointer_time_axis_view < 0) {
1182                         /* last motion event was not over a time axis view
1183                          * or last y-movement out of the dropzone was not valid
1184                          */
1185                         int dtz = 0;
1186                         if (delta_time_axis_view < 0) {
1187                                 /* in the drop zone, moving up */
1188
1189                                 /* _pdropzone is the last known pointer y-axis position inside the DZ.
1190                                  * We do not use negative _last_pointer_time_axis_view because
1191                                  * the dropzone is "packed" (the actual track offset is ignored)
1192                                  *
1193                                  * As opposed to the actual number
1194                                  * of elements in the dropzone (_ndropzone)
1195                                  * _pdropzone is not constrained. This is necessary
1196                                  * to allow moving multiple regions with y-distance
1197                                  * into the DZ.
1198                                  *
1199                                  * There can be 0 elements in the dropzone,
1200                                  * even though the drag-pointer is inside the DZ.
1201                                  *
1202                                  * example:
1203                                  * [ Audio-track, Midi-track, Audio-track, DZ ]
1204                                  * move regions from both audio tracks at the same time into the
1205                                  * DZ by grabbing the region in the bottom track.
1206                                  */
1207                                 assert(current_pointer_time_axis_view >= 0);
1208                                 dtz = std::min((int)_pdropzone, (int)_ddropzone - delta_time_axis_view);
1209                                 _pdropzone -= dtz;
1210                         }
1211
1212                         /* only move out of the zone if the movement is OK */
1213                         if (_pdropzone == 0 && delta_time_axis_view != 0) {
1214                                 assert(delta_time_axis_view < 0);
1215                                 _last_pointer_time_axis_view = current_pointer_time_axis_view;
1216                                 /* if all logic and maths are correct, there is no need to assign the 'current' pointer.
1217                                  * the current position can be calculated as follows:
1218                                  */
1219                                 // a well placed oofus attack can still throw this off.
1220                                 // likley auto-scroll related, printf() debugging may tell, commented out for now.
1221                                 //assert (current_pointer_time_axis_view == _time_axis_views.size() - dtz + _ddropzone + delta_time_axis_view);
1222                         }
1223                 } else {
1224                         /* last motion event was also over a time axis view */
1225                         _last_pointer_time_axis_view += delta_time_axis_view;
1226                         assert(_last_pointer_time_axis_view >= 0);
1227                 }
1228
1229         } else {
1230
1231                 /* the pointer is not over a time axis view */
1232                 assert ((delta_time_axis_view > 0) || (((int)_pdropzone) >= (delta_skip - delta_time_axis_view)));
1233                 _pdropzone += delta_time_axis_view - delta_skip;
1234                 _last_pointer_time_axis_view = -1; // <0 : we're in the zone, value does not matter.
1235         }
1236
1237         _last_pointer_layer += delta_layer;
1238 }
1239
1240 void
1241 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
1242 {
1243         if (_copy && first_move) {
1244                 if (_x_constrained && !_brushing) {
1245                         _editor->begin_reversible_command (Operations::fixed_time_region_copy);
1246                 } else if (!_brushing) {
1247                         _editor->begin_reversible_command (Operations::region_copy);
1248                 } else if (_brushing) {
1249                         _editor->begin_reversible_command (Operations::drag_region_brush);
1250                 }
1251                 /* duplicate the regionview(s) and region(s) */
1252
1253                 list<DraggingView> new_regionviews;
1254
1255                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1256
1257                         RegionView* rv = i->view;
1258                         AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1259                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1260
1261                         const boost::shared_ptr<const Region> original = rv->region();
1262                         boost::shared_ptr<Region> region_copy = RegionFactory::create (original, true);
1263                         region_copy->set_position (original->position());
1264                         /* need to set this so that the drop zone code can work. This doesn't
1265                            actually put the region into the playlist, but just sets a weak pointer
1266                            to it.
1267                         */
1268                         region_copy->set_playlist (original->playlist());
1269
1270                         RegionView* nrv;
1271                         if (arv) {
1272                                 boost::shared_ptr<AudioRegion> audioregion_copy
1273                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1274
1275                                 nrv = new AudioRegionView (*arv, audioregion_copy);
1276                         } else if (mrv) {
1277                                 boost::shared_ptr<MidiRegion> midiregion_copy
1278                                         = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1279                                 nrv = new MidiRegionView (*mrv, midiregion_copy);
1280                         } else {
1281                                 continue;
1282                         }
1283
1284                         nrv->get_canvas_group()->show ();
1285                         new_regionviews.push_back (DraggingView (nrv, this, i->initial_time_axis_view));
1286
1287                         /* swap _primary to the copy */
1288
1289                         if (rv == _primary) {
1290                                 _primary = nrv;
1291                         }
1292
1293                         /* ..and deselect the one we copied */
1294
1295                         rv->set_selected (false);
1296                 }
1297
1298                 if (!new_regionviews.empty()) {
1299
1300                         /* reflect the fact that we are dragging the copies */
1301
1302                         _views = new_regionviews;
1303
1304                         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1305                 }
1306
1307         } else if (!_copy && first_move) {
1308                 if (_x_constrained && !_brushing) {
1309                         _editor->begin_reversible_command (_("fixed time region drag"));
1310                 } else if (!_brushing) {
1311                         _editor->begin_reversible_command (Operations::region_drag);
1312                 } else if (_brushing) {
1313                         _editor->begin_reversible_command (Operations::drag_region_brush);
1314                 }
1315         }
1316         RegionMotionDrag::motion (event, first_move);
1317 }
1318
1319 void
1320 RegionMotionDrag::finished (GdkEvent *, bool)
1321 {
1322         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1323                 if (!(*i)->view()) {
1324                         continue;
1325                 }
1326
1327                 if ((*i)->view()->layer_display() == Expanded) {
1328                         (*i)->view()->set_layer_display (Stacked);
1329                 }
1330         }
1331 }
1332
1333 void
1334 RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
1335 {
1336         RegionMotionDrag::finished (ev, movement_occurred);
1337
1338         if (!movement_occurred) {
1339
1340                 /* just a click */
1341
1342                 if (was_double_click() && !_views.empty()) {
1343                         DraggingView dv = _views.front();
1344                         dv.view->show_region_editor ();
1345
1346                 }
1347
1348                 return;
1349         }
1350
1351         assert (!_views.empty ());
1352
1353         /* We might have hidden region views so that they weren't visible during the drag
1354            (when they have been reparented).  Now everything can be shown again, as region
1355            views are back in their track parent groups.
1356         */
1357         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1358                 i->view->get_canvas_group()->show ();
1359         }
1360
1361         bool const changed_position = (_last_frame_position != _primary->region()->position());
1362         bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
1363         framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
1364
1365         if (_copy) {
1366
1367                 finished_copy (
1368                         changed_position,
1369                         changed_tracks,
1370                         drag_delta
1371                         );
1372
1373         } else {
1374
1375                 finished_no_copy (
1376                         changed_position,
1377                         changed_tracks,
1378                         drag_delta
1379                         );
1380
1381         }
1382
1383         _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
1384 }
1385
1386 RouteTimeAxisView*
1387 RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region, TimeAxisView* original)
1388 {
1389         /* Add a new track of the correct type, and return the RouteTimeAxisView that is created to display the
1390            new track.
1391          */
1392
1393         try {
1394                 if (boost::dynamic_pointer_cast<AudioRegion> (region)) {
1395                         list<boost::shared_ptr<AudioTrack> > audio_tracks;
1396                         uint32_t output_chan = region->n_channels();
1397                         if ((Config->get_output_auto_connect() & AutoConnectMaster) && _editor->session()->master_out()) {
1398                                 output_chan =  _editor->session()->master_out()->n_inputs().n_audio();
1399                         }
1400                         audio_tracks = _editor->session()->new_audio_track (region->n_channels(), output_chan, ARDOUR::Normal, 0, 1, region->name());
1401                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (audio_tracks.front());
1402                         if (rtav) {
1403                                 rtav->set_height (original->current_height());
1404                         }
1405                         return rtav;
1406                 } else {
1407                         ChanCount one_midi_port (DataType::MIDI, 1);
1408                         list<boost::shared_ptr<MidiTrack> > midi_tracks;
1409                         midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port, boost::shared_ptr<ARDOUR::PluginInfo>(), ARDOUR::Normal, 0, 1, region->name());
1410                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (midi_tracks.front());
1411                         if (rtav) {
1412                                 rtav->set_height (original->current_height());
1413                         }
1414                         return rtav;
1415                 }
1416         } catch (...) {
1417                 error << _("Could not create new track after region placed in the drop zone") << endmsg;
1418                 return 0;
1419         }
1420 }
1421
1422 void
1423 RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta)
1424 {
1425         RegionSelection new_views;
1426         PlaylistSet modified_playlists;
1427         RouteTimeAxisView* new_time_axis_view = 0;
1428
1429         if (_brushing) {
1430                 /* all changes were made during motion event handlers */
1431
1432                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1433                         delete i->view;
1434                 }
1435
1436                 _editor->commit_reversible_command ();
1437                 return;
1438         }
1439
1440         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1441         PlaylistMapping playlist_mapping;
1442
1443         /* insert the regions into their new playlists */
1444         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1445
1446                 RouteTimeAxisView* dest_rtv = 0;
1447
1448                 if (i->view->region()->locked() || (i->view->region()->video_locked() && !_ignore_video_lock)) {
1449                         continue;
1450                 }
1451
1452                 framepos_t where;
1453
1454                 if (changed_position && !_x_constrained) {
1455                         where = i->view->region()->position() - drag_delta;
1456                 } else {
1457                         where = i->view->region()->position();
1458                 }
1459
1460                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1461                         /* dragged to drop zone */
1462
1463                         PlaylistMapping::iterator pm;
1464
1465                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1466                                 /* first region from this original playlist: create a new track */
1467                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1468                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1469                                 dest_rtv = new_time_axis_view;
1470                         } else {
1471                                 /* we already created a new track for regions from this playlist, use it */
1472                                 dest_rtv = pm->second;
1473                         }
1474                 } else {
1475                         /* destination time axis view is the one we dragged to */
1476                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1477                 }
1478
1479                 if (dest_rtv != 0) {
1480                         RegionView* new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, modified_playlists);
1481                         if (new_view != 0) {
1482                                 new_views.push_back (new_view);
1483                         }
1484                 }
1485
1486                 /* Delete the copy of the view that was used for dragging. Need to play safe with the iterator
1487                    since deletion will automagically remove it from _views, thus invalidating i as an iterator.
1488                  */
1489
1490                 list<DraggingView>::const_iterator next = i;
1491                 ++next;
1492                 delete i->view;
1493                 i = next;
1494         }
1495
1496         /* If we've created new regions either by copying or moving
1497            to a new track, we want to replace the old selection with the new ones
1498         */
1499
1500         if (new_views.size() > 0) {
1501                 _editor->selection->set (new_views);
1502         }
1503
1504         /* write commands for the accumulated diffs for all our modified playlists */
1505         add_stateful_diff_commands_for_playlists (modified_playlists);
1506
1507         _editor->commit_reversible_command ();
1508 }
1509
1510 void
1511 RegionMoveDrag::finished_no_copy (
1512         bool const changed_position,
1513         bool const changed_tracks,
1514         framecnt_t const drag_delta
1515         )
1516 {
1517         RegionSelection new_views;
1518         PlaylistSet modified_playlists;
1519         PlaylistSet frozen_playlists;
1520         set<RouteTimeAxisView*> views_to_update;
1521         RouteTimeAxisView* new_time_axis_view = 0;
1522
1523         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1524         PlaylistMapping playlist_mapping;
1525
1526         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
1527
1528                 RegionView* rv = i->view;
1529                 RouteTimeAxisView* dest_rtv = 0;
1530
1531                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1532                         ++i;
1533                         continue;
1534                 }
1535
1536                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1537                         /* dragged to drop zone */
1538
1539                         PlaylistMapping::iterator pm;
1540
1541                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1542                                 /* first region from this original playlist: create a new track */
1543                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1544                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1545                                 dest_rtv = new_time_axis_view;
1546                         } else {
1547                                 /* we already created a new track for regions from this playlist, use it */
1548                                 dest_rtv = pm->second;
1549                         }
1550
1551                 } else {
1552                         /* destination time axis view is the one we dragged to */
1553                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1554                 }
1555
1556                 assert (dest_rtv);
1557
1558                 double const dest_layer = i->layer;
1559
1560                 views_to_update.insert (dest_rtv);
1561
1562                 framepos_t where;
1563
1564                 if (changed_position && !_x_constrained) {
1565                         where = rv->region()->position() - drag_delta;
1566                 } else {
1567                         where = rv->region()->position();
1568                 }
1569
1570                 if (changed_tracks) {
1571
1572                         /* insert into new playlist */
1573
1574                         RegionView* new_view = insert_region_into_playlist (
1575                                 RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, modified_playlists
1576                                 );
1577
1578                         if (new_view == 0) {
1579                                 ++i;
1580                                 continue;
1581                         }
1582
1583                         new_views.push_back (new_view);
1584
1585                         /* remove from old playlist */
1586
1587                         /* the region that used to be in the old playlist is not
1588                            moved to the new one - we use a copy of it. as a result,
1589                            any existing editor for the region should no longer be
1590                            visible.
1591                         */
1592                         rv->hide_region_editor();
1593
1594
1595                         remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
1596
1597                 } else {
1598
1599                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1600
1601                         /* this movement may result in a crossfade being modified, or a layering change,
1602                            so we need to get undo data from the playlist as well as the region.
1603                         */
1604
1605                         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (playlist);
1606                         if (r.second) {
1607                                 playlist->clear_changes ();
1608                         }
1609
1610                         rv->region()->clear_changes ();
1611
1612                         /*
1613                            motion on the same track. plonk the previously reparented region
1614                            back to its original canvas group (its streamview).
1615                            No need to do anything for copies as they are fake regions which will be deleted.
1616                         */
1617
1618                         rv->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1619                         rv->get_canvas_group()->set_y_position (i->initial_y);
1620                         rv->drag_end ();
1621
1622                         /* just change the model */
1623                         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1624                                 playlist->set_layer (rv->region(), dest_layer);
1625                         }
1626
1627                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
1628
1629                         r = frozen_playlists.insert (playlist);
1630
1631                         if (r.second) {
1632                                 playlist->freeze ();
1633                         }
1634
1635                         rv->region()->set_position (where);
1636                         _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
1637                 }
1638
1639                 if (changed_tracks) {
1640
1641                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1642                            was selected in all of them, then removing it from a playlist will have removed all
1643                            trace of it from _views (i.e. there were N regions selected, we removed 1,
1644                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1645                            corresponding regionview, and _views is now empty).
1646
1647                            This could have invalidated any and all iterators into _views.
1648
1649                            The heuristic we use here is: if the region selection is empty, break out of the loop
1650                            here. if the region selection is not empty, then restart the loop because we know that
1651                            we must have removed at least the region(view) we've just been working on as well as any
1652                            that we processed on previous iterations.
1653
1654                            EXCEPT .... if we are doing a copy drag, then _views hasn't been modified and
1655                            we can just iterate.
1656                         */
1657
1658
1659                         if (_views.empty()) {
1660                                 break;
1661                         } else {
1662                                 i = _views.begin();
1663                         }
1664
1665                 } else {
1666                         ++i;
1667                 }
1668         }
1669
1670         /* If we've created new regions either by copying or moving
1671            to a new track, we want to replace the old selection with the new ones
1672         */
1673
1674         if (new_views.size() > 0) {
1675                 _editor->selection->set (new_views);
1676         }
1677
1678         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1679                 (*p)->thaw();
1680         }
1681
1682         /* write commands for the accumulated diffs for all our modified playlists */
1683         add_stateful_diff_commands_for_playlists (modified_playlists);
1684         /* applies to _brushing */
1685         _editor->commit_reversible_command ();
1686
1687         /* We have futzed with the layering of canvas items on our streamviews.
1688            If any region changed layer, this will have resulted in the stream
1689            views being asked to set up their region views, and all will be well.
1690            If not, we might now have badly-ordered region views.  Ask the StreamViews
1691            involved to sort themselves out, just in case.
1692         */
1693
1694         for (set<RouteTimeAxisView*>::iterator i = views_to_update.begin(); i != views_to_update.end(); ++i) {
1695                 (*i)->view()->playlist_layered ((*i)->track ());
1696         }
1697 }
1698
1699 /** Remove a region from a playlist, clearing the diff history of the playlist first if necessary.
1700  *  @param region Region to remove.
1701  *  @param playlist playlist To remove from.
1702  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1703  *  that clear_changes () is only called once per playlist.
1704  */
1705 void
1706 RegionMoveDrag::remove_region_from_playlist (
1707         boost::shared_ptr<Region> region,
1708         boost::shared_ptr<Playlist> playlist,
1709         PlaylistSet& modified_playlists
1710         )
1711 {
1712         pair<set<boost::shared_ptr<Playlist> >::iterator, bool> r = modified_playlists.insert (playlist);
1713
1714         if (r.second) {
1715                 playlist->clear_changes ();
1716         }
1717
1718         playlist->remove_region (region); // should be no need to ripple; we better already have rippled the playlist in RegionRippleDrag
1719 }
1720
1721
1722 /** Insert a region into a playlist, handling the recovery of the resulting new RegionView, and
1723  *  clearing the playlist's diff history first if necessary.
1724  *  @param region Region to insert.
1725  *  @param dest_rtv Destination RouteTimeAxisView.
1726  *  @param dest_layer Destination layer.
1727  *  @param where Destination position.
1728  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1729  *  that clear_changes () is only called once per playlist.
1730  *  @return New RegionView, or 0 if no insert was performed.
1731  */
1732 RegionView *
1733 RegionMoveDrag::insert_region_into_playlist (
1734         boost::shared_ptr<Region> region,
1735         RouteTimeAxisView* dest_rtv,
1736         layer_t dest_layer,
1737         framecnt_t where,
1738         PlaylistSet& modified_playlists
1739         )
1740 {
1741         boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
1742         if (!dest_playlist) {
1743                 return 0;
1744         }
1745
1746         /* arrange to collect the new region view that will be created as a result of our playlist insertion */
1747         _new_region_view = 0;
1748         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &RegionMoveDrag::collect_new_region_view));
1749
1750         /* clear history for the playlist we are about to insert to, provided we haven't already done so */
1751         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (dest_playlist);
1752         if (r.second) {
1753                 dest_playlist->clear_changes ();
1754         }
1755
1756         dest_playlist->add_region (region, where);
1757
1758         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1759                 dest_playlist->set_layer (region, dest_layer);
1760         }
1761
1762         c.disconnect ();
1763
1764         assert (_new_region_view);
1765
1766         return _new_region_view;
1767 }
1768
1769 void
1770 RegionMoveDrag::collect_new_region_view (RegionView* rv)
1771 {
1772         _new_region_view = rv;
1773 }
1774
1775 void
1776 RegionMoveDrag::add_stateful_diff_commands_for_playlists (PlaylistSet const & playlists)
1777 {
1778         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1779                 StatefulDiffCommand* c = new StatefulDiffCommand (*i);
1780                 if (!c->empty()) {
1781                         _editor->session()->add_command (c);
1782                 } else {
1783                         delete c;
1784                 }
1785         }
1786 }
1787
1788
1789 void
1790 RegionMoveDrag::aborted (bool movement_occurred)
1791 {
1792         if (_copy) {
1793
1794                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1795                         list<DraggingView>::const_iterator next = i;
1796                         ++next;
1797                         delete i->view;
1798                         i = next;
1799                 }
1800
1801                 _views.clear ();
1802
1803         } else {
1804                 RegionMotionDrag::aborted (movement_occurred);
1805         }
1806 }
1807
1808 void
1809 RegionMotionDrag::aborted (bool)
1810 {
1811         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1812
1813                 StreamView* sview = (*i)->view();
1814
1815                 if (sview) {
1816                         if (sview->layer_display() == Expanded) {
1817                                 sview->set_layer_display (Stacked);
1818                         }
1819                 }
1820         }
1821
1822         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1823                 RegionView* rv = i->view;
1824                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1825                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1826                 assert (rtv);
1827                 rv->get_canvas_group()->reparent (rtv->view()->canvas_item());
1828                 rv->get_canvas_group()->set_y_position (0);
1829                 rv->drag_end ();
1830                 rv->move (-_total_x_delta, 0);
1831                 rv->set_height (rtv->view()->child_height ());
1832         }
1833 }
1834
1835 /** @param b true to brush, otherwise false.
1836  *  @param c true to make copies of the regions being moved, otherwise false.
1837  */
1838 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1839         : RegionMotionDrag (e, i, p, v, b)
1840         , _copy (c)
1841         , _new_region_view (0)
1842 {
1843         DEBUG_TRACE (DEBUG::Drags, "New RegionMoveDrag\n");
1844
1845         double speed = 1;
1846         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&_primary->get_time_axis_view ());
1847         if (rtv && rtv->is_track()) {
1848                 speed = rtv->track()->speed ();
1849         }
1850
1851         _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
1852 }
1853
1854 void
1855 RegionMoveDrag::setup_pointer_frame_offset ()
1856 {
1857         _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
1858 }
1859
1860 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
1861         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1862 {
1863         DEBUG_TRACE (DEBUG::Drags, "New RegionInsertDrag\n");
1864
1865         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1866                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1867
1868         _primary = v->view()->create_region_view (r, false, false);
1869
1870         _primary->get_canvas_group()->show ();
1871         _primary->set_position (pos, 0);
1872         _views.push_back (DraggingView (_primary, this, v));
1873
1874         _last_frame_position = pos;
1875
1876         _item = _primary->get_canvas_group ();
1877 }
1878
1879 void
1880 RegionInsertDrag::finished (GdkEvent *, bool)
1881 {
1882         int pos = _views.front().time_axis_view;
1883         assert(pos >= 0 && pos < (int)_time_axis_views.size());
1884
1885         RouteTimeAxisView* dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[pos]);
1886
1887         _primary->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1888         _primary->get_canvas_group()->set_y_position (0);
1889
1890         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1891
1892         _editor->begin_reversible_command (Operations::insert_region);
1893         playlist->clear_changes ();
1894         playlist->add_region (_primary->region (), _last_frame_position);
1895
1896         // Mixbus doesn't seem to ripple when inserting regions from the list: should we? yes, probably
1897         if (Config->get_edit_mode() == Ripple) {
1898                 playlist->ripple (_last_frame_position, _primary->region()->length(), _primary->region());
1899         }
1900
1901         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1902         _editor->commit_reversible_command ();
1903
1904         delete _primary;
1905         _primary = 0;
1906         _views.clear ();
1907 }
1908
1909 void
1910 RegionInsertDrag::aborted (bool)
1911 {
1912         delete _primary;
1913         _primary = 0;
1914         _views.clear ();
1915 }
1916
1917 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1918         : RegionMoveDrag (e, i, p, v, false, false)
1919 {
1920         DEBUG_TRACE (DEBUG::Drags, "New RegionSpliceDrag\n");
1921 }
1922
1923 struct RegionSelectionByPosition {
1924         bool operator() (RegionView*a, RegionView* b) {
1925                 return a->region()->position () < b->region()->position();
1926         }
1927 };
1928
1929 void
1930 RegionSpliceDrag::motion (GdkEvent* event, bool)
1931 {
1932         /* Which trackview is this ? */
1933
1934         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
1935         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1936
1937         /* The region motion is only processed if the pointer is over
1938            an audio track.
1939         */
1940
1941         if (!tv || !tv->is_track()) {
1942                 /* To make sure we hide the verbose canvas cursor when the mouse is
1943                    not held over an audio track.
1944                 */
1945                 _editor->verbose_cursor()->hide ();
1946                 return;
1947         } else {
1948                 _editor->verbose_cursor()->show ();
1949         }
1950
1951         int dir;
1952
1953         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1954                 dir = 1;
1955         } else {
1956                 dir = -1;
1957         }
1958
1959         RegionSelection copy;
1960         _editor->selection->regions.by_position(copy);
1961
1962         framepos_t const pf = adjusted_current_frame (event);
1963
1964         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1965
1966                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1967
1968                 if (!atv) {
1969                         continue;
1970                 }
1971
1972                 boost::shared_ptr<Playlist> playlist;
1973
1974                 if ((playlist = atv->playlist()) == 0) {
1975                         continue;
1976                 }
1977
1978                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1979                         continue;
1980                 }
1981
1982                 if (dir > 0) {
1983                         if (pf < (*i)->region()->last_frame() + 1) {
1984                                 continue;
1985                         }
1986                 } else {
1987                         if (pf > (*i)->region()->first_frame()) {
1988                                 continue;
1989                         }
1990                 }
1991
1992
1993                 playlist->shuffle ((*i)->region(), dir);
1994         }
1995 }
1996
1997 void
1998 RegionSpliceDrag::finished (GdkEvent* event, bool movement_occurred)
1999 {
2000         RegionMoveDrag::finished (event, movement_occurred);
2001 }
2002
2003 void
2004 RegionSpliceDrag::aborted (bool)
2005 {
2006         /* XXX: TODO */
2007 }
2008
2009 /***
2010  * ripple mode...
2011  */
2012
2013 void
2014 RegionRippleDrag::add_all_after_to_views(TimeAxisView *tav, framepos_t where, const RegionSelection &exclude, bool drag_in_progress)
2015 {
2016
2017         boost::shared_ptr<RegionList> rl = tav->playlist()->regions_with_start_within (Evoral::Range<framepos_t>(where, max_framepos));
2018
2019         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(tav);
2020         RegionSelection to_ripple;
2021         for (RegionList::iterator i = rl->begin(); i != rl->end(); ++i) {
2022                 if ((*i)->position() >= where) {
2023                         to_ripple.push_back (rtv->view()->find_view(*i));
2024                 }
2025         }
2026
2027         for (RegionSelection::iterator i = to_ripple.begin(); i != to_ripple.end(); ++i) {
2028                 if (!exclude.contains (*i)) {
2029                         // the selection has already been added to _views
2030
2031                         if (drag_in_progress) {
2032                                 // do the same things that RegionMotionDrag::motion does when
2033                                 // first_move is true, for the region views that we're adding
2034                                 // to _views this time
2035
2036                                 (*i)->drag_start();
2037                                 ArdourCanvas::Item* rvg = (*i)->get_canvas_group();
2038                                 Duple rv_canvas_offset = rvg->item_to_canvas (Duple (0,0));
2039                                 Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
2040                                 rvg->reparent (_editor->_drag_motion_group);
2041
2042                                 // we only need to move in the y direction
2043                                 Duple fudge = rv_canvas_offset - dmg_canvas_offset;
2044                                 fudge.x = 0;
2045                                 rvg->move (fudge);
2046
2047                         }
2048                         _views.push_back (DraggingView (*i, this, tav));
2049                 }
2050         }
2051 }
2052
2053 void
2054 RegionRippleDrag::remove_unselected_from_views(framecnt_t amount, bool move_regions)
2055 {
2056
2057         for (std::list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ) {
2058                 // we added all the regions after the selection
2059
2060                 std::list<DraggingView>::iterator to_erase = i++;
2061                 if (!_editor->selection->regions.contains (to_erase->view)) {
2062                         // restore the non-selected regions to their original playlist & positions,
2063                         // and then ripple them back by the length of the regions that were dragged away
2064                         // do the same things as RegionMotionDrag::aborted
2065
2066                         RegionView *rv = to_erase->view;
2067                         TimeAxisView* tv = &(rv->get_time_axis_view ());
2068                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
2069                         assert (rtv);
2070
2071                         // plonk them back onto their own track
2072                         rv->get_canvas_group()->reparent(rtv->view()->canvas_item());
2073                         rv->get_canvas_group()->set_y_position (0);
2074                         rv->drag_end ();
2075
2076                         if (move_regions) {
2077                                 // move the underlying region to match the view
2078                                 rv->region()->set_position (rv->region()->position() + amount);
2079                         } else {
2080                                 // restore the view to match the underlying region's original position
2081                                 rv->move(-amount, 0);   // second parameter is y delta - seems 0 is OK
2082                         }
2083
2084                         rv->set_height (rtv->view()->child_height ());
2085                         _views.erase (to_erase);
2086                 }
2087         }
2088 }
2089
2090 bool
2091 RegionRippleDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
2092 {
2093         if (RegionMotionDrag::y_movement_allowed (delta_track, delta_layer, skip_invisible)) {
2094                 if (delta_track) {
2095                         return allow_moves_across_tracks;
2096                 } else {
2097                         return true;
2098                 }
2099         }
2100         return false;
2101 }
2102
2103 RegionRippleDrag::RegionRippleDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2104         : RegionMoveDrag (e, i, p, v, false, false)
2105 {
2106         DEBUG_TRACE (DEBUG::Drags, "New RegionRippleDrag\n");
2107         // compute length of selection
2108         RegionSelection selected_regions = _editor->selection->regions;
2109         selection_length = selected_regions.end_frame() - selected_regions.start();
2110
2111         // we'll only allow dragging to another track in ripple mode if all the regions
2112         // being dragged start off on the same track
2113         allow_moves_across_tracks = (selected_regions.playlists().size() == 1);
2114         prev_tav = NULL;
2115         prev_amount = 0;
2116         exclude = new RegionList;
2117         for (RegionSelection::iterator i =selected_regions.begin(); i != selected_regions.end(); ++i) {
2118                 exclude->push_back((*i)->region());
2119         }
2120
2121         // also add regions before start of selection to exclude, to be consistent with how Mixbus does ripple
2122         RegionSelection copy;
2123         selected_regions.by_position(copy); // get selected regions sorted by position into copy
2124
2125         std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = copy.playlists();
2126         std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2127
2128         for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2129                 // find ripple start point on each applicable playlist
2130                 RegionView *first_selected_on_this_track = NULL;
2131                 for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
2132                         if ((*i)->region()->playlist() == (*pi)) {
2133                                 // region is on this playlist - it's the first, because they're sorted
2134                                 first_selected_on_this_track = *i;
2135                                 break;
2136                         }
2137                 }
2138                 assert (first_selected_on_this_track); // we should always find the region in one of the playlists...
2139                 add_all_after_to_views (
2140                                 &first_selected_on_this_track->get_time_axis_view(),
2141                                 first_selected_on_this_track->region()->position(),
2142                                 selected_regions, false);
2143         }
2144
2145         if (allow_moves_across_tracks) {
2146                 orig_tav = &(*selected_regions.begin())->get_time_axis_view();
2147         } else {
2148                 orig_tav = NULL;
2149         }
2150
2151 }
2152
2153 void
2154 RegionRippleDrag::motion (GdkEvent* event, bool first_move)
2155 {
2156         /* Which trackview is this ? */
2157
2158         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
2159         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
2160
2161         /* The region motion is only processed if the pointer is over
2162            an audio track.
2163          */
2164
2165         if (!tv || !tv->is_track()) {
2166                 /* To make sure we hide the verbose canvas cursor when the mouse is
2167                    not held over an audiotrack.
2168                  */
2169                 _editor->verbose_cursor()->hide ();
2170                 return;
2171         }
2172
2173         framepos_t where = adjusted_current_frame (event);
2174         assert (where >= 0);
2175         framepos_t after;
2176         double delta = compute_x_delta (event, &after);
2177
2178         framecnt_t amount = _editor->pixel_to_sample (delta);
2179
2180         if (allow_moves_across_tracks) {
2181                 // all the originally selected regions were on the same track
2182
2183                 framecnt_t adjust = 0;
2184                 if (prev_tav && tv != prev_tav) {
2185                         // dragged onto a different track
2186                         // remove the unselected regions from _views, restore them to their original positions
2187                         // and add the regions after the drop point on the new playlist to _views instead.
2188                         // undo the effect of rippling the previous playlist, and include the effect of removing
2189                         // the dragged region(s) from this track
2190
2191                         remove_unselected_from_views (prev_amount, false);
2192                         // ripple previous playlist according to the regions that have been removed onto the new playlist
2193                         prev_tav->playlist()->ripple(prev_position, -selection_length, exclude);
2194                         prev_amount = 0;
2195
2196                         // move just the selected regions
2197                         RegionMoveDrag::motion(event, first_move);
2198
2199                         // ensure that the ripple operation on the new playlist inserts selection_length time
2200                         adjust = selection_length;
2201                         // ripple the new current playlist
2202                         tv->playlist()->ripple (where, amount+adjust, exclude);
2203
2204                         // add regions after point where drag entered this track to subsequent ripples
2205                         add_all_after_to_views (tv, where, _editor->selection->regions, true);
2206
2207                 } else {
2208                         // motion on same track
2209                         RegionMoveDrag::motion(event, first_move);
2210                 }
2211                 prev_tav = tv;
2212
2213                 // remember what we've done to this playlist so we can undo it if the selection is dragged to another track
2214                 prev_position = where;
2215         } else {
2216                 // selection encompasses multiple tracks - just drag
2217                 // cross-track drags are forbidden
2218                 RegionMoveDrag::motion(event, first_move);
2219         }
2220
2221         if (!_x_constrained) {
2222                 prev_amount += amount;
2223         }
2224
2225         _last_frame_position = after;
2226 }
2227
2228 void
2229 RegionRippleDrag::finished (GdkEvent* event, bool movement_occurred)
2230 {
2231         if (!movement_occurred) {
2232
2233                 /* just a click */
2234
2235                 if (was_double_click() && !_views.empty()) {
2236                         DraggingView dv = _views.front();
2237                         dv.view->show_region_editor ();
2238
2239                 }
2240
2241                 return;
2242         }
2243
2244         _editor->begin_reversible_command(_("Ripple drag"));
2245
2246         // remove the regions being rippled from the dragging view, updating them to
2247         // their new positions
2248         remove_unselected_from_views (prev_amount, true);
2249
2250         if (allow_moves_across_tracks) {
2251                 if (orig_tav) {
2252                         // if regions were dragged across tracks, we've rippled any later
2253                         // regions on the track the regions were dragged off, so we need
2254                         // to add the original track to the undo record
2255                         orig_tav->playlist()->clear_changes();
2256                         vector<Command*> cmds;
2257                         orig_tav->playlist()->rdiff (cmds);
2258                         _editor->session()->add_commands (cmds);
2259                 }
2260                 if (prev_tav && prev_tav != orig_tav) {
2261                         prev_tav->playlist()->clear_changes();
2262                         vector<Command*> cmds;
2263                         prev_tav->playlist()->rdiff (cmds);
2264                         _editor->session()->add_commands (cmds);
2265                 }
2266         } else {
2267                 // selection spanned multiple tracks - all will need adding to undo record
2268
2269                 std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = _editor->selection->regions.playlists();
2270                 std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2271
2272                 for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2273                         (*pi)->clear_changes();
2274                         vector<Command*> cmds;
2275                         (*pi)->rdiff (cmds);
2276                         _editor->session()->add_commands (cmds);
2277                 }
2278         }
2279
2280         // other modified playlists are added to undo by RegionMoveDrag::finished()
2281         RegionMoveDrag::finished (event, movement_occurred);
2282         _editor->commit_reversible_command();
2283 }
2284
2285 void
2286 RegionRippleDrag::aborted (bool movement_occurred)
2287 {
2288         RegionMoveDrag::aborted (movement_occurred);
2289         _views.clear ();
2290 }
2291
2292
2293 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
2294         : Drag (e, i),
2295           _view (dynamic_cast<MidiTimeAxisView*> (v))
2296 {
2297         DEBUG_TRACE (DEBUG::Drags, "New RegionCreateDrag\n");
2298
2299         assert (_view);
2300 }
2301
2302 void
2303 RegionCreateDrag::motion (GdkEvent* event, bool first_move)
2304 {
2305         if (first_move) {
2306                 _editor->begin_reversible_command (_("create region"));
2307                 _region = add_midi_region (_view, false);
2308                 _view->playlist()->freeze ();
2309         } else {
2310                 if (_region) {
2311                         framepos_t const f = adjusted_current_frame (event);
2312                         if (f < grab_frame()) {
2313                                 _region->set_initial_position (f);
2314                         }
2315
2316                         /* Don't use a zero-length region, and subtract 1 frame from the snapped length
2317                            so that if this region is duplicated, its duplicate starts on
2318                            a snap point rather than 1 frame after a snap point.  Otherwise things get
2319                            a bit confusing as if a region starts 1 frame after a snap point, one cannot
2320                            place snapped notes at the start of the region.
2321                         */
2322
2323                         framecnt_t const len = (framecnt_t) fabs ((double)(f - grab_frame () - 1));
2324                         _region->set_length (len < 1 ? 1 : len);
2325                 }
2326         }
2327 }
2328
2329 void
2330 RegionCreateDrag::finished (GdkEvent*, bool movement_occurred)
2331 {
2332         if (!movement_occurred) {
2333                 add_midi_region (_view, true);
2334         } else {
2335                 _view->playlist()->thaw ();
2336                 _editor->commit_reversible_command();
2337         }
2338 }
2339
2340 void
2341 RegionCreateDrag::aborted (bool)
2342 {
2343         if (_region) {
2344                 _view->playlist()->thaw ();
2345         }
2346
2347         /* XXX */
2348 }
2349
2350 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
2351         : Drag (e, i)
2352         , region (0)
2353         , relative (false)
2354         , at_front (true)
2355         , _was_selected (false)
2356         , _snap_delta (0)
2357 {
2358         DEBUG_TRACE (DEBUG::Drags, "New NoteResizeDrag\n");
2359 }
2360
2361 void
2362 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
2363 {
2364         Gdk::Cursor* cursor;
2365         NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2366         assert (cnote);
2367         float x_fraction = cnote->mouse_x_fraction ();
2368
2369         if (x_fraction > 0.0 && x_fraction < 0.25) {
2370                 cursor = _editor->cursors()->left_side_trim;
2371                 at_front = true;
2372         } else  {
2373                 cursor = _editor->cursors()->right_side_trim;
2374                 at_front = false;
2375         }
2376
2377         Drag::start_grab (event, cursor);
2378
2379         region = &cnote->region_view();
2380
2381         double temp;
2382         temp = region->snap_to_pixel (cnote->x0 (), true);
2383         _snap_delta = temp - cnote->x0 ();
2384
2385         _item->grab ();
2386
2387         if (event->motion.state & ArdourKeyboard::note_size_relative_modifier ()) {
2388                 relative = false;
2389         } else {
2390                 relative = true;
2391         }
2392         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2393         if (ms.size() > 1) {
2394                 /* has to be relative, may make no sense otherwise */
2395                 relative = true;
2396         }
2397
2398         if (!(_was_selected = cnote->selected())) {
2399
2400                 /* tertiary-click means extend selection - we'll do that on button release,
2401                    so don't add it here, because otherwise we make it hard to figure
2402                    out the "extend-to" range.
2403                 */
2404
2405                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2406
2407                 if (!extend) {
2408                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2409
2410                         if (add) {
2411                                 region->note_selected (cnote, true);
2412                         } else {
2413                                 _editor->get_selection().clear_points();
2414                                 region->unique_select (cnote);
2415                         }
2416                 }
2417         }
2418 }
2419
2420 void
2421 NoteResizeDrag::motion (GdkEvent* event, bool first_move)
2422 {
2423         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2424         if (first_move) {
2425                 _editor->begin_reversible_command (_("resize notes"));
2426
2427                 for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
2428                         MidiRegionSelection::iterator next;
2429                         next = r;
2430                         ++next;
2431                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2432                         if (mrv) {
2433                                 mrv->begin_resizing (at_front);
2434                         }
2435                         r = next;
2436                 }
2437         }
2438
2439         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2440                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2441                 assert (nb);
2442                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2443                 if (mrv) {
2444                         double sd = 0.0;
2445                         bool snap = true;
2446                         bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2447
2448                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2449                                 if (_editor->snap_mode () != SnapOff) {
2450                                         snap = false;
2451                                 }
2452                         } else {
2453                                 if (_editor->snap_mode () == SnapOff) {
2454                                         snap = false;
2455                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2456                                         if (apply_snap_delta) {
2457                                                 snap = true;
2458                                         }
2459                                 }
2460                         }
2461
2462                         if (apply_snap_delta) {
2463                                 sd = _snap_delta;
2464                         }
2465
2466                         mrv->update_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2467                 }
2468         }
2469 }
2470
2471 void
2472 NoteResizeDrag::finished (GdkEvent* event, bool movement_occurred)
2473 {
2474         if (!movement_occurred) {
2475                 /* no motion - select note */
2476                 NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2477                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
2478                     _editor->current_mouse_mode() == Editing::MouseDraw) {
2479
2480                         bool changed = false;
2481
2482                         if (_was_selected) {
2483                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2484                                 if (add) {
2485                                         region->note_deselected (cnote);
2486                                         changed = true;
2487                                 } else {
2488                                         _editor->get_selection().clear_points();
2489                                         region->unique_select (cnote);
2490                                         changed = true;
2491                                 }
2492                         } else {
2493                                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2494                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2495
2496                                 if (!extend && !add && region->selection_size() > 1) {
2497                                         _editor->get_selection().clear_points();
2498                                         region->unique_select (cnote);
2499                                         changed = true;
2500                                 } else if (extend) {
2501                                         region->note_selected (cnote, true, true);
2502                                         changed = true;
2503                                 } else {
2504                                         /* it was added during button press */
2505                                         changed = true;
2506                                 }
2507                         }
2508
2509                         if (changed) {
2510                                 _editor->begin_reversible_selection_op(X_("Resize Select Note Release"));
2511                                 _editor->commit_reversible_selection_op();
2512                         }
2513                 }
2514
2515                 return;
2516         }
2517
2518         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2519         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2520                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2521                 assert (nb);
2522                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2523                 double sd = 0.0;
2524                 bool snap = true;
2525                 bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2526                 if (mrv) {
2527                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2528                                 if (_editor->snap_mode () != SnapOff) {
2529                                         snap = false;
2530                                 }
2531                         } else {
2532                                 if (_editor->snap_mode () == SnapOff) {
2533                                         snap = false;
2534                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2535                                         if (apply_snap_delta) {
2536                                                 snap = true;
2537                                         }
2538                                 }
2539                         }
2540
2541                         if (apply_snap_delta) {
2542                                 sd = _snap_delta;
2543                         }
2544
2545                         mrv->commit_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2546                 }
2547         }
2548
2549         _editor->commit_reversible_command ();
2550 }
2551
2552 void
2553 NoteResizeDrag::aborted (bool)
2554 {
2555         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2556         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2557                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2558                 if (mrv) {
2559                         mrv->abort_resizing ();
2560                 }
2561         }
2562 }
2563
2564 AVDraggingView::AVDraggingView (RegionView* v)
2565         : view (v)
2566 {
2567         initial_position = v->region()->position ();
2568 }
2569
2570 VideoTimeLineDrag::VideoTimeLineDrag (Editor* e, ArdourCanvas::Item* i)
2571         : Drag (e, i)
2572 {
2573         DEBUG_TRACE (DEBUG::Drags, "New VideoTimeLineDrag\n");
2574
2575         RegionSelection rs;
2576         TrackViewList empty;
2577         empty.clear();
2578         _editor->get_regions_after(rs, (framepos_t) 0, empty);
2579         std::list<RegionView*> views = rs.by_layer();
2580
2581         _stuck = false;
2582         for (list<RegionView*>::iterator i = views.begin(); i != views.end(); ++i) {
2583                 RegionView* rv = (*i);
2584                 if (!rv->region()->video_locked()) {
2585                         continue;
2586                 }
2587                 if (rv->region()->locked()) {
2588                         _stuck = true;
2589                 }
2590                 _views.push_back (AVDraggingView (rv));
2591         }
2592 }
2593
2594 void
2595 VideoTimeLineDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2596 {
2597         Drag::start_grab (event);
2598         if (_editor->session() == 0) {
2599                 return;
2600         }
2601
2602         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
2603                 _stuck = false;
2604                 _views.clear();
2605         }
2606
2607         if (_stuck) {
2608                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2609                 return;
2610         }
2611
2612         _startdrag_video_offset=ARDOUR_UI::instance()->video_timeline->get_offset();
2613         _max_backwards_drag = (
2614                           ARDOUR_UI::instance()->video_timeline->get_duration()
2615                         + ARDOUR_UI::instance()->video_timeline->get_offset()
2616                         - ceil(ARDOUR_UI::instance()->video_timeline->get_apv())
2617                         );
2618
2619         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2620                 if (i->initial_position < _max_backwards_drag || _max_backwards_drag < 0) {
2621                         _max_backwards_drag = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv (i->initial_position);
2622                 }
2623         }
2624         DEBUG_TRACE (DEBUG::Drags, string_compose("VideoTimeLineDrag: max backwards-drag: %1\n", _max_backwards_drag));
2625
2626         char buf[128];
2627         Timecode::Time timecode;
2628         _editor->session()->sample_to_timecode(abs(_startdrag_video_offset), timecode, true /* use_offset */, false /* use_subframes */ );
2629         snprintf (buf, sizeof (buf), "Video Start:\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, (_startdrag_video_offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
2630         show_verbose_cursor_text (buf);
2631 }
2632
2633 void
2634 VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
2635 {
2636         if (_editor->session() == 0) {
2637                 return;
2638         }
2639         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2640                 return;
2641         }
2642         if (_stuck) {
2643                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2644                 return;
2645         }
2646
2647         framecnt_t dt = adjusted_current_frame (event) - raw_grab_frame() + _pointer_frame_offset;
2648         dt = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv(_startdrag_video_offset+dt) - _startdrag_video_offset;
2649
2650         if (_max_backwards_drag >= 0 && dt <= - _max_backwards_drag) {
2651                 dt = - _max_backwards_drag;
2652         }
2653
2654         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset+dt);
2655         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2656
2657         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2658                 RegionView* rv = i->view;
2659                 DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
2660                 if (first_move) {
2661                         rv->drag_start ();
2662                         rv->region()->clear_changes ();
2663                         rv->region()->suspend_property_changes();
2664                 }
2665                 rv->region()->set_position(i->initial_position + dt);
2666                 rv->region_changed(ARDOUR::Properties::position);
2667         }
2668
2669         const framepos_t offset = ARDOUR_UI::instance()->video_timeline->get_offset();
2670         Timecode::Time timecode;
2671         Timecode::Time timediff;
2672         char buf[128];
2673         _editor->session()->sample_to_timecode(abs(offset), timecode, true /* use_offset */, false /* use_subframes */ );
2674         _editor->session()->sample_to_timecode(abs(dt), timediff, false /* use_offset */, false /* use_subframes */ );
2675         snprintf (buf, sizeof (buf),
2676                         "%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2677                         "\n%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2678                         , _("Video Start:"),
2679                                 (offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames
2680                         , _("Diff:"),
2681                                 (dt<0?'-':' '), timediff.hours, timediff.minutes, timediff.seconds, timediff.frames
2682                                 );
2683         show_verbose_cursor_text (buf);
2684 }
2685
2686 void
2687 VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
2688 {
2689         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2690                 return;
2691         }
2692         if (_stuck) {
2693                 return;
2694         }
2695
2696         if (!movement_occurred || ! _editor->session()) {
2697                 return;
2698         }
2699
2700         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2701
2702         _editor->begin_reversible_command (_("Move Video"));
2703
2704         XMLNode &before = ARDOUR_UI::instance()->video_timeline->get_state();
2705         ARDOUR_UI::instance()->video_timeline->save_undo();
2706         XMLNode &after = ARDOUR_UI::instance()->video_timeline->get_state();
2707         _editor->session()->add_command(new MementoCommand<VideoTimeLine>(*(ARDOUR_UI::instance()->video_timeline), &before, &after));
2708
2709         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2710                 i->view->drag_end();
2711                 i->view->region()->resume_property_changes ();
2712
2713                 _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
2714         }
2715
2716         _editor->session()->maybe_update_session_range(
2717                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset(), (ARDOUR::frameoffset_t) 0),
2718                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset() + ARDOUR_UI::instance()->video_timeline->get_duration(), (ARDOUR::frameoffset_t) 0)
2719                         );
2720
2721
2722         _editor->commit_reversible_command ();
2723 }
2724
2725 void
2726 VideoTimeLineDrag::aborted (bool)
2727 {
2728         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2729                 return;
2730         }
2731         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset);
2732         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2733
2734         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2735                 i->view->region()->resume_property_changes ();
2736                 i->view->region()->set_position(i->initial_position);
2737         }
2738 }
2739
2740 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool preserve_fade_anchor)
2741         : RegionDrag (e, i, p, v)
2742         , _operation (StartTrim)
2743         , _preserve_fade_anchor (preserve_fade_anchor)
2744         , _jump_position_when_done (false)
2745 {
2746         DEBUG_TRACE (DEBUG::Drags, "New TrimDrag\n");
2747 }
2748
2749 void
2750 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2751 {
2752         double speed = 1.0;
2753         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2754         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2755
2756         if (tv && tv->is_track()) {
2757                 speed = tv->track()->speed();
2758         }
2759
2760         framepos_t const region_start = (framepos_t) (_primary->region()->position() / speed);
2761         framepos_t const region_end = (framepos_t) (_primary->region()->last_frame() / speed);
2762         framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
2763
2764         framepos_t const pf = adjusted_current_frame (event);
2765         setup_snap_delta (region_start);
2766
2767         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_contents_modifier ())) {
2768                 /* Move the contents of the region around without changing the region bounds */
2769                 _operation = ContentsTrim;
2770                 Drag::start_grab (event, _editor->cursors()->trimmer);
2771         } else {
2772                 /* These will get overridden for a point trim.*/
2773                 if (pf < (region_start + region_length/2)) {
2774                         /* closer to front */
2775                         _operation = StartTrim;
2776                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2777                                 Drag::start_grab (event, _editor->cursors()->anchored_left_side_trim);
2778                         } else {
2779                                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
2780                         }
2781                 } else {
2782                         /* closer to end */
2783                         _operation = EndTrim;
2784                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2785                                 Drag::start_grab (event, _editor->cursors()->anchored_right_side_trim);
2786                         } else {
2787                                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
2788                         }
2789                 }
2790         }
2791         /* jump trim disabled for now
2792         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::trim_jump_modifier ())) {
2793                 _jump_position_when_done = true;
2794         }
2795         */
2796
2797         switch (_operation) {
2798         case StartTrim:
2799                 show_verbose_cursor_time (region_start);
2800                 break;
2801         case EndTrim:
2802                 show_verbose_cursor_duration (region_start, region_end);
2803                 break;
2804         case ContentsTrim:
2805                 show_verbose_cursor_time (pf);
2806                 break;
2807         }
2808
2809         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2810                 i->view->region()->suspend_property_changes ();
2811         }
2812 }
2813
2814 void
2815 TrimDrag::motion (GdkEvent* event, bool first_move)
2816 {
2817         RegionView* rv = _primary;
2818
2819         double speed = 1.0;
2820         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2821         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2822         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
2823         frameoffset_t frame_delta = 0;
2824
2825         if (tv && tv->is_track()) {
2826                 speed = tv->track()->speed();
2827         }
2828         framecnt_t adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
2829         framecnt_t dt = adj_frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
2830
2831         if (first_move) {
2832
2833                 string trim_type;
2834
2835                 switch (_operation) {
2836                 case StartTrim:
2837                         trim_type = "Region start trim";
2838                         break;
2839                 case EndTrim:
2840                         trim_type = "Region end trim";
2841                         break;
2842                 case ContentsTrim:
2843                         trim_type = "Region content trim";
2844                         break;
2845                 default:
2846                         assert(0);
2847                         break;
2848                 }
2849
2850                 _editor->begin_reversible_command (trim_type);
2851
2852                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2853                         RegionView* rv = i->view;
2854                         rv->enable_display (false);
2855                         rv->region()->playlist()->clear_owned_changes ();
2856
2857                         if (_operation == StartTrim) {
2858                                 rv->trim_front_starting ();
2859                         }
2860
2861                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
2862
2863                         if (arv) {
2864                                 arv->temporarily_hide_envelope ();
2865                                 arv->drag_start ();
2866                         }
2867
2868                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
2869                         insert_result = _editor->motion_frozen_playlists.insert (pl);
2870
2871                         if (insert_result.second) {
2872                                 pl->freeze();
2873                         }
2874                 }
2875         }
2876
2877         bool non_overlap_trim = false;
2878
2879         if (event && Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::trim_overlap_modifier ())) {
2880                 non_overlap_trim = true;
2881         }
2882
2883         /* contstrain trim to fade length */
2884         if (_preserve_fade_anchor) {
2885                 switch (_operation) {
2886                         case StartTrim:
2887                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2888                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2889                                         if (!arv) continue;
2890                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2891                                         if (ar->locked()) continue;
2892                                         framecnt_t len = ar->fade_in()->back()->when;
2893                                         if (len < dt) dt = min(dt, len);
2894                                 }
2895                                 break;
2896                         case EndTrim:
2897                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2898                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2899                                         if (!arv) continue;
2900                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2901                                         if (ar->locked()) continue;
2902                                         framecnt_t len = ar->fade_out()->back()->when;
2903                                         if (len < -dt) dt = max(dt, -len);
2904                                 }
2905                                 break;
2906                         case ContentsTrim:
2907                                 break;
2908                 }
2909         }
2910
2911
2912         switch (_operation) {
2913         case StartTrim:
2914                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2915                         bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim);
2916                         if (changed && _preserve_fade_anchor) {
2917                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2918                                 if (arv) {
2919                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2920                                         framecnt_t len = ar->fade_in()->back()->when;
2921                                         framecnt_t diff = ar->first_frame() - i->initial_position;
2922                                         framepos_t new_length = len - diff;
2923                                         i->anchored_fade_length = min (ar->length(), new_length);
2924                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
2925                                         arv->reset_fade_in_shape_width (ar, i->anchored_fade_length, true);
2926                                 }
2927                         }
2928                 }
2929                 break;
2930
2931         case EndTrim:
2932                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2933                         bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim);
2934                         if (changed && _preserve_fade_anchor) {
2935                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2936                                 if (arv) {
2937                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2938                                         framecnt_t len = ar->fade_out()->back()->when;
2939                                         framecnt_t diff = 1 + ar->last_frame() - i->initial_end;
2940                                         framepos_t new_length = len + diff;
2941                                         i->anchored_fade_length = min (ar->length(), new_length);
2942                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
2943                                         arv->reset_fade_out_shape_width (ar, i->anchored_fade_length, true);
2944                                 }
2945                         }
2946                 }
2947                 break;
2948
2949         case ContentsTrim:
2950                 {
2951                         frame_delta = (last_pointer_frame() - adjusted_current_frame(event));
2952
2953                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2954                                 i->view->move_contents (frame_delta);
2955                         }
2956                 }
2957                 break;
2958         }
2959
2960         switch (_operation) {
2961         case StartTrim:
2962                 show_verbose_cursor_time ((framepos_t) (rv->region()->position() / speed));
2963                 break;
2964         case EndTrim:
2965                 show_verbose_cursor_duration ((framepos_t)  rv->region()->position() / speed, (framepos_t) rv->region()->last_frame() / speed);
2966                 break;
2967         case ContentsTrim:
2968                 // show_verbose_cursor_time (frame_delta);
2969                 break;
2970         }
2971 }
2972
2973 void
2974 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
2975 {
2976         if (movement_occurred) {
2977                 motion (event, false);
2978
2979                 if (_operation == StartTrim) {
2980                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2981                                 {
2982                                         /* This must happen before the region's StatefulDiffCommand is created, as it may
2983                                            `correct' (ahem) the region's _start from being negative to being zero.  It
2984                                            needs to be zero in the undo record.
2985                                         */
2986                                         i->view->trim_front_ending ();
2987                                 }
2988                                 if (_preserve_fade_anchor) {
2989                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2990                                         if (arv) {
2991                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2992                                                 arv->reset_fade_in_shape_width (ar, i->anchored_fade_length);
2993                                                 ar->set_fade_in_length(i->anchored_fade_length);
2994                                                 ar->set_fade_in_active(true);
2995                                         }
2996                                 }
2997                                 if (_jump_position_when_done) {
2998                                         i->view->region()->set_position (i->initial_position);
2999                                 }
3000                         }
3001                 } else if (_operation == EndTrim) {
3002                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3003                                 if (_preserve_fade_anchor) {
3004                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
3005                                         if (arv) {
3006                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
3007                                                 arv->reset_fade_out_shape_width (ar, i->anchored_fade_length);
3008                                                 ar->set_fade_out_length(i->anchored_fade_length);
3009                                                 ar->set_fade_out_active(true);
3010                                         }
3011                                 }
3012                                 if (_jump_position_when_done) {
3013                                         i->view->region()->set_position (i->initial_end - i->view->region()->length());
3014                                 }
3015                         }
3016                 }
3017
3018                 if (!_views.empty()) {
3019                         if (_operation == StartTrim) {
3020                                 _editor->maybe_locate_with_edit_preroll(
3021                                         _views.begin()->view->region()->position());
3022                         }
3023                         if (_operation == EndTrim) {
3024                                 _editor->maybe_locate_with_edit_preroll(
3025                                         _views.begin()->view->region()->position() +
3026                                         _views.begin()->view->region()->length());
3027                         }
3028                 }
3029
3030                 if (!_editor->selection->selected (_primary)) {
3031                         _primary->thaw_after_trim ();
3032                 } else {
3033
3034                         set<boost::shared_ptr<Playlist> > diffed_playlists;
3035
3036                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3037                                 i->view->thaw_after_trim ();
3038                                 i->view->enable_display (true);
3039
3040                                 /* Trimming one region may affect others on the playlist, so we need
3041                                    to get undo Commands from the whole playlist rather than just the
3042                                    region.  Use diffed_playlists to make sure we don't diff a given
3043                                    playlist more than once.
3044                                 */
3045                                 boost::shared_ptr<Playlist> p = i->view->region()->playlist ();
3046                                 if (diffed_playlists.find (p) == diffed_playlists.end()) {
3047                                         vector<Command*> cmds;
3048                                         p->rdiff (cmds);
3049                                         _editor->session()->add_commands (cmds);
3050                                         diffed_playlists.insert (p);
3051                                 }
3052                         }
3053                 }
3054
3055                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
3056                         (*p)->thaw ();
3057                 }
3058
3059                 _editor->motion_frozen_playlists.clear ();
3060                 _editor->commit_reversible_command();
3061
3062         } else {
3063                 /* no mouse movement */
3064                 if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false)) {
3065                         _editor->point_trim (event, adjusted_current_frame (event));
3066                 }
3067         }
3068
3069         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3070                 i->view->region()->resume_property_changes ();
3071         }
3072 }
3073
3074 void
3075 TrimDrag::aborted (bool movement_occurred)
3076 {
3077         /* Our motion method is changing model state, so use the Undo system
3078            to cancel.  Perhaps not ideal, as this will leave an Undo point
3079            behind which may be slightly odd from the user's point of view.
3080         */
3081
3082         finished (0, true);
3083
3084         if (movement_occurred) {
3085                 _editor->undo ();
3086         }
3087
3088         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3089                 i->view->region()->resume_property_changes ();
3090         }
3091 }
3092
3093 void
3094 TrimDrag::setup_pointer_frame_offset ()
3095 {
3096         list<DraggingView>::iterator i = _views.begin ();
3097         while (i != _views.end() && i->view != _primary) {
3098                 ++i;
3099         }
3100
3101         if (i == _views.end()) {
3102                 return;
3103         }
3104
3105         switch (_operation) {
3106         case StartTrim:
3107                 _pointer_frame_offset = raw_grab_frame() - i->initial_position;
3108                 break;
3109         case EndTrim:
3110                 _pointer_frame_offset = raw_grab_frame() - i->initial_end;
3111                 break;
3112         case ContentsTrim:
3113                 break;
3114         }
3115 }
3116
3117 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3118         : Drag (e, i),
3119           _copy (c)
3120         , before_state (0)
3121 {
3122         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3123         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3124         assert (_marker);
3125         _real_section = &_marker->meter();
3126
3127 }
3128
3129 void
3130 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3131 {
3132         Drag::start_grab (event, cursor);
3133         show_verbose_cursor_time (adjusted_current_frame(event));
3134 }
3135
3136 void
3137 MeterMarkerDrag::setup_pointer_frame_offset ()
3138 {
3139         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3140 }
3141
3142 void
3143 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3144 {
3145         if (first_move) {
3146
3147                 // create a dummy marker to catch events, then hide it.
3148
3149                 char name[64];
3150                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3151
3152                 _marker = new MeterMarker (
3153                         *_editor,
3154                         *_editor->meter_group,
3155                         UIConfiguration::instance().color ("meter marker"),
3156                         name,
3157                         *new MeterSection (_marker->meter())
3158                 );
3159
3160                 /* use the new marker for the grab */
3161                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3162                 _marker->hide();
3163
3164                 TempoMap& map (_editor->session()->tempo_map());
3165                 /* get current state */
3166                 before_state = &map.get_state();
3167
3168                 if (!_copy) {
3169                         _editor->begin_reversible_command (_("move meter mark"));
3170                 } else {
3171                         _editor->begin_reversible_command (_("copy meter mark"));
3172
3173                         Timecode::BBT_Time bbt = _real_section->bbt();
3174
3175                         /* we can't add a meter where one currently exists */
3176                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3177                                 ++bbt.bars;
3178                         } else {
3179                                 --bbt.bars;
3180                         }
3181                         const double beat = map.beat_at_bbt (bbt);
3182                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3183                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3184
3185                 }
3186         }
3187
3188         framepos_t pf = adjusted_current_frame (event);
3189
3190         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3191                 /* never snap to music for audio locked */
3192                 pf = adjusted_current_frame (event, false);
3193         }
3194
3195         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3196
3197         setup_pointer_frame_offset ();
3198
3199         /* marker meeds to stay under the mouse, unlike the real section. */
3200         _marker->set_position (adjusted_current_frame (event, false));
3201
3202         show_verbose_cursor_time (_real_section->frame());
3203 }
3204
3205 void
3206 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3207 {
3208         if (!movement_occurred) {
3209                 if (was_double_click()) {
3210                         _editor->edit_meter_marker (*_marker);
3211                 }
3212                 return;
3213         }
3214
3215         TempoMap& map (_editor->session()->tempo_map());
3216
3217         XMLNode &after = map.get_state();
3218         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3219         _editor->commit_reversible_command ();
3220
3221         // delete the dummy marker we used for visual representation while moving.
3222         // a new visual marker will show up automatically.
3223         delete _marker;
3224 }
3225
3226 void
3227 MeterMarkerDrag::aborted (bool moved)
3228 {
3229         _marker->set_position (_marker->meter().frame ());
3230         if (moved) {
3231                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3232                 // delete the dummy marker we used for visual representation while moving.
3233                 // a new visual marker will show up automatically.
3234                 delete _marker;
3235         }
3236 }
3237
3238 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3239         : Drag (e, i)
3240         , _copy (c)
3241         , before_state (0)
3242 {
3243         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3244
3245         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3246         _real_section = &_marker->tempo();
3247         _movable = _real_section->movable();
3248         assert (_marker);
3249 }
3250
3251 void
3252 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3253 {
3254         Drag::start_grab (event, cursor);
3255         if (!_real_section->active()) {
3256                 show_verbose_cursor_text (_("inactive"));
3257         } else {
3258                 show_verbose_cursor_time (adjusted_current_frame (event));
3259         }
3260 }
3261
3262 void
3263 TempoMarkerDrag::setup_pointer_frame_offset ()
3264 {
3265         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3266 }
3267
3268 void
3269 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3270 {
3271         if (!_real_section->active()) {
3272                 return;
3273         }
3274
3275         if (first_move) {
3276
3277                 // mvc drag - create a dummy marker to catch events, hide it.
3278
3279                 char name[64];
3280                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3281
3282                 TempoSection section (_marker->tempo());
3283
3284                 _marker = new TempoMarker (
3285                         *_editor,
3286                         *_editor->tempo_group,
3287                         UIConfiguration::instance().color ("tempo marker"),
3288                         name,
3289                         *new TempoSection (_marker->tempo())
3290                         );
3291
3292                 /* use the new marker for the grab */
3293                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3294                 _marker->hide();
3295
3296                 TempoMap& map (_editor->session()->tempo_map());
3297                 /* get current state */
3298                 before_state = &map.get_state();
3299
3300                 if (!_copy) {
3301                         _editor->begin_reversible_command (_("move tempo mark"));
3302
3303                 } else {
3304                         const framepos_t frame = adjusted_current_frame (event) + 1;
3305
3306                         _editor->begin_reversible_command (_("copy tempo mark"));
3307
3308                         if (_real_section->position_lock_style() == MusicTime) {
3309                                 _real_section = map.add_tempo (_marker->tempo(), map.pulse_at_frame (frame), 0, _real_section->type(), MusicTime);
3310                         } else {
3311                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3312                         }
3313                 }
3314
3315         }
3316
3317         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3318                 /* use vertical movement to alter tempo .. should be log */
3319                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3320                 stringstream strs;
3321
3322                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3323                 strs << new_bpm;
3324                 show_verbose_cursor_text (strs.str());
3325
3326         } else if (_movable && !_real_section->locked_to_meter()) {
3327                 TempoMap& map (_editor->session()->tempo_map());
3328                 const bool was_music = _real_section->position_lock_style() == MusicTime;
3329
3330                 const framepos_t pf = adjusted_current_frame (event);
3331
3332                 if (!_editor->snap_musical()) {
3333
3334                         if (was_music) {
3335                                 _real_section->set_position_lock_style (AudioTime);
3336                         }
3337
3338                         map.gui_move_tempo (_real_section, pf);
3339
3340                         if (was_music) {
3341                                 _real_section->set_position_lock_style (MusicTime);
3342                         }
3343
3344                 } else {
3345
3346                         if (!was_music) {
3347                                 _real_section->set_position_lock_style (MusicTime);
3348                         }
3349
3350                         map.gui_move_tempo (_real_section, pf);
3351
3352                         if (!was_music) {
3353                                 _real_section->set_position_lock_style (AudioTime);
3354                         }
3355                 }
3356
3357                 show_verbose_cursor_time (_real_section->frame());
3358         }
3359
3360         /* this has moved the bar lines themselves, so recalibrate the offset */
3361         setup_pointer_frame_offset();
3362
3363         _marker->set_position (adjusted_current_frame (event, false));
3364 }
3365
3366 void
3367 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3368 {
3369         if (!_real_section->active()) {
3370                 return;
3371         }
3372         if (!movement_occurred) {
3373                 if (was_double_click()) {
3374                         _editor->edit_tempo_marker (*_marker);
3375                 }
3376                 return;
3377         }
3378
3379         TempoMap& map (_editor->session()->tempo_map());
3380
3381         XMLNode &after = map.get_state();
3382         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3383         _editor->commit_reversible_command ();
3384
3385         // delete the dummy marker we used for visual representation while moving.
3386         // a new visual marker will show up automatically.
3387         delete _marker;
3388 }
3389
3390 void
3391 TempoMarkerDrag::aborted (bool moved)
3392 {
3393         _marker->set_position (_marker->tempo().frame());
3394         if (moved) {
3395                 TempoMap& map (_editor->session()->tempo_map());
3396                 map.set_state (*before_state, Stateful::current_state_version);
3397                 // delete the dummy marker we used for visual representation while moving.
3398                 // a new visual marker will show up automatically.
3399                 delete _marker;
3400         }
3401 }
3402
3403 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3404         : Drag (e, i)
3405         , _pulse (0.0)
3406         , _beat (0.0)
3407         , _tempo (0)
3408         , before_state (0)
3409 {
3410         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3411
3412 }
3413
3414 void
3415 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3416 {
3417         Drag::start_grab (event, cursor);
3418
3419         TempoMap& map (_editor->session()->tempo_map());
3420         ostringstream sstr;
3421
3422         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3423         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3424         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3425         show_verbose_cursor_text (sstr.str());
3426         finished (event, false);
3427 }
3428
3429 void
3430 BBTRulerDrag::setup_pointer_frame_offset ()
3431 {
3432         TempoMap& map (_editor->session()->tempo_map());
3433         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3434         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3435         if (divisions > 0) {
3436                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3437         } else {
3438                 /* while it makes some sense for the user to determine the division to 'grab',
3439                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3440                    and the result over steep tempo curves. Use sixteenths.
3441                 */
3442                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3443         }
3444         _pulse = map.pulse_at_beat (_beat);
3445         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3446 }
3447
3448 void
3449 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3450 {
3451         TempoMap& map (_editor->session()->tempo_map());
3452
3453         if (first_move) {
3454                 /* get current state */
3455                 before_state = &map.get_state();
3456                 _editor->begin_reversible_command (_("dilate tempo"));
3457         }
3458
3459         framepos_t const pf = adjusted_current_frame (event, false);
3460
3461         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3462                 /* adjust previous tempo to match pointer frame */
3463                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3464         }
3465         ostringstream sstr;
3466         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3467         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3468         show_verbose_cursor_text (sstr.str());
3469 }
3470
3471 void
3472 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3473 {
3474         if (!movement_occurred) {
3475                 return;
3476         }
3477
3478         TempoMap& map (_editor->session()->tempo_map());
3479
3480         XMLNode &after = map.get_state();
3481         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3482         _editor->commit_reversible_command ();
3483 }
3484
3485 void
3486 BBTRulerDrag::aborted (bool moved)
3487 {
3488         if (moved) {
3489                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3490         }
3491 }
3492
3493
3494 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3495         : Drag (e, &c.track_canvas_item(), false)
3496         , _cursor (c)
3497         , _stop (s)
3498         , _grab_zoom (0.0)
3499 {
3500         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3501 }
3502
3503 /** Do all the things we do when dragging the playhead to make it look as though
3504  *  we have located, without actually doing the locate (because that would cause
3505  *  the diskstream buffers to be refilled, which is too slow).
3506  */
3507 void
3508 CursorDrag::fake_locate (framepos_t t)
3509 {
3510         if (_editor->session () == 0) {
3511                 return;
3512         }
3513
3514         _editor->playhead_cursor->set_position (t);
3515
3516         Session* s = _editor->session ();
3517         if (s->timecode_transmission_suspended ()) {
3518                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3519                 /* This is asynchronous so it will be sent "now"
3520                  */
3521                 s->send_mmc_locate (f);
3522                 /* These are synchronous and will be sent during the next
3523                    process cycle
3524                 */
3525                 s->queue_full_time_code ();
3526                 s->queue_song_position_pointer ();
3527         }
3528
3529         show_verbose_cursor_time (t);
3530         _editor->UpdateAllTransportClocks (t);
3531 }
3532
3533 void
3534 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3535 {
3536         Drag::start_grab (event, c);
3537         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3538
3539         _grab_zoom = _editor->samples_per_pixel;
3540
3541         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3542
3543         _editor->snap_to_with_modifier (where, event);
3544
3545         _editor->_dragging_playhead = true;
3546
3547         Session* s = _editor->session ();
3548
3549         /* grab the track canvas item as well */
3550
3551         _cursor.track_canvas_item().grab();
3552
3553         if (s) {
3554                 if (_was_rolling && _stop) {
3555                         s->request_stop ();
3556                 }
3557
3558                 if (s->is_auditioning()) {
3559                         s->cancel_audition ();
3560                 }
3561
3562
3563                 if (AudioEngine::instance()->connected()) {
3564
3565                         /* do this only if we're the engine is connected
3566                          * because otherwise this request will never be
3567                          * serviced and we'll busy wait forever. likewise,
3568                          * notice if we are disconnected while waiting for the
3569                          * request to be serviced.
3570                          */
3571
3572                         s->request_suspend_timecode_transmission ();
3573                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3574                                 /* twiddle our thumbs */
3575                         }
3576                 }
3577         }
3578
3579         fake_locate (where - snap_delta (event->button.state));
3580 }
3581
3582 void
3583 CursorDrag::motion (GdkEvent* event, bool)
3584 {
3585         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3586         _editor->snap_to_with_modifier (where, event);
3587         if (where != last_pointer_frame()) {
3588                 fake_locate (where - snap_delta (event->button.state));
3589         }
3590 }
3591
3592 void
3593 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3594 {
3595         _editor->_dragging_playhead = false;
3596
3597         _cursor.track_canvas_item().ungrab();
3598
3599         if (!movement_occurred && _stop) {
3600                 return;
3601         }
3602
3603         motion (event, false);
3604
3605         Session* s = _editor->session ();
3606         if (s) {
3607                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3608                 _editor->_pending_locate_request = true;
3609                 s->request_resume_timecode_transmission ();
3610         }
3611 }
3612
3613 void
3614 CursorDrag::aborted (bool)
3615 {
3616         _cursor.track_canvas_item().ungrab();
3617
3618         if (_editor->_dragging_playhead) {
3619                 _editor->session()->request_resume_timecode_transmission ();
3620                 _editor->_dragging_playhead = false;
3621         }
3622
3623         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3624 }
3625
3626 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3627         : RegionDrag (e, i, p, v)
3628 {
3629         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3630 }
3631
3632 void
3633 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3634 {
3635         Drag::start_grab (event, cursor);
3636
3637         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3638         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3639         setup_snap_delta (r->position ());
3640
3641         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3642 }
3643
3644 void
3645 FadeInDrag::setup_pointer_frame_offset ()
3646 {
3647         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3648         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3649         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3650 }
3651
3652 void
3653 FadeInDrag::motion (GdkEvent* event, bool)
3654 {
3655         framecnt_t fade_length;
3656
3657         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3658         _editor->snap_to_with_modifier (pos, event);
3659         pos -= snap_delta (event->button.state);
3660
3661         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3662
3663         if (pos < (region->position() + 64)) {
3664                 fade_length = 64; // this should be a minimum defined somewhere
3665         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3666                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3667         } else {
3668                 fade_length = pos - region->position();
3669         }
3670
3671         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3672
3673                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3674
3675                 if (!tmp) {
3676                         continue;
3677                 }
3678
3679                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3680         }
3681
3682         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3683 }
3684
3685 void
3686 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3687 {
3688         if (!movement_occurred) {
3689                 return;
3690         }
3691
3692         framecnt_t fade_length;
3693         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3694         _editor->snap_to_with_modifier (pos, event);
3695         pos -= snap_delta (event->button.state);
3696
3697         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3698
3699         if (pos < (region->position() + 64)) {
3700                 fade_length = 64; // this should be a minimum defined somewhere
3701         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3702                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3703         } else {
3704                 fade_length = pos - region->position();
3705         }
3706
3707         bool in_command = false;
3708
3709         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3710
3711                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3712
3713                 if (!tmp) {
3714                         continue;
3715                 }
3716
3717                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3718                 XMLNode &before = alist->get_state();
3719
3720                 tmp->audio_region()->set_fade_in_length (fade_length);
3721                 tmp->audio_region()->set_fade_in_active (true);
3722
3723                 if (!in_command) {
3724                         _editor->begin_reversible_command (_("change fade in length"));
3725                         in_command = true;
3726                 }
3727                 XMLNode &after = alist->get_state();
3728                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3729         }
3730
3731         if (in_command) {
3732                 _editor->commit_reversible_command ();
3733         }
3734 }
3735
3736 void
3737 FadeInDrag::aborted (bool)
3738 {
3739         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3740                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3741
3742                 if (!tmp) {
3743                         continue;
3744                 }
3745
3746                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3747         }
3748 }
3749
3750 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3751         : RegionDrag (e, i, p, v)
3752 {
3753         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3754 }
3755
3756 void
3757 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3758 {
3759         Drag::start_grab (event, cursor);
3760
3761         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3762         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3763         setup_snap_delta (r->last_frame ());
3764
3765         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3766 }
3767
3768 void
3769 FadeOutDrag::setup_pointer_frame_offset ()
3770 {
3771         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3772         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3773         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3774 }
3775
3776 void
3777 FadeOutDrag::motion (GdkEvent* event, bool)
3778 {
3779         framecnt_t fade_length;
3780
3781         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3782         _editor->snap_to_with_modifier (pos, event);
3783         pos -= snap_delta (event->button.state);
3784
3785         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3786
3787         if (pos > (region->last_frame() - 64)) {
3788                 fade_length = 64; // this should really be a minimum fade defined somewhere
3789         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3790                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3791         } else {
3792                 fade_length = region->last_frame() - pos;
3793         }
3794
3795         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3796
3797                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3798
3799                 if (!tmp) {
3800                         continue;
3801                 }
3802
3803                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3804         }
3805
3806         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3807 }
3808
3809 void
3810 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3811 {
3812         if (!movement_occurred) {
3813                 return;
3814         }
3815
3816         framecnt_t fade_length;
3817
3818         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3819         _editor->snap_to_with_modifier (pos, event);
3820         pos -= snap_delta (event->button.state);
3821
3822         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3823
3824         if (pos > (region->last_frame() - 64)) {
3825                 fade_length = 64; // this should really be a minimum fade defined somewhere
3826         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3827                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3828         } else {
3829                 fade_length = region->last_frame() - pos;
3830         }
3831
3832         bool in_command = false;
3833
3834         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3835
3836                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3837
3838                 if (!tmp) {
3839                         continue;
3840                 }
3841
3842                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3843                 XMLNode &before = alist->get_state();
3844
3845                 tmp->audio_region()->set_fade_out_length (fade_length);
3846                 tmp->audio_region()->set_fade_out_active (true);
3847
3848                 if (!in_command) {
3849                         _editor->begin_reversible_command (_("change fade out length"));
3850                         in_command = true;
3851                 }
3852                 XMLNode &after = alist->get_state();
3853                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3854         }
3855
3856         if (in_command) {
3857                 _editor->commit_reversible_command ();
3858         }
3859 }
3860
3861 void
3862 FadeOutDrag::aborted (bool)
3863 {
3864         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3865                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3866
3867                 if (!tmp) {
3868                         continue;
3869                 }
3870
3871                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3872         }
3873 }
3874
3875 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3876         : Drag (e, i)
3877         , _selection_changed (false)
3878 {
3879         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3880         Gtk::Window* toplevel = _editor->current_toplevel();
3881         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3882
3883         assert (_marker);
3884
3885         _points.push_back (ArdourCanvas::Duple (0, 0));
3886
3887         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3888 }
3889
3890 MarkerDrag::~MarkerDrag ()
3891 {
3892         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3893                 delete i->location;
3894         }
3895 }
3896
3897 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3898 {
3899         location = new Location (*l);
3900         markers.push_back (m);
3901         move_both = false;
3902 }
3903
3904 void
3905 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3906 {
3907         Drag::start_grab (event, cursor);
3908
3909         bool is_start;
3910
3911         Location *location = _editor->find_location_from_marker (_marker, is_start);
3912         _editor->_dragging_edit_point = true;
3913
3914         update_item (location);
3915
3916         // _drag_line->show();
3917         // _line->raise_to_top();
3918
3919         if (is_start) {
3920                 show_verbose_cursor_time (location->start());
3921         } else {
3922                 show_verbose_cursor_time (location->end());
3923         }
3924         setup_snap_delta (is_start ? location->start() : location->end());
3925
3926         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3927
3928         switch (op) {
3929         case Selection::Toggle:
3930                 /* we toggle on the button release */
3931                 break;
3932         case Selection::Set:
3933                 if (!_editor->selection->selected (_marker)) {
3934                         _editor->selection->set (_marker);
3935                         _selection_changed = true;
3936                 }
3937                 break;
3938         case Selection::Extend:
3939         {
3940                 Locations::LocationList ll;
3941                 list<ArdourMarker*> to_add;
3942                 framepos_t s, e;
3943                 _editor->selection->markers.range (s, e);
3944                 s = min (_marker->position(), s);
3945                 e = max (_marker->position(), e);
3946                 s = min (s, e);
3947                 e = max (s, e);
3948                 if (e < max_framepos) {
3949                         ++e;
3950                 }
3951                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3952                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3953                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
3954                         if (lm) {
3955                                 if (lm->start) {
3956                                         to_add.push_back (lm->start);
3957                                 }
3958                                 if (lm->end) {
3959                                         to_add.push_back (lm->end);
3960                                 }
3961                         }
3962                 }
3963                 if (!to_add.empty()) {
3964                         _editor->selection->add (to_add);
3965                         _selection_changed = true;
3966                 }
3967                 break;
3968         }
3969         case Selection::Add:
3970                 _editor->selection->add (_marker);
3971                 _selection_changed = true;
3972
3973                 break;
3974         }
3975
3976         /* Set up copies for us to manipulate during the drag
3977          */
3978
3979         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
3980
3981                 Location* l = _editor->find_location_from_marker (*i, is_start);
3982
3983                 if (!l) {
3984                         continue;
3985                 }
3986
3987                 if (l->is_mark()) {
3988                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
3989                 } else {
3990                         /* range: check that the other end of the range isn't
3991                            already there.
3992                         */
3993                         CopiedLocationInfo::iterator x;
3994                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
3995                                 if (*(*x).location == *l) {
3996                                         break;
3997                                 }
3998                         }
3999                         if (x == _copied_locations.end()) {
4000                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4001                         } else {
4002                                 (*x).markers.push_back (*i);
4003                                 (*x).move_both = true;
4004                         }
4005                 }
4006
4007         }
4008 }
4009
4010 void
4011 MarkerDrag::setup_pointer_frame_offset ()
4012 {
4013         bool is_start;
4014         Location *location = _editor->find_location_from_marker (_marker, is_start);
4015         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4016 }
4017
4018 void
4019 MarkerDrag::motion (GdkEvent* event, bool)
4020 {
4021         framecnt_t f_delta = 0;
4022         bool is_start;
4023         bool move_both = false;
4024         Location *real_location;
4025         Location *copy_location = 0;
4026         framecnt_t const sd = snap_delta (event->button.state);
4027
4028         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4029         framepos_t next = newframe;
4030
4031         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4032                 move_both = true;
4033         }
4034
4035         CopiedLocationInfo::iterator x;
4036
4037         /* find the marker we're dragging, and compute the delta */
4038
4039         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4040
4041                 copy_location = (*x).location;
4042
4043                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4044
4045                         /* this marker is represented by this
4046                          * CopiedLocationMarkerInfo
4047                          */
4048
4049                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4050                                 /* que pasa ?? */
4051                                 return;
4052                         }
4053
4054                         if (real_location->is_mark()) {
4055                                 f_delta = newframe - copy_location->start();
4056                         } else {
4057
4058
4059                                 switch (_marker->type()) {
4060                                 case ArdourMarker::SessionStart:
4061                                 case ArdourMarker::RangeStart:
4062                                 case ArdourMarker::LoopStart:
4063                                 case ArdourMarker::PunchIn:
4064                                         f_delta = newframe - copy_location->start();
4065                                         break;
4066
4067                                 case ArdourMarker::SessionEnd:
4068                                 case ArdourMarker::RangeEnd:
4069                                 case ArdourMarker::LoopEnd:
4070                                 case ArdourMarker::PunchOut:
4071                                         f_delta = newframe - copy_location->end();
4072                                         break;
4073                                 default:
4074                                         /* what kind of marker is this ? */
4075                                         return;
4076                                 }
4077                         }
4078
4079                         break;
4080                 }
4081         }
4082
4083         if (x == _copied_locations.end()) {
4084                 /* hmm, impossible - we didn't find the dragged marker */
4085                 return;
4086         }
4087
4088         /* now move them all */
4089
4090         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4091
4092                 copy_location = x->location;
4093
4094                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4095                         continue;
4096                 }
4097
4098                 if (real_location->locked()) {
4099                         continue;
4100                 }
4101
4102                 if (copy_location->is_mark()) {
4103
4104                         /* now move it */
4105
4106                         copy_location->set_start (copy_location->start() + f_delta);
4107
4108                 } else {
4109
4110                         framepos_t new_start = copy_location->start() + f_delta;
4111                         framepos_t new_end = copy_location->end() + f_delta;
4112
4113                         if (is_start) { // start-of-range marker
4114
4115                                 if (move_both || (*x).move_both) {
4116                                         copy_location->set_start (new_start);
4117                                         copy_location->set_end (new_end);
4118                                 } else  if (new_start < copy_location->end()) {
4119                                         copy_location->set_start (new_start);
4120                                 } else if (newframe > 0) {
4121                                         //_editor->snap_to (next, RoundUpAlways, true);
4122                                         copy_location->set_end (next);
4123                                         copy_location->set_start (newframe);
4124                                 }
4125
4126                         } else { // end marker
4127
4128                                 if (move_both || (*x).move_both) {
4129                                         copy_location->set_end (new_end);
4130                                         copy_location->set_start (new_start);
4131                                 } else if (new_end > copy_location->start()) {
4132                                         copy_location->set_end (new_end);
4133                                 } else if (newframe > 0) {
4134                                         //_editor->snap_to (next, RoundDownAlways, true);
4135                                         copy_location->set_start (next);
4136                                         copy_location->set_end (newframe);
4137                                 }
4138                         }
4139                 }
4140
4141                 update_item (copy_location);
4142
4143                 /* now lookup the actual GUI items used to display this
4144                  * location and move them to wherever the copy of the location
4145                  * is now. This means that the logic in ARDOUR::Location is
4146                  * still enforced, even though we are not (yet) modifying
4147                  * the real Location itself.
4148                  */
4149
4150                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4151
4152                 if (lm) {
4153                         lm->set_position (copy_location->start(), copy_location->end());
4154                 }
4155
4156         }
4157
4158         assert (!_copied_locations.empty());
4159
4160         show_verbose_cursor_time (newframe);
4161 }
4162
4163 void
4164 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4165 {
4166         if (!movement_occurred) {
4167
4168                 if (was_double_click()) {
4169                         _editor->rename_marker (_marker);
4170                         return;
4171                 }
4172
4173                 /* just a click, do nothing but finish
4174                    off the selection process
4175                 */
4176
4177                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4178                 switch (op) {
4179                 case Selection::Set:
4180                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4181                                 _editor->selection->set (_marker);
4182                                 _selection_changed = true;
4183                         }
4184                         break;
4185
4186                 case Selection::Toggle:
4187                         /* we toggle on the button release, click only */
4188                         _editor->selection->toggle (_marker);
4189                         _selection_changed = true;
4190
4191                         break;
4192
4193                 case Selection::Extend:
4194                 case Selection::Add:
4195                         break;
4196                 }
4197
4198                 if (_selection_changed) {
4199                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4200                         _editor->commit_reversible_selection_op();
4201                 }
4202
4203                 return;
4204         }
4205
4206         _editor->_dragging_edit_point = false;
4207
4208         XMLNode &before = _editor->session()->locations()->get_state();
4209         bool in_command = false;
4210
4211         MarkerSelection::iterator i;
4212         CopiedLocationInfo::iterator x;
4213         bool is_start;
4214
4215         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4216              x != _copied_locations.end() && i != _editor->selection->markers.end();
4217              ++i, ++x) {
4218
4219                 Location * location = _editor->find_location_from_marker (*i, is_start);
4220
4221                 if (location) {
4222
4223                         if (location->locked()) {
4224                                 continue;
4225                         }
4226                         if (!in_command) {
4227                                 _editor->begin_reversible_command ( _("move marker") );
4228                                 in_command = true;
4229                         }
4230                         if (location->is_mark()) {
4231                                 location->set_start (((*x).location)->start());
4232                         } else {
4233                                 location->set (((*x).location)->start(), ((*x).location)->end());
4234                         }
4235                 }
4236         }
4237
4238         if (in_command) {
4239                 XMLNode &after = _editor->session()->locations()->get_state();
4240                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4241                 _editor->commit_reversible_command ();
4242         }
4243 }
4244
4245 void
4246 MarkerDrag::aborted (bool movement_occurred)
4247 {
4248         if (!movement_occurred) {
4249                 return;
4250         }
4251
4252         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4253
4254                 /* move all markers to their original location */
4255
4256
4257                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4258
4259                         bool is_start;
4260                         Location * location = _editor->find_location_from_marker (*m, is_start);
4261
4262                         if (location) {
4263                                 (*m)->set_position (is_start ? location->start() : location->end());
4264                         }
4265                 }
4266         }
4267 }
4268
4269 void
4270 MarkerDrag::update_item (Location*)
4271 {
4272         /* noop */
4273 }
4274
4275 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4276         : Drag (e, i)
4277         , _fixed_grab_x (0.0)
4278         , _fixed_grab_y (0.0)
4279         , _cumulative_x_drag (0.0)
4280         , _cumulative_y_drag (0.0)
4281         , _pushing (false)
4282         , _final_index (0)
4283 {
4284         if (_zero_gain_fraction < 0.0) {
4285                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4286         }
4287
4288         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4289
4290         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4291         assert (_point);
4292 }
4293
4294
4295 void
4296 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4297 {
4298         Drag::start_grab (event, _editor->cursors()->fader);
4299
4300         // start the grab at the center of the control point so
4301         // the point doesn't 'jump' to the mouse after the first drag
4302         _fixed_grab_x = _point->get_x();
4303         _fixed_grab_y = _point->get_y();
4304
4305         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4306         setup_snap_delta (pos);
4307
4308         float const fraction = 1 - (_point->get_y() / _point->line().height());
4309         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4310
4311         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4312
4313         if (!_point->can_slide ()) {
4314                 _x_constrained = true;
4315         }
4316 }
4317
4318 void
4319 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4320 {
4321         double dx = _drags->current_pointer_x() - last_pointer_x();
4322         double dy = current_pointer_y() - last_pointer_y();
4323         bool need_snap = true;
4324
4325         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4326                 dx *= 0.1;
4327                 dy *= 0.1;
4328                 need_snap = false;
4329         }
4330
4331         /* coordinate in pixels relative to the start of the region (for region-based automation)
4332            or track (for track-based automation) */
4333         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4334         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4335
4336         // calculate zero crossing point. back off by .01 to stay on the
4337         // positive side of zero
4338         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4339
4340         if (_x_constrained) {
4341                 cx = _fixed_grab_x;
4342         }
4343         if (_y_constrained) {
4344                 cy = _fixed_grab_y;
4345         }
4346
4347         _cumulative_x_drag = cx - _fixed_grab_x;
4348         _cumulative_y_drag = cy - _fixed_grab_y;
4349
4350         cx = max (0.0, cx);
4351         cy = max (0.0, cy);
4352         cy = min ((double) _point->line().height(), cy);
4353
4354         // make sure we hit zero when passing through
4355         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4356                 cy = zero_gain_y;
4357         }
4358
4359         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4360
4361         if (!_x_constrained && need_snap) {
4362                 _editor->snap_to_with_modifier (cx_frames, event);
4363         }
4364
4365         cx_frames -= snap_delta (event->button.state);
4366         cx_frames = min (cx_frames, _point->line().maximum_time());
4367
4368         float const fraction = 1.0 - (cy / _point->line().height());
4369
4370         if (first_motion) {
4371                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4372                 _editor->begin_reversible_command (_("automation event move"));
4373                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4374         }
4375         pair<double, float> result;
4376         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4377
4378         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4379 }
4380
4381 void
4382 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4383 {
4384         if (!movement_occurred) {
4385
4386                 /* just a click */
4387                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4388                         _editor->reset_point_selection ();
4389                 }
4390
4391         } else {
4392                 _point->line().end_drag (_pushing, _final_index);
4393                 _editor->commit_reversible_command ();
4394         }
4395 }
4396
4397 void
4398 ControlPointDrag::aborted (bool)
4399 {
4400         _point->line().reset ();
4401 }
4402
4403 bool
4404 ControlPointDrag::active (Editing::MouseMode m)
4405 {
4406         if (m == Editing::MouseDraw) {
4407                 /* always active in mouse draw */
4408                 return true;
4409         }
4410
4411         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4412         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4413 }
4414
4415 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4416         : Drag (e, i)
4417         , _line (0)
4418         , _fixed_grab_x (0.0)
4419         , _fixed_grab_y (0.0)
4420         , _cumulative_y_drag (0)
4421         , _before (0)
4422         , _after (0)
4423 {
4424         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4425 }
4426
4427 void
4428 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4429 {
4430         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4431         assert (_line);
4432
4433         _item = &_line->grab_item ();
4434
4435         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4436            origin, and ditto for y.
4437         */
4438
4439         double mx = event->button.x;
4440         double my = event->button.y;
4441
4442         _line->grab_item().canvas_to_item (mx, my);
4443
4444         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4445
4446         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4447                 /* no adjacent points */
4448                 return;
4449         }
4450
4451         Drag::start_grab (event, _editor->cursors()->fader);
4452
4453         /* store grab start in item frame */
4454         double const bx = _line->nth (_before)->get_x();
4455         double const ax = _line->nth (_after)->get_x();
4456         double const click_ratio = (ax - mx) / (ax - bx);
4457
4458         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4459
4460         _fixed_grab_x = mx;
4461         _fixed_grab_y = cy;
4462
4463         double fraction = 1.0 - (cy / _line->height());
4464
4465         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4466 }
4467
4468 void
4469 LineDrag::motion (GdkEvent* event, bool first_move)
4470 {
4471         double dy = current_pointer_y() - last_pointer_y();
4472
4473         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4474                 dy *= 0.1;
4475         }
4476
4477         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4478
4479         _cumulative_y_drag = cy - _fixed_grab_y;
4480
4481         cy = max (0.0, cy);
4482         cy = min ((double) _line->height(), cy);
4483
4484         double const fraction = 1.0 - (cy / _line->height());
4485         uint32_t ignored;
4486
4487         if (first_move) {
4488                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4489
4490                 _editor->begin_reversible_command (_("automation range move"));
4491                 _line->start_drag_line (_before, _after, initial_fraction);
4492         }
4493
4494         /* we are ignoring x position for this drag, so we can just pass in anything */
4495         pair<double, float> result;
4496
4497         result = _line->drag_motion (0, fraction, true, false, ignored);
4498         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4499 }
4500
4501 void
4502 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4503 {
4504         if (movement_occurred) {
4505                 motion (event, false);
4506                 _line->end_drag (false, 0);
4507                 _editor->commit_reversible_command ();
4508         } else {
4509                 /* add a new control point on the line */
4510
4511                 AutomationTimeAxisView* atv;
4512
4513                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4514                         framepos_t where = grab_frame ();
4515
4516                         double cx = 0;
4517                         double cy = _fixed_grab_y;
4518
4519                         _line->grab_item().item_to_canvas (cx, cy);
4520
4521                         atv->add_automation_event (event, where, cy, false);
4522                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4523                         AudioRegionView* arv;
4524
4525                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4526                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4527                         }
4528                 }
4529         }
4530 }
4531
4532 void
4533 LineDrag::aborted (bool)
4534 {
4535         _line->reset ();
4536 }
4537
4538 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4539         : Drag (e, i),
4540           _line (0),
4541           _arv (0),
4542           _region_view_grab_x (0.0),
4543           _cumulative_x_drag (0),
4544           _before (0.0),
4545           _max_x (0)
4546 {
4547         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4548 }
4549
4550 void
4551 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4552 {
4553         Drag::start_grab (event);
4554
4555         _line = reinterpret_cast<Line*> (_item);
4556         assert (_line);
4557
4558         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4559
4560         double cx = event->button.x;
4561         double cy = event->button.y;
4562
4563         _item->parent()->canvas_to_item (cx, cy);
4564
4565         /* store grab start in parent frame */
4566         _region_view_grab_x = cx;
4567
4568         _before = *(float*) _item->get_data ("position");
4569
4570         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4571
4572         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4573 }
4574
4575 void
4576 FeatureLineDrag::motion (GdkEvent*, bool)
4577 {
4578         double dx = _drags->current_pointer_x() - last_pointer_x();
4579
4580         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4581
4582         _cumulative_x_drag += dx;
4583
4584         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4585
4586         if (cx > _max_x){
4587                 cx = _max_x;
4588         }
4589         else if(cx < 0){
4590                 cx = 0;
4591         }
4592
4593         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4594         assert (bbox);
4595         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4596
4597         float *pos = new float;
4598         *pos = cx;
4599
4600         _line->set_data ("position", pos);
4601
4602         _before = cx;
4603 }
4604
4605 void
4606 FeatureLineDrag::finished (GdkEvent*, bool)
4607 {
4608         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4609         _arv->update_transient(_before, _before);
4610 }
4611
4612 void
4613 FeatureLineDrag::aborted (bool)
4614 {
4615         //_line->reset ();
4616 }
4617
4618 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4619         : Drag (e, i)
4620         , _vertical_only (false)
4621 {
4622         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4623 }
4624
4625 void
4626 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4627 {
4628         Drag::start_grab (event);
4629         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4630 }
4631
4632 void
4633 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4634 {
4635         framepos_t start;
4636         framepos_t end;
4637         double y1;
4638         double y2;
4639
4640         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4641
4642         framepos_t grab = grab_frame ();
4643         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4644                 _editor->snap_to_with_modifier (grab, event);
4645         } else {
4646                 grab = raw_grab_frame ();
4647         }
4648
4649         /* base start and end on initial click position */
4650
4651         if (pf < grab) {
4652                 start = pf;
4653                 end = grab;
4654         } else {
4655                 end = pf;
4656                 start = grab;
4657         }
4658
4659         if (current_pointer_y() < grab_y()) {
4660                 y1 = current_pointer_y();
4661                 y2 = grab_y();
4662         } else {
4663                 y2 = current_pointer_y();
4664                 y1 = grab_y();
4665         }
4666
4667         if (start != end || y1 != y2) {
4668
4669                 double x1 = _editor->sample_to_pixel (start);
4670                 double x2 = _editor->sample_to_pixel (end);
4671                 const double min_dimension = 2.0;
4672
4673                 if (_vertical_only) {
4674                         /* fixed 10 pixel width */
4675                         x2 = x1 + 10;
4676                 } else {
4677                         if (x2 < x1) {
4678                                 x2 = min (x1 - min_dimension, x2);
4679                         } else {
4680                                 x2 = max (x1 + min_dimension, x2);
4681                         }
4682                 }
4683
4684                 if (y2 < y1) {
4685                         y2 = min (y1 - min_dimension, y2);
4686                 } else {
4687                         y2 = max (y1 + min_dimension, y2);
4688                 }
4689
4690                 /* translate rect into item space and set */
4691
4692                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4693
4694                 /* this drag is a _trackview_only == true drag, so the y1 and
4695                  * y2 (computed using current_pointer_y() and grab_y()) will be
4696                  * relative to the top of the trackview group). The
4697                  * rubberband rect has the same parent/scroll offset as the
4698                  * the trackview group, so we can use the "r" rect directly
4699                  * to set the shape of the rubberband.
4700                  */
4701
4702                 _editor->rubberband_rect->set (r);
4703                 _editor->rubberband_rect->show();
4704                 _editor->rubberband_rect->raise_to_top();
4705
4706                 show_verbose_cursor_time (pf);
4707
4708                 do_select_things (event, true);
4709         }
4710 }
4711
4712 void
4713 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4714 {
4715         framepos_t x1;
4716         framepos_t x2;
4717         framepos_t grab = grab_frame ();
4718         framepos_t lpf = last_pointer_frame ();
4719
4720         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4721                 grab = raw_grab_frame ();
4722                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4723         }
4724
4725         if (grab < lpf) {
4726                 x1 = grab;
4727                 x2 = lpf;
4728         } else {
4729                 x2 = grab;
4730                 x1 = lpf;
4731         }
4732
4733         double y1;
4734         double y2;
4735
4736         if (current_pointer_y() < grab_y()) {
4737                 y1 = current_pointer_y();
4738                 y2 = grab_y();
4739         } else {
4740                 y2 = current_pointer_y();
4741                 y1 = grab_y();
4742         }
4743
4744         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4745 }
4746
4747 void
4748 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4749 {
4750         if (movement_occurred) {
4751
4752                 motion (event, false);
4753                 do_select_things (event, false);
4754
4755         } else {
4756
4757                 /* just a click */
4758
4759                 bool do_deselect = true;
4760                 MidiTimeAxisView* mtv;
4761
4762                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4763                         /* MIDI track */
4764                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4765                                 /* nothing selected */
4766                                 add_midi_region (mtv, true);
4767                                 do_deselect = false;
4768                         }
4769                 }
4770
4771                 /* do not deselect if Primary or Tertiary (toggle-select or
4772                  * extend-select are pressed.
4773                  */
4774
4775                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4776                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4777                     do_deselect) {
4778                         deselect_things ();
4779                 }
4780
4781         }
4782
4783         _editor->rubberband_rect->hide();
4784 }
4785
4786 void
4787 RubberbandSelectDrag::aborted (bool)
4788 {
4789         _editor->rubberband_rect->hide ();
4790 }
4791
4792 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4793         : RegionDrag (e, i, p, v)
4794 {
4795         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4796 }
4797
4798 void
4799 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4800 {
4801         Drag::start_grab (event, cursor);
4802
4803         _editor->get_selection().add (_primary);
4804
4805         framepos_t where = _primary->region()->position();
4806         setup_snap_delta (where);
4807
4808         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4809 }
4810
4811 void
4812 TimeFXDrag::motion (GdkEvent* event, bool)
4813 {
4814         RegionView* rv = _primary;
4815         StreamView* cv = rv->get_time_axis_view().view ();
4816
4817         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4818         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4819         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4820         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4821         _editor->snap_to_with_modifier (pf, event);
4822         pf -= snap_delta (event->button.state);
4823
4824         if (pf > rv->region()->position()) {
4825                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4826         }
4827
4828         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4829 }
4830
4831 void
4832 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4833 {
4834         /* this may have been a single click, no drag. We still want the dialog
4835            to show up in that case, so that the user can manually edit the
4836            parameters for the timestretch.
4837         */
4838
4839         float fraction = 1.0;
4840
4841         if (movement_occurred) {
4842
4843                 motion (event, false);
4844
4845                 _primary->get_time_axis_view().hide_timestretch ();
4846
4847                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4848
4849                 if (adjusted_frame_pos < _primary->region()->position()) {
4850                         /* backwards drag of the left edge - not usable */
4851                         return;
4852                 }
4853
4854                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4855
4856                 fraction = (double) newlen / (double) _primary->region()->length();
4857
4858 #ifndef USE_RUBBERBAND
4859                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4860                 if (_primary->region()->data_type() == DataType::AUDIO) {
4861                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4862                 }
4863 #endif
4864         }
4865
4866         if (!_editor->get_selection().regions.empty()) {
4867                 /* primary will already be included in the selection, and edit
4868                    group shared editing will propagate selection across
4869                    equivalent regions, so just use the current region
4870                    selection.
4871                 */
4872
4873                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4874                         error << _("An error occurred while executing time stretch operation") << endmsg;
4875                 }
4876         }
4877 }
4878
4879 void
4880 TimeFXDrag::aborted (bool)
4881 {
4882         _primary->get_time_axis_view().hide_timestretch ();
4883 }
4884
4885 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4886         : Drag (e, i)
4887 {
4888         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4889 }
4890
4891 void
4892 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4893 {
4894         Drag::start_grab (event);
4895 }
4896
4897 void
4898 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4899 {
4900         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4901 }
4902
4903 void
4904 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4905 {
4906         if (movement_occurred && _editor->session()) {
4907                 /* make sure we stop */
4908                 _editor->session()->request_transport_speed (0.0);
4909         }
4910 }
4911
4912 void
4913 ScrubDrag::aborted (bool)
4914 {
4915         /* XXX: TODO */
4916 }
4917
4918 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4919         : Drag (e, i)
4920         , _operation (o)
4921         , _add (false)
4922         , _time_selection_at_start (!_editor->get_selection().time.empty())
4923 {
4924         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4925
4926         if (_time_selection_at_start) {
4927                 start_at_start = _editor->get_selection().time.start();
4928                 end_at_start = _editor->get_selection().time.end_frame();
4929         }
4930 }
4931
4932 void
4933 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4934 {
4935         if (_editor->session() == 0) {
4936                 return;
4937         }
4938
4939         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4940
4941         switch (_operation) {
4942         case CreateSelection:
4943                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4944                         _add = true;
4945                 } else {
4946                         _add = false;
4947                 }
4948                 cursor = _editor->cursors()->selector;
4949                 Drag::start_grab (event, cursor);
4950                 break;
4951
4952         case SelectionStartTrim:
4953                 if (_editor->clicked_axisview) {
4954                         _editor->clicked_axisview->order_selection_trims (_item, true);
4955                 }
4956                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
4957                 break;
4958
4959         case SelectionEndTrim:
4960                 if (_editor->clicked_axisview) {
4961                         _editor->clicked_axisview->order_selection_trims (_item, false);
4962                 }
4963                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
4964                 break;
4965
4966         case SelectionMove:
4967                 Drag::start_grab (event, cursor);
4968                 break;
4969
4970         case SelectionExtend:
4971                 Drag::start_grab (event, cursor);
4972                 break;
4973         }
4974
4975         if (_operation == SelectionMove) {
4976                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
4977         } else {
4978                 show_verbose_cursor_time (adjusted_current_frame (event));
4979         }
4980 }
4981
4982 void
4983 SelectionDrag::setup_pointer_frame_offset ()
4984 {
4985         switch (_operation) {
4986         case CreateSelection:
4987                 _pointer_frame_offset = 0;
4988                 break;
4989
4990         case SelectionStartTrim:
4991         case SelectionMove:
4992                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
4993                 break;
4994
4995         case SelectionEndTrim:
4996                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
4997                 break;
4998
4999         case SelectionExtend:
5000                 break;
5001         }
5002 }
5003
5004 void
5005 SelectionDrag::motion (GdkEvent* event, bool first_move)
5006 {
5007         framepos_t start = 0;
5008         framepos_t end = 0;
5009         framecnt_t length = 0;
5010         framecnt_t distance = 0;
5011
5012         framepos_t const pending_position = adjusted_current_frame (event);
5013
5014         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5015                 return;
5016         }
5017
5018         switch (_operation) {
5019         case CreateSelection:
5020         {
5021                 framepos_t grab = grab_frame ();
5022
5023                 if (first_move) {
5024                         grab = adjusted_current_frame (event, false);
5025                         if (grab < pending_position) {
5026                                 _editor->snap_to (grab, RoundDownMaybe);
5027                         }  else {
5028                                 _editor->snap_to (grab, RoundUpMaybe);
5029                         }
5030                 }
5031
5032                 if (pending_position < grab) {
5033                         start = pending_position;
5034                         end = grab;
5035                 } else {
5036                         end = pending_position;
5037                         start = grab;
5038                 }
5039
5040                 /* first drag: Either add to the selection
5041                    or create a new selection
5042                 */
5043
5044                 if (first_move) {
5045
5046                         if (_add) {
5047
5048                                 /* adding to the selection */
5049                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5050                                 _editor->clicked_selection = _editor->selection->add (start, end);
5051                                 _add = false;
5052
5053                         } else {
5054
5055                                 /* new selection */
5056
5057                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5058                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5059                                 }
5060
5061                                 _editor->clicked_selection = _editor->selection->set (start, end);
5062                         }
5063                 }
5064
5065                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5066                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5067                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5068                 if (atest) {
5069                         _editor->selection->add (atest);
5070                         break;
5071                 }
5072
5073                 /* select all tracks within the rectangle that we've marked out so far */
5074                 TrackViewList new_selection;
5075                 TrackViewList& all_tracks (_editor->track_views);
5076
5077                 ArdourCanvas::Coord const top = grab_y();
5078                 ArdourCanvas::Coord const bottom = current_pointer_y();
5079
5080                 if (top >= 0 && bottom >= 0) {
5081
5082                         //first, find the tracks that are covered in the y range selection
5083                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5084                                 if ((*i)->covered_by_y_range (top, bottom)) {
5085                                         new_selection.push_back (*i);
5086                                 }
5087                         }
5088
5089                         //now find any tracks that are GROUPED with the tracks we selected
5090                         TrackViewList grouped_add = new_selection;
5091                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5092                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5093                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5094                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5095                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5096                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5097                                                         grouped_add.push_back (*j);
5098                                         }
5099                                 }
5100                         }
5101
5102                         //now compare our list with the current selection, and add or remove as necessary
5103                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5104                         TrackViewList tracks_to_add;
5105                         TrackViewList tracks_to_remove;
5106                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5107                                 if ( !_editor->selection->tracks.contains ( *i ) )
5108                                         tracks_to_add.push_back ( *i );
5109                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5110                                 if ( !grouped_add.contains ( *i ) )
5111                                         tracks_to_remove.push_back ( *i );
5112                         _editor->selection->add(tracks_to_add);
5113                         _editor->selection->remove(tracks_to_remove);
5114
5115                 }
5116         }
5117         break;
5118
5119         case SelectionStartTrim:
5120
5121                 end = _editor->selection->time[_editor->clicked_selection].end;
5122
5123                 if (pending_position > end) {
5124                         start = end;
5125                 } else {
5126                         start = pending_position;
5127                 }
5128                 break;
5129
5130         case SelectionEndTrim:
5131
5132                 start = _editor->selection->time[_editor->clicked_selection].start;
5133
5134                 if (pending_position < start) {
5135                         end = start;
5136                 } else {
5137                         end = pending_position;
5138                 }
5139
5140                 break;
5141
5142         case SelectionMove:
5143
5144                 start = _editor->selection->time[_editor->clicked_selection].start;
5145                 end = _editor->selection->time[_editor->clicked_selection].end;
5146
5147                 length = end - start;
5148                 distance = pending_position - start;
5149                 start = pending_position;
5150                 _editor->snap_to (start);
5151
5152                 end = start + length;
5153
5154                 break;
5155
5156         case SelectionExtend:
5157                 break;
5158         }
5159
5160         if (start != end) {
5161                 switch (_operation) {
5162                 case SelectionMove:
5163                         if (_time_selection_at_start) {
5164                                 _editor->selection->move_time (distance);
5165                         }
5166                         break;
5167                 default:
5168                         _editor->selection->replace (_editor->clicked_selection, start, end);
5169                 }
5170         }
5171
5172         if (_operation == SelectionMove) {
5173                 show_verbose_cursor_time(start);
5174         } else {
5175                 show_verbose_cursor_time(pending_position);
5176         }
5177 }
5178
5179 void
5180 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5181 {
5182         Session* s = _editor->session();
5183
5184         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5185         if (movement_occurred) {
5186                 motion (event, false);
5187                 /* XXX this is not object-oriented programming at all. ick */
5188                 if (_editor->selection->time.consolidate()) {
5189                         _editor->selection->TimeChanged ();
5190                 }
5191
5192                 /* XXX what if its a music time selection? */
5193                 if (s) {
5194                         if (s->get_play_range() && s->transport_rolling()) {
5195                                 s->request_play_range (&_editor->selection->time, true);
5196                         } else if (!s->config.get_external_sync()) {
5197                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5198                                         if (_operation == SelectionEndTrim)
5199                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5200                                         else
5201                                                 s->request_locate (_editor->get_selection().time.start());
5202                                 }
5203                         }
5204
5205                         if (_editor->get_selection().time.length() != 0) {
5206                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5207                         } else {
5208                                 s->clear_range_selection ();
5209                         }
5210                 }
5211
5212         } else {
5213                 /* just a click, no pointer movement.
5214                  */
5215
5216                 if (_operation == SelectionExtend) {
5217                         if (_time_selection_at_start) {
5218                                 framepos_t pos = adjusted_current_frame (event, false);
5219                                 framepos_t start = min (pos, start_at_start);
5220                                 framepos_t end = max (pos, end_at_start);
5221                                 _editor->selection->set (start, end);
5222                         }
5223                 } else {
5224                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5225                                 if (_editor->clicked_selection) {
5226                                         _editor->selection->remove (_editor->clicked_selection);
5227                                 }
5228                         } else {
5229                                 if (!_editor->clicked_selection) {
5230                                         _editor->selection->clear_time();
5231                                 }
5232                         }
5233                 }
5234
5235                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5236                         _editor->selection->set (_editor->clicked_axisview);
5237                 }
5238
5239                 if (s && s->get_play_range () && s->transport_rolling()) {
5240                         s->request_stop (false, false);
5241                 }
5242
5243         }
5244
5245         _editor->stop_canvas_autoscroll ();
5246         _editor->clicked_selection = 0;
5247         _editor->commit_reversible_selection_op ();
5248 }
5249
5250 void
5251 SelectionDrag::aborted (bool)
5252 {
5253         /* XXX: TODO */
5254 }
5255
5256 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5257         : Drag (e, i, false),
5258           _operation (o),
5259           _copy (false)
5260 {
5261         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5262
5263         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5264                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5265                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5266         _drag_rect->hide ();
5267
5268         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5269         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5270 }
5271
5272 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5273 {
5274         /* normal canvas items will be cleaned up when their parent group is deleted. But
5275            this item is created as the child of a long-lived parent group, and so we
5276            need to explicitly delete it.
5277         */
5278         delete _drag_rect;
5279 }
5280
5281 void
5282 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5283 {
5284         if (_editor->session() == 0) {
5285                 return;
5286         }
5287
5288         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5289
5290         if (!_editor->temp_location) {
5291                 _editor->temp_location = new Location (*_editor->session());
5292         }
5293
5294         switch (_operation) {
5295         case CreateSkipMarker:
5296         case CreateRangeMarker:
5297         case CreateTransportMarker:
5298         case CreateCDMarker:
5299
5300                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5301                         _copy = true;
5302                 } else {
5303                         _copy = false;
5304                 }
5305                 cursor = _editor->cursors()->selector;
5306                 break;
5307         }
5308
5309         Drag::start_grab (event, cursor);
5310
5311         show_verbose_cursor_time (adjusted_current_frame (event));
5312 }
5313
5314 void
5315 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5316 {
5317         framepos_t start = 0;
5318         framepos_t end = 0;
5319         ArdourCanvas::Rectangle *crect;
5320
5321         switch (_operation) {
5322         case CreateSkipMarker:
5323                 crect = _editor->range_bar_drag_rect;
5324                 break;
5325         case CreateRangeMarker:
5326                 crect = _editor->range_bar_drag_rect;
5327                 break;
5328         case CreateTransportMarker:
5329                 crect = _editor->transport_bar_drag_rect;
5330                 break;
5331         case CreateCDMarker:
5332                 crect = _editor->cd_marker_bar_drag_rect;
5333                 break;
5334         default:
5335                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5336                 return;
5337                 break;
5338         }
5339
5340         framepos_t const pf = adjusted_current_frame (event);
5341
5342         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5343                 framepos_t grab = grab_frame ();
5344                 _editor->snap_to (grab);
5345
5346                 if (pf < grab_frame()) {
5347                         start = pf;
5348                         end = grab;
5349                 } else {
5350                         end = pf;
5351                         start = grab;
5352                 }
5353
5354                 /* first drag: Either add to the selection
5355                    or create a new selection.
5356                 */
5357
5358                 if (first_move) {
5359
5360                         _editor->temp_location->set (start, end);
5361
5362                         crect->show ();
5363
5364                         update_item (_editor->temp_location);
5365                         _drag_rect->show();
5366                         //_drag_rect->raise_to_top();
5367
5368                 }
5369         }
5370
5371         if (start != end) {
5372                 _editor->temp_location->set (start, end);
5373
5374                 double x1 = _editor->sample_to_pixel (start);
5375                 double x2 = _editor->sample_to_pixel (end);
5376                 crect->set_x0 (x1);
5377                 crect->set_x1 (x2);
5378
5379                 update_item (_editor->temp_location);
5380         }
5381
5382         show_verbose_cursor_time (pf);
5383
5384 }
5385
5386 void
5387 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5388 {
5389         Location * newloc = 0;
5390         string rangename;
5391         int flags;
5392
5393         if (movement_occurred) {
5394                 motion (event, false);
5395                 _drag_rect->hide();
5396
5397                 switch (_operation) {
5398                 case CreateSkipMarker:
5399                 case CreateRangeMarker:
5400                 case CreateCDMarker:
5401                     {
5402                         XMLNode &before = _editor->session()->locations()->get_state();
5403                         if (_operation == CreateSkipMarker) {
5404                                 _editor->begin_reversible_command (_("new skip marker"));
5405                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5406                                 flags = Location::IsRangeMarker | Location::IsSkip;
5407                                 _editor->range_bar_drag_rect->hide();
5408                         } else if (_operation == CreateCDMarker) {
5409                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5410                                 _editor->begin_reversible_command (_("new CD marker"));
5411                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5412                                 _editor->cd_marker_bar_drag_rect->hide();
5413                         } else {
5414                                 _editor->begin_reversible_command (_("new skip marker"));
5415                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5416                                 flags = Location::IsRangeMarker;
5417                                 _editor->range_bar_drag_rect->hide();
5418                         }
5419                         newloc = new Location (
5420                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5421                                 );
5422
5423                         _editor->session()->locations()->add (newloc, true);
5424                         XMLNode &after = _editor->session()->locations()->get_state();
5425                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5426                         _editor->commit_reversible_command ();
5427                         break;
5428                     }
5429
5430                 case CreateTransportMarker:
5431                         // popup menu to pick loop or punch
5432                         _editor->new_transport_marker_context_menu (&event->button, _item);
5433                         break;
5434                 }
5435
5436         } else {
5437
5438                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5439
5440                 if (_operation == CreateTransportMarker) {
5441
5442                         /* didn't drag, so just locate */
5443
5444                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5445
5446                 } else if (_operation == CreateCDMarker) {
5447
5448                         /* didn't drag, but mark is already created so do
5449                          * nothing */
5450
5451                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5452
5453                         framepos_t start;
5454                         framepos_t end;
5455
5456                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5457
5458                         if (end == max_framepos) {
5459                                 end = _editor->session()->current_end_frame ();
5460                         }
5461
5462                         if (start == max_framepos) {
5463                                 start = _editor->session()->current_start_frame ();
5464                         }
5465
5466                         switch (_editor->mouse_mode) {
5467                         case MouseObject:
5468                                 /* find the two markers on either side and then make the selection from it */
5469                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5470                                 break;
5471
5472                         case MouseRange:
5473                                 /* find the two markers on either side of the click and make the range out of it */
5474                                 _editor->selection->set (start, end);
5475                                 break;
5476
5477                         default:
5478                                 break;
5479                         }
5480                 }
5481         }
5482
5483         _editor->stop_canvas_autoscroll ();
5484 }
5485
5486 void
5487 RangeMarkerBarDrag::aborted (bool movement_occurred)
5488 {
5489         if (movement_occurred) {
5490                 _drag_rect->hide ();
5491         }
5492 }
5493
5494 void
5495 RangeMarkerBarDrag::update_item (Location* location)
5496 {
5497         double const x1 = _editor->sample_to_pixel (location->start());
5498         double const x2 = _editor->sample_to_pixel (location->end());
5499
5500         _drag_rect->set_x0 (x1);
5501         _drag_rect->set_x1 (x2);
5502 }
5503
5504 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5505         : Drag (e, i)
5506         , _cumulative_dx (0)
5507         , _cumulative_dy (0)
5508         , _was_selected (false)
5509 {
5510         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5511
5512         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5513         assert (_primary);
5514         _region = &_primary->region_view ();
5515         _note_height = _region->midi_stream_view()->note_height ();
5516 }
5517
5518 void
5519 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5520 {
5521         Drag::start_grab (event);
5522         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5523
5524         if (!(_was_selected = _primary->selected())) {
5525
5526                 /* tertiary-click means extend selection - we'll do that on button release,
5527                    so don't add it here, because otherwise we make it hard to figure
5528                    out the "extend-to" range.
5529                 */
5530
5531                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5532
5533                 if (!extend) {
5534                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5535
5536                         if (add) {
5537                                 _region->note_selected (_primary, true);
5538                         } else {
5539                                 _editor->get_selection().clear_points();
5540                                 _region->unique_select (_primary);
5541                         }
5542                 }
5543         }
5544 }
5545
5546 /** @return Current total drag x change in frames */
5547 frameoffset_t
5548 NoteDrag::total_dx (const guint state) const
5549 {
5550         /* dx in frames */
5551         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5552
5553         /* primary note time */
5554         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5555
5556         /* new time of the primary note in session frames */
5557         frameoffset_t st = n + dx + snap_delta (state);
5558
5559         framepos_t const rp = _region->region()->position ();
5560
5561         /* prevent the note being dragged earlier than the region's position */
5562         st = max (st, rp);
5563
5564         /* possibly snap and return corresponding delta */
5565
5566         bool snap = true;
5567
5568         if (ArdourKeyboard::indicates_snap (state)) {
5569                 if (_editor->snap_mode () != SnapOff) {
5570                         snap = false;
5571                 }
5572         } else {
5573                 if (_editor->snap_mode () == SnapOff) {
5574                         snap = false;
5575                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5576                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5577                                 snap = true;
5578                         }
5579                 }
5580         }
5581
5582         frameoffset_t ret;
5583         if (snap) {
5584                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5585                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5586         } else {
5587                 ret = st - n - snap_delta (state);
5588         }
5589         return ret;
5590 }
5591
5592 /** @return Current total drag y change in note number */
5593 int8_t
5594 NoteDrag::total_dy () const
5595 {
5596         MidiStreamView* msv = _region->midi_stream_view ();
5597         double const y = _region->midi_view()->y_position ();
5598         /* new current note */
5599         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5600         /* clamp */
5601         n = max (msv->lowest_note(), n);
5602         n = min (msv->highest_note(), n);
5603         /* and work out delta */
5604         return n - msv->y_to_note (grab_y() - y);
5605 }
5606
5607 void
5608 NoteDrag::motion (GdkEvent * event, bool)
5609 {
5610         /* Total change in x and y since the start of the drag */
5611         frameoffset_t const dx = total_dx (event->button.state);
5612         int8_t const dy = total_dy ();
5613
5614         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5615         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5616         double const tdy = -dy * _note_height - _cumulative_dy;
5617
5618         if (tdx || tdy) {
5619                 _cumulative_dx += tdx;
5620                 _cumulative_dy += tdy;
5621
5622                 int8_t note_delta = total_dy();
5623
5624                 _region->move_selection (tdx, tdy, note_delta);
5625
5626                 /* the new note value may be the same as the old one, but we
5627                  * don't know what that means because the selection may have
5628                  * involved more than one note and we might be doing something
5629                  * odd with them. so show the note value anyway, always.
5630                  */
5631
5632                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5633
5634                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5635         }
5636 }
5637
5638 void
5639 NoteDrag::finished (GdkEvent* ev, bool moved)
5640 {
5641         if (!moved) {
5642                 /* no motion - select note */
5643
5644                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5645                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5646
5647                         bool changed = false;
5648
5649                         if (_was_selected) {
5650                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5651                                 if (add) {
5652                                         _region->note_deselected (_primary);
5653                                         changed = true;
5654                                 } else {
5655                                         _editor->get_selection().clear_points();
5656                                         _region->unique_select (_primary);
5657                                         changed = true;
5658                                 }
5659                         } else {
5660                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5661                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5662
5663                                 if (!extend && !add && _region->selection_size() > 1) {
5664                                         _editor->get_selection().clear_points();
5665                                         _region->unique_select (_primary);
5666                                         changed = true;
5667                                 } else if (extend) {
5668                                         _region->note_selected (_primary, true, true);
5669                                         changed = true;
5670                                 } else {
5671                                         /* it was added during button press */
5672                                         changed = true;
5673
5674                                 }
5675                         }
5676
5677                         if (changed) {
5678                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5679                                 _editor->commit_reversible_selection_op();
5680                         }
5681                 }
5682         } else {
5683                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5684         }
5685 }
5686
5687 void
5688 NoteDrag::aborted (bool)
5689 {
5690         /* XXX: TODO */
5691 }
5692
5693 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5694 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5695         : Drag (editor, atv->base_item ())
5696         , _ranges (r)
5697         , _y_origin (atv->y_position())
5698         , _nothing_to_drag (false)
5699 {
5700         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5701         setup (atv->lines ());
5702 }
5703
5704 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5705 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5706         : Drag (editor, rv->get_canvas_group ())
5707         , _ranges (r)
5708         , _y_origin (rv->get_time_axis_view().y_position())
5709         , _nothing_to_drag (false)
5710         , _integral (false)
5711 {
5712         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5713
5714         list<boost::shared_ptr<AutomationLine> > lines;
5715
5716         AudioRegionView*      audio_view;
5717         AutomationRegionView* automation_view;
5718         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5719                 lines.push_back (audio_view->get_gain_line ());
5720         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5721                 lines.push_back (automation_view->line ());
5722                 _integral = true;
5723         } else {
5724                 error << _("Automation range drag created for invalid region type") << endmsg;
5725         }
5726
5727         setup (lines);
5728 }
5729
5730 /** @param lines AutomationLines to drag.
5731  *  @param offset Offset from the session start to the points in the AutomationLines.
5732  */
5733 void
5734 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5735 {
5736         /* find the lines that overlap the ranges being dragged */
5737         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5738         while (i != lines.end ()) {
5739                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5740                 ++j;
5741
5742                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5743
5744                 /* check this range against all the AudioRanges that we are using */
5745                 list<AudioRange>::const_iterator k = _ranges.begin ();
5746                 while (k != _ranges.end()) {
5747                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5748                                 break;
5749                         }
5750                         ++k;
5751                 }
5752
5753                 /* add it to our list if it overlaps at all */
5754                 if (k != _ranges.end()) {
5755                         Line n;
5756                         n.line = *i;
5757                         n.state = 0;
5758                         n.range = r;
5759                         _lines.push_back (n);
5760                 }
5761
5762                 i = j;
5763         }
5764
5765         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5766 }
5767
5768 double
5769 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5770 {
5771         return 1.0 - ((global_y - _y_origin) / line->height());
5772 }
5773
5774 double
5775 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5776 {
5777         const double v = list->eval(x);
5778         return _integral ? rint(v) : v;
5779 }
5780
5781 void
5782 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5783 {
5784         Drag::start_grab (event, cursor);
5785
5786         /* Get line states before we start changing things */
5787         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5788                 i->state = &i->line->get_state ();
5789                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5790         }
5791
5792         if (_ranges.empty()) {
5793
5794                 /* No selected time ranges: drag all points */
5795                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5796                         uint32_t const N = i->line->npoints ();
5797                         for (uint32_t j = 0; j < N; ++j) {
5798                                 i->points.push_back (i->line->nth (j));
5799                         }
5800                 }
5801
5802         }
5803
5804         if (_nothing_to_drag) {
5805                 return;
5806         }
5807 }
5808
5809 void
5810 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5811 {
5812         if (_nothing_to_drag && !first_move) {
5813                 return;
5814         }
5815
5816         if (first_move) {
5817                 _editor->begin_reversible_command (_("automation range move"));
5818
5819                 if (!_ranges.empty()) {
5820
5821                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5822
5823                                 framecnt_t const half = (i->start + i->end) / 2;
5824
5825                                 /* find the line that this audio range starts in */
5826                                 list<Line>::iterator j = _lines.begin();
5827                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5828                                         ++j;
5829                                 }
5830
5831                                 if (j != _lines.end()) {
5832                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5833
5834                                 /* j is the line that this audio range starts in; fade into it;
5835                                    64 samples length plucked out of thin air.
5836                                 */
5837
5838                                         framepos_t a = i->start + 64;
5839                                         if (a > half) {
5840                                                 a = half;
5841                                         }
5842
5843                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5844                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5845
5846                                         XMLNode &before = the_list->get_state();
5847                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5848                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5849
5850                                         if (add_p || add_q) {
5851                                                 _editor->session()->add_command (
5852                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5853                                         }
5854                                 }
5855
5856                                 /* same thing for the end */
5857
5858                                 j = _lines.begin();
5859                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5860                                         ++j;
5861                                 }
5862
5863                                 if (j != _lines.end()) {
5864                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5865
5866                                         /* j is the line that this audio range starts in; fade out of it;
5867                                            64 samples length plucked out of thin air.
5868                                         */
5869
5870                                         framepos_t b = i->end - 64;
5871                                         if (b < half) {
5872                                                 b = half;
5873                                         }
5874
5875                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5876                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5877
5878                                         XMLNode &before = the_list->get_state();
5879                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5880                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5881
5882                                         if (add_p || add_q) {
5883                                                 _editor->session()->add_command (
5884                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5885                                         }
5886                                 }
5887                         }
5888
5889                         _nothing_to_drag = true;
5890
5891                         /* Find all the points that should be dragged and put them in the relevant
5892                            points lists in the Line structs.
5893                         */
5894
5895                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5896
5897                                 uint32_t const N = i->line->npoints ();
5898                                 for (uint32_t j = 0; j < N; ++j) {
5899
5900                                         /* here's a control point on this line */
5901                                         ControlPoint* p = i->line->nth (j);
5902                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5903
5904                                         /* see if it's inside a range */
5905                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5906                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5907                                                 ++k;
5908                                         }
5909
5910                                         if (k != _ranges.end()) {
5911                                                 /* dragging this point */
5912                                                 _nothing_to_drag = false;
5913                                                 i->points.push_back (p);
5914                                         }
5915                                 }
5916                         }
5917                 }
5918
5919                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5920                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5921                 }
5922         }
5923
5924         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5925                 float const f = y_fraction (l->line, current_pointer_y());
5926                 /* we are ignoring x position for this drag, so we can just pass in anything */
5927                 pair<double, float> result;
5928                 uint32_t ignored;
5929                 result = l->line->drag_motion (0, f, true, false, ignored);
5930                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5931         }
5932 }
5933
5934 void
5935 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5936 {
5937         if (_nothing_to_drag || !motion_occurred) {
5938                 return;
5939         }
5940
5941         motion (event, false);
5942         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5943                 i->line->end_drag (false, 0);
5944         }
5945
5946         _editor->commit_reversible_command ();
5947 }
5948
5949 void
5950 AutomationRangeDrag::aborted (bool)
5951 {
5952         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5953                 i->line->reset ();
5954         }
5955 }
5956
5957 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
5958         : view (v)
5959         , initial_time_axis_view (itav)
5960 {
5961         /* note that time_axis_view may be null if the regionview was created
5962          * as part of a copy operation.
5963          */
5964         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
5965         layer = v->region()->layer ();
5966         initial_y = v->get_canvas_group()->position().y;
5967         initial_playlist = v->region()->playlist ();
5968         initial_position = v->region()->position ();
5969         initial_end = v->region()->position () + v->region()->length ();
5970 }
5971
5972 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
5973         : Drag (e, i->canvas_item ())
5974         , _region_view (r)
5975         , _patch_change (i)
5976         , _cumulative_dx (0)
5977 {
5978         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
5979                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
5980                                                    grab_frame()));
5981 }
5982
5983 void
5984 PatchChangeDrag::motion (GdkEvent* ev, bool)
5985 {
5986         framepos_t f = adjusted_current_frame (ev);
5987         boost::shared_ptr<Region> r = _region_view->region ();
5988         f = max (f, r->position ());
5989         f = min (f, r->last_frame ());
5990
5991         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
5992         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
5993         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
5994         _cumulative_dx = dxu;
5995 }
5996
5997 void
5998 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
5999 {
6000         if (!movement_occurred) {
6001                 return;
6002         }
6003
6004         boost::shared_ptr<Region> r (_region_view->region ());
6005         framepos_t f = adjusted_current_frame (ev);
6006         f = max (f, r->position ());
6007         f = min (f, r->last_frame ());
6008
6009         _region_view->move_patch_change (
6010                 *_patch_change,
6011                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6012                 );
6013 }
6014
6015 void
6016 PatchChangeDrag::aborted (bool)
6017 {
6018         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6019 }
6020
6021 void
6022 PatchChangeDrag::setup_pointer_frame_offset ()
6023 {
6024         boost::shared_ptr<Region> region = _region_view->region ();
6025         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6026 }
6027
6028 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6029         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6030         , _region_view (rv)
6031 {
6032
6033 }
6034
6035 void
6036 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6037 {
6038         _region_view->update_drag_selection (
6039                 x1, x2, y1, y2,
6040                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6041 }
6042
6043 void
6044 MidiRubberbandSelectDrag::deselect_things ()
6045 {
6046         /* XXX */
6047 }
6048
6049 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6050         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6051         , _region_view (rv)
6052 {
6053         _vertical_only = true;
6054 }
6055
6056 void
6057 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6058 {
6059         double const y = _region_view->midi_view()->y_position ();
6060
6061         y1 = max (0.0, y1 - y);
6062         y2 = max (0.0, y2 - y);
6063
6064         _region_view->update_vertical_drag_selection (
6065                 y1,
6066                 y2,
6067                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6068                 );
6069 }
6070
6071 void
6072 MidiVerticalSelectDrag::deselect_things ()
6073 {
6074         /* XXX */
6075 }
6076
6077 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6078         : RubberbandSelectDrag (e, i)
6079 {
6080
6081 }
6082
6083 void
6084 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6085 {
6086         if (drag_in_progress) {
6087                 /* We just want to select things at the end of the drag, not during it */
6088                 return;
6089         }
6090
6091         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6092
6093         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6094
6095         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6096
6097         _editor->commit_reversible_selection_op ();
6098 }
6099
6100 void
6101 EditorRubberbandSelectDrag::deselect_things ()
6102 {
6103         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6104
6105         _editor->selection->clear_tracks();
6106         _editor->selection->clear_regions();
6107         _editor->selection->clear_points ();
6108         _editor->selection->clear_lines ();
6109         _editor->selection->clear_midi_notes ();
6110
6111         _editor->commit_reversible_selection_op();
6112 }
6113
6114 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6115         : Drag (e, i)
6116         , _region_view (rv)
6117         , _drag_rect (0)
6118 {
6119         _note[0] = _note[1] = 0;
6120 }
6121
6122 NoteCreateDrag::~NoteCreateDrag ()
6123 {
6124         delete _drag_rect;
6125 }
6126
6127 framecnt_t
6128 NoteCreateDrag::grid_frames (framepos_t t) const
6129 {
6130         bool success;
6131         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6132         if (!success) {
6133                 grid_beats = Evoral::Beats(1);
6134         }
6135
6136         return _region_view->region_beats_to_region_frames (grid_beats);
6137 }
6138
6139 void
6140 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6141 {
6142         Drag::start_grab (event, cursor);
6143
6144         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6145
6146         framepos_t pf = _drags->current_pointer_frame ();
6147         framecnt_t const g = grid_frames (pf);
6148
6149         /* Hack so that we always snap to the note that we are over, instead of snapping
6150            to the next one if we're more than halfway through the one we're over.
6151         */
6152         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6153                 pf -= g / 2;
6154         }
6155
6156         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6157         _note[1] = _note[0];
6158
6159         MidiStreamView* sv = _region_view->midi_stream_view ();
6160         double const x = _editor->sample_to_pixel (_note[0]);
6161         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6162
6163         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6164         _drag_rect->set_outline_all ();
6165         _drag_rect->set_outline_color (0xffffff99);
6166         _drag_rect->set_fill_color (0xffffff66);
6167 }
6168
6169 void
6170 NoteCreateDrag::motion (GdkEvent* event, bool)
6171 {
6172         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6173         double const x0 = _editor->sample_to_pixel (_note[0]);
6174         double const x1 = _editor->sample_to_pixel (_note[1]);
6175         _drag_rect->set_x0 (std::min(x0, x1));
6176         _drag_rect->set_x1 (std::max(x0, x1));
6177 }
6178
6179 void
6180 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6181 {
6182         if (!had_movement) {
6183                 return;
6184         }
6185
6186         framepos_t const start = min (_note[0], _note[1]);
6187         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6188
6189         framecnt_t const g = grid_frames (start);
6190         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6191
6192         if (_editor->snap_mode() == SnapNormal && length < g) {
6193                 length = g;
6194         }
6195
6196         Evoral::Beats length_beats = max (
6197                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6198
6199         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6200 }
6201
6202 double
6203 NoteCreateDrag::y_to_region (double y) const
6204 {
6205         double x = 0;
6206         _region_view->get_canvas_group()->canvas_to_item (x, y);
6207         return y;
6208 }
6209
6210 void
6211 NoteCreateDrag::aborted (bool)
6212 {
6213
6214 }
6215
6216 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6217         : Drag (e, i)
6218         , arv (rv)
6219         , start (start_yn)
6220 {
6221         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6222 }
6223
6224 void
6225 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6226 {
6227         Drag::start_grab (event, cursor);
6228 }
6229
6230 void
6231 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6232 {
6233         double distance;
6234         double new_length;
6235         framecnt_t len;
6236
6237         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6238
6239         if (start) {
6240                 distance = _drags->current_pointer_x() - grab_x();
6241                 len = ar->fade_in()->back()->when;
6242         } else {
6243                 distance = grab_x() - _drags->current_pointer_x();
6244                 len = ar->fade_out()->back()->when;
6245         }
6246
6247         /* how long should it be ? */
6248
6249         new_length = len + _editor->pixel_to_sample (distance);
6250
6251         /* now check with the region that this is legal */
6252
6253         new_length = ar->verify_xfade_bounds (new_length, start);
6254
6255         if (start) {
6256                 arv->reset_fade_in_shape_width (ar, new_length);
6257         } else {
6258                 arv->reset_fade_out_shape_width (ar, new_length);
6259         }
6260 }
6261
6262 void
6263 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6264 {
6265         double distance;
6266         double new_length;
6267         framecnt_t len;
6268
6269         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6270
6271         if (start) {
6272                 distance = _drags->current_pointer_x() - grab_x();
6273                 len = ar->fade_in()->back()->when;
6274         } else {
6275                 distance = grab_x() - _drags->current_pointer_x();
6276                 len = ar->fade_out()->back()->when;
6277         }
6278
6279         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6280
6281         _editor->begin_reversible_command ("xfade trim");
6282         ar->playlist()->clear_owned_changes ();
6283
6284         if (start) {
6285                 ar->set_fade_in_length (new_length);
6286         } else {
6287                 ar->set_fade_out_length (new_length);
6288         }
6289
6290         /* Adjusting the xfade may affect other regions in the playlist, so we need
6291            to get undo Commands from the whole playlist rather than just the
6292            region.
6293         */
6294
6295         vector<Command*> cmds;
6296         ar->playlist()->rdiff (cmds);
6297         _editor->session()->add_commands (cmds);
6298         _editor->commit_reversible_command ();
6299
6300 }
6301
6302 void
6303 CrossfadeEdgeDrag::aborted (bool)
6304 {
6305         if (start) {
6306                 // arv->redraw_start_xfade ();
6307         } else {
6308                 // arv->redraw_end_xfade ();
6309         }
6310 }
6311
6312 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6313         : Drag (e, item, true)
6314         , line (new EditorCursor (*e))
6315 {
6316         line->set_position (pos);
6317         line->show ();
6318 }
6319
6320 RegionCutDrag::~RegionCutDrag ()
6321 {
6322         delete line;
6323 }
6324
6325 void
6326 RegionCutDrag::motion (GdkEvent*, bool)
6327 {
6328         framepos_t where = _drags->current_pointer_frame();
6329         _editor->snap_to (where);
6330
6331         line->set_position (where);
6332 }
6333
6334 void
6335 RegionCutDrag::finished (GdkEvent*, bool)
6336 {
6337         _editor->get_track_canvas()->canvas()->re_enter();
6338
6339         framepos_t pos = _drags->current_pointer_frame();
6340
6341         line->hide ();
6342
6343         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6344
6345         if (rs.empty()) {
6346                 return;
6347         }
6348
6349         _editor->split_regions_at (pos, rs);
6350 }
6351
6352 void
6353 RegionCutDrag::aborted (bool)
6354 {
6355 }