gtk2_ardour/editor_drag.cc

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