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                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3187                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3188
3189                 }
3190         }
3191
3192         framepos_t const pf = adjusted_current_frame (event, false);
3193         if (_marker->meter().position_lock_style() == MusicTime) {
3194                 TempoMap& map (_editor->session()->tempo_map());
3195                 Timecode::BBT_Time bbt;
3196                 map.bbt_time (pf, bbt);
3197                 /* round bbt to bars */
3198                 map.round_bbt (bbt, -1, RoundNearest);
3199
3200                 if ((bbt.bars != _real_section->bbt().bars && pf > last_pointer_frame())
3201                     || (bbt.bars < _real_section->bbt().bars && pf < last_pointer_frame())) {
3202
3203                         /* move meter beat-based */
3204                         _editor->session()->tempo_map().gui_move_meter_bbt (_real_section, bbt);
3205                 }
3206         } else {
3207                 /* AudioTime */
3208                 /* move meter frame-based */
3209                 _editor->session()->tempo_map().gui_move_meter_frame (_real_section, pf);
3210         }
3211         _marker->set_position (pf);
3212         show_verbose_cursor_time (_real_section->frame());
3213 }
3214
3215 void
3216 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3217 {
3218         if (!movement_occurred) {
3219                 if (was_double_click()) {
3220                         _editor->edit_meter_marker (*_marker);
3221                 }
3222                 return;
3223         }
3224
3225         TempoMap& map (_editor->session()->tempo_map());
3226
3227         XMLNode &after = map.get_state();
3228         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3229         _editor->commit_reversible_command ();
3230
3231         // delete the dummy marker we used for visual representation while moving.
3232         // a new visual marker will show up automatically.
3233         delete _marker;
3234 }
3235
3236 void
3237 MeterMarkerDrag::aborted (bool moved)
3238 {
3239         _marker->set_position (_marker->meter().frame ());
3240         if (moved) {
3241                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3242                 // delete the dummy marker we used for visual representation while moving.
3243                 // a new visual marker will show up automatically.
3244                 delete _marker;
3245         }
3246 }
3247
3248 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3249         : Drag (e, i)
3250         , _copy (c)
3251         , before_state (0)
3252 {
3253         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3254
3255         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3256         _real_section = &_marker->tempo();
3257         _movable = _real_section->movable();
3258         assert (_marker);
3259 }
3260
3261 void
3262 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3263 {
3264         Drag::start_grab (event, cursor);
3265         if (!_real_section->active()) {
3266                 show_verbose_cursor_text (_("inactive"));
3267         } else {
3268                 show_verbose_cursor_time (adjusted_current_frame (event));
3269         }
3270 }
3271
3272 void
3273 TempoMarkerDrag::setup_pointer_frame_offset ()
3274 {
3275         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3276 }
3277
3278 void
3279 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3280 {
3281         if (!_real_section->active()) {
3282                 return;
3283         }
3284         if (first_move) {
3285
3286                 // mvc drag - create a dummy marker to catch events, hide it.
3287
3288                 char name[64];
3289                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3290
3291                 TempoSection section (_marker->tempo());
3292
3293                 _marker = new TempoMarker (
3294                         *_editor,
3295                         *_editor->tempo_group,
3296                         UIConfiguration::instance().color ("tempo marker"),
3297                         name,
3298                         *new TempoSection (_marker->tempo())
3299                         );
3300
3301                 /* use the new marker for the grab */
3302                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3303                 _marker->hide();
3304
3305                 TempoMap& map (_editor->session()->tempo_map());
3306                 /* get current state */
3307                 before_state = &map.get_state();
3308                 if (!_copy) {
3309                         _editor->begin_reversible_command (_("move tempo mark"));
3310                 } else {
3311                         _editor->begin_reversible_command (_("copy tempo mark"));
3312                         framepos_t frame;
3313                         bool use_snap = false;
3314
3315                         if (!_editor->snap_musical()) {
3316                                 frame = adjusted_current_frame (event);
3317                         } else {
3318                                 frame = adjusted_current_frame (event, false);
3319                                 if (ArdourKeyboard::indicates_snap (event->button.state)) {
3320                                         if (_editor->snap_mode() == Editing::SnapOff) {
3321                                                 use_snap = true;
3322                                         } else {
3323                                                 use_snap = false;
3324                                         }
3325                                 } else {
3326                                         if (_editor->snap_mode() == Editing::SnapOff) {
3327                                                 use_snap = false;
3328                                         } else {
3329                                                 use_snap = true;
3330                                         }
3331                                 }
3332                         }
3333
3334                         Timecode::BBT_Time bbt;
3335                         map.bbt_time (frame, bbt);
3336
3337                         /* add new tempo section to map, ensuring we don't refer to existing tempos for snap */
3338
3339                         if (_real_section->position_lock_style() == MusicTime) {
3340                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3341                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3342                                 } else if (use_snap) {
3343                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3344                                 }
3345                                 double const pulse = map.predict_tempo_pulse (_real_section, map.frame_time (bbt));
3346                                 _real_section = map.add_tempo (_marker->tempo(), pulse, 0, _real_section->type(), MusicTime);
3347                         } else {
3348                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3349                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3350                                 } else if (use_snap) {
3351                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3352                                 }
3353                                 if (use_snap) {
3354                                         frame = map.predict_tempo_frame (_real_section, bbt);
3355                                 }
3356                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3357                         }
3358                 }
3359
3360         }
3361
3362         framepos_t pf;
3363
3364         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3365                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3366                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3367                 stringstream strs;
3368                 strs << new_bpm;
3369                 show_verbose_cursor_text (strs.str());
3370         } else if (_movable && !_real_section->locked_to_meter()) {
3371                 if (!_editor->snap_musical()) {
3372                         /* snap normally (this is not self-referential).*/
3373                         pf = adjusted_current_frame (event);
3374                 } else {
3375                         /* but this is.
3376                            we can't use the map for anything related to tempo,
3377                            so we round bbt using meters, which have no dependency
3378                            on pulse for this kind of thing.
3379                         */
3380                         bool use_snap;
3381                         TempoMap& map (_editor->session()->tempo_map());
3382
3383                         pf = adjusted_current_frame (event, false);
3384                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
3385                                 if (_editor->snap_mode() == Editing::SnapOff) {
3386                                         use_snap = true;
3387                                 } else {
3388                                         use_snap = false;
3389                                 }
3390                         } else {
3391                                 if (_editor->snap_mode() == Editing::SnapOff) {
3392                                         use_snap = false;
3393                                 } else {
3394                                         use_snap = true;
3395                                 }
3396                         }
3397
3398                         Timecode::BBT_Time when;
3399                         map.bbt_time (pf, when);
3400
3401                         if (_real_section->position_lock_style() == MusicTime) {
3402
3403                                 const double pulse = map.predict_tempo_pulse (_real_section, pf);
3404                                 when = map.pulse_to_bbt (pulse);
3405                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3406                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3407                                 } else if (use_snap) {
3408                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3409                                 }
3410
3411                                 const double beat = map.bbt_to_beats (when);
3412                                 map.gui_move_tempo_beat (_real_section, beat);
3413                         } else {
3414                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3415                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3416                                 } else if (use_snap) {
3417                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3418                                 }
3419                                 if (use_snap) {
3420                                         pf = map.predict_tempo_frame (_real_section, when);
3421                                 }
3422                                 map.gui_move_tempo_frame (_real_section, pf);
3423                         }
3424                 }
3425
3426                 show_verbose_cursor_time (_real_section->frame());
3427         }
3428         _marker->set_position (pf);
3429 }
3430
3431 void
3432 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3433 {
3434         if (!_real_section->active()) {
3435                 return;
3436         }
3437         if (!movement_occurred) {
3438                 if (was_double_click()) {
3439                         _editor->edit_tempo_marker (*_marker);
3440                 }
3441                 return;
3442         }
3443
3444         TempoMap& map (_editor->session()->tempo_map());
3445
3446         XMLNode &after = map.get_state();
3447         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3448         _editor->commit_reversible_command ();
3449
3450         // delete the dummy marker we used for visual representation while moving.
3451         // a new visual marker will show up automatically.
3452         delete _marker;
3453 }
3454
3455 void
3456 TempoMarkerDrag::aborted (bool moved)
3457 {
3458         _marker->set_position (_marker->tempo().frame());
3459         if (moved) {
3460                 TempoMap& map (_editor->session()->tempo_map());
3461                 map.set_state (*before_state, Stateful::current_state_version);
3462                 // delete the dummy marker we used for visual representation while moving.
3463                 // a new visual marker will show up automatically.
3464                 delete _marker;
3465         }
3466 }
3467
3468 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3469         : Drag (e, i)
3470         , _pulse (0.0)
3471         , _beat (0.0)
3472         , _tempo (0)
3473         , before_state (0)
3474 {
3475         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3476
3477 }
3478
3479 void
3480 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3481 {
3482         Drag::start_grab (event, cursor);
3483
3484         TempoMap& map (_editor->session()->tempo_map());
3485         ostringstream sstr;
3486
3487         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3488         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3489         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3490         show_verbose_cursor_text (sstr.str());
3491         finished (event, false);
3492 }
3493
3494 void
3495 BBTRulerDrag::setup_pointer_frame_offset ()
3496 {
3497         TempoMap& map (_editor->session()->tempo_map());
3498         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3499         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3500         if (divisions > 0) {
3501                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3502         } else {
3503                 /* while it makes some sense for the user to determine the division to 'grab',
3504                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3505                    and the result over steep tempo curves. Use sixteenths.
3506                 */
3507                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3508         }
3509         _pulse = map.pulse_at_beat (_beat);
3510         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3511 }
3512
3513 void
3514 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3515 {
3516         TempoMap& map (_editor->session()->tempo_map());
3517
3518         if (first_move) {
3519                 /* get current state */
3520                 before_state = &map.get_state();
3521                 _editor->begin_reversible_command (_("dilate tempo"));
3522         }
3523
3524         framepos_t const pf = adjusted_current_frame (event, false);
3525
3526         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3527                 /* adjust previous tempo to match pointer frame */
3528                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3529         }
3530         ostringstream sstr;
3531         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3532         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3533         show_verbose_cursor_text (sstr.str());
3534 }
3535
3536 void
3537 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3538 {
3539         if (!movement_occurred) {
3540                 return;
3541         }
3542
3543         TempoMap& map (_editor->session()->tempo_map());
3544
3545         XMLNode &after = map.get_state();
3546         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3547         _editor->commit_reversible_command ();
3548 }
3549
3550 void
3551 BBTRulerDrag::aborted (bool moved)
3552 {
3553         if (moved) {
3554                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3555         }
3556 }
3557
3558
3559 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3560         : Drag (e, &c.track_canvas_item(), false)
3561         , _cursor (c)
3562         , _stop (s)
3563         , _grab_zoom (0.0)
3564 {
3565         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3566 }
3567
3568 /** Do all the things we do when dragging the playhead to make it look as though
3569  *  we have located, without actually doing the locate (because that would cause
3570  *  the diskstream buffers to be refilled, which is too slow).
3571  */
3572 void
3573 CursorDrag::fake_locate (framepos_t t)
3574 {
3575         if (_editor->session () == 0) {
3576                 return;
3577         }
3578
3579         _editor->playhead_cursor->set_position (t);
3580
3581         Session* s = _editor->session ();
3582         if (s->timecode_transmission_suspended ()) {
3583                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3584                 /* This is asynchronous so it will be sent "now"
3585                  */
3586                 s->send_mmc_locate (f);
3587                 /* These are synchronous and will be sent during the next
3588                    process cycle
3589                 */
3590                 s->queue_full_time_code ();
3591                 s->queue_song_position_pointer ();
3592         }
3593
3594         show_verbose_cursor_time (t);
3595         _editor->UpdateAllTransportClocks (t);
3596 }
3597
3598 void
3599 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3600 {
3601         Drag::start_grab (event, c);
3602         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3603
3604         _grab_zoom = _editor->samples_per_pixel;
3605
3606         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3607
3608         _editor->snap_to_with_modifier (where, event);
3609
3610         _editor->_dragging_playhead = true;
3611
3612         Session* s = _editor->session ();
3613
3614         /* grab the track canvas item as well */
3615
3616         _cursor.track_canvas_item().grab();
3617
3618         if (s) {
3619                 if (_was_rolling && _stop) {
3620                         s->request_stop ();
3621                 }
3622
3623                 if (s->is_auditioning()) {
3624                         s->cancel_audition ();
3625                 }
3626
3627
3628                 if (AudioEngine::instance()->connected()) {
3629
3630                         /* do this only if we're the engine is connected
3631                          * because otherwise this request will never be
3632                          * serviced and we'll busy wait forever. likewise,
3633                          * notice if we are disconnected while waiting for the
3634                          * request to be serviced.
3635                          */
3636
3637                         s->request_suspend_timecode_transmission ();
3638                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3639                                 /* twiddle our thumbs */
3640                         }
3641                 }
3642         }
3643
3644         fake_locate (where - snap_delta (event->button.state));
3645 }
3646
3647 void
3648 CursorDrag::motion (GdkEvent* event, bool)
3649 {
3650         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3651         _editor->snap_to_with_modifier (where, event);
3652         if (where != last_pointer_frame()) {
3653                 fake_locate (where - snap_delta (event->button.state));
3654         }
3655 }
3656
3657 void
3658 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3659 {
3660         _editor->_dragging_playhead = false;
3661
3662         _cursor.track_canvas_item().ungrab();
3663
3664         if (!movement_occurred && _stop) {
3665                 return;
3666         }
3667
3668         motion (event, false);
3669
3670         Session* s = _editor->session ();
3671         if (s) {
3672                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3673                 _editor->_pending_locate_request = true;
3674                 s->request_resume_timecode_transmission ();
3675         }
3676 }
3677
3678 void
3679 CursorDrag::aborted (bool)
3680 {
3681         _cursor.track_canvas_item().ungrab();
3682
3683         if (_editor->_dragging_playhead) {
3684                 _editor->session()->request_resume_timecode_transmission ();
3685                 _editor->_dragging_playhead = false;
3686         }
3687
3688         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3689 }
3690
3691 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3692         : RegionDrag (e, i, p, v)
3693 {
3694         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3695 }
3696
3697 void
3698 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3699 {
3700         Drag::start_grab (event, cursor);
3701
3702         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3703         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3704         setup_snap_delta (r->position ());
3705
3706         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3707 }
3708
3709 void
3710 FadeInDrag::setup_pointer_frame_offset ()
3711 {
3712         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3713         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3714         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3715 }
3716
3717 void
3718 FadeInDrag::motion (GdkEvent* event, bool)
3719 {
3720         framecnt_t fade_length;
3721
3722         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3723         _editor->snap_to_with_modifier (pos, event);
3724         pos -= snap_delta (event->button.state);
3725
3726         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3727
3728         if (pos < (region->position() + 64)) {
3729                 fade_length = 64; // this should be a minimum defined somewhere
3730         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3731                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3732         } else {
3733                 fade_length = pos - region->position();
3734         }
3735
3736         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3737
3738                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3739
3740                 if (!tmp) {
3741                         continue;
3742                 }
3743
3744                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3745         }
3746
3747         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3748 }
3749
3750 void
3751 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3752 {
3753         if (!movement_occurred) {
3754                 return;
3755         }
3756
3757         framecnt_t fade_length;
3758         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3759         _editor->snap_to_with_modifier (pos, event);
3760         pos -= snap_delta (event->button.state);
3761
3762         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3763
3764         if (pos < (region->position() + 64)) {
3765                 fade_length = 64; // this should be a minimum defined somewhere
3766         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3767                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3768         } else {
3769                 fade_length = pos - region->position();
3770         }
3771
3772         bool in_command = false;
3773
3774         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3775
3776                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3777
3778                 if (!tmp) {
3779                         continue;
3780                 }
3781
3782                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3783                 XMLNode &before = alist->get_state();
3784
3785                 tmp->audio_region()->set_fade_in_length (fade_length);
3786                 tmp->audio_region()->set_fade_in_active (true);
3787
3788                 if (!in_command) {
3789                         _editor->begin_reversible_command (_("change fade in length"));
3790                         in_command = true;
3791                 }
3792                 XMLNode &after = alist->get_state();
3793                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3794         }
3795
3796         if (in_command) {
3797                 _editor->commit_reversible_command ();
3798         }
3799 }
3800
3801 void
3802 FadeInDrag::aborted (bool)
3803 {
3804         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3805                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3806
3807                 if (!tmp) {
3808                         continue;
3809                 }
3810
3811                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3812         }
3813 }
3814
3815 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3816         : RegionDrag (e, i, p, v)
3817 {
3818         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3819 }
3820
3821 void
3822 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3823 {
3824         Drag::start_grab (event, cursor);
3825
3826         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3827         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3828         setup_snap_delta (r->last_frame ());
3829
3830         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3831 }
3832
3833 void
3834 FadeOutDrag::setup_pointer_frame_offset ()
3835 {
3836         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3837         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3838         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3839 }
3840
3841 void
3842 FadeOutDrag::motion (GdkEvent* event, bool)
3843 {
3844         framecnt_t fade_length;
3845
3846         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3847         _editor->snap_to_with_modifier (pos, event);
3848         pos -= snap_delta (event->button.state);
3849
3850         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3851
3852         if (pos > (region->last_frame() - 64)) {
3853                 fade_length = 64; // this should really be a minimum fade defined somewhere
3854         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3855                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3856         } else {
3857                 fade_length = region->last_frame() - pos;
3858         }
3859
3860         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3861
3862                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3863
3864                 if (!tmp) {
3865                         continue;
3866                 }
3867
3868                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3869         }
3870
3871         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3872 }
3873
3874 void
3875 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3876 {
3877         if (!movement_occurred) {
3878                 return;
3879         }
3880
3881         framecnt_t fade_length;
3882
3883         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3884         _editor->snap_to_with_modifier (pos, event);
3885         pos -= snap_delta (event->button.state);
3886
3887         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3888
3889         if (pos > (region->last_frame() - 64)) {
3890                 fade_length = 64; // this should really be a minimum fade defined somewhere
3891         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3892                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3893         } else {
3894                 fade_length = region->last_frame() - pos;
3895         }
3896
3897         bool in_command = false;
3898
3899         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3900
3901                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3902
3903                 if (!tmp) {
3904                         continue;
3905                 }
3906
3907                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3908                 XMLNode &before = alist->get_state();
3909
3910                 tmp->audio_region()->set_fade_out_length (fade_length);
3911                 tmp->audio_region()->set_fade_out_active (true);
3912
3913                 if (!in_command) {
3914                         _editor->begin_reversible_command (_("change fade out length"));
3915                         in_command = true;
3916                 }
3917                 XMLNode &after = alist->get_state();
3918                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3919         }
3920
3921         if (in_command) {
3922                 _editor->commit_reversible_command ();
3923         }
3924 }
3925
3926 void
3927 FadeOutDrag::aborted (bool)
3928 {
3929         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3930                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3931
3932                 if (!tmp) {
3933                         continue;
3934                 }
3935
3936                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3937         }
3938 }
3939
3940 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3941         : Drag (e, i)
3942         , _selection_changed (false)
3943 {
3944         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3945         Gtk::Window* toplevel = _editor->current_toplevel();
3946         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3947
3948         assert (_marker);
3949
3950         _points.push_back (ArdourCanvas::Duple (0, 0));
3951
3952         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3953 }
3954
3955 MarkerDrag::~MarkerDrag ()
3956 {
3957         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3958                 delete i->location;
3959         }
3960 }
3961
3962 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3963 {
3964         location = new Location (*l);
3965         markers.push_back (m);
3966         move_both = false;
3967 }
3968
3969 void
3970 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3971 {
3972         Drag::start_grab (event, cursor);
3973
3974         bool is_start;
3975
3976         Location *location = _editor->find_location_from_marker (_marker, is_start);
3977         _editor->_dragging_edit_point = true;
3978
3979         update_item (location);
3980
3981         // _drag_line->show();
3982         // _line->raise_to_top();
3983
3984         if (is_start) {
3985                 show_verbose_cursor_time (location->start());
3986         } else {
3987                 show_verbose_cursor_time (location->end());
3988         }
3989         setup_snap_delta (is_start ? location->start() : location->end());
3990
3991         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3992
3993         switch (op) {
3994         case Selection::Toggle:
3995                 /* we toggle on the button release */
3996                 break;
3997         case Selection::Set:
3998                 if (!_editor->selection->selected (_marker)) {
3999                         _editor->selection->set (_marker);
4000                         _selection_changed = true;
4001                 }
4002                 break;
4003         case Selection::Extend:
4004         {
4005                 Locations::LocationList ll;
4006                 list<ArdourMarker*> to_add;
4007                 framepos_t s, e;
4008                 _editor->selection->markers.range (s, e);
4009                 s = min (_marker->position(), s);
4010                 e = max (_marker->position(), e);
4011                 s = min (s, e);
4012                 e = max (s, e);
4013                 if (e < max_framepos) {
4014                         ++e;
4015                 }
4016                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
4017                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
4018                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
4019                         if (lm) {
4020                                 if (lm->start) {
4021                                         to_add.push_back (lm->start);
4022                                 }
4023                                 if (lm->end) {
4024                                         to_add.push_back (lm->end);
4025                                 }
4026                         }
4027                 }
4028                 if (!to_add.empty()) {
4029                         _editor->selection->add (to_add);
4030                         _selection_changed = true;
4031                 }
4032                 break;
4033         }
4034         case Selection::Add:
4035                 _editor->selection->add (_marker);
4036                 _selection_changed = true;
4037
4038                 break;
4039         }
4040
4041         /* Set up copies for us to manipulate during the drag
4042          */
4043
4044         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
4045
4046                 Location* l = _editor->find_location_from_marker (*i, is_start);
4047
4048                 if (!l) {
4049                         continue;
4050                 }
4051
4052                 if (l->is_mark()) {
4053                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4054                 } else {
4055                         /* range: check that the other end of the range isn't
4056                            already there.
4057                         */
4058                         CopiedLocationInfo::iterator x;
4059                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4060                                 if (*(*x).location == *l) {
4061                                         break;
4062                                 }
4063                         }
4064                         if (x == _copied_locations.end()) {
4065                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4066                         } else {
4067                                 (*x).markers.push_back (*i);
4068                                 (*x).move_both = true;
4069                         }
4070                 }
4071
4072         }
4073 }
4074
4075 void
4076 MarkerDrag::setup_pointer_frame_offset ()
4077 {
4078         bool is_start;
4079         Location *location = _editor->find_location_from_marker (_marker, is_start);
4080         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4081 }
4082
4083 void
4084 MarkerDrag::motion (GdkEvent* event, bool)
4085 {
4086         framecnt_t f_delta = 0;
4087         bool is_start;
4088         bool move_both = false;
4089         Location *real_location;
4090         Location *copy_location = 0;
4091         framecnt_t const sd = snap_delta (event->button.state);
4092
4093         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4094         framepos_t next = newframe;
4095
4096         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4097                 move_both = true;
4098         }
4099
4100         CopiedLocationInfo::iterator x;
4101
4102         /* find the marker we're dragging, and compute the delta */
4103
4104         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4105
4106                 copy_location = (*x).location;
4107
4108                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4109
4110                         /* this marker is represented by this
4111                          * CopiedLocationMarkerInfo
4112                          */
4113
4114                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4115                                 /* que pasa ?? */
4116                                 return;
4117                         }
4118
4119                         if (real_location->is_mark()) {
4120                                 f_delta = newframe - copy_location->start();
4121                         } else {
4122
4123
4124                                 switch (_marker->type()) {
4125                                 case ArdourMarker::SessionStart:
4126                                 case ArdourMarker::RangeStart:
4127                                 case ArdourMarker::LoopStart:
4128                                 case ArdourMarker::PunchIn:
4129                                         f_delta = newframe - copy_location->start();
4130                                         break;
4131
4132                                 case ArdourMarker::SessionEnd:
4133                                 case ArdourMarker::RangeEnd:
4134                                 case ArdourMarker::LoopEnd:
4135                                 case ArdourMarker::PunchOut:
4136                                         f_delta = newframe - copy_location->end();
4137                                         break;
4138                                 default:
4139                                         /* what kind of marker is this ? */
4140                                         return;
4141                                 }
4142                         }
4143
4144                         break;
4145                 }
4146         }
4147
4148         if (x == _copied_locations.end()) {
4149                 /* hmm, impossible - we didn't find the dragged marker */
4150                 return;
4151         }
4152
4153         /* now move them all */
4154
4155         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4156
4157                 copy_location = x->location;
4158
4159                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4160                         continue;
4161                 }
4162
4163                 if (real_location->locked()) {
4164                         continue;
4165                 }
4166
4167                 if (copy_location->is_mark()) {
4168
4169                         /* now move it */
4170
4171                         copy_location->set_start (copy_location->start() + f_delta);
4172
4173                 } else {
4174
4175                         framepos_t new_start = copy_location->start() + f_delta;
4176                         framepos_t new_end = copy_location->end() + f_delta;
4177
4178                         if (is_start) { // start-of-range marker
4179
4180                                 if (move_both || (*x).move_both) {
4181                                         copy_location->set_start (new_start);
4182                                         copy_location->set_end (new_end);
4183                                 } else  if (new_start < copy_location->end()) {
4184                                         copy_location->set_start (new_start);
4185                                 } else if (newframe > 0) {
4186                                         //_editor->snap_to (next, RoundUpAlways, true);
4187                                         copy_location->set_end (next);
4188                                         copy_location->set_start (newframe);
4189                                 }
4190
4191                         } else { // end marker
4192
4193                                 if (move_both || (*x).move_both) {
4194                                         copy_location->set_end (new_end);
4195                                         copy_location->set_start (new_start);
4196                                 } else if (new_end > copy_location->start()) {
4197                                         copy_location->set_end (new_end);
4198                                 } else if (newframe > 0) {
4199                                         //_editor->snap_to (next, RoundDownAlways, true);
4200                                         copy_location->set_start (next);
4201                                         copy_location->set_end (newframe);
4202                                 }
4203                         }
4204                 }
4205
4206                 update_item (copy_location);
4207
4208                 /* now lookup the actual GUI items used to display this
4209                  * location and move them to wherever the copy of the location
4210                  * is now. This means that the logic in ARDOUR::Location is
4211                  * still enforced, even though we are not (yet) modifying
4212                  * the real Location itself.
4213                  */
4214
4215                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4216
4217                 if (lm) {
4218                         lm->set_position (copy_location->start(), copy_location->end());
4219                 }
4220
4221         }
4222
4223         assert (!_copied_locations.empty());
4224
4225         show_verbose_cursor_time (newframe);
4226 }
4227
4228 void
4229 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4230 {
4231         if (!movement_occurred) {
4232
4233                 if (was_double_click()) {
4234                         _editor->rename_marker (_marker);
4235                         return;
4236                 }
4237
4238                 /* just a click, do nothing but finish
4239                    off the selection process
4240                 */
4241
4242                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4243                 switch (op) {
4244                 case Selection::Set:
4245                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4246                                 _editor->selection->set (_marker);
4247                                 _selection_changed = true;
4248                         }
4249                         break;
4250
4251                 case Selection::Toggle:
4252                         /* we toggle on the button release, click only */
4253                         _editor->selection->toggle (_marker);
4254                         _selection_changed = true;
4255
4256                         break;
4257
4258                 case Selection::Extend:
4259                 case Selection::Add:
4260                         break;
4261                 }
4262
4263                 if (_selection_changed) {
4264                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4265                         _editor->commit_reversible_selection_op();
4266                 }
4267
4268                 return;
4269         }
4270
4271         _editor->_dragging_edit_point = false;
4272
4273         XMLNode &before = _editor->session()->locations()->get_state();
4274         bool in_command = false;
4275
4276         MarkerSelection::iterator i;
4277         CopiedLocationInfo::iterator x;
4278         bool is_start;
4279
4280         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4281              x != _copied_locations.end() && i != _editor->selection->markers.end();
4282              ++i, ++x) {
4283
4284                 Location * location = _editor->find_location_from_marker (*i, is_start);
4285
4286                 if (location) {
4287
4288                         if (location->locked()) {
4289                                 continue;
4290                         }
4291                         if (!in_command) {
4292                                 _editor->begin_reversible_command ( _("move marker") );
4293                                 in_command = true;
4294                         }
4295                         if (location->is_mark()) {
4296                                 location->set_start (((*x).location)->start());
4297                         } else {
4298                                 location->set (((*x).location)->start(), ((*x).location)->end());
4299                         }
4300                 }
4301         }
4302
4303         if (in_command) {
4304                 XMLNode &after = _editor->session()->locations()->get_state();
4305                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4306                 _editor->commit_reversible_command ();
4307         }
4308 }
4309
4310 void
4311 MarkerDrag::aborted (bool movement_occurred)
4312 {
4313         if (!movement_occurred) {
4314                 return;
4315         }
4316
4317         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4318
4319                 /* move all markers to their original location */
4320
4321
4322                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4323
4324                         bool is_start;
4325                         Location * location = _editor->find_location_from_marker (*m, is_start);
4326
4327                         if (location) {
4328                                 (*m)->set_position (is_start ? location->start() : location->end());
4329                         }
4330                 }
4331         }
4332 }
4333
4334 void
4335 MarkerDrag::update_item (Location*)
4336 {
4337         /* noop */
4338 }
4339
4340 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4341         : Drag (e, i)
4342         , _fixed_grab_x (0.0)
4343         , _fixed_grab_y (0.0)
4344         , _cumulative_x_drag (0.0)
4345         , _cumulative_y_drag (0.0)
4346         , _pushing (false)
4347         , _final_index (0)
4348 {
4349         if (_zero_gain_fraction < 0.0) {
4350                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4351         }
4352
4353         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4354
4355         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4356         assert (_point);
4357 }
4358
4359
4360 void
4361 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4362 {
4363         Drag::start_grab (event, _editor->cursors()->fader);
4364
4365         // start the grab at the center of the control point so
4366         // the point doesn't 'jump' to the mouse after the first drag
4367         _fixed_grab_x = _point->get_x();
4368         _fixed_grab_y = _point->get_y();
4369
4370         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4371         setup_snap_delta (pos);
4372
4373         float const fraction = 1 - (_point->get_y() / _point->line().height());
4374         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4375
4376         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4377
4378         if (!_point->can_slide ()) {
4379                 _x_constrained = true;
4380         }
4381 }
4382
4383 void
4384 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4385 {
4386         double dx = _drags->current_pointer_x() - last_pointer_x();
4387         double dy = current_pointer_y() - last_pointer_y();
4388         bool need_snap = true;
4389
4390         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4391                 dx *= 0.1;
4392                 dy *= 0.1;
4393                 need_snap = false;
4394         }
4395
4396         /* coordinate in pixels relative to the start of the region (for region-based automation)
4397            or track (for track-based automation) */
4398         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4399         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4400
4401         // calculate zero crossing point. back off by .01 to stay on the
4402         // positive side of zero
4403         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4404
4405         if (_x_constrained) {
4406                 cx = _fixed_grab_x;
4407         }
4408         if (_y_constrained) {
4409                 cy = _fixed_grab_y;
4410         }
4411
4412         _cumulative_x_drag = cx - _fixed_grab_x;
4413         _cumulative_y_drag = cy - _fixed_grab_y;
4414
4415         cx = max (0.0, cx);
4416         cy = max (0.0, cy);
4417         cy = min ((double) _point->line().height(), cy);
4418
4419         // make sure we hit zero when passing through
4420         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4421                 cy = zero_gain_y;
4422         }
4423
4424         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4425
4426         if (!_x_constrained && need_snap) {
4427                 _editor->snap_to_with_modifier (cx_frames, event);
4428         }
4429
4430         cx_frames -= snap_delta (event->button.state);
4431         cx_frames = min (cx_frames, _point->line().maximum_time());
4432
4433         float const fraction = 1.0 - (cy / _point->line().height());
4434
4435         if (first_motion) {
4436                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4437                 _editor->begin_reversible_command (_("automation event move"));
4438                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4439         }
4440         pair<double, float> result;
4441         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4442
4443         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4444 }
4445
4446 void
4447 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4448 {
4449         if (!movement_occurred) {
4450
4451                 /* just a click */
4452                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4453                         _editor->reset_point_selection ();
4454                 }
4455
4456         } else {
4457                 _point->line().end_drag (_pushing, _final_index);
4458                 _editor->commit_reversible_command ();
4459         }
4460 }
4461
4462 void
4463 ControlPointDrag::aborted (bool)
4464 {
4465         _point->line().reset ();
4466 }
4467
4468 bool
4469 ControlPointDrag::active (Editing::MouseMode m)
4470 {
4471         if (m == Editing::MouseDraw) {
4472                 /* always active in mouse draw */
4473                 return true;
4474         }
4475
4476         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4477         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4478 }
4479
4480 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4481         : Drag (e, i)
4482         , _line (0)
4483         , _fixed_grab_x (0.0)
4484         , _fixed_grab_y (0.0)
4485         , _cumulative_y_drag (0)
4486         , _before (0)
4487         , _after (0)
4488 {
4489         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4490 }
4491
4492 void
4493 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4494 {
4495         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4496         assert (_line);
4497
4498         _item = &_line->grab_item ();
4499
4500         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4501            origin, and ditto for y.
4502         */
4503
4504         double mx = event->button.x;
4505         double my = event->button.y;
4506
4507         _line->grab_item().canvas_to_item (mx, my);
4508
4509         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4510
4511         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4512                 /* no adjacent points */
4513                 return;
4514         }
4515
4516         Drag::start_grab (event, _editor->cursors()->fader);
4517
4518         /* store grab start in item frame */
4519         double const bx = _line->nth (_before)->get_x();
4520         double const ax = _line->nth (_after)->get_x();
4521         double const click_ratio = (ax - mx) / (ax - bx);
4522
4523         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4524
4525         _fixed_grab_x = mx;
4526         _fixed_grab_y = cy;
4527
4528         double fraction = 1.0 - (cy / _line->height());
4529
4530         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4531 }
4532
4533 void
4534 LineDrag::motion (GdkEvent* event, bool first_move)
4535 {
4536         double dy = current_pointer_y() - last_pointer_y();
4537
4538         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4539                 dy *= 0.1;
4540         }
4541
4542         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4543
4544         _cumulative_y_drag = cy - _fixed_grab_y;
4545
4546         cy = max (0.0, cy);
4547         cy = min ((double) _line->height(), cy);
4548
4549         double const fraction = 1.0 - (cy / _line->height());
4550         uint32_t ignored;
4551
4552         if (first_move) {
4553                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4554
4555                 _editor->begin_reversible_command (_("automation range move"));
4556                 _line->start_drag_line (_before, _after, initial_fraction);
4557         }
4558
4559         /* we are ignoring x position for this drag, so we can just pass in anything */
4560         pair<double, float> result;
4561
4562         result = _line->drag_motion (0, fraction, true, false, ignored);
4563         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4564 }
4565
4566 void
4567 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4568 {
4569         if (movement_occurred) {
4570                 motion (event, false);
4571                 _line->end_drag (false, 0);
4572                 _editor->commit_reversible_command ();
4573         } else {
4574                 /* add a new control point on the line */
4575
4576                 AutomationTimeAxisView* atv;
4577
4578                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4579                         framepos_t where = grab_frame ();
4580
4581                         double cx = 0;
4582                         double cy = _fixed_grab_y;
4583
4584                         _line->grab_item().item_to_canvas (cx, cy);
4585
4586                         atv->add_automation_event (event, where, cy, false);
4587                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4588                         AudioRegionView* arv;
4589
4590                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4591                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4592                         }
4593                 }
4594         }
4595 }
4596
4597 void
4598 LineDrag::aborted (bool)
4599 {
4600         _line->reset ();
4601 }
4602
4603 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4604         : Drag (e, i),
4605           _line (0),
4606           _arv (0),
4607           _region_view_grab_x (0.0),
4608           _cumulative_x_drag (0),
4609           _before (0.0),
4610           _max_x (0)
4611 {
4612         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4613 }
4614
4615 void
4616 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4617 {
4618         Drag::start_grab (event);
4619
4620         _line = reinterpret_cast<Line*> (_item);
4621         assert (_line);
4622
4623         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4624
4625         double cx = event->button.x;
4626         double cy = event->button.y;
4627
4628         _item->parent()->canvas_to_item (cx, cy);
4629
4630         /* store grab start in parent frame */
4631         _region_view_grab_x = cx;
4632
4633         _before = *(float*) _item->get_data ("position");
4634
4635         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4636
4637         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4638 }
4639
4640 void
4641 FeatureLineDrag::motion (GdkEvent*, bool)
4642 {
4643         double dx = _drags->current_pointer_x() - last_pointer_x();
4644
4645         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4646
4647         _cumulative_x_drag += dx;
4648
4649         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4650
4651         if (cx > _max_x){
4652                 cx = _max_x;
4653         }
4654         else if(cx < 0){
4655                 cx = 0;
4656         }
4657
4658         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4659         assert (bbox);
4660         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4661
4662         float *pos = new float;
4663         *pos = cx;
4664
4665         _line->set_data ("position", pos);
4666
4667         _before = cx;
4668 }
4669
4670 void
4671 FeatureLineDrag::finished (GdkEvent*, bool)
4672 {
4673         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4674         _arv->update_transient(_before, _before);
4675 }
4676
4677 void
4678 FeatureLineDrag::aborted (bool)
4679 {
4680         //_line->reset ();
4681 }
4682
4683 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4684         : Drag (e, i)
4685         , _vertical_only (false)
4686 {
4687         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4688 }
4689
4690 void
4691 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4692 {
4693         Drag::start_grab (event);
4694         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4695 }
4696
4697 void
4698 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4699 {
4700         framepos_t start;
4701         framepos_t end;
4702         double y1;
4703         double y2;
4704
4705         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4706
4707         framepos_t grab = grab_frame ();
4708         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4709                 _editor->snap_to_with_modifier (grab, event);
4710         } else {
4711                 grab = raw_grab_frame ();
4712         }
4713
4714         /* base start and end on initial click position */
4715
4716         if (pf < grab) {
4717                 start = pf;
4718                 end = grab;
4719         } else {
4720                 end = pf;
4721                 start = grab;
4722         }
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         if (start != end || y1 != y2) {
4733
4734                 double x1 = _editor->sample_to_pixel (start);
4735                 double x2 = _editor->sample_to_pixel (end);
4736                 const double min_dimension = 2.0;
4737
4738                 if (_vertical_only) {
4739                         /* fixed 10 pixel width */
4740                         x2 = x1 + 10;
4741                 } else {
4742                         if (x2 < x1) {
4743                                 x2 = min (x1 - min_dimension, x2);
4744                         } else {
4745                                 x2 = max (x1 + min_dimension, x2);
4746                         }
4747                 }
4748
4749                 if (y2 < y1) {
4750                         y2 = min (y1 - min_dimension, y2);
4751                 } else {
4752                         y2 = max (y1 + min_dimension, y2);
4753                 }
4754
4755                 /* translate rect into item space and set */
4756
4757                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4758
4759                 /* this drag is a _trackview_only == true drag, so the y1 and
4760                  * y2 (computed using current_pointer_y() and grab_y()) will be
4761                  * relative to the top of the trackview group). The
4762                  * rubberband rect has the same parent/scroll offset as the
4763                  * the trackview group, so we can use the "r" rect directly
4764                  * to set the shape of the rubberband.
4765                  */
4766
4767                 _editor->rubberband_rect->set (r);
4768                 _editor->rubberband_rect->show();
4769                 _editor->rubberband_rect->raise_to_top();
4770
4771                 show_verbose_cursor_time (pf);
4772
4773                 do_select_things (event, true);
4774         }
4775 }
4776
4777 void
4778 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4779 {
4780         framepos_t x1;
4781         framepos_t x2;
4782         framepos_t grab = grab_frame ();
4783         framepos_t lpf = last_pointer_frame ();
4784
4785         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4786                 grab = raw_grab_frame ();
4787                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4788         }
4789
4790         if (grab < lpf) {
4791                 x1 = grab;
4792                 x2 = lpf;
4793         } else {
4794                 x2 = grab;
4795                 x1 = lpf;
4796         }
4797
4798         double y1;
4799         double y2;
4800
4801         if (current_pointer_y() < grab_y()) {
4802                 y1 = current_pointer_y();
4803                 y2 = grab_y();
4804         } else {
4805                 y2 = current_pointer_y();
4806                 y1 = grab_y();
4807         }
4808
4809         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4810 }
4811
4812 void
4813 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4814 {
4815         if (movement_occurred) {
4816
4817                 motion (event, false);
4818                 do_select_things (event, false);
4819
4820         } else {
4821
4822                 /* just a click */
4823
4824                 bool do_deselect = true;
4825                 MidiTimeAxisView* mtv;
4826
4827                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4828                         /* MIDI track */
4829                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4830                                 /* nothing selected */
4831                                 add_midi_region (mtv, true);
4832                                 do_deselect = false;
4833                         }
4834                 }
4835
4836                 /* do not deselect if Primary or Tertiary (toggle-select or
4837                  * extend-select are pressed.
4838                  */
4839
4840                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4841                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4842                     do_deselect) {
4843                         deselect_things ();
4844                 }
4845
4846         }
4847
4848         _editor->rubberband_rect->hide();
4849 }
4850
4851 void
4852 RubberbandSelectDrag::aborted (bool)
4853 {
4854         _editor->rubberband_rect->hide ();
4855 }
4856
4857 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4858         : RegionDrag (e, i, p, v)
4859 {
4860         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4861 }
4862
4863 void
4864 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4865 {
4866         Drag::start_grab (event, cursor);
4867
4868         _editor->get_selection().add (_primary);
4869
4870         framepos_t where = _primary->region()->position();
4871         setup_snap_delta (where);
4872
4873         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4874 }
4875
4876 void
4877 TimeFXDrag::motion (GdkEvent* event, bool)
4878 {
4879         RegionView* rv = _primary;
4880         StreamView* cv = rv->get_time_axis_view().view ();
4881
4882         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4883         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4884         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4885         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4886         _editor->snap_to_with_modifier (pf, event);
4887         pf -= snap_delta (event->button.state);
4888
4889         if (pf > rv->region()->position()) {
4890                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4891         }
4892
4893         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4894 }
4895
4896 void
4897 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4898 {
4899         /* this may have been a single click, no drag. We still want the dialog
4900            to show up in that case, so that the user can manually edit the
4901            parameters for the timestretch.
4902         */
4903
4904         float fraction = 1.0;
4905
4906         if (movement_occurred) {
4907
4908                 motion (event, false);
4909
4910                 _primary->get_time_axis_view().hide_timestretch ();
4911
4912                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4913
4914                 if (adjusted_frame_pos < _primary->region()->position()) {
4915                         /* backwards drag of the left edge - not usable */
4916                         return;
4917                 }
4918
4919                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4920
4921                 fraction = (double) newlen / (double) _primary->region()->length();
4922
4923 #ifndef USE_RUBBERBAND
4924                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4925                 if (_primary->region()->data_type() == DataType::AUDIO) {
4926                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4927                 }
4928 #endif
4929         }
4930
4931         if (!_editor->get_selection().regions.empty()) {
4932                 /* primary will already be included in the selection, and edit
4933                    group shared editing will propagate selection across
4934                    equivalent regions, so just use the current region
4935                    selection.
4936                 */
4937
4938                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4939                         error << _("An error occurred while executing time stretch operation") << endmsg;
4940                 }
4941         }
4942 }
4943
4944 void
4945 TimeFXDrag::aborted (bool)
4946 {
4947         _primary->get_time_axis_view().hide_timestretch ();
4948 }
4949
4950 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4951         : Drag (e, i)
4952 {
4953         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4954 }
4955
4956 void
4957 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4958 {
4959         Drag::start_grab (event);
4960 }
4961
4962 void
4963 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4964 {
4965         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4966 }
4967
4968 void
4969 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4970 {
4971         if (movement_occurred && _editor->session()) {
4972                 /* make sure we stop */
4973                 _editor->session()->request_transport_speed (0.0);
4974         }
4975 }
4976
4977 void
4978 ScrubDrag::aborted (bool)
4979 {
4980         /* XXX: TODO */
4981 }
4982
4983 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4984         : Drag (e, i)
4985         , _operation (o)
4986         , _add (false)
4987         , _time_selection_at_start (!_editor->get_selection().time.empty())
4988 {
4989         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4990
4991         if (_time_selection_at_start) {
4992                 start_at_start = _editor->get_selection().time.start();
4993                 end_at_start = _editor->get_selection().time.end_frame();
4994         }
4995 }
4996
4997 void
4998 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4999 {
5000         if (_editor->session() == 0) {
5001                 return;
5002         }
5003
5004         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5005
5006         switch (_operation) {
5007         case CreateSelection:
5008                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5009                         _add = true;
5010                 } else {
5011                         _add = false;
5012                 }
5013                 cursor = _editor->cursors()->selector;
5014                 Drag::start_grab (event, cursor);
5015                 break;
5016
5017         case SelectionStartTrim:
5018                 if (_editor->clicked_axisview) {
5019                         _editor->clicked_axisview->order_selection_trims (_item, true);
5020                 }
5021                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
5022                 break;
5023
5024         case SelectionEndTrim:
5025                 if (_editor->clicked_axisview) {
5026                         _editor->clicked_axisview->order_selection_trims (_item, false);
5027                 }
5028                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
5029                 break;
5030
5031         case SelectionMove:
5032                 Drag::start_grab (event, cursor);
5033                 break;
5034
5035         case SelectionExtend:
5036                 Drag::start_grab (event, cursor);
5037                 break;
5038         }
5039
5040         if (_operation == SelectionMove) {
5041                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
5042         } else {
5043                 show_verbose_cursor_time (adjusted_current_frame (event));
5044         }
5045 }
5046
5047 void
5048 SelectionDrag::setup_pointer_frame_offset ()
5049 {
5050         switch (_operation) {
5051         case CreateSelection:
5052                 _pointer_frame_offset = 0;
5053                 break;
5054
5055         case SelectionStartTrim:
5056         case SelectionMove:
5057                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5058                 break;
5059
5060         case SelectionEndTrim:
5061                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5062                 break;
5063
5064         case SelectionExtend:
5065                 break;
5066         }
5067 }
5068
5069 void
5070 SelectionDrag::motion (GdkEvent* event, bool first_move)
5071 {
5072         framepos_t start = 0;
5073         framepos_t end = 0;
5074         framecnt_t length = 0;
5075         framecnt_t distance = 0;
5076
5077         framepos_t const pending_position = adjusted_current_frame (event);
5078
5079         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5080                 return;
5081         }
5082
5083         switch (_operation) {
5084         case CreateSelection:
5085         {
5086                 framepos_t grab = grab_frame ();
5087
5088                 if (first_move) {
5089                         grab = adjusted_current_frame (event, false);
5090                         if (grab < pending_position) {
5091                                 _editor->snap_to (grab, RoundDownMaybe);
5092                         }  else {
5093                                 _editor->snap_to (grab, RoundUpMaybe);
5094                         }
5095                 }
5096
5097                 if (pending_position < grab) {
5098                         start = pending_position;
5099                         end = grab;
5100                 } else {
5101                         end = pending_position;
5102                         start = grab;
5103                 }
5104
5105                 /* first drag: Either add to the selection
5106                    or create a new selection
5107                 */
5108
5109                 if (first_move) {
5110
5111                         if (_add) {
5112
5113                                 /* adding to the selection */
5114                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5115                                 _editor->clicked_selection = _editor->selection->add (start, end);
5116                                 _add = false;
5117
5118                         } else {
5119
5120                                 /* new selection */
5121
5122                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5123                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5124                                 }
5125
5126                                 _editor->clicked_selection = _editor->selection->set (start, end);
5127                         }
5128                 }
5129
5130                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5131                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5132                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5133                 if (atest) {
5134                         _editor->selection->add (atest);
5135                         break;
5136                 }
5137
5138                 /* select all tracks within the rectangle that we've marked out so far */
5139                 TrackViewList new_selection;
5140                 TrackViewList& all_tracks (_editor->track_views);
5141
5142                 ArdourCanvas::Coord const top = grab_y();
5143                 ArdourCanvas::Coord const bottom = current_pointer_y();
5144
5145                 if (top >= 0 && bottom >= 0) {
5146
5147                         //first, find the tracks that are covered in the y range selection
5148                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5149                                 if ((*i)->covered_by_y_range (top, bottom)) {
5150                                         new_selection.push_back (*i);
5151                                 }
5152                         }
5153
5154                         //now find any tracks that are GROUPED with the tracks we selected
5155                         TrackViewList grouped_add = new_selection;
5156                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5157                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5158                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5159                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5160                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5161                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5162                                                         grouped_add.push_back (*j);
5163                                         }
5164                                 }
5165                         }
5166
5167                         //now compare our list with the current selection, and add or remove as necessary
5168                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5169                         TrackViewList tracks_to_add;
5170                         TrackViewList tracks_to_remove;
5171                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5172                                 if ( !_editor->selection->tracks.contains ( *i ) )
5173                                         tracks_to_add.push_back ( *i );
5174                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5175                                 if ( !grouped_add.contains ( *i ) )
5176                                         tracks_to_remove.push_back ( *i );
5177                         _editor->selection->add(tracks_to_add);
5178                         _editor->selection->remove(tracks_to_remove);
5179
5180                 }
5181         }
5182         break;
5183
5184         case SelectionStartTrim:
5185
5186                 end = _editor->selection->time[_editor->clicked_selection].end;
5187
5188                 if (pending_position > end) {
5189                         start = end;
5190                 } else {
5191                         start = pending_position;
5192                 }
5193                 break;
5194
5195         case SelectionEndTrim:
5196
5197                 start = _editor->selection->time[_editor->clicked_selection].start;
5198
5199                 if (pending_position < start) {
5200                         end = start;
5201                 } else {
5202                         end = pending_position;
5203                 }
5204
5205                 break;
5206
5207         case SelectionMove:
5208
5209                 start = _editor->selection->time[_editor->clicked_selection].start;
5210                 end = _editor->selection->time[_editor->clicked_selection].end;
5211
5212                 length = end - start;
5213                 distance = pending_position - start;
5214                 start = pending_position;
5215                 _editor->snap_to (start);
5216
5217                 end = start + length;
5218
5219                 break;
5220
5221         case SelectionExtend:
5222                 break;
5223         }
5224
5225         if (start != end) {
5226                 switch (_operation) {
5227                 case SelectionMove:
5228                         if (_time_selection_at_start) {
5229                                 _editor->selection->move_time (distance);
5230                         }
5231                         break;
5232                 default:
5233                         _editor->selection->replace (_editor->clicked_selection, start, end);
5234                 }
5235         }
5236
5237         if (_operation == SelectionMove) {
5238                 show_verbose_cursor_time(start);
5239         } else {
5240                 show_verbose_cursor_time(pending_position);
5241         }
5242 }
5243
5244 void
5245 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5246 {
5247         Session* s = _editor->session();
5248
5249         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5250         if (movement_occurred) {
5251                 motion (event, false);
5252                 /* XXX this is not object-oriented programming at all. ick */
5253                 if (_editor->selection->time.consolidate()) {
5254                         _editor->selection->TimeChanged ();
5255                 }
5256
5257                 /* XXX what if its a music time selection? */
5258                 if (s) {
5259                         if (s->get_play_range() && s->transport_rolling()) {
5260                                 s->request_play_range (&_editor->selection->time, true);
5261                         } else if (!s->config.get_external_sync()) {
5262                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5263                                         if (_operation == SelectionEndTrim)
5264                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5265                                         else
5266                                                 s->request_locate (_editor->get_selection().time.start());
5267                                 }
5268                         }
5269
5270                         if (_editor->get_selection().time.length() != 0) {
5271                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5272                         } else {
5273                                 s->clear_range_selection ();
5274                         }
5275                 }
5276
5277         } else {
5278                 /* just a click, no pointer movement.
5279                  */
5280
5281                 if (_operation == SelectionExtend) {
5282                         if (_time_selection_at_start) {
5283                                 framepos_t pos = adjusted_current_frame (event, false);
5284                                 framepos_t start = min (pos, start_at_start);
5285                                 framepos_t end = max (pos, end_at_start);
5286                                 _editor->selection->set (start, end);
5287                         }
5288                 } else {
5289                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5290                                 if (_editor->clicked_selection) {
5291                                         _editor->selection->remove (_editor->clicked_selection);
5292                                 }
5293                         } else {
5294                                 if (!_editor->clicked_selection) {
5295                                         _editor->selection->clear_time();
5296                                 }
5297                         }
5298                 }
5299
5300                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5301                         _editor->selection->set (_editor->clicked_axisview);
5302                 }
5303
5304                 if (s && s->get_play_range () && s->transport_rolling()) {
5305                         s->request_stop (false, false);
5306                 }
5307
5308         }
5309
5310         _editor->stop_canvas_autoscroll ();
5311         _editor->clicked_selection = 0;
5312         _editor->commit_reversible_selection_op ();
5313 }
5314
5315 void
5316 SelectionDrag::aborted (bool)
5317 {
5318         /* XXX: TODO */
5319 }
5320
5321 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5322         : Drag (e, i, false),
5323           _operation (o),
5324           _copy (false)
5325 {
5326         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5327
5328         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5329                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5330                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5331         _drag_rect->hide ();
5332
5333         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5334         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5335 }
5336
5337 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5338 {
5339         /* normal canvas items will be cleaned up when their parent group is deleted. But
5340            this item is created as the child of a long-lived parent group, and so we
5341            need to explicitly delete it.
5342         */
5343         delete _drag_rect;
5344 }
5345
5346 void
5347 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5348 {
5349         if (_editor->session() == 0) {
5350                 return;
5351         }
5352
5353         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5354
5355         if (!_editor->temp_location) {
5356                 _editor->temp_location = new Location (*_editor->session());
5357         }
5358
5359         switch (_operation) {
5360         case CreateSkipMarker:
5361         case CreateRangeMarker:
5362         case CreateTransportMarker:
5363         case CreateCDMarker:
5364
5365                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5366                         _copy = true;
5367                 } else {
5368                         _copy = false;
5369                 }
5370                 cursor = _editor->cursors()->selector;
5371                 break;
5372         }
5373
5374         Drag::start_grab (event, cursor);
5375
5376         show_verbose_cursor_time (adjusted_current_frame (event));
5377 }
5378
5379 void
5380 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5381 {
5382         framepos_t start = 0;
5383         framepos_t end = 0;
5384         ArdourCanvas::Rectangle *crect;
5385
5386         switch (_operation) {
5387         case CreateSkipMarker:
5388                 crect = _editor->range_bar_drag_rect;
5389                 break;
5390         case CreateRangeMarker:
5391                 crect = _editor->range_bar_drag_rect;
5392                 break;
5393         case CreateTransportMarker:
5394                 crect = _editor->transport_bar_drag_rect;
5395                 break;
5396         case CreateCDMarker:
5397                 crect = _editor->cd_marker_bar_drag_rect;
5398                 break;
5399         default:
5400                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5401                 return;
5402                 break;
5403         }
5404
5405         framepos_t const pf = adjusted_current_frame (event);
5406
5407         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5408                 framepos_t grab = grab_frame ();
5409                 _editor->snap_to (grab);
5410
5411                 if (pf < grab_frame()) {
5412                         start = pf;
5413                         end = grab;
5414                 } else {
5415                         end = pf;
5416                         start = grab;
5417                 }
5418
5419                 /* first drag: Either add to the selection
5420                    or create a new selection.
5421                 */
5422
5423                 if (first_move) {
5424
5425                         _editor->temp_location->set (start, end);
5426
5427                         crect->show ();
5428
5429                         update_item (_editor->temp_location);
5430                         _drag_rect->show();
5431                         //_drag_rect->raise_to_top();
5432
5433                 }
5434         }
5435
5436         if (start != end) {
5437                 _editor->temp_location->set (start, end);
5438
5439                 double x1 = _editor->sample_to_pixel (start);
5440                 double x2 = _editor->sample_to_pixel (end);
5441                 crect->set_x0 (x1);
5442                 crect->set_x1 (x2);
5443
5444                 update_item (_editor->temp_location);
5445         }
5446
5447         show_verbose_cursor_time (pf);
5448
5449 }
5450
5451 void
5452 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5453 {
5454         Location * newloc = 0;
5455         string rangename;
5456         int flags;
5457
5458         if (movement_occurred) {
5459                 motion (event, false);
5460                 _drag_rect->hide();
5461
5462                 switch (_operation) {
5463                 case CreateSkipMarker:
5464                 case CreateRangeMarker:
5465                 case CreateCDMarker:
5466                     {
5467                         XMLNode &before = _editor->session()->locations()->get_state();
5468                         if (_operation == CreateSkipMarker) {
5469                                 _editor->begin_reversible_command (_("new skip marker"));
5470                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5471                                 flags = Location::IsRangeMarker | Location::IsSkip;
5472                                 _editor->range_bar_drag_rect->hide();
5473                         } else if (_operation == CreateCDMarker) {
5474                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5475                                 _editor->begin_reversible_command (_("new CD marker"));
5476                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5477                                 _editor->cd_marker_bar_drag_rect->hide();
5478                         } else {
5479                                 _editor->begin_reversible_command (_("new skip marker"));
5480                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5481                                 flags = Location::IsRangeMarker;
5482                                 _editor->range_bar_drag_rect->hide();
5483                         }
5484                         newloc = new Location (
5485                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5486                                 );
5487
5488                         _editor->session()->locations()->add (newloc, true);
5489                         XMLNode &after = _editor->session()->locations()->get_state();
5490                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5491                         _editor->commit_reversible_command ();
5492                         break;
5493                     }
5494
5495                 case CreateTransportMarker:
5496                         // popup menu to pick loop or punch
5497                         _editor->new_transport_marker_context_menu (&event->button, _item);
5498                         break;
5499                 }
5500
5501         } else {
5502
5503                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5504
5505                 if (_operation == CreateTransportMarker) {
5506
5507                         /* didn't drag, so just locate */
5508
5509                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5510
5511                 } else if (_operation == CreateCDMarker) {
5512
5513                         /* didn't drag, but mark is already created so do
5514                          * nothing */
5515
5516                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5517
5518                         framepos_t start;
5519                         framepos_t end;
5520
5521                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5522
5523                         if (end == max_framepos) {
5524                                 end = _editor->session()->current_end_frame ();
5525                         }
5526
5527                         if (start == max_framepos) {
5528                                 start = _editor->session()->current_start_frame ();
5529                         }
5530
5531                         switch (_editor->mouse_mode) {
5532                         case MouseObject:
5533                                 /* find the two markers on either side and then make the selection from it */
5534                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5535                                 break;
5536
5537                         case MouseRange:
5538                                 /* find the two markers on either side of the click and make the range out of it */
5539                                 _editor->selection->set (start, end);
5540                                 break;
5541
5542                         default:
5543                                 break;
5544                         }
5545                 }
5546         }
5547
5548         _editor->stop_canvas_autoscroll ();
5549 }
5550
5551 void
5552 RangeMarkerBarDrag::aborted (bool movement_occurred)
5553 {
5554         if (movement_occurred) {
5555                 _drag_rect->hide ();
5556         }
5557 }
5558
5559 void
5560 RangeMarkerBarDrag::update_item (Location* location)
5561 {
5562         double const x1 = _editor->sample_to_pixel (location->start());
5563         double const x2 = _editor->sample_to_pixel (location->end());
5564
5565         _drag_rect->set_x0 (x1);
5566         _drag_rect->set_x1 (x2);
5567 }
5568
5569 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5570         : Drag (e, i)
5571         , _cumulative_dx (0)
5572         , _cumulative_dy (0)
5573         , _was_selected (false)
5574 {
5575         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5576
5577         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5578         assert (_primary);
5579         _region = &_primary->region_view ();
5580         _note_height = _region->midi_stream_view()->note_height ();
5581 }
5582
5583 void
5584 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5585 {
5586         Drag::start_grab (event);
5587         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5588
5589         if (!(_was_selected = _primary->selected())) {
5590
5591                 /* tertiary-click means extend selection - we'll do that on button release,
5592                    so don't add it here, because otherwise we make it hard to figure
5593                    out the "extend-to" range.
5594                 */
5595
5596                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5597
5598                 if (!extend) {
5599                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5600
5601                         if (add) {
5602                                 _region->note_selected (_primary, true);
5603                         } else {
5604                                 _editor->get_selection().clear_points();
5605                                 _region->unique_select (_primary);
5606                         }
5607                 }
5608         }
5609 }
5610
5611 /** @return Current total drag x change in frames */
5612 frameoffset_t
5613 NoteDrag::total_dx (const guint state) const
5614 {
5615         /* dx in frames */
5616         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5617
5618         /* primary note time */
5619         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5620
5621         /* new time of the primary note in session frames */
5622         frameoffset_t st = n + dx + snap_delta (state);
5623
5624         framepos_t const rp = _region->region()->position ();
5625
5626         /* prevent the note being dragged earlier than the region's position */
5627         st = max (st, rp);
5628
5629         /* possibly snap and return corresponding delta */
5630
5631         bool snap = true;
5632
5633         if (ArdourKeyboard::indicates_snap (state)) {
5634                 if (_editor->snap_mode () != SnapOff) {
5635                         snap = false;
5636                 }
5637         } else {
5638                 if (_editor->snap_mode () == SnapOff) {
5639                         snap = false;
5640                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5641                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5642                                 snap = true;
5643                         }
5644                 }
5645         }
5646
5647         frameoffset_t ret;
5648         if (snap) {
5649                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5650                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5651         } else {
5652                 ret = st - n - snap_delta (state);
5653         }
5654         return ret;
5655 }
5656
5657 /** @return Current total drag y change in note number */
5658 int8_t
5659 NoteDrag::total_dy () const
5660 {
5661         MidiStreamView* msv = _region->midi_stream_view ();
5662         double const y = _region->midi_view()->y_position ();
5663         /* new current note */
5664         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5665         /* clamp */
5666         n = max (msv->lowest_note(), n);
5667         n = min (msv->highest_note(), n);
5668         /* and work out delta */
5669         return n - msv->y_to_note (grab_y() - y);
5670 }
5671
5672 void
5673 NoteDrag::motion (GdkEvent * event, bool)
5674 {
5675         /* Total change in x and y since the start of the drag */
5676         frameoffset_t const dx = total_dx (event->button.state);
5677         int8_t const dy = total_dy ();
5678
5679         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5680         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5681         double const tdy = -dy * _note_height - _cumulative_dy;
5682
5683         if (tdx || tdy) {
5684                 _cumulative_dx += tdx;
5685                 _cumulative_dy += tdy;
5686
5687                 int8_t note_delta = total_dy();
5688
5689                 _region->move_selection (tdx, tdy, note_delta);
5690
5691                 /* the new note value may be the same as the old one, but we
5692                  * don't know what that means because the selection may have
5693                  * involved more than one note and we might be doing something
5694                  * odd with them. so show the note value anyway, always.
5695                  */
5696
5697                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5698
5699                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5700         }
5701 }
5702
5703 void
5704 NoteDrag::finished (GdkEvent* ev, bool moved)
5705 {
5706         if (!moved) {
5707                 /* no motion - select note */
5708
5709                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5710                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5711
5712                         bool changed = false;
5713
5714                         if (_was_selected) {
5715                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5716                                 if (add) {
5717                                         _region->note_deselected (_primary);
5718                                         changed = true;
5719                                 } else {
5720                                         _editor->get_selection().clear_points();
5721                                         _region->unique_select (_primary);
5722                                         changed = true;
5723                                 }
5724                         } else {
5725                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5726                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5727
5728                                 if (!extend && !add && _region->selection_size() > 1) {
5729                                         _editor->get_selection().clear_points();
5730                                         _region->unique_select (_primary);
5731                                         changed = true;
5732                                 } else if (extend) {
5733                                         _region->note_selected (_primary, true, true);
5734                                         changed = true;
5735                                 } else {
5736                                         /* it was added during button press */
5737                                         changed = true;
5738
5739                                 }
5740                         }
5741
5742                         if (changed) {
5743                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5744                                 _editor->commit_reversible_selection_op();
5745                         }
5746                 }
5747         } else {
5748                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5749         }
5750 }
5751
5752 void
5753 NoteDrag::aborted (bool)
5754 {
5755         /* XXX: TODO */
5756 }
5757
5758 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5759 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5760         : Drag (editor, atv->base_item ())
5761         , _ranges (r)
5762         , _y_origin (atv->y_position())
5763         , _nothing_to_drag (false)
5764 {
5765         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5766         setup (atv->lines ());
5767 }
5768
5769 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5770 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5771         : Drag (editor, rv->get_canvas_group ())
5772         , _ranges (r)
5773         , _y_origin (rv->get_time_axis_view().y_position())
5774         , _nothing_to_drag (false)
5775         , _integral (false)
5776 {
5777         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5778
5779         list<boost::shared_ptr<AutomationLine> > lines;
5780
5781         AudioRegionView*      audio_view;
5782         AutomationRegionView* automation_view;
5783         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5784                 lines.push_back (audio_view->get_gain_line ());
5785         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5786                 lines.push_back (automation_view->line ());
5787                 _integral = true;
5788         } else {
5789                 error << _("Automation range drag created for invalid region type") << endmsg;
5790         }
5791
5792         setup (lines);
5793 }
5794
5795 /** @param lines AutomationLines to drag.
5796  *  @param offset Offset from the session start to the points in the AutomationLines.
5797  */
5798 void
5799 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5800 {
5801         /* find the lines that overlap the ranges being dragged */
5802         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5803         while (i != lines.end ()) {
5804                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5805                 ++j;
5806
5807                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5808
5809                 /* check this range against all the AudioRanges that we are using */
5810                 list<AudioRange>::const_iterator k = _ranges.begin ();
5811                 while (k != _ranges.end()) {
5812                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5813                                 break;
5814                         }
5815                         ++k;
5816                 }
5817
5818                 /* add it to our list if it overlaps at all */
5819                 if (k != _ranges.end()) {
5820                         Line n;
5821                         n.line = *i;
5822                         n.state = 0;
5823                         n.range = r;
5824                         _lines.push_back (n);
5825                 }
5826
5827                 i = j;
5828         }
5829
5830         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5831 }
5832
5833 double
5834 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5835 {
5836         return 1.0 - ((global_y - _y_origin) / line->height());
5837 }
5838
5839 double
5840 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5841 {
5842         const double v = list->eval(x);
5843         return _integral ? rint(v) : v;
5844 }
5845
5846 void
5847 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5848 {
5849         Drag::start_grab (event, cursor);
5850
5851         /* Get line states before we start changing things */
5852         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5853                 i->state = &i->line->get_state ();
5854                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5855         }
5856
5857         if (_ranges.empty()) {
5858
5859                 /* No selected time ranges: drag all points */
5860                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5861                         uint32_t const N = i->line->npoints ();
5862                         for (uint32_t j = 0; j < N; ++j) {
5863                                 i->points.push_back (i->line->nth (j));
5864                         }
5865                 }
5866
5867         }
5868
5869         if (_nothing_to_drag) {
5870                 return;
5871         }
5872 }
5873
5874 void
5875 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5876 {
5877         if (_nothing_to_drag && !first_move) {
5878                 return;
5879         }
5880
5881         if (first_move) {
5882                 _editor->begin_reversible_command (_("automation range move"));
5883
5884                 if (!_ranges.empty()) {
5885
5886                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5887
5888                                 framecnt_t const half = (i->start + i->end) / 2;
5889
5890                                 /* find the line that this audio range starts in */
5891                                 list<Line>::iterator j = _lines.begin();
5892                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5893                                         ++j;
5894                                 }
5895
5896                                 if (j != _lines.end()) {
5897                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5898
5899                                 /* j is the line that this audio range starts in; fade into it;
5900                                    64 samples length plucked out of thin air.
5901                                 */
5902
5903                                         framepos_t a = i->start + 64;
5904                                         if (a > half) {
5905                                                 a = half;
5906                                         }
5907
5908                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5909                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5910
5911                                         XMLNode &before = the_list->get_state();
5912                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5913                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5914
5915                                         if (add_p || add_q) {
5916                                                 _editor->session()->add_command (
5917                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5918                                         }
5919                                 }
5920
5921                                 /* same thing for the end */
5922
5923                                 j = _lines.begin();
5924                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5925                                         ++j;
5926                                 }
5927
5928                                 if (j != _lines.end()) {
5929                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5930
5931                                         /* j is the line that this audio range starts in; fade out of it;
5932                                            64 samples length plucked out of thin air.
5933                                         */
5934
5935                                         framepos_t b = i->end - 64;
5936                                         if (b < half) {
5937                                                 b = half;
5938                                         }
5939
5940                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5941                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5942
5943                                         XMLNode &before = the_list->get_state();
5944                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5945                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5946
5947                                         if (add_p || add_q) {
5948                                                 _editor->session()->add_command (
5949                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5950                                         }
5951                                 }
5952                         }
5953
5954                         _nothing_to_drag = true;
5955
5956                         /* Find all the points that should be dragged and put them in the relevant
5957                            points lists in the Line structs.
5958                         */
5959
5960                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5961
5962                                 uint32_t const N = i->line->npoints ();
5963                                 for (uint32_t j = 0; j < N; ++j) {
5964
5965                                         /* here's a control point on this line */
5966                                         ControlPoint* p = i->line->nth (j);
5967                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5968
5969                                         /* see if it's inside a range */
5970                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5971                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5972                                                 ++k;
5973                                         }
5974
5975                                         if (k != _ranges.end()) {
5976                                                 /* dragging this point */
5977                                                 _nothing_to_drag = false;
5978                                                 i->points.push_back (p);
5979                                         }
5980                                 }
5981                         }
5982                 }
5983
5984                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5985                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5986                 }
5987         }
5988
5989         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5990                 float const f = y_fraction (l->line, current_pointer_y());
5991                 /* we are ignoring x position for this drag, so we can just pass in anything */
5992                 pair<double, float> result;
5993                 uint32_t ignored;
5994                 result = l->line->drag_motion (0, f, true, false, ignored);
5995                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5996         }
5997 }
5998
5999 void
6000 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
6001 {
6002         if (_nothing_to_drag || !motion_occurred) {
6003                 return;
6004         }
6005
6006         motion (event, false);
6007         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6008                 i->line->end_drag (false, 0);
6009         }
6010
6011         _editor->commit_reversible_command ();
6012 }
6013
6014 void
6015 AutomationRangeDrag::aborted (bool)
6016 {
6017         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6018                 i->line->reset ();
6019         }
6020 }
6021
6022 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
6023         : view (v)
6024         , initial_time_axis_view (itav)
6025 {
6026         /* note that time_axis_view may be null if the regionview was created
6027          * as part of a copy operation.
6028          */
6029         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
6030         layer = v->region()->layer ();
6031         initial_y = v->get_canvas_group()->position().y;
6032         initial_playlist = v->region()->playlist ();
6033         initial_position = v->region()->position ();
6034         initial_end = v->region()->position () + v->region()->length ();
6035 }
6036
6037 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
6038         : Drag (e, i->canvas_item ())
6039         , _region_view (r)
6040         , _patch_change (i)
6041         , _cumulative_dx (0)
6042 {
6043         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
6044                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
6045                                                    grab_frame()));
6046 }
6047
6048 void
6049 PatchChangeDrag::motion (GdkEvent* ev, bool)
6050 {
6051         framepos_t f = adjusted_current_frame (ev);
6052         boost::shared_ptr<Region> r = _region_view->region ();
6053         f = max (f, r->position ());
6054         f = min (f, r->last_frame ());
6055
6056         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6057         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6058         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6059         _cumulative_dx = dxu;
6060 }
6061
6062 void
6063 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6064 {
6065         if (!movement_occurred) {
6066                 return;
6067         }
6068
6069         boost::shared_ptr<Region> r (_region_view->region ());
6070         framepos_t f = adjusted_current_frame (ev);
6071         f = max (f, r->position ());
6072         f = min (f, r->last_frame ());
6073
6074         _region_view->move_patch_change (
6075                 *_patch_change,
6076                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6077                 );
6078 }
6079
6080 void
6081 PatchChangeDrag::aborted (bool)
6082 {
6083         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6084 }
6085
6086 void
6087 PatchChangeDrag::setup_pointer_frame_offset ()
6088 {
6089         boost::shared_ptr<Region> region = _region_view->region ();
6090         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6091 }
6092
6093 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6094         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6095         , _region_view (rv)
6096 {
6097
6098 }
6099
6100 void
6101 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6102 {
6103         _region_view->update_drag_selection (
6104                 x1, x2, y1, y2,
6105                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6106 }
6107
6108 void
6109 MidiRubberbandSelectDrag::deselect_things ()
6110 {
6111         /* XXX */
6112 }
6113
6114 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6115         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6116         , _region_view (rv)
6117 {
6118         _vertical_only = true;
6119 }
6120
6121 void
6122 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6123 {
6124         double const y = _region_view->midi_view()->y_position ();
6125
6126         y1 = max (0.0, y1 - y);
6127         y2 = max (0.0, y2 - y);
6128
6129         _region_view->update_vertical_drag_selection (
6130                 y1,
6131                 y2,
6132                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6133                 );
6134 }
6135
6136 void
6137 MidiVerticalSelectDrag::deselect_things ()
6138 {
6139         /* XXX */
6140 }
6141
6142 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6143         : RubberbandSelectDrag (e, i)
6144 {
6145
6146 }
6147
6148 void
6149 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6150 {
6151         if (drag_in_progress) {
6152                 /* We just want to select things at the end of the drag, not during it */
6153                 return;
6154         }
6155
6156         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6157
6158         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6159
6160         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6161
6162         _editor->commit_reversible_selection_op ();
6163 }
6164
6165 void
6166 EditorRubberbandSelectDrag::deselect_things ()
6167 {
6168         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6169
6170         _editor->selection->clear_tracks();
6171         _editor->selection->clear_regions();
6172         _editor->selection->clear_points ();
6173         _editor->selection->clear_lines ();
6174         _editor->selection->clear_midi_notes ();
6175
6176         _editor->commit_reversible_selection_op();
6177 }
6178
6179 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6180         : Drag (e, i)
6181         , _region_view (rv)
6182         , _drag_rect (0)
6183 {
6184         _note[0] = _note[1] = 0;
6185 }
6186
6187 NoteCreateDrag::~NoteCreateDrag ()
6188 {
6189         delete _drag_rect;
6190 }
6191
6192 framecnt_t
6193 NoteCreateDrag::grid_frames (framepos_t t) const
6194 {
6195         bool success;
6196         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6197         if (!success) {
6198                 grid_beats = Evoral::Beats(1);
6199         }
6200
6201         return _region_view->region_beats_to_region_frames (grid_beats);
6202 }
6203
6204 void
6205 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6206 {
6207         Drag::start_grab (event, cursor);
6208
6209         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6210
6211         framepos_t pf = _drags->current_pointer_frame ();
6212         framecnt_t const g = grid_frames (pf);
6213
6214         /* Hack so that we always snap to the note that we are over, instead of snapping
6215            to the next one if we're more than halfway through the one we're over.
6216         */
6217         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6218                 pf -= g / 2;
6219         }
6220
6221         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6222         _note[1] = _note[0];
6223
6224         MidiStreamView* sv = _region_view->midi_stream_view ();
6225         double const x = _editor->sample_to_pixel (_note[0]);
6226         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6227
6228         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6229         _drag_rect->set_outline_all ();
6230         _drag_rect->set_outline_color (0xffffff99);
6231         _drag_rect->set_fill_color (0xffffff66);
6232 }
6233
6234 void
6235 NoteCreateDrag::motion (GdkEvent* event, bool)
6236 {
6237         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6238         double const x0 = _editor->sample_to_pixel (_note[0]);
6239         double const x1 = _editor->sample_to_pixel (_note[1]);
6240         _drag_rect->set_x0 (std::min(x0, x1));
6241         _drag_rect->set_x1 (std::max(x0, x1));
6242 }
6243
6244 void
6245 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6246 {
6247         if (!had_movement) {
6248                 return;
6249         }
6250
6251         framepos_t const start = min (_note[0], _note[1]);
6252         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6253
6254         framecnt_t const g = grid_frames (start);
6255         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6256
6257         if (_editor->snap_mode() == SnapNormal && length < g) {
6258                 length = g;
6259         }
6260
6261         Evoral::Beats length_beats = max (
6262                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6263
6264         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6265 }
6266
6267 double
6268 NoteCreateDrag::y_to_region (double y) const
6269 {
6270         double x = 0;
6271         _region_view->get_canvas_group()->canvas_to_item (x, y);
6272         return y;
6273 }
6274
6275 void
6276 NoteCreateDrag::aborted (bool)
6277 {
6278
6279 }
6280
6281 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6282         : Drag (e, i)
6283         , arv (rv)
6284         , start (start_yn)
6285 {
6286         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6287 }
6288
6289 void
6290 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6291 {
6292         Drag::start_grab (event, cursor);
6293 }
6294
6295 void
6296 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6297 {
6298         double distance;
6299         double new_length;
6300         framecnt_t len;
6301
6302         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6303
6304         if (start) {
6305                 distance = _drags->current_pointer_x() - grab_x();
6306                 len = ar->fade_in()->back()->when;
6307         } else {
6308                 distance = grab_x() - _drags->current_pointer_x();
6309                 len = ar->fade_out()->back()->when;
6310         }
6311
6312         /* how long should it be ? */
6313
6314         new_length = len + _editor->pixel_to_sample (distance);
6315
6316         /* now check with the region that this is legal */
6317
6318         new_length = ar->verify_xfade_bounds (new_length, start);
6319
6320         if (start) {
6321                 arv->reset_fade_in_shape_width (ar, new_length);
6322         } else {
6323                 arv->reset_fade_out_shape_width (ar, new_length);
6324         }
6325 }
6326
6327 void
6328 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6329 {
6330         double distance;
6331         double new_length;
6332         framecnt_t len;
6333
6334         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6335
6336         if (start) {
6337                 distance = _drags->current_pointer_x() - grab_x();
6338                 len = ar->fade_in()->back()->when;
6339         } else {
6340                 distance = grab_x() - _drags->current_pointer_x();
6341                 len = ar->fade_out()->back()->when;
6342         }
6343
6344         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6345
6346         _editor->begin_reversible_command ("xfade trim");
6347         ar->playlist()->clear_owned_changes ();
6348
6349         if (start) {
6350                 ar->set_fade_in_length (new_length);
6351         } else {
6352                 ar->set_fade_out_length (new_length);
6353         }
6354
6355         /* Adjusting the xfade may affect other regions in the playlist, so we need
6356            to get undo Commands from the whole playlist rather than just the
6357            region.
6358         */
6359
6360         vector<Command*> cmds;
6361         ar->playlist()->rdiff (cmds);
6362         _editor->session()->add_commands (cmds);
6363         _editor->commit_reversible_command ();
6364
6365 }
6366
6367 void
6368 CrossfadeEdgeDrag::aborted (bool)
6369 {
6370         if (start) {
6371                 // arv->redraw_start_xfade ();
6372         } else {
6373                 // arv->redraw_end_xfade ();
6374         }
6375 }
6376
6377 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6378         : Drag (e, item, true)
6379         , line (new EditorCursor (*e))
6380 {
6381         line->set_position (pos);
6382         line->show ();
6383 }
6384
6385 RegionCutDrag::~RegionCutDrag ()
6386 {
6387         delete line;
6388 }
6389
6390 void
6391 RegionCutDrag::motion (GdkEvent*, bool)
6392 {
6393         framepos_t where = _drags->current_pointer_frame();
6394         _editor->snap_to (where);
6395
6396         line->set_position (where);
6397 }
6398
6399 void
6400 RegionCutDrag::finished (GdkEvent*, bool)
6401 {
6402         _editor->get_track_canvas()->canvas()->re_enter();
6403
6404         framepos_t pos = _drags->current_pointer_frame();
6405
6406         line->hide ();
6407
6408         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6409
6410         if (rs.empty()) {
6411                 return;
6412         }
6413
6414         _editor->split_regions_at (pos, rs);
6415 }
6416
6417 void
6418 RegionCutDrag::aborted (bool)
6419 {
6420 }