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         , _old_snap_type (e->snap_type())
3121         , before_state (0)
3122 {
3123         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3124         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3125         assert (_marker);
3126         _real_section = &_marker->meter();
3127
3128 }
3129
3130 void
3131 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3132 {
3133         Drag::start_grab (event, cursor);
3134         show_verbose_cursor_time (adjusted_current_frame(event));
3135 }
3136
3137 void
3138 MeterMarkerDrag::setup_pointer_frame_offset ()
3139 {
3140         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3141 }
3142
3143 void
3144 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3145 {
3146         if (first_move) {
3147                 // create a dummy marker to catch events, then hide it.
3148
3149                 char name[64];
3150                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3151
3152                 _marker = new MeterMarker (
3153                         *_editor,
3154                         *_editor->meter_group,
3155                         UIConfiguration::instance().color ("meter marker"),
3156                         name,
3157                         *new MeterSection (_marker->meter())
3158                 );
3159
3160                 /* use the new marker for the grab */
3161                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3162                 _marker->hide();
3163
3164                 TempoMap& map (_editor->session()->tempo_map());
3165                 /* get current state */
3166                 before_state = &map.get_state();
3167
3168                 if (!_copy) {
3169                         _editor->begin_reversible_command (_("move meter mark"));
3170                 } else {
3171                         _editor->begin_reversible_command (_("copy meter mark"));
3172
3173                         Timecode::BBT_Time bbt = _real_section->bbt();
3174
3175                         /* we can't add a meter where one currently exists */
3176                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3177                                 ++bbt.bars;
3178                         } else {
3179                                 --bbt.bars;
3180                         }
3181                         const double beat = map.beat_at_bbt (bbt);
3182                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3183                                                        , beat, bbt, map.frame_at_bbt (bbt), _real_section->position_lock_style());
3184
3185                 }
3186                 /* only snap to bars */
3187                 _editor->set_snap_to (SnapToBar);
3188         }
3189
3190         framepos_t pf = adjusted_current_frame (event);
3191
3192         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3193                 /* never snap to music for audio locked */
3194                 pf = adjusted_current_frame (event, false);
3195         }
3196
3197         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3198
3199         /* fake marker meeds to stay under the mouse, unlike the real one. */
3200         _marker->set_position (adjusted_current_frame (event, false));
3201
3202         show_verbose_cursor_time (_real_section->frame());
3203 }
3204
3205 void
3206 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3207 {
3208         if (!movement_occurred) {
3209                 if (was_double_click()) {
3210                         _editor->edit_meter_marker (*_marker);
3211                 }
3212                 return;
3213         }
3214
3215         /* reinstate old snap setting */
3216         _editor->set_snap_to (_old_snap_type);
3217
3218         TempoMap& map (_editor->session()->tempo_map());
3219
3220         XMLNode &after = map.get_state();
3221         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3222         _editor->commit_reversible_command ();
3223
3224         // delete the dummy marker we used for visual representation while moving.
3225         // a new visual marker will show up automatically.
3226         delete _marker;
3227 }
3228
3229 void
3230 MeterMarkerDrag::aborted (bool moved)
3231 {
3232         _marker->set_position (_marker->meter().frame ());
3233         if (moved) {
3234                 /* reinstate old snap setting */
3235                 _editor->set_snap_to (_old_snap_type);
3236                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3237                 // delete the dummy marker we used for visual representation while moving.
3238                 // a new visual marker will show up automatically.
3239                 delete _marker;
3240         }
3241 }
3242
3243 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3244         : Drag (e, i)
3245         , _copy (c)
3246         , before_state (0)
3247 {
3248         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3249
3250         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3251         _real_section = &_marker->tempo();
3252         _movable = _real_section->movable();
3253         assert (_marker);
3254 }
3255
3256 void
3257 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3258 {
3259         Drag::start_grab (event, cursor);
3260         if (!_real_section->active()) {
3261                 show_verbose_cursor_text (_("inactive"));
3262         } else {
3263                 show_verbose_cursor_time (adjusted_current_frame (event));
3264         }
3265 }
3266
3267 void
3268 TempoMarkerDrag::setup_pointer_frame_offset ()
3269 {
3270         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3271 }
3272
3273 void
3274 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3275 {
3276         if (!_real_section->active()) {
3277                 return;
3278         }
3279
3280         if (first_move) {
3281
3282                 // mvc drag - create a dummy marker to catch events, hide it.
3283
3284                 char name[64];
3285                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3286
3287                 TempoSection section (_marker->tempo());
3288
3289                 _marker = new TempoMarker (
3290                         *_editor,
3291                         *_editor->tempo_group,
3292                         UIConfiguration::instance().color ("tempo marker"),
3293                         name,
3294                         *new TempoSection (_marker->tempo())
3295                         );
3296
3297                 /* use the new marker for the grab */
3298                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3299                 _marker->hide();
3300
3301                 TempoMap& map (_editor->session()->tempo_map());
3302                 /* get current state */
3303                 before_state = &map.get_state();
3304
3305                 if (!_copy) {
3306                         _editor->begin_reversible_command (_("move tempo mark"));
3307
3308                 } else {
3309                         const framepos_t frame = adjusted_current_frame (event) + 1;
3310
3311                         _editor->begin_reversible_command (_("copy tempo mark"));
3312
3313                         if (_real_section->position_lock_style() == MusicTime) {
3314                                 _real_section = map.add_tempo (_marker->tempo(), map.pulse_at_frame (frame), 0, _real_section->type(), MusicTime);
3315                         } else {
3316                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3317                         }
3318                 }
3319
3320         }
3321
3322         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3323                 /* use vertical movement to alter tempo .. should be log */
3324                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3325                 stringstream strs;
3326
3327                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3328                 strs << new_bpm;
3329                 show_verbose_cursor_text (strs.str());
3330
3331         } else if (_movable && !_real_section->locked_to_meter()) {
3332                 TempoMap& map (_editor->session()->tempo_map());
3333                 const bool was_music = _real_section->position_lock_style() == MusicTime;
3334
3335                 const framepos_t pf = adjusted_current_frame (event);
3336
3337                 if (!_editor->snap_musical()) {
3338
3339                         if (was_music) {
3340                                 _real_section->set_position_lock_style (AudioTime);
3341                         }
3342
3343                         map.gui_move_tempo (_real_section, pf);
3344
3345                         if (was_music) {
3346                                 _real_section->set_position_lock_style (MusicTime);
3347                         }
3348
3349                 } else {
3350
3351                         if (!was_music) {
3352                                 _real_section->set_position_lock_style (MusicTime);
3353                         }
3354
3355                         map.gui_move_tempo (_real_section, pf);
3356
3357                         if (!was_music) {
3358                                 _real_section->set_position_lock_style (AudioTime);
3359                         }
3360                 }
3361
3362                 show_verbose_cursor_time (_real_section->frame());
3363         }
3364
3365         /* this has moved the bar lines themselves, so recalibrate the offset */
3366         setup_pointer_frame_offset();
3367
3368         _marker->set_position (adjusted_current_frame (event, false));
3369 }
3370
3371 void
3372 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3373 {
3374         if (!_real_section->active()) {
3375                 return;
3376         }
3377         if (!movement_occurred) {
3378                 if (was_double_click()) {
3379                         _editor->edit_tempo_marker (*_marker);
3380                 }
3381                 return;
3382         }
3383
3384         TempoMap& map (_editor->session()->tempo_map());
3385
3386         XMLNode &after = map.get_state();
3387         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3388         _editor->commit_reversible_command ();
3389
3390         // delete the dummy marker we used for visual representation while moving.
3391         // a new visual marker will show up automatically.
3392         delete _marker;
3393 }
3394
3395 void
3396 TempoMarkerDrag::aborted (bool moved)
3397 {
3398         _marker->set_position (_marker->tempo().frame());
3399         if (moved) {
3400                 TempoMap& map (_editor->session()->tempo_map());
3401                 map.set_state (*before_state, Stateful::current_state_version);
3402                 // delete the dummy marker we used for visual representation while moving.
3403                 // a new visual marker will show up automatically.
3404                 delete _marker;
3405         }
3406 }
3407
3408 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3409         : Drag (e, i)
3410         , _pulse (0.0)
3411         , _beat (0.0)
3412         , _tempo (0)
3413         , before_state (0)
3414 {
3415         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3416
3417 }
3418
3419 void
3420 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3421 {
3422         Drag::start_grab (event, cursor);
3423
3424         TempoMap& map (_editor->session()->tempo_map());
3425         ostringstream sstr;
3426
3427         _tempo = const_cast<TempoSection*> (&map.tempo_section_at_frame (raw_grab_frame()));
3428         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (adjusted_current_frame (event)).beats_per_minute() << "\n";
3429         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3430         show_verbose_cursor_text (sstr.str());
3431         finished (event, false);
3432 }
3433
3434 void
3435 BBTRulerDrag::setup_pointer_frame_offset ()
3436 {
3437         TempoMap& map (_editor->session()->tempo_map());
3438         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3439         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3440         if (divisions > 0) {
3441                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3442         } else {
3443                 /* while it makes some sense for the user to determine the division to 'grab',
3444                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3445                    and the result over steep tempo curves. Use sixteenths.
3446                 */
3447                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3448         }
3449         _pulse = map.pulse_at_beat (_beat);
3450         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3451 }
3452
3453 void
3454 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3455 {
3456         TempoMap& map (_editor->session()->tempo_map());
3457
3458         if (first_move) {
3459                 /* get current state */
3460                 before_state = &map.get_state();
3461                 _editor->begin_reversible_command (_("dilate tempo"));
3462         }
3463
3464         framepos_t const pf = adjusted_current_frame (event, false);
3465
3466         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3467                 /* adjust previous tempo to match pointer frame */
3468                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3469         }
3470         ostringstream sstr;
3471         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (pf).beats_per_minute() << "\n";
3472         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3473         show_verbose_cursor_text (sstr.str());
3474 }
3475
3476 void
3477 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3478 {
3479         if (!movement_occurred) {
3480                 return;
3481         }
3482
3483         TempoMap& map (_editor->session()->tempo_map());
3484
3485         XMLNode &after = map.get_state();
3486         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3487         _editor->commit_reversible_command ();
3488 }
3489
3490 void
3491 BBTRulerDrag::aborted (bool moved)
3492 {
3493         if (moved) {
3494                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3495         }
3496 }
3497
3498
3499 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3500         : Drag (e, &c.track_canvas_item(), false)
3501         , _cursor (c)
3502         , _stop (s)
3503         , _grab_zoom (0.0)
3504 {
3505         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3506 }
3507
3508 /** Do all the things we do when dragging the playhead to make it look as though
3509  *  we have located, without actually doing the locate (because that would cause
3510  *  the diskstream buffers to be refilled, which is too slow).
3511  */
3512 void
3513 CursorDrag::fake_locate (framepos_t t)
3514 {
3515         if (_editor->session () == 0) {
3516                 return;
3517         }
3518
3519         _editor->playhead_cursor->set_position (t);
3520
3521         Session* s = _editor->session ();
3522         if (s->timecode_transmission_suspended ()) {
3523                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3524                 /* This is asynchronous so it will be sent "now"
3525                  */
3526                 s->send_mmc_locate (f);
3527                 /* These are synchronous and will be sent during the next
3528                    process cycle
3529                 */
3530                 s->queue_full_time_code ();
3531                 s->queue_song_position_pointer ();
3532         }
3533
3534         show_verbose_cursor_time (t);
3535         _editor->UpdateAllTransportClocks (t);
3536 }
3537
3538 void
3539 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3540 {
3541         Drag::start_grab (event, c);
3542         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3543
3544         _grab_zoom = _editor->samples_per_pixel;
3545
3546         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3547
3548         _editor->snap_to_with_modifier (where, event);
3549
3550         _editor->_dragging_playhead = true;
3551
3552         Session* s = _editor->session ();
3553
3554         /* grab the track canvas item as well */
3555
3556         _cursor.track_canvas_item().grab();
3557
3558         if (s) {
3559                 if (_was_rolling && _stop) {
3560                         s->request_stop ();
3561                 }
3562
3563                 if (s->is_auditioning()) {
3564                         s->cancel_audition ();
3565                 }
3566
3567
3568                 if (AudioEngine::instance()->connected()) {
3569
3570                         /* do this only if we're the engine is connected
3571                          * because otherwise this request will never be
3572                          * serviced and we'll busy wait forever. likewise,
3573                          * notice if we are disconnected while waiting for the
3574                          * request to be serviced.
3575                          */
3576
3577                         s->request_suspend_timecode_transmission ();
3578                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3579                                 /* twiddle our thumbs */
3580                         }
3581                 }
3582         }
3583
3584         fake_locate (where - snap_delta (event->button.state));
3585 }
3586
3587 void
3588 CursorDrag::motion (GdkEvent* event, bool)
3589 {
3590         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3591         _editor->snap_to_with_modifier (where, event);
3592         if (where != last_pointer_frame()) {
3593                 fake_locate (where - snap_delta (event->button.state));
3594         }
3595 }
3596
3597 void
3598 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3599 {
3600         _editor->_dragging_playhead = false;
3601
3602         _cursor.track_canvas_item().ungrab();
3603
3604         if (!movement_occurred && _stop) {
3605                 return;
3606         }
3607
3608         motion (event, false);
3609
3610         Session* s = _editor->session ();
3611         if (s) {
3612                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3613                 _editor->_pending_locate_request = true;
3614                 s->request_resume_timecode_transmission ();
3615         }
3616 }
3617
3618 void
3619 CursorDrag::aborted (bool)
3620 {
3621         _cursor.track_canvas_item().ungrab();
3622
3623         if (_editor->_dragging_playhead) {
3624                 _editor->session()->request_resume_timecode_transmission ();
3625                 _editor->_dragging_playhead = false;
3626         }
3627
3628         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3629 }
3630
3631 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3632         : RegionDrag (e, i, p, v)
3633 {
3634         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3635 }
3636
3637 void
3638 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3639 {
3640         Drag::start_grab (event, cursor);
3641
3642         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3643         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3644         setup_snap_delta (r->position ());
3645
3646         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3647 }
3648
3649 void
3650 FadeInDrag::setup_pointer_frame_offset ()
3651 {
3652         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3653         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3654         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3655 }
3656
3657 void
3658 FadeInDrag::motion (GdkEvent* event, bool)
3659 {
3660         framecnt_t fade_length;
3661
3662         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3663         _editor->snap_to_with_modifier (pos, event);
3664         pos -= snap_delta (event->button.state);
3665
3666         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3667
3668         if (pos < (region->position() + 64)) {
3669                 fade_length = 64; // this should be a minimum defined somewhere
3670         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3671                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3672         } else {
3673                 fade_length = pos - region->position();
3674         }
3675
3676         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3677
3678                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3679
3680                 if (!tmp) {
3681                         continue;
3682                 }
3683
3684                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3685         }
3686
3687         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3688 }
3689
3690 void
3691 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3692 {
3693         if (!movement_occurred) {
3694                 return;
3695         }
3696
3697         framecnt_t fade_length;
3698         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3699         _editor->snap_to_with_modifier (pos, event);
3700         pos -= snap_delta (event->button.state);
3701
3702         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3703
3704         if (pos < (region->position() + 64)) {
3705                 fade_length = 64; // this should be a minimum defined somewhere
3706         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3707                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3708         } else {
3709                 fade_length = pos - region->position();
3710         }
3711
3712         bool in_command = false;
3713
3714         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3715
3716                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3717
3718                 if (!tmp) {
3719                         continue;
3720                 }
3721
3722                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3723                 XMLNode &before = alist->get_state();
3724
3725                 tmp->audio_region()->set_fade_in_length (fade_length);
3726                 tmp->audio_region()->set_fade_in_active (true);
3727
3728                 if (!in_command) {
3729                         _editor->begin_reversible_command (_("change fade in length"));
3730                         in_command = true;
3731                 }
3732                 XMLNode &after = alist->get_state();
3733                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3734         }
3735
3736         if (in_command) {
3737                 _editor->commit_reversible_command ();
3738         }
3739 }
3740
3741 void
3742 FadeInDrag::aborted (bool)
3743 {
3744         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3745                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3746
3747                 if (!tmp) {
3748                         continue;
3749                 }
3750
3751                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3752         }
3753 }
3754
3755 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3756         : RegionDrag (e, i, p, v)
3757 {
3758         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3759 }
3760
3761 void
3762 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3763 {
3764         Drag::start_grab (event, cursor);
3765
3766         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3767         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3768         setup_snap_delta (r->last_frame ());
3769
3770         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3771 }
3772
3773 void
3774 FadeOutDrag::setup_pointer_frame_offset ()
3775 {
3776         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3777         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3778         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3779 }
3780
3781 void
3782 FadeOutDrag::motion (GdkEvent* event, bool)
3783 {
3784         framecnt_t fade_length;
3785
3786         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3787         _editor->snap_to_with_modifier (pos, event);
3788         pos -= snap_delta (event->button.state);
3789
3790         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3791
3792         if (pos > (region->last_frame() - 64)) {
3793                 fade_length = 64; // this should really be a minimum fade defined somewhere
3794         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3795                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3796         } else {
3797                 fade_length = region->last_frame() - pos;
3798         }
3799
3800         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3801
3802                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3803
3804                 if (!tmp) {
3805                         continue;
3806                 }
3807
3808                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3809         }
3810
3811         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3812 }
3813
3814 void
3815 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3816 {
3817         if (!movement_occurred) {
3818                 return;
3819         }
3820
3821         framecnt_t fade_length;
3822
3823         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3824         _editor->snap_to_with_modifier (pos, event);
3825         pos -= snap_delta (event->button.state);
3826
3827         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3828
3829         if (pos > (region->last_frame() - 64)) {
3830                 fade_length = 64; // this should really be a minimum fade defined somewhere
3831         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3832                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3833         } else {
3834                 fade_length = region->last_frame() - pos;
3835         }
3836
3837         bool in_command = false;
3838
3839         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3840
3841                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3842
3843                 if (!tmp) {
3844                         continue;
3845                 }
3846
3847                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3848                 XMLNode &before = alist->get_state();
3849
3850                 tmp->audio_region()->set_fade_out_length (fade_length);
3851                 tmp->audio_region()->set_fade_out_active (true);
3852
3853                 if (!in_command) {
3854                         _editor->begin_reversible_command (_("change fade out length"));
3855                         in_command = true;
3856                 }
3857                 XMLNode &after = alist->get_state();
3858                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3859         }
3860
3861         if (in_command) {
3862                 _editor->commit_reversible_command ();
3863         }
3864 }
3865
3866 void
3867 FadeOutDrag::aborted (bool)
3868 {
3869         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3870                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3871
3872                 if (!tmp) {
3873                         continue;
3874                 }
3875
3876                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3877         }
3878 }
3879
3880 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3881         : Drag (e, i)
3882         , _selection_changed (false)
3883 {
3884         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3885         Gtk::Window* toplevel = _editor->current_toplevel();
3886         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3887
3888         assert (_marker);
3889
3890         _points.push_back (ArdourCanvas::Duple (0, 0));
3891
3892         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3893 }
3894
3895 MarkerDrag::~MarkerDrag ()
3896 {
3897         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3898                 delete i->location;
3899         }
3900 }
3901
3902 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3903 {
3904         location = new Location (*l);
3905         markers.push_back (m);
3906         move_both = false;
3907 }
3908
3909 void
3910 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3911 {
3912         Drag::start_grab (event, cursor);
3913
3914         bool is_start;
3915
3916         Location *location = _editor->find_location_from_marker (_marker, is_start);
3917         _editor->_dragging_edit_point = true;
3918
3919         update_item (location);
3920
3921         // _drag_line->show();
3922         // _line->raise_to_top();
3923
3924         if (is_start) {
3925                 show_verbose_cursor_time (location->start());
3926         } else {
3927                 show_verbose_cursor_time (location->end());
3928         }
3929         setup_snap_delta (is_start ? location->start() : location->end());
3930
3931         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3932
3933         switch (op) {
3934         case Selection::Toggle:
3935                 /* we toggle on the button release */
3936                 break;
3937         case Selection::Set:
3938                 if (!_editor->selection->selected (_marker)) {
3939                         _editor->selection->set (_marker);
3940                         _selection_changed = true;
3941                 }
3942                 break;
3943         case Selection::Extend:
3944         {
3945                 Locations::LocationList ll;
3946                 list<ArdourMarker*> to_add;
3947                 framepos_t s, e;
3948                 _editor->selection->markers.range (s, e);
3949                 s = min (_marker->position(), s);
3950                 e = max (_marker->position(), e);
3951                 s = min (s, e);
3952                 e = max (s, e);
3953                 if (e < max_framepos) {
3954                         ++e;
3955                 }
3956                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3957                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3958                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
3959                         if (lm) {
3960                                 if (lm->start) {
3961                                         to_add.push_back (lm->start);
3962                                 }
3963                                 if (lm->end) {
3964                                         to_add.push_back (lm->end);
3965                                 }
3966                         }
3967                 }
3968                 if (!to_add.empty()) {
3969                         _editor->selection->add (to_add);
3970                         _selection_changed = true;
3971                 }
3972                 break;
3973         }
3974         case Selection::Add:
3975                 _editor->selection->add (_marker);
3976                 _selection_changed = true;
3977
3978                 break;
3979         }
3980
3981         /* Set up copies for us to manipulate during the drag
3982          */
3983
3984         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
3985
3986                 Location* l = _editor->find_location_from_marker (*i, is_start);
3987
3988                 if (!l) {
3989                         continue;
3990                 }
3991
3992                 if (l->is_mark()) {
3993                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
3994                 } else {
3995                         /* range: check that the other end of the range isn't
3996                            already there.
3997                         */
3998                         CopiedLocationInfo::iterator x;
3999                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4000                                 if (*(*x).location == *l) {
4001                                         break;
4002                                 }
4003                         }
4004                         if (x == _copied_locations.end()) {
4005                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4006                         } else {
4007                                 (*x).markers.push_back (*i);
4008                                 (*x).move_both = true;
4009                         }
4010                 }
4011
4012         }
4013 }
4014
4015 void
4016 MarkerDrag::setup_pointer_frame_offset ()
4017 {
4018         bool is_start;
4019         Location *location = _editor->find_location_from_marker (_marker, is_start);
4020         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4021 }
4022
4023 void
4024 MarkerDrag::motion (GdkEvent* event, bool)
4025 {
4026         framecnt_t f_delta = 0;
4027         bool is_start;
4028         bool move_both = false;
4029         Location *real_location;
4030         Location *copy_location = 0;
4031         framecnt_t const sd = snap_delta (event->button.state);
4032
4033         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4034         framepos_t next = newframe;
4035
4036         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4037                 move_both = true;
4038         }
4039
4040         CopiedLocationInfo::iterator x;
4041
4042         /* find the marker we're dragging, and compute the delta */
4043
4044         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4045
4046                 copy_location = (*x).location;
4047
4048                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4049
4050                         /* this marker is represented by this
4051                          * CopiedLocationMarkerInfo
4052                          */
4053
4054                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4055                                 /* que pasa ?? */
4056                                 return;
4057                         }
4058
4059                         if (real_location->is_mark()) {
4060                                 f_delta = newframe - copy_location->start();
4061                         } else {
4062
4063
4064                                 switch (_marker->type()) {
4065                                 case ArdourMarker::SessionStart:
4066                                 case ArdourMarker::RangeStart:
4067                                 case ArdourMarker::LoopStart:
4068                                 case ArdourMarker::PunchIn:
4069                                         f_delta = newframe - copy_location->start();
4070                                         break;
4071
4072                                 case ArdourMarker::SessionEnd:
4073                                 case ArdourMarker::RangeEnd:
4074                                 case ArdourMarker::LoopEnd:
4075                                 case ArdourMarker::PunchOut:
4076                                         f_delta = newframe - copy_location->end();
4077                                         break;
4078                                 default:
4079                                         /* what kind of marker is this ? */
4080                                         return;
4081                                 }
4082                         }
4083
4084                         break;
4085                 }
4086         }
4087
4088         if (x == _copied_locations.end()) {
4089                 /* hmm, impossible - we didn't find the dragged marker */
4090                 return;
4091         }
4092
4093         /* now move them all */
4094
4095         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4096
4097                 copy_location = x->location;
4098
4099                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4100                         continue;
4101                 }
4102
4103                 if (real_location->locked()) {
4104                         continue;
4105                 }
4106
4107                 if (copy_location->is_mark()) {
4108
4109                         /* now move it */
4110
4111                         copy_location->set_start (copy_location->start() + f_delta);
4112
4113                 } else {
4114
4115                         framepos_t new_start = copy_location->start() + f_delta;
4116                         framepos_t new_end = copy_location->end() + f_delta;
4117
4118                         if (is_start) { // start-of-range marker
4119
4120                                 if (move_both || (*x).move_both) {
4121                                         copy_location->set_start (new_start);
4122                                         copy_location->set_end (new_end);
4123                                 } else  if (new_start < copy_location->end()) {
4124                                         copy_location->set_start (new_start);
4125                                 } else if (newframe > 0) {
4126                                         //_editor->snap_to (next, RoundUpAlways, true);
4127                                         copy_location->set_end (next);
4128                                         copy_location->set_start (newframe);
4129                                 }
4130
4131                         } else { // end marker
4132
4133                                 if (move_both || (*x).move_both) {
4134                                         copy_location->set_end (new_end);
4135                                         copy_location->set_start (new_start);
4136                                 } else if (new_end > copy_location->start()) {
4137                                         copy_location->set_end (new_end);
4138                                 } else if (newframe > 0) {
4139                                         //_editor->snap_to (next, RoundDownAlways, true);
4140                                         copy_location->set_start (next);
4141                                         copy_location->set_end (newframe);
4142                                 }
4143                         }
4144                 }
4145
4146                 update_item (copy_location);
4147
4148                 /* now lookup the actual GUI items used to display this
4149                  * location and move them to wherever the copy of the location
4150                  * is now. This means that the logic in ARDOUR::Location is
4151                  * still enforced, even though we are not (yet) modifying
4152                  * the real Location itself.
4153                  */
4154
4155                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4156
4157                 if (lm) {
4158                         lm->set_position (copy_location->start(), copy_location->end());
4159                 }
4160
4161         }
4162
4163         assert (!_copied_locations.empty());
4164
4165         show_verbose_cursor_time (newframe);
4166 }
4167
4168 void
4169 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4170 {
4171         if (!movement_occurred) {
4172
4173                 if (was_double_click()) {
4174                         _editor->rename_marker (_marker);
4175                         return;
4176                 }
4177
4178                 /* just a click, do nothing but finish
4179                    off the selection process
4180                 */
4181
4182                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4183                 switch (op) {
4184                 case Selection::Set:
4185                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4186                                 _editor->selection->set (_marker);
4187                                 _selection_changed = true;
4188                         }
4189                         break;
4190
4191                 case Selection::Toggle:
4192                         /* we toggle on the button release, click only */
4193                         _editor->selection->toggle (_marker);
4194                         _selection_changed = true;
4195
4196                         break;
4197
4198                 case Selection::Extend:
4199                 case Selection::Add:
4200                         break;
4201                 }
4202
4203                 if (_selection_changed) {
4204                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4205                         _editor->commit_reversible_selection_op();
4206                 }
4207
4208                 return;
4209         }
4210
4211         _editor->_dragging_edit_point = false;
4212
4213         XMLNode &before = _editor->session()->locations()->get_state();
4214         bool in_command = false;
4215
4216         MarkerSelection::iterator i;
4217         CopiedLocationInfo::iterator x;
4218         bool is_start;
4219
4220         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4221              x != _copied_locations.end() && i != _editor->selection->markers.end();
4222              ++i, ++x) {
4223
4224                 Location * location = _editor->find_location_from_marker (*i, is_start);
4225
4226                 if (location) {
4227
4228                         if (location->locked()) {
4229                                 continue;
4230                         }
4231                         if (!in_command) {
4232                                 _editor->begin_reversible_command ( _("move marker") );
4233                                 in_command = true;
4234                         }
4235                         if (location->is_mark()) {
4236                                 location->set_start (((*x).location)->start());
4237                         } else {
4238                                 location->set (((*x).location)->start(), ((*x).location)->end());
4239                         }
4240                 }
4241         }
4242
4243         if (in_command) {
4244                 XMLNode &after = _editor->session()->locations()->get_state();
4245                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4246                 _editor->commit_reversible_command ();
4247         }
4248 }
4249
4250 void
4251 MarkerDrag::aborted (bool movement_occurred)
4252 {
4253         if (!movement_occurred) {
4254                 return;
4255         }
4256
4257         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4258
4259                 /* move all markers to their original location */
4260
4261
4262                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4263
4264                         bool is_start;
4265                         Location * location = _editor->find_location_from_marker (*m, is_start);
4266
4267                         if (location) {
4268                                 (*m)->set_position (is_start ? location->start() : location->end());
4269                         }
4270                 }
4271         }
4272 }
4273
4274 void
4275 MarkerDrag::update_item (Location*)
4276 {
4277         /* noop */
4278 }
4279
4280 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4281         : Drag (e, i)
4282         , _fixed_grab_x (0.0)
4283         , _fixed_grab_y (0.0)
4284         , _cumulative_x_drag (0.0)
4285         , _cumulative_y_drag (0.0)
4286         , _pushing (false)
4287         , _final_index (0)
4288 {
4289         if (_zero_gain_fraction < 0.0) {
4290                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4291         }
4292
4293         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4294
4295         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4296         assert (_point);
4297 }
4298
4299
4300 void
4301 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4302 {
4303         Drag::start_grab (event, _editor->cursors()->fader);
4304
4305         // start the grab at the center of the control point so
4306         // the point doesn't 'jump' to the mouse after the first drag
4307         _fixed_grab_x = _point->get_x();
4308         _fixed_grab_y = _point->get_y();
4309
4310         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4311         setup_snap_delta (pos);
4312
4313         float const fraction = 1 - (_point->get_y() / _point->line().height());
4314         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4315
4316         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4317
4318         if (!_point->can_slide ()) {
4319                 _x_constrained = true;
4320         }
4321 }
4322
4323 void
4324 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4325 {
4326         double dx = _drags->current_pointer_x() - last_pointer_x();
4327         double dy = current_pointer_y() - last_pointer_y();
4328         bool need_snap = true;
4329
4330         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4331                 dx *= 0.1;
4332                 dy *= 0.1;
4333                 need_snap = false;
4334         }
4335
4336         /* coordinate in pixels relative to the start of the region (for region-based automation)
4337            or track (for track-based automation) */
4338         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4339         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4340
4341         // calculate zero crossing point. back off by .01 to stay on the
4342         // positive side of zero
4343         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4344
4345         if (_x_constrained) {
4346                 cx = _fixed_grab_x;
4347         }
4348         if (_y_constrained) {
4349                 cy = _fixed_grab_y;
4350         }
4351
4352         _cumulative_x_drag = cx - _fixed_grab_x;
4353         _cumulative_y_drag = cy - _fixed_grab_y;
4354
4355         cx = max (0.0, cx);
4356         cy = max (0.0, cy);
4357         cy = min ((double) _point->line().height(), cy);
4358
4359         // make sure we hit zero when passing through
4360         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4361                 cy = zero_gain_y;
4362         }
4363
4364         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4365
4366         if (!_x_constrained && need_snap) {
4367                 _editor->snap_to_with_modifier (cx_frames, event);
4368         }
4369
4370         cx_frames -= snap_delta (event->button.state);
4371         cx_frames = min (cx_frames, _point->line().maximum_time());
4372
4373         float const fraction = 1.0 - (cy / _point->line().height());
4374
4375         if (first_motion) {
4376                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4377                 _editor->begin_reversible_command (_("automation event move"));
4378                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4379         }
4380         pair<double, float> result;
4381         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4382
4383         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4384 }
4385
4386 void
4387 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4388 {
4389         if (!movement_occurred) {
4390
4391                 /* just a click */
4392                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4393                         _editor->reset_point_selection ();
4394                 }
4395
4396         } else {
4397                 _point->line().end_drag (_pushing, _final_index);
4398                 _editor->commit_reversible_command ();
4399         }
4400 }
4401
4402 void
4403 ControlPointDrag::aborted (bool)
4404 {
4405         _point->line().reset ();
4406 }
4407
4408 bool
4409 ControlPointDrag::active (Editing::MouseMode m)
4410 {
4411         if (m == Editing::MouseDraw) {
4412                 /* always active in mouse draw */
4413                 return true;
4414         }
4415
4416         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4417         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4418 }
4419
4420 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4421         : Drag (e, i)
4422         , _line (0)
4423         , _fixed_grab_x (0.0)
4424         , _fixed_grab_y (0.0)
4425         , _cumulative_y_drag (0)
4426         , _before (0)
4427         , _after (0)
4428 {
4429         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4430 }
4431
4432 void
4433 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4434 {
4435         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4436         assert (_line);
4437
4438         _item = &_line->grab_item ();
4439
4440         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4441            origin, and ditto for y.
4442         */
4443
4444         double mx = event->button.x;
4445         double my = event->button.y;
4446
4447         _line->grab_item().canvas_to_item (mx, my);
4448
4449         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4450
4451         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4452                 /* no adjacent points */
4453                 return;
4454         }
4455
4456         Drag::start_grab (event, _editor->cursors()->fader);
4457
4458         /* store grab start in item frame */
4459         double const bx = _line->nth (_before)->get_x();
4460         double const ax = _line->nth (_after)->get_x();
4461         double const click_ratio = (ax - mx) / (ax - bx);
4462
4463         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4464
4465         _fixed_grab_x = mx;
4466         _fixed_grab_y = cy;
4467
4468         double fraction = 1.0 - (cy / _line->height());
4469
4470         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4471 }
4472
4473 void
4474 LineDrag::motion (GdkEvent* event, bool first_move)
4475 {
4476         double dy = current_pointer_y() - last_pointer_y();
4477
4478         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4479                 dy *= 0.1;
4480         }
4481
4482         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4483
4484         _cumulative_y_drag = cy - _fixed_grab_y;
4485
4486         cy = max (0.0, cy);
4487         cy = min ((double) _line->height(), cy);
4488
4489         double const fraction = 1.0 - (cy / _line->height());
4490         uint32_t ignored;
4491
4492         if (first_move) {
4493                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4494
4495                 _editor->begin_reversible_command (_("automation range move"));
4496                 _line->start_drag_line (_before, _after, initial_fraction);
4497         }
4498
4499         /* we are ignoring x position for this drag, so we can just pass in anything */
4500         pair<double, float> result;
4501
4502         result = _line->drag_motion (0, fraction, true, false, ignored);
4503         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4504 }
4505
4506 void
4507 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4508 {
4509         if (movement_occurred) {
4510                 motion (event, false);
4511                 _line->end_drag (false, 0);
4512                 _editor->commit_reversible_command ();
4513         } else {
4514                 /* add a new control point on the line */
4515
4516                 AutomationTimeAxisView* atv;
4517
4518                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4519                         framepos_t where = grab_frame ();
4520
4521                         double cx = 0;
4522                         double cy = _fixed_grab_y;
4523
4524                         _line->grab_item().item_to_canvas (cx, cy);
4525
4526                         atv->add_automation_event (event, where, cy, false);
4527                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4528                         AudioRegionView* arv;
4529
4530                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4531                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4532                         }
4533                 }
4534         }
4535 }
4536
4537 void
4538 LineDrag::aborted (bool)
4539 {
4540         _line->reset ();
4541 }
4542
4543 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4544         : Drag (e, i),
4545           _line (0),
4546           _arv (0),
4547           _region_view_grab_x (0.0),
4548           _cumulative_x_drag (0),
4549           _before (0.0),
4550           _max_x (0)
4551 {
4552         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4553 }
4554
4555 void
4556 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4557 {
4558         Drag::start_grab (event);
4559
4560         _line = reinterpret_cast<Line*> (_item);
4561         assert (_line);
4562
4563         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4564
4565         double cx = event->button.x;
4566         double cy = event->button.y;
4567
4568         _item->parent()->canvas_to_item (cx, cy);
4569
4570         /* store grab start in parent frame */
4571         _region_view_grab_x = cx;
4572
4573         _before = *(float*) _item->get_data ("position");
4574
4575         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4576
4577         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4578 }
4579
4580 void
4581 FeatureLineDrag::motion (GdkEvent*, bool)
4582 {
4583         double dx = _drags->current_pointer_x() - last_pointer_x();
4584
4585         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4586
4587         _cumulative_x_drag += dx;
4588
4589         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4590
4591         if (cx > _max_x){
4592                 cx = _max_x;
4593         }
4594         else if(cx < 0){
4595                 cx = 0;
4596         }
4597
4598         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4599         assert (bbox);
4600         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4601
4602         float *pos = new float;
4603         *pos = cx;
4604
4605         _line->set_data ("position", pos);
4606
4607         _before = cx;
4608 }
4609
4610 void
4611 FeatureLineDrag::finished (GdkEvent*, bool)
4612 {
4613         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4614         _arv->update_transient(_before, _before);
4615 }
4616
4617 void
4618 FeatureLineDrag::aborted (bool)
4619 {
4620         //_line->reset ();
4621 }
4622
4623 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4624         : Drag (e, i)
4625         , _vertical_only (false)
4626 {
4627         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4628 }
4629
4630 void
4631 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4632 {
4633         Drag::start_grab (event);
4634         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4635 }
4636
4637 void
4638 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4639 {
4640         framepos_t start;
4641         framepos_t end;
4642         double y1;
4643         double y2;
4644
4645         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4646
4647         framepos_t grab = grab_frame ();
4648         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4649                 _editor->snap_to_with_modifier (grab, event);
4650         } else {
4651                 grab = raw_grab_frame ();
4652         }
4653
4654         /* base start and end on initial click position */
4655
4656         if (pf < grab) {
4657                 start = pf;
4658                 end = grab;
4659         } else {
4660                 end = pf;
4661                 start = grab;
4662         }
4663
4664         if (current_pointer_y() < grab_y()) {
4665                 y1 = current_pointer_y();
4666                 y2 = grab_y();
4667         } else {
4668                 y2 = current_pointer_y();
4669                 y1 = grab_y();
4670         }
4671
4672         if (start != end || y1 != y2) {
4673
4674                 double x1 = _editor->sample_to_pixel (start);
4675                 double x2 = _editor->sample_to_pixel (end);
4676                 const double min_dimension = 2.0;
4677
4678                 if (_vertical_only) {
4679                         /* fixed 10 pixel width */
4680                         x2 = x1 + 10;
4681                 } else {
4682                         if (x2 < x1) {
4683                                 x2 = min (x1 - min_dimension, x2);
4684                         } else {
4685                                 x2 = max (x1 + min_dimension, x2);
4686                         }
4687                 }
4688
4689                 if (y2 < y1) {
4690                         y2 = min (y1 - min_dimension, y2);
4691                 } else {
4692                         y2 = max (y1 + min_dimension, y2);
4693                 }
4694
4695                 /* translate rect into item space and set */
4696
4697                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4698
4699                 /* this drag is a _trackview_only == true drag, so the y1 and
4700                  * y2 (computed using current_pointer_y() and grab_y()) will be
4701                  * relative to the top of the trackview group). The
4702                  * rubberband rect has the same parent/scroll offset as the
4703                  * the trackview group, so we can use the "r" rect directly
4704                  * to set the shape of the rubberband.
4705                  */
4706
4707                 _editor->rubberband_rect->set (r);
4708                 _editor->rubberband_rect->show();
4709                 _editor->rubberband_rect->raise_to_top();
4710
4711                 show_verbose_cursor_time (pf);
4712
4713                 do_select_things (event, true);
4714         }
4715 }
4716
4717 void
4718 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4719 {
4720         framepos_t x1;
4721         framepos_t x2;
4722         framepos_t grab = grab_frame ();
4723         framepos_t lpf = last_pointer_frame ();
4724
4725         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4726                 grab = raw_grab_frame ();
4727                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4728         }
4729
4730         if (grab < lpf) {
4731                 x1 = grab;
4732                 x2 = lpf;
4733         } else {
4734                 x2 = grab;
4735                 x1 = lpf;
4736         }
4737
4738         double y1;
4739         double y2;
4740
4741         if (current_pointer_y() < grab_y()) {
4742                 y1 = current_pointer_y();
4743                 y2 = grab_y();
4744         } else {
4745                 y2 = current_pointer_y();
4746                 y1 = grab_y();
4747         }
4748
4749         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4750 }
4751
4752 void
4753 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4754 {
4755         if (movement_occurred) {
4756
4757                 motion (event, false);
4758                 do_select_things (event, false);
4759
4760         } else {
4761
4762                 /* just a click */
4763
4764                 bool do_deselect = true;
4765                 MidiTimeAxisView* mtv;
4766
4767                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4768                         /* MIDI track */
4769                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4770                                 /* nothing selected */
4771                                 add_midi_region (mtv, true);
4772                                 do_deselect = false;
4773                         }
4774                 }
4775
4776                 /* do not deselect if Primary or Tertiary (toggle-select or
4777                  * extend-select are pressed.
4778                  */
4779
4780                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4781                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4782                     do_deselect) {
4783                         deselect_things ();
4784                 }
4785
4786         }
4787
4788         _editor->rubberband_rect->hide();
4789 }
4790
4791 void
4792 RubberbandSelectDrag::aborted (bool)
4793 {
4794         _editor->rubberband_rect->hide ();
4795 }
4796
4797 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4798         : RegionDrag (e, i, p, v)
4799 {
4800         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4801 }
4802
4803 void
4804 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4805 {
4806         Drag::start_grab (event, cursor);
4807
4808         _editor->get_selection().add (_primary);
4809
4810         framepos_t where = _primary->region()->position();
4811         setup_snap_delta (where);
4812
4813         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4814 }
4815
4816 void
4817 TimeFXDrag::motion (GdkEvent* event, bool)
4818 {
4819         RegionView* rv = _primary;
4820         StreamView* cv = rv->get_time_axis_view().view ();
4821
4822         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4823         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4824         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4825         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4826         _editor->snap_to_with_modifier (pf, event);
4827         pf -= snap_delta (event->button.state);
4828
4829         if (pf > rv->region()->position()) {
4830                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4831         }
4832
4833         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4834 }
4835
4836 void
4837 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4838 {
4839         /* this may have been a single click, no drag. We still want the dialog
4840            to show up in that case, so that the user can manually edit the
4841            parameters for the timestretch.
4842         */
4843
4844         float fraction = 1.0;
4845
4846         if (movement_occurred) {
4847
4848                 motion (event, false);
4849
4850                 _primary->get_time_axis_view().hide_timestretch ();
4851
4852                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4853
4854                 if (adjusted_frame_pos < _primary->region()->position()) {
4855                         /* backwards drag of the left edge - not usable */
4856                         return;
4857                 }
4858
4859                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4860
4861                 fraction = (double) newlen / (double) _primary->region()->length();
4862
4863 #ifndef USE_RUBBERBAND
4864                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4865                 if (_primary->region()->data_type() == DataType::AUDIO) {
4866                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4867                 }
4868 #endif
4869         }
4870
4871         if (!_editor->get_selection().regions.empty()) {
4872                 /* primary will already be included in the selection, and edit
4873                    group shared editing will propagate selection across
4874                    equivalent regions, so just use the current region
4875                    selection.
4876                 */
4877
4878                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4879                         error << _("An error occurred while executing time stretch operation") << endmsg;
4880                 }
4881         }
4882 }
4883
4884 void
4885 TimeFXDrag::aborted (bool)
4886 {
4887         _primary->get_time_axis_view().hide_timestretch ();
4888 }
4889
4890 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4891         : Drag (e, i)
4892 {
4893         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4894 }
4895
4896 void
4897 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4898 {
4899         Drag::start_grab (event);
4900 }
4901
4902 void
4903 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4904 {
4905         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4906 }
4907
4908 void
4909 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4910 {
4911         if (movement_occurred && _editor->session()) {
4912                 /* make sure we stop */
4913                 _editor->session()->request_transport_speed (0.0);
4914         }
4915 }
4916
4917 void
4918 ScrubDrag::aborted (bool)
4919 {
4920         /* XXX: TODO */
4921 }
4922
4923 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4924         : Drag (e, i)
4925         , _operation (o)
4926         , _add (false)
4927         , _time_selection_at_start (!_editor->get_selection().time.empty())
4928 {
4929         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4930
4931         if (_time_selection_at_start) {
4932                 start_at_start = _editor->get_selection().time.start();
4933                 end_at_start = _editor->get_selection().time.end_frame();
4934         }
4935 }
4936
4937 void
4938 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4939 {
4940         if (_editor->session() == 0) {
4941                 return;
4942         }
4943
4944         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4945
4946         switch (_operation) {
4947         case CreateSelection:
4948                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4949                         _add = true;
4950                 } else {
4951                         _add = false;
4952                 }
4953                 cursor = _editor->cursors()->selector;
4954                 Drag::start_grab (event, cursor);
4955                 break;
4956
4957         case SelectionStartTrim:
4958                 if (_editor->clicked_axisview) {
4959                         _editor->clicked_axisview->order_selection_trims (_item, true);
4960                 }
4961                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
4962                 break;
4963
4964         case SelectionEndTrim:
4965                 if (_editor->clicked_axisview) {
4966                         _editor->clicked_axisview->order_selection_trims (_item, false);
4967                 }
4968                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
4969                 break;
4970
4971         case SelectionMove:
4972                 Drag::start_grab (event, cursor);
4973                 break;
4974
4975         case SelectionExtend:
4976                 Drag::start_grab (event, cursor);
4977                 break;
4978         }
4979
4980         if (_operation == SelectionMove) {
4981                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
4982         } else {
4983                 show_verbose_cursor_time (adjusted_current_frame (event));
4984         }
4985 }
4986
4987 void
4988 SelectionDrag::setup_pointer_frame_offset ()
4989 {
4990         switch (_operation) {
4991         case CreateSelection:
4992                 _pointer_frame_offset = 0;
4993                 break;
4994
4995         case SelectionStartTrim:
4996         case SelectionMove:
4997                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
4998                 break;
4999
5000         case SelectionEndTrim:
5001                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5002                 break;
5003
5004         case SelectionExtend:
5005                 break;
5006         }
5007 }
5008
5009 void
5010 SelectionDrag::motion (GdkEvent* event, bool first_move)
5011 {
5012         framepos_t start = 0;
5013         framepos_t end = 0;
5014         framecnt_t length = 0;
5015         framecnt_t distance = 0;
5016
5017         framepos_t const pending_position = adjusted_current_frame (event);
5018
5019         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5020                 return;
5021         }
5022
5023         switch (_operation) {
5024         case CreateSelection:
5025         {
5026                 framepos_t grab = grab_frame ();
5027
5028                 if (first_move) {
5029                         grab = adjusted_current_frame (event, false);
5030                         if (grab < pending_position) {
5031                                 _editor->snap_to (grab, RoundDownMaybe);
5032                         }  else {
5033                                 _editor->snap_to (grab, RoundUpMaybe);
5034                         }
5035                 }
5036
5037                 if (pending_position < grab) {
5038                         start = pending_position;
5039                         end = grab;
5040                 } else {
5041                         end = pending_position;
5042                         start = grab;
5043                 }
5044
5045                 /* first drag: Either add to the selection
5046                    or create a new selection
5047                 */
5048
5049                 if (first_move) {
5050
5051                         if (_add) {
5052
5053                                 /* adding to the selection */
5054                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5055                                 _editor->clicked_selection = _editor->selection->add (start, end);
5056                                 _add = false;
5057
5058                         } else {
5059
5060                                 /* new selection */
5061
5062                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5063                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5064                                 }
5065
5066                                 _editor->clicked_selection = _editor->selection->set (start, end);
5067                         }
5068                 }
5069
5070                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5071                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5072                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5073                 if (atest) {
5074                         _editor->selection->add (atest);
5075                         break;
5076                 }
5077
5078                 /* select all tracks within the rectangle that we've marked out so far */
5079                 TrackViewList new_selection;
5080                 TrackViewList& all_tracks (_editor->track_views);
5081
5082                 ArdourCanvas::Coord const top = grab_y();
5083                 ArdourCanvas::Coord const bottom = current_pointer_y();
5084
5085                 if (top >= 0 && bottom >= 0) {
5086
5087                         //first, find the tracks that are covered in the y range selection
5088                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5089                                 if ((*i)->covered_by_y_range (top, bottom)) {
5090                                         new_selection.push_back (*i);
5091                                 }
5092                         }
5093
5094                         //now find any tracks that are GROUPED with the tracks we selected
5095                         TrackViewList grouped_add = new_selection;
5096                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5097                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5098                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5099                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5100                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5101                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5102                                                         grouped_add.push_back (*j);
5103                                         }
5104                                 }
5105                         }
5106
5107                         //now compare our list with the current selection, and add or remove as necessary
5108                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5109                         TrackViewList tracks_to_add;
5110                         TrackViewList tracks_to_remove;
5111                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5112                                 if ( !_editor->selection->tracks.contains ( *i ) )
5113                                         tracks_to_add.push_back ( *i );
5114                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5115                                 if ( !grouped_add.contains ( *i ) )
5116                                         tracks_to_remove.push_back ( *i );
5117                         _editor->selection->add(tracks_to_add);
5118                         _editor->selection->remove(tracks_to_remove);
5119
5120                 }
5121         }
5122         break;
5123
5124         case SelectionStartTrim:
5125
5126                 end = _editor->selection->time[_editor->clicked_selection].end;
5127
5128                 if (pending_position > end) {
5129                         start = end;
5130                 } else {
5131                         start = pending_position;
5132                 }
5133                 break;
5134
5135         case SelectionEndTrim:
5136
5137                 start = _editor->selection->time[_editor->clicked_selection].start;
5138
5139                 if (pending_position < start) {
5140                         end = start;
5141                 } else {
5142                         end = pending_position;
5143                 }
5144
5145                 break;
5146
5147         case SelectionMove:
5148
5149                 start = _editor->selection->time[_editor->clicked_selection].start;
5150                 end = _editor->selection->time[_editor->clicked_selection].end;
5151
5152                 length = end - start;
5153                 distance = pending_position - start;
5154                 start = pending_position;
5155                 _editor->snap_to (start);
5156
5157                 end = start + length;
5158
5159                 break;
5160
5161         case SelectionExtend:
5162                 break;
5163         }
5164
5165         if (start != end) {
5166                 switch (_operation) {
5167                 case SelectionMove:
5168                         if (_time_selection_at_start) {
5169                                 _editor->selection->move_time (distance);
5170                         }
5171                         break;
5172                 default:
5173                         _editor->selection->replace (_editor->clicked_selection, start, end);
5174                 }
5175         }
5176
5177         if (_operation == SelectionMove) {
5178                 show_verbose_cursor_time(start);
5179         } else {
5180                 show_verbose_cursor_time(pending_position);
5181         }
5182 }
5183
5184 void
5185 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5186 {
5187         Session* s = _editor->session();
5188
5189         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5190         if (movement_occurred) {
5191                 motion (event, false);
5192                 /* XXX this is not object-oriented programming at all. ick */
5193                 if (_editor->selection->time.consolidate()) {
5194                         _editor->selection->TimeChanged ();
5195                 }
5196
5197                 /* XXX what if its a music time selection? */
5198                 if (s) {
5199                         if (s->get_play_range() && s->transport_rolling()) {
5200                                 s->request_play_range (&_editor->selection->time, true);
5201                         } else if (!s->config.get_external_sync()) {
5202                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5203                                         if (_operation == SelectionEndTrim)
5204                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5205                                         else
5206                                                 s->request_locate (_editor->get_selection().time.start());
5207                                 }
5208                         }
5209
5210                         if (_editor->get_selection().time.length() != 0) {
5211                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5212                         } else {
5213                                 s->clear_range_selection ();
5214                         }
5215                 }
5216
5217         } else {
5218                 /* just a click, no pointer movement.
5219                  */
5220
5221                 if (_operation == SelectionExtend) {
5222                         if (_time_selection_at_start) {
5223                                 framepos_t pos = adjusted_current_frame (event, false);
5224                                 framepos_t start = min (pos, start_at_start);
5225                                 framepos_t end = max (pos, end_at_start);
5226                                 _editor->selection->set (start, end);
5227                         }
5228                 } else {
5229                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5230                                 if (_editor->clicked_selection) {
5231                                         _editor->selection->remove (_editor->clicked_selection);
5232                                 }
5233                         } else {
5234                                 if (!_editor->clicked_selection) {
5235                                         _editor->selection->clear_time();
5236                                 }
5237                         }
5238                 }
5239
5240                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5241                         _editor->selection->set (_editor->clicked_axisview);
5242                 }
5243
5244                 if (s && s->get_play_range () && s->transport_rolling()) {
5245                         s->request_stop (false, false);
5246                 }
5247
5248         }
5249
5250         _editor->stop_canvas_autoscroll ();
5251         _editor->clicked_selection = 0;
5252         _editor->commit_reversible_selection_op ();
5253 }
5254
5255 void
5256 SelectionDrag::aborted (bool)
5257 {
5258         /* XXX: TODO */
5259 }
5260
5261 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5262         : Drag (e, i, false),
5263           _operation (o),
5264           _copy (false)
5265 {
5266         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5267
5268         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5269                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5270                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5271         _drag_rect->hide ();
5272
5273         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5274         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5275 }
5276
5277 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5278 {
5279         /* normal canvas items will be cleaned up when their parent group is deleted. But
5280            this item is created as the child of a long-lived parent group, and so we
5281            need to explicitly delete it.
5282         */
5283         delete _drag_rect;
5284 }
5285
5286 void
5287 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5288 {
5289         if (_editor->session() == 0) {
5290                 return;
5291         }
5292
5293         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5294
5295         if (!_editor->temp_location) {
5296                 _editor->temp_location = new Location (*_editor->session());
5297         }
5298
5299         switch (_operation) {
5300         case CreateSkipMarker:
5301         case CreateRangeMarker:
5302         case CreateTransportMarker:
5303         case CreateCDMarker:
5304
5305                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5306                         _copy = true;
5307                 } else {
5308                         _copy = false;
5309                 }
5310                 cursor = _editor->cursors()->selector;
5311                 break;
5312         }
5313
5314         Drag::start_grab (event, cursor);
5315
5316         show_verbose_cursor_time (adjusted_current_frame (event));
5317 }
5318
5319 void
5320 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5321 {
5322         framepos_t start = 0;
5323         framepos_t end = 0;
5324         ArdourCanvas::Rectangle *crect;
5325
5326         switch (_operation) {
5327         case CreateSkipMarker:
5328                 crect = _editor->range_bar_drag_rect;
5329                 break;
5330         case CreateRangeMarker:
5331                 crect = _editor->range_bar_drag_rect;
5332                 break;
5333         case CreateTransportMarker:
5334                 crect = _editor->transport_bar_drag_rect;
5335                 break;
5336         case CreateCDMarker:
5337                 crect = _editor->cd_marker_bar_drag_rect;
5338                 break;
5339         default:
5340                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5341                 return;
5342                 break;
5343         }
5344
5345         framepos_t const pf = adjusted_current_frame (event);
5346
5347         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5348                 framepos_t grab = grab_frame ();
5349                 _editor->snap_to (grab);
5350
5351                 if (pf < grab_frame()) {
5352                         start = pf;
5353                         end = grab;
5354                 } else {
5355                         end = pf;
5356                         start = grab;
5357                 }
5358
5359                 /* first drag: Either add to the selection
5360                    or create a new selection.
5361                 */
5362
5363                 if (first_move) {
5364
5365                         _editor->temp_location->set (start, end);
5366
5367                         crect->show ();
5368
5369                         update_item (_editor->temp_location);
5370                         _drag_rect->show();
5371                         //_drag_rect->raise_to_top();
5372
5373                 }
5374         }
5375
5376         if (start != end) {
5377                 _editor->temp_location->set (start, end);
5378
5379                 double x1 = _editor->sample_to_pixel (start);
5380                 double x2 = _editor->sample_to_pixel (end);
5381                 crect->set_x0 (x1);
5382                 crect->set_x1 (x2);
5383
5384                 update_item (_editor->temp_location);
5385         }
5386
5387         show_verbose_cursor_time (pf);
5388
5389 }
5390
5391 void
5392 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5393 {
5394         Location * newloc = 0;
5395         string rangename;
5396         int flags;
5397
5398         if (movement_occurred) {
5399                 motion (event, false);
5400                 _drag_rect->hide();
5401
5402                 switch (_operation) {
5403                 case CreateSkipMarker:
5404                 case CreateRangeMarker:
5405                 case CreateCDMarker:
5406                     {
5407                         XMLNode &before = _editor->session()->locations()->get_state();
5408                         if (_operation == CreateSkipMarker) {
5409                                 _editor->begin_reversible_command (_("new skip marker"));
5410                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5411                                 flags = Location::IsRangeMarker | Location::IsSkip;
5412                                 _editor->range_bar_drag_rect->hide();
5413                         } else if (_operation == CreateCDMarker) {
5414                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5415                                 _editor->begin_reversible_command (_("new CD marker"));
5416                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5417                                 _editor->cd_marker_bar_drag_rect->hide();
5418                         } else {
5419                                 _editor->begin_reversible_command (_("new skip marker"));
5420                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5421                                 flags = Location::IsRangeMarker;
5422                                 _editor->range_bar_drag_rect->hide();
5423                         }
5424                         newloc = new Location (
5425                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5426                                 );
5427
5428                         _editor->session()->locations()->add (newloc, true);
5429                         XMLNode &after = _editor->session()->locations()->get_state();
5430                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5431                         _editor->commit_reversible_command ();
5432                         break;
5433                     }
5434
5435                 case CreateTransportMarker:
5436                         // popup menu to pick loop or punch
5437                         _editor->new_transport_marker_context_menu (&event->button, _item);
5438                         break;
5439                 }
5440
5441         } else {
5442
5443                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5444
5445                 if (_operation == CreateTransportMarker) {
5446
5447                         /* didn't drag, so just locate */
5448
5449                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5450
5451                 } else if (_operation == CreateCDMarker) {
5452
5453                         /* didn't drag, but mark is already created so do
5454                          * nothing */
5455
5456                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5457
5458                         framepos_t start;
5459                         framepos_t end;
5460
5461                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5462
5463                         if (end == max_framepos) {
5464                                 end = _editor->session()->current_end_frame ();
5465                         }
5466
5467                         if (start == max_framepos) {
5468                                 start = _editor->session()->current_start_frame ();
5469                         }
5470
5471                         switch (_editor->mouse_mode) {
5472                         case MouseObject:
5473                                 /* find the two markers on either side and then make the selection from it */
5474                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5475                                 break;
5476
5477                         case MouseRange:
5478                                 /* find the two markers on either side of the click and make the range out of it */
5479                                 _editor->selection->set (start, end);
5480                                 break;
5481
5482                         default:
5483                                 break;
5484                         }
5485                 }
5486         }
5487
5488         _editor->stop_canvas_autoscroll ();
5489 }
5490
5491 void
5492 RangeMarkerBarDrag::aborted (bool movement_occurred)
5493 {
5494         if (movement_occurred) {
5495                 _drag_rect->hide ();
5496         }
5497 }
5498
5499 void
5500 RangeMarkerBarDrag::update_item (Location* location)
5501 {
5502         double const x1 = _editor->sample_to_pixel (location->start());
5503         double const x2 = _editor->sample_to_pixel (location->end());
5504
5505         _drag_rect->set_x0 (x1);
5506         _drag_rect->set_x1 (x2);
5507 }
5508
5509 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5510         : Drag (e, i)
5511         , _cumulative_dx (0)
5512         , _cumulative_dy (0)
5513         , _was_selected (false)
5514 {
5515         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5516
5517         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5518         assert (_primary);
5519         _region = &_primary->region_view ();
5520         _note_height = _region->midi_stream_view()->note_height ();
5521 }
5522
5523 void
5524 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5525 {
5526         Drag::start_grab (event);
5527         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5528
5529         if (!(_was_selected = _primary->selected())) {
5530
5531                 /* tertiary-click means extend selection - we'll do that on button release,
5532                    so don't add it here, because otherwise we make it hard to figure
5533                    out the "extend-to" range.
5534                 */
5535
5536                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5537
5538                 if (!extend) {
5539                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5540
5541                         if (add) {
5542                                 _region->note_selected (_primary, true);
5543                         } else {
5544                                 _editor->get_selection().clear_points();
5545                                 _region->unique_select (_primary);
5546                         }
5547                 }
5548         }
5549 }
5550
5551 /** @return Current total drag x change in frames */
5552 frameoffset_t
5553 NoteDrag::total_dx (const guint state) const
5554 {
5555         /* dx in frames */
5556         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5557
5558         /* primary note time */
5559         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5560
5561         /* new time of the primary note in session frames */
5562         frameoffset_t st = n + dx + snap_delta (state);
5563
5564         framepos_t const rp = _region->region()->position ();
5565
5566         /* prevent the note being dragged earlier than the region's position */
5567         st = max (st, rp);
5568
5569         /* possibly snap and return corresponding delta */
5570
5571         bool snap = true;
5572
5573         if (ArdourKeyboard::indicates_snap (state)) {
5574                 if (_editor->snap_mode () != SnapOff) {
5575                         snap = false;
5576                 }
5577         } else {
5578                 if (_editor->snap_mode () == SnapOff) {
5579                         snap = false;
5580                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5581                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5582                                 snap = true;
5583                         }
5584                 }
5585         }
5586
5587         frameoffset_t ret;
5588         if (snap) {
5589                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5590                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5591         } else {
5592                 ret = st - n - snap_delta (state);
5593         }
5594         return ret;
5595 }
5596
5597 /** @return Current total drag y change in note number */
5598 int8_t
5599 NoteDrag::total_dy () const
5600 {
5601         MidiStreamView* msv = _region->midi_stream_view ();
5602         double const y = _region->midi_view()->y_position ();
5603         /* new current note */
5604         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5605         /* clamp */
5606         n = max (msv->lowest_note(), n);
5607         n = min (msv->highest_note(), n);
5608         /* and work out delta */
5609         return n - msv->y_to_note (grab_y() - y);
5610 }
5611
5612 void
5613 NoteDrag::motion (GdkEvent * event, bool)
5614 {
5615         /* Total change in x and y since the start of the drag */
5616         frameoffset_t const dx = total_dx (event->button.state);
5617         int8_t const dy = total_dy ();
5618
5619         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5620         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5621         double const tdy = -dy * _note_height - _cumulative_dy;
5622
5623         if (tdx || tdy) {
5624                 _cumulative_dx += tdx;
5625                 _cumulative_dy += tdy;
5626
5627                 int8_t note_delta = total_dy();
5628
5629                 _region->move_selection (tdx, tdy, note_delta);
5630
5631                 /* the new note value may be the same as the old one, but we
5632                  * don't know what that means because the selection may have
5633                  * involved more than one note and we might be doing something
5634                  * odd with them. so show the note value anyway, always.
5635                  */
5636
5637                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5638
5639                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5640         }
5641 }
5642
5643 void
5644 NoteDrag::finished (GdkEvent* ev, bool moved)
5645 {
5646         if (!moved) {
5647                 /* no motion - select note */
5648
5649                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5650                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5651
5652                         bool changed = false;
5653
5654                         if (_was_selected) {
5655                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5656                                 if (add) {
5657                                         _region->note_deselected (_primary);
5658                                         changed = true;
5659                                 } else {
5660                                         _editor->get_selection().clear_points();
5661                                         _region->unique_select (_primary);
5662                                         changed = true;
5663                                 }
5664                         } else {
5665                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5666                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5667
5668                                 if (!extend && !add && _region->selection_size() > 1) {
5669                                         _editor->get_selection().clear_points();
5670                                         _region->unique_select (_primary);
5671                                         changed = true;
5672                                 } else if (extend) {
5673                                         _region->note_selected (_primary, true, true);
5674                                         changed = true;
5675                                 } else {
5676                                         /* it was added during button press */
5677                                         changed = true;
5678
5679                                 }
5680                         }
5681
5682                         if (changed) {
5683                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5684                                 _editor->commit_reversible_selection_op();
5685                         }
5686                 }
5687         } else {
5688                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5689         }
5690 }
5691
5692 void
5693 NoteDrag::aborted (bool)
5694 {
5695         /* XXX: TODO */
5696 }
5697
5698 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5699 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5700         : Drag (editor, atv->base_item ())
5701         , _ranges (r)
5702         , _y_origin (atv->y_position())
5703         , _nothing_to_drag (false)
5704 {
5705         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5706         setup (atv->lines ());
5707 }
5708
5709 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5710 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5711         : Drag (editor, rv->get_canvas_group ())
5712         , _ranges (r)
5713         , _y_origin (rv->get_time_axis_view().y_position())
5714         , _nothing_to_drag (false)
5715         , _integral (false)
5716 {
5717         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5718
5719         list<boost::shared_ptr<AutomationLine> > lines;
5720
5721         AudioRegionView*      audio_view;
5722         AutomationRegionView* automation_view;
5723         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5724                 lines.push_back (audio_view->get_gain_line ());
5725         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5726                 lines.push_back (automation_view->line ());
5727                 _integral = true;
5728         } else {
5729                 error << _("Automation range drag created for invalid region type") << endmsg;
5730         }
5731
5732         setup (lines);
5733 }
5734
5735 /** @param lines AutomationLines to drag.
5736  *  @param offset Offset from the session start to the points in the AutomationLines.
5737  */
5738 void
5739 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5740 {
5741         /* find the lines that overlap the ranges being dragged */
5742         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5743         while (i != lines.end ()) {
5744                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5745                 ++j;
5746
5747                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5748
5749                 /* check this range against all the AudioRanges that we are using */
5750                 list<AudioRange>::const_iterator k = _ranges.begin ();
5751                 while (k != _ranges.end()) {
5752                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5753                                 break;
5754                         }
5755                         ++k;
5756                 }
5757
5758                 /* add it to our list if it overlaps at all */
5759                 if (k != _ranges.end()) {
5760                         Line n;
5761                         n.line = *i;
5762                         n.state = 0;
5763                         n.range = r;
5764                         _lines.push_back (n);
5765                 }
5766
5767                 i = j;
5768         }
5769
5770         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5771 }
5772
5773 double
5774 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5775 {
5776         return 1.0 - ((global_y - _y_origin) / line->height());
5777 }
5778
5779 double
5780 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5781 {
5782         const double v = list->eval(x);
5783         return _integral ? rint(v) : v;
5784 }
5785
5786 void
5787 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5788 {
5789         Drag::start_grab (event, cursor);
5790
5791         /* Get line states before we start changing things */
5792         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5793                 i->state = &i->line->get_state ();
5794                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5795         }
5796
5797         if (_ranges.empty()) {
5798
5799                 /* No selected time ranges: drag all points */
5800                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5801                         uint32_t const N = i->line->npoints ();
5802                         for (uint32_t j = 0; j < N; ++j) {
5803                                 i->points.push_back (i->line->nth (j));
5804                         }
5805                 }
5806
5807         }
5808
5809         if (_nothing_to_drag) {
5810                 return;
5811         }
5812 }
5813
5814 void
5815 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5816 {
5817         if (_nothing_to_drag && !first_move) {
5818                 return;
5819         }
5820
5821         if (first_move) {
5822                 _editor->begin_reversible_command (_("automation range move"));
5823
5824                 if (!_ranges.empty()) {
5825
5826                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5827
5828                                 framecnt_t const half = (i->start + i->end) / 2;
5829
5830                                 /* find the line that this audio range starts in */
5831                                 list<Line>::iterator j = _lines.begin();
5832                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5833                                         ++j;
5834                                 }
5835
5836                                 if (j != _lines.end()) {
5837                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5838
5839                                 /* j is the line that this audio range starts in; fade into it;
5840                                    64 samples length plucked out of thin air.
5841                                 */
5842
5843                                         framepos_t a = i->start + 64;
5844                                         if (a > half) {
5845                                                 a = half;
5846                                         }
5847
5848                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5849                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5850
5851                                         XMLNode &before = the_list->get_state();
5852                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5853                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5854
5855                                         if (add_p || add_q) {
5856                                                 _editor->session()->add_command (
5857                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5858                                         }
5859                                 }
5860
5861                                 /* same thing for the end */
5862
5863                                 j = _lines.begin();
5864                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5865                                         ++j;
5866                                 }
5867
5868                                 if (j != _lines.end()) {
5869                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5870
5871                                         /* j is the line that this audio range starts in; fade out of it;
5872                                            64 samples length plucked out of thin air.
5873                                         */
5874
5875                                         framepos_t b = i->end - 64;
5876                                         if (b < half) {
5877                                                 b = half;
5878                                         }
5879
5880                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5881                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5882
5883                                         XMLNode &before = the_list->get_state();
5884                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5885                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5886
5887                                         if (add_p || add_q) {
5888                                                 _editor->session()->add_command (
5889                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5890                                         }
5891                                 }
5892                         }
5893
5894                         _nothing_to_drag = true;
5895
5896                         /* Find all the points that should be dragged and put them in the relevant
5897                            points lists in the Line structs.
5898                         */
5899
5900                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5901
5902                                 uint32_t const N = i->line->npoints ();
5903                                 for (uint32_t j = 0; j < N; ++j) {
5904
5905                                         /* here's a control point on this line */
5906                                         ControlPoint* p = i->line->nth (j);
5907                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5908
5909                                         /* see if it's inside a range */
5910                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5911                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5912                                                 ++k;
5913                                         }
5914
5915                                         if (k != _ranges.end()) {
5916                                                 /* dragging this point */
5917                                                 _nothing_to_drag = false;
5918                                                 i->points.push_back (p);
5919                                         }
5920                                 }
5921                         }
5922                 }
5923
5924                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5925                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5926                 }
5927         }
5928
5929         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5930                 float const f = y_fraction (l->line, current_pointer_y());
5931                 /* we are ignoring x position for this drag, so we can just pass in anything */
5932                 pair<double, float> result;
5933                 uint32_t ignored;
5934                 result = l->line->drag_motion (0, f, true, false, ignored);
5935                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5936         }
5937 }
5938
5939 void
5940 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5941 {
5942         if (_nothing_to_drag || !motion_occurred) {
5943                 return;
5944         }
5945
5946         motion (event, false);
5947         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5948                 i->line->end_drag (false, 0);
5949         }
5950
5951         _editor->commit_reversible_command ();
5952 }
5953
5954 void
5955 AutomationRangeDrag::aborted (bool)
5956 {
5957         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5958                 i->line->reset ();
5959         }
5960 }
5961
5962 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
5963         : view (v)
5964         , initial_time_axis_view (itav)
5965 {
5966         /* note that time_axis_view may be null if the regionview was created
5967          * as part of a copy operation.
5968          */
5969         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
5970         layer = v->region()->layer ();
5971         initial_y = v->get_canvas_group()->position().y;
5972         initial_playlist = v->region()->playlist ();
5973         initial_position = v->region()->position ();
5974         initial_end = v->region()->position () + v->region()->length ();
5975 }
5976
5977 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
5978         : Drag (e, i->canvas_item ())
5979         , _region_view (r)
5980         , _patch_change (i)
5981         , _cumulative_dx (0)
5982 {
5983         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
5984                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
5985                                                    grab_frame()));
5986 }
5987
5988 void
5989 PatchChangeDrag::motion (GdkEvent* ev, bool)
5990 {
5991         framepos_t f = adjusted_current_frame (ev);
5992         boost::shared_ptr<Region> r = _region_view->region ();
5993         f = max (f, r->position ());
5994         f = min (f, r->last_frame ());
5995
5996         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
5997         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
5998         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
5999         _cumulative_dx = dxu;
6000 }
6001
6002 void
6003 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6004 {
6005         if (!movement_occurred) {
6006                 return;
6007         }
6008
6009         boost::shared_ptr<Region> r (_region_view->region ());
6010         framepos_t f = adjusted_current_frame (ev);
6011         f = max (f, r->position ());
6012         f = min (f, r->last_frame ());
6013
6014         _region_view->move_patch_change (
6015                 *_patch_change,
6016                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6017                 );
6018 }
6019
6020 void
6021 PatchChangeDrag::aborted (bool)
6022 {
6023         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6024 }
6025
6026 void
6027 PatchChangeDrag::setup_pointer_frame_offset ()
6028 {
6029         boost::shared_ptr<Region> region = _region_view->region ();
6030         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6031 }
6032
6033 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6034         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6035         , _region_view (rv)
6036 {
6037
6038 }
6039
6040 void
6041 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6042 {
6043         _region_view->update_drag_selection (
6044                 x1, x2, y1, y2,
6045                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6046 }
6047
6048 void
6049 MidiRubberbandSelectDrag::deselect_things ()
6050 {
6051         /* XXX */
6052 }
6053
6054 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6055         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6056         , _region_view (rv)
6057 {
6058         _vertical_only = true;
6059 }
6060
6061 void
6062 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6063 {
6064         double const y = _region_view->midi_view()->y_position ();
6065
6066         y1 = max (0.0, y1 - y);
6067         y2 = max (0.0, y2 - y);
6068
6069         _region_view->update_vertical_drag_selection (
6070                 y1,
6071                 y2,
6072                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6073                 );
6074 }
6075
6076 void
6077 MidiVerticalSelectDrag::deselect_things ()
6078 {
6079         /* XXX */
6080 }
6081
6082 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6083         : RubberbandSelectDrag (e, i)
6084 {
6085
6086 }
6087
6088 void
6089 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6090 {
6091         if (drag_in_progress) {
6092                 /* We just want to select things at the end of the drag, not during it */
6093                 return;
6094         }
6095
6096         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6097
6098         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6099
6100         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6101
6102         _editor->commit_reversible_selection_op ();
6103 }
6104
6105 void
6106 EditorRubberbandSelectDrag::deselect_things ()
6107 {
6108         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6109
6110         _editor->selection->clear_tracks();
6111         _editor->selection->clear_regions();
6112         _editor->selection->clear_points ();
6113         _editor->selection->clear_lines ();
6114         _editor->selection->clear_midi_notes ();
6115
6116         _editor->commit_reversible_selection_op();
6117 }
6118
6119 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6120         : Drag (e, i)
6121         , _region_view (rv)
6122         , _drag_rect (0)
6123 {
6124         _note[0] = _note[1] = 0;
6125 }
6126
6127 NoteCreateDrag::~NoteCreateDrag ()
6128 {
6129         delete _drag_rect;
6130 }
6131
6132 framecnt_t
6133 NoteCreateDrag::grid_frames (framepos_t t) const
6134 {
6135         bool success;
6136         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6137         if (!success) {
6138                 grid_beats = Evoral::Beats(1);
6139         }
6140
6141         return _region_view->region_beats_to_region_frames (grid_beats);
6142 }
6143
6144 void
6145 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6146 {
6147         Drag::start_grab (event, cursor);
6148
6149         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6150
6151         framepos_t pf = _drags->current_pointer_frame ();
6152         framecnt_t const g = grid_frames (pf);
6153
6154         /* Hack so that we always snap to the note that we are over, instead of snapping
6155            to the next one if we're more than halfway through the one we're over.
6156         */
6157         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6158                 pf -= g / 2;
6159         }
6160
6161         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6162         _note[1] = _note[0];
6163
6164         MidiStreamView* sv = _region_view->midi_stream_view ();
6165         double const x = _editor->sample_to_pixel (_note[0]);
6166         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6167
6168         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6169         _drag_rect->set_outline_all ();
6170         _drag_rect->set_outline_color (0xffffff99);
6171         _drag_rect->set_fill_color (0xffffff66);
6172 }
6173
6174 void
6175 NoteCreateDrag::motion (GdkEvent* event, bool)
6176 {
6177         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6178         double const x0 = _editor->sample_to_pixel (_note[0]);
6179         double const x1 = _editor->sample_to_pixel (_note[1]);
6180         _drag_rect->set_x0 (std::min(x0, x1));
6181         _drag_rect->set_x1 (std::max(x0, x1));
6182 }
6183
6184 void
6185 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6186 {
6187         if (!had_movement) {
6188                 return;
6189         }
6190
6191         framepos_t const start = min (_note[0], _note[1]);
6192         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6193
6194         framecnt_t const g = grid_frames (start);
6195         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6196
6197         if (_editor->snap_mode() == SnapNormal && length < g) {
6198                 length = g;
6199         }
6200
6201         Evoral::Beats length_beats = max (
6202                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6203
6204         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6205 }
6206
6207 double
6208 NoteCreateDrag::y_to_region (double y) const
6209 {
6210         double x = 0;
6211         _region_view->get_canvas_group()->canvas_to_item (x, y);
6212         return y;
6213 }
6214
6215 void
6216 NoteCreateDrag::aborted (bool)
6217 {
6218
6219 }
6220
6221 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6222         : Drag (e, i)
6223         , arv (rv)
6224         , start (start_yn)
6225 {
6226         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6227 }
6228
6229 void
6230 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6231 {
6232         Drag::start_grab (event, cursor);
6233 }
6234
6235 void
6236 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6237 {
6238         double distance;
6239         double new_length;
6240         framecnt_t len;
6241
6242         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6243
6244         if (start) {
6245                 distance = _drags->current_pointer_x() - grab_x();
6246                 len = ar->fade_in()->back()->when;
6247         } else {
6248                 distance = grab_x() - _drags->current_pointer_x();
6249                 len = ar->fade_out()->back()->when;
6250         }
6251
6252         /* how long should it be ? */
6253
6254         new_length = len + _editor->pixel_to_sample (distance);
6255
6256         /* now check with the region that this is legal */
6257
6258         new_length = ar->verify_xfade_bounds (new_length, start);
6259
6260         if (start) {
6261                 arv->reset_fade_in_shape_width (ar, new_length);
6262         } else {
6263                 arv->reset_fade_out_shape_width (ar, new_length);
6264         }
6265 }
6266
6267 void
6268 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6269 {
6270         double distance;
6271         double new_length;
6272         framecnt_t len;
6273
6274         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6275
6276         if (start) {
6277                 distance = _drags->current_pointer_x() - grab_x();
6278                 len = ar->fade_in()->back()->when;
6279         } else {
6280                 distance = grab_x() - _drags->current_pointer_x();
6281                 len = ar->fade_out()->back()->when;
6282         }
6283
6284         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6285
6286         _editor->begin_reversible_command ("xfade trim");
6287         ar->playlist()->clear_owned_changes ();
6288
6289         if (start) {
6290                 ar->set_fade_in_length (new_length);
6291         } else {
6292                 ar->set_fade_out_length (new_length);
6293         }
6294
6295         /* Adjusting the xfade may affect other regions in the playlist, so we need
6296            to get undo Commands from the whole playlist rather than just the
6297            region.
6298         */
6299
6300         vector<Command*> cmds;
6301         ar->playlist()->rdiff (cmds);
6302         _editor->session()->add_commands (cmds);
6303         _editor->commit_reversible_command ();
6304
6305 }
6306
6307 void
6308 CrossfadeEdgeDrag::aborted (bool)
6309 {
6310         if (start) {
6311                 // arv->redraw_start_xfade ();
6312         } else {
6313                 // arv->redraw_end_xfade ();
6314         }
6315 }
6316
6317 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6318         : Drag (e, item, true)
6319         , line (new EditorCursor (*e))
6320 {
6321         line->set_position (pos);
6322         line->show ();
6323 }
6324
6325 RegionCutDrag::~RegionCutDrag ()
6326 {
6327         delete line;
6328 }
6329
6330 void
6331 RegionCutDrag::motion (GdkEvent*, bool)
6332 {
6333         framepos_t where = _drags->current_pointer_frame();
6334         _editor->snap_to (where);
6335
6336         line->set_position (where);
6337 }
6338
6339 void
6340 RegionCutDrag::finished (GdkEvent*, bool)
6341 {
6342         _editor->get_track_canvas()->canvas()->re_enter();
6343
6344         framepos_t pos = _drags->current_pointer_frame();
6345
6346         line->hide ();
6347
6348         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6349
6350         if (rs.empty()) {
6351                 return;
6352         }
6353
6354         _editor->split_regions_at (pos, rs);
6355 }
6356
6357 void
6358 RegionCutDrag::aborted (bool)
6359 {
6360 }