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 #define __STDC_LIMIT_MACROS 1
  21 #include <stdint.h>
  22 #include "pbd/memento_command.h"
  23 #include "pbd/basename.h"
  24 #include "pbd/stateful_diff_command.h"
  25 #include "ardour/session.h"
  26 #include "ardour/dB.h"
  27 #include "ardour/region_factory.h"
  28 #include "editor.h"
  29 #include "i18n.h"
  30 #include "keyboard.h"
  31 #include "audio_region_view.h"
  32 #include "midi_region_view.h"
  33 #include "ardour_ui.h"
  34 #include "gui_thread.h"
  35 #include "control_point.h"
  36 #include "utils.h"
  37 #include "region_gain_line.h"
  38 #include "editor_drag.h"
  39 #include "audio_time_axis.h"
  40 #include "midi_time_axis.h"
  41 #include "canvas-note.h"
  42 #include "selection.h"
  43 #include "midi_selection.h"
  44 #include "automation_time_axis.h"
  45
  46 using namespace std;
  47 using namespace ARDOUR;
  48 using namespace PBD;
  49 using namespace Gtk;
  50 using namespace Editing;
  51 using namespace ArdourCanvas;
  52
  53 using Gtkmm2ext::Keyboard;
  54
  55 double const ControlPointDrag::_zero_gain_fraction = gain_to_slider_position (dB_to_coefficient (0.0));
  56
  57 DragManager::DragManager (Editor* e)
  58         : _editor (e)
  59         , _ending (false)
  60         , _current_pointer_frame (0)
  61 {
  62
  63 }
  64
  65 DragManager::~DragManager ()
  66 {
  67         abort ();
  68 }
  69
  70 /** Call abort for each active drag */
  71 void
  72 DragManager::abort ()
  73 {
  74         _ending = true;
  75
  76         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
  77                 (*i)->abort ();
  78                 delete *i;
  79         }
  80
  81         _drags.clear ();
  82
  83         _ending = false;
  84 }
  85
  86 void
  87 DragManager::add (Drag* d)
  88 {
  89         d->set_manager (this);
  90         _drags.push_back (d);
  91 }
  92
  93 void
  94 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
  95 {
  96         assert (_drags.empty ());
  97         d->set_manager (this);
  98         _drags.push_back (d);
  99         start_grab (e);
 100 }
 101
 102 void
 103 DragManager::start_grab (GdkEvent* e)
 104 {
 105         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
 106
 107         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 108                 (*i)->start_grab (e);
 109         }
 110 }
 111
 112 /** Call end_grab for each active drag.
 113  *  @return true if any drag reported movement having occurred.
 114  */
 115 bool
 116 DragManager::end_grab (GdkEvent* e)
 117 {
 118         _ending = true;
 119
 120         bool r = false;
 121         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 122                 bool const t = (*i)->end_grab (e);
 123                 if (t) {
 124                         r = true;
 125                 }
 126                 delete *i;
 127         }
 128
 129         _drags.clear ();
 130
 131         _ending = false;
 132
 133         return r;
 134 }
 135
 136 bool
 137 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 138 {
 139         bool r = false;
 140
 141         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
 142
 143         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 144                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 145                 if (t) {
 146                         r = true;
 147                 }
 148
 149         }
 150
 151         return r;
 152 }
 153
 154 bool
 155 DragManager::have_item (ArdourCanvas::Item* i) const
 156 {
 157         list<Drag*>::const_iterator j = _drags.begin ();
 158         while (j != _drags.end() && (*j)->item () != i) {
 159                 ++j;
 160         }
 161
 162         return j != _drags.end ();
 163 }
 164
 165 Drag::Drag (Editor* e, ArdourCanvas::Item* i)
 166         : _editor (e)
 167         , _item (i)
 168         , _pointer_frame_offset (0)
 169         , _move_threshold_passed (false)
 170         , _grab_frame (0)
 171         , _last_pointer_frame (0)
 172 {
 173
 174 }
 175
 176 void
 177 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t time)
 178 {
 179         _item->ungrab (0);
 180         _item = new_item;
 181
 182         if (cursor == 0) {
 183                 cursor = _editor->which_grabber_cursor ();
 184         }
 185
 186         _item->grab (Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK, *cursor, time);
 187 }
 188
 189 void
 190 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 191 {
 192         if (cursor == 0) {
 193                 cursor = _editor->which_grabber_cursor ();
 194         }
 195
 196         // if dragging with button2, the motion is x constrained, with Alt-button2 it is y constrained
 197
 198         if (Keyboard::is_button2_event (&event->button)) {
 199                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::SecondaryModifier)) {
 200                         _y_constrained = true;
 201                         _x_constrained = false;
 202                 } else {
 203                         _y_constrained = false;
 204                         _x_constrained = true;
 205                 }
 206         } else {
 207                 _x_constrained = false;
 208                 _y_constrained = false;
 209         }
 210
 211         _grab_frame = _editor->event_frame (event, &_grab_x, &_grab_y);
 212         _grab_frame = adjusted_frame (_grab_frame, event);
 213         _last_pointer_frame = _grab_frame;
 214         _last_pointer_x = _grab_x;
 215         _last_pointer_y = _grab_y;
 216
 217         _item->grab (Gdk::POINTER_MOTION_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK,
 218                      *cursor,
 219                      event->button.time);
 220
 221         if (_editor->session() && _editor->session()->transport_rolling()) {
 222                 _was_rolling = true;
 223         } else {
 224                 _was_rolling = false;
 225         }
 226
 227         switch (_editor->snap_type()) {
 228         case SnapToRegionStart:
 229         case SnapToRegionEnd:
 230         case SnapToRegionSync:
 231         case SnapToRegionBoundary:
 232                 _editor->build_region_boundary_cache ();
 233                 break;
 234         default:
 235                 break;
 236         }
 237 }
 238
 239 /** Call to end a drag `successfully'.  Ungrabs item and calls
 240  *  subclass' finished() method.
 241  *
 242  *  @param event GDK event, or 0.
 243  *  @return true if some movement occurred, otherwise false.
 244  */
 245 bool
 246 Drag::end_grab (GdkEvent* event)
 247 {
 248         _editor->stop_canvas_autoscroll ();
 249
 250         _item->ungrab (event ? event->button.time : 0);
 251
 252         finished (event, _move_threshold_passed);
 253
 254         _editor->hide_verbose_canvas_cursor();
 255
 256         return _move_threshold_passed;
 257 }
 258
 259 nframes64_t
 260 Drag::adjusted_frame (nframes64_t f, GdkEvent const * event, bool snap) const
 261 {
 262         nframes64_t pos = 0;
 263
 264         if (f > _pointer_frame_offset) {
 265                 pos = f - _pointer_frame_offset;
 266         }
 267
 268         if (snap) {
 269                 _editor->snap_to_with_modifier (pos, event);
 270         }
 271
 272         return pos;
 273 }
 274
 275 nframes64_t
 276 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 277 {
 278         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 279 }
 280
 281 bool
 282 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 283 {
 284         /* check to see if we have moved in any way that matters since the last motion event */
 285         if ( (!x_movement_matters() || _last_pointer_frame == adjusted_current_frame (event)) &&
 286              (!y_movement_matters() || _last_pointer_y == _drags->current_pointer_y ()) ) {
 287                 return false;
 288         }
 289
 290         pair<nframes64_t, int> const threshold = move_threshold ();
 291
 292         bool const old_move_threshold_passed = _move_threshold_passed;
 293
 294         if (!from_autoscroll && !_move_threshold_passed) {
 295
 296                 bool const xp = (::llabs (adjusted_current_frame (event) - _grab_frame) >= threshold.first);
 297                 bool const yp = (::fabs ((_drags->current_pointer_y () - _grab_y)) >= threshold.second);
 298
 299                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 300         }
 301
 302         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 303
 304                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 305                         if (!from_autoscroll) {
 306                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll ());
 307                         }
 308
 309                         motion (event, _move_threshold_passed != old_move_threshold_passed);
 310
 311                         _last_pointer_x = _drags->current_pointer_x ();
 312                         _last_pointer_y = _drags->current_pointer_y ();
 313                         _last_pointer_frame = adjusted_current_frame (event);
 314
 315                         return true;
 316                 }
 317         }
 318         return false;
 319 }
 320
 321 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 322 void
 323 Drag::abort ()
 324 {
 325         if (_item) {
 326                 _item->ungrab (0);
 327         }
 328
 329         aborted ();
 330
 331         _editor->stop_canvas_autoscroll ();
 332         _editor->hide_verbose_canvas_cursor ();
 333 }
 334
 335 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 336         : Drag (e, i),
 337           _primary (p)
 338 {
 339         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 340                 _views.push_back (DraggingView (*i));
 341         }
 342
 343         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), ui_bind (&RegionDrag::region_going_away, this, _1), gui_context());
 344 }
 345
 346 void
 347 RegionDrag::region_going_away (RegionView* v)
 348 {
 349         list<DraggingView>::iterator i = _views.begin ();
 350         while (i != _views.end() && i->view != v) {
 351                 ++i;
 352         }
 353
 354         if (i != _views.end()) {
 355                 _views.erase (i);
 356         }
 357 }
 358
 359 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 360         : RegionDrag (e, i, p, v),
 361           _dest_trackview (0),
 362           _dest_layer (0),
 363           _brushing (b),
 364           _total_x_delta (0)
 365 {
 366
 367 }
 368
 369
 370 void
 371 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
 372 {
 373         Drag::start_grab (event);
 374
 375         _editor->show_verbose_time_cursor (_last_frame_position, 10);
 376 }
 377
 378 RegionMotionDrag::TimeAxisViewSummary
 379 RegionMotionDrag::get_time_axis_view_summary ()
 380 {
 381         int32_t children = 0;
 382         TimeAxisViewSummary sum;
 383
 384         _editor->visible_order_range (&sum.visible_y_low, &sum.visible_y_high);
 385
 386         /* get a bitmask representing the visible tracks */
 387
 388         for (TrackViewList::iterator i = _editor->track_views.begin(); i != _editor->track_views.end(); ++i) {
 389                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (*i);
 390                 TimeAxisView::Children children_list;
 391
 392                 /* zeroes are audio/MIDI tracks. ones are other types. */
 393
 394                 if (!rtv->hidden()) {
 395
 396                         if (!rtv->is_track()) {
 397                                 /* not an audio nor MIDI track */
 398                                 sum.tracks = sum.tracks |= (0x01 << rtv->order());
 399                         }
 400
 401                         sum.height_list[rtv->order()] = (*i)->current_height();
 402                         children = 1;
 403
 404                         if ((children_list = rtv->get_child_list()).size() > 0) {
 405                                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 406                                         sum.tracks = sum.tracks |= (0x01 << (rtv->order() + children));
 407                                         sum.height_list[rtv->order() + children] = (*j)->current_height();
 408                                         children++;
 409                                 }
 410                         }
 411                 }
 412         }
 413
 414         return sum;
 415 }
 416
 417 bool
 418 RegionMotionDrag::compute_y_delta (
 419         TimeAxisView const * last_pointer_view, TimeAxisView* current_pointer_view,
 420         int32_t last_pointer_layer, int32_t current_pointer_layer,
 421         TimeAxisViewSummary const & tavs,
 422         int32_t* pointer_order_span, int32_t* pointer_layer_span,
 423         int32_t* canvas_pointer_order_span
 424         )
 425 {
 426         if (_brushing) {
 427                 *pointer_order_span = 0;
 428                 *pointer_layer_span = 0;
 429                 return true;
 430         }
 431
 432         bool clamp_y_axis = false;
 433
 434         /* the change in track order between this callback and the last */
 435         *pointer_order_span = last_pointer_view->order() - current_pointer_view->order();
 436         /* the change in layer between this callback and the last;
 437            only meaningful if pointer_order_span == 0 (ie we've not moved tracks) */
 438         *pointer_layer_span = last_pointer_layer - current_pointer_layer;
 439
 440         if (*pointer_order_span != 0) {
 441
 442                 /* find the actual pointer span, in terms of the number of visible tracks;
 443                    to do this, we reduce |pointer_order_span| by the number of hidden tracks
 444                    over the span */
 445
 446                 *canvas_pointer_order_span = *pointer_order_span;
 447                 if (last_pointer_view->order() >= current_pointer_view->order()) {
 448                         for (int32_t y = current_pointer_view->order(); y < last_pointer_view->order(); y++) {
 449                                 if (tavs.height_list[y] == 0) {
 450                                         *canvas_pointer_order_span--;
 451                                 }
 452                         }
 453                 } else {
 454                         for (int32_t y = last_pointer_view->order(); y <= current_pointer_view->order(); y++) {
 455                                 if (tavs.height_list[y] == 0) {
 456                                         *canvas_pointer_order_span++;
 457                                 }
 458                         }
 459                 }
 460
 461                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 462
 463                         RegionView* rv = i->view;
 464
 465                         if (rv->region()->locked()) {
 466                                 continue;
 467                         }
 468
 469                         double ix1, ix2, iy1, iy2;
 470                         rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
 471                         rv->get_canvas_frame()->i2w (ix1, iy1);
 472                         iy1 += _editor->vertical_adjustment.get_value() - _editor->canvas_timebars_vsize;
 473
 474                         /* get the new trackview for this particular region */
 475                         pair<TimeAxisView*, int> const tvp = _editor->trackview_by_y_position (iy1);
 476                         assert (tvp.first);
 477                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
 478
 479                         /* XXX: not sure that we should be passing canvas_pointer_order_span in here,
 480                            as surely this is a per-region thing... */
 481
 482                         clamp_y_axis = y_movement_disallowed (
 483                                 rtv->order(), last_pointer_view->order(), *canvas_pointer_order_span, tavs
 484                                 );
 485
 486                         if (clamp_y_axis) {
 487                                 break;
 488                         }
 489                 }
 490
 491         } else if (_dest_trackview == current_pointer_view) {
 492
 493                 if (current_pointer_layer == last_pointer_layer) {
 494                         /* No movement; clamp */
 495                         clamp_y_axis = true;
 496                 }
 497         }
 498
 499         if (!clamp_y_axis) {
 500                 _dest_trackview = current_pointer_view;
 501                 _dest_layer = current_pointer_layer;
 502         }
 503
 504         return clamp_y_axis;
 505 }
 506
 507
 508 double
 509 RegionMotionDrag::compute_x_delta (GdkEvent const * event, nframes64_t* pending_region_position)
 510 {
 511         /* compute the amount of pointer motion in frames, and where
 512            the region would be if we moved it by that much.
 513         */
 514         *pending_region_position = adjusted_current_frame (event);
 515
 516         nframes64_t sync_frame;
 517         nframes64_t sync_offset;
 518         int32_t sync_dir;
 519
 520         sync_offset = _primary->region()->sync_offset (sync_dir);
 521
 522         /* we don't handle a sync point that lies before zero.
 523          */
 524         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 525
 526                 sync_frame = *pending_region_position + (sync_dir*sync_offset);
 527
 528                 _editor->snap_to_with_modifier (sync_frame, event);
 529
 530                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame);
 531
 532         } else {
 533                 *pending_region_position = _last_frame_position;
 534         }
 535
 536         if (*pending_region_position > max_frames - _primary->region()->length()) {
 537                 *pending_region_position = _last_frame_position;
 538         }
 539
 540         double x_delta = 0;
 541
 542         if ((*pending_region_position != _last_frame_position) && x_move_allowed ()) {
 543
 544                 /* now compute the canvas unit distance we need to move the regionview
 545                    to make it appear at the new location.
 546                 */
 547
 548                 x_delta = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->frames_per_unit;
 549
 550                 if (*pending_region_position <= _last_frame_position) {
 551
 552                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 553
 554                                 RegionView* rv = i->view;
 555
 556                                 // If any regionview is at zero, we need to know so we can stop further leftward motion.
 557
 558                                 double ix1, ix2, iy1, iy2;
 559                                 rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
 560                                 rv->get_canvas_frame()->i2w (ix1, iy1);
 561
 562                                 if (-x_delta > ix1 + _editor->horizontal_position()) {
 563                                         x_delta = 0;
 564                                         *pending_region_position = _last_frame_position;
 565                                         break;
 566                                 }
 567                         }
 568
 569                 }
 570
 571                 _last_frame_position = *pending_region_position;
 572         }
 573
 574         return x_delta;
 575 }
 576
 577 void
 578 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 579 {
 580         double y_delta = 0;
 581
 582         TimeAxisViewSummary tavs = get_time_axis_view_summary ();
 583
 584         vector<int32_t>::iterator j;
 585
 586         /* *pointer* variables reflect things about the pointer; as we may be moving
 587            multiple regions, much detail must be computed per-region */
 588
 589         /* current_pointer_view will become the TimeAxisView that we're currently pointing at, and
 590            current_pointer_layer the current layer on that TimeAxisView; in this code layer numbers
 591            are with respect to how the view's layers are displayed; if we are in Overlaid mode, layer
 592            is always 0 regardless of what the region's "real" layer is */
 593         RouteTimeAxisView* current_pointer_view;
 594         layer_t current_pointer_layer;
 595         if (!check_possible (&current_pointer_view, &current_pointer_layer)) {
 596                 return;
 597         }
 598
 599         /* TimeAxisView that we were pointing at last time we entered this method */
 600         TimeAxisView const * const last_pointer_view = _dest_trackview;
 601         /* the order of the track that we were pointing at last time we entered this method */
 602         int32_t const last_pointer_order = last_pointer_view->order ();
 603         /* the layer that we were pointing at last time we entered this method */
 604         layer_t const last_pointer_layer = _dest_layer;
 605
 606         int32_t pointer_order_span;
 607         int32_t pointer_layer_span;
 608         int32_t canvas_pointer_order_span;
 609
 610         bool const clamp_y_axis = compute_y_delta (
 611                 last_pointer_view, current_pointer_view,
 612                 last_pointer_layer, current_pointer_layer, tavs,
 613                 &pointer_order_span, &pointer_layer_span,
 614                 &canvas_pointer_order_span
 615                 );
 616
 617         nframes64_t pending_region_position;
 618         double const x_delta = compute_x_delta (event, &pending_region_position);
 619
 620         /*************************************************************
 621             PREPARE TO MOVE
 622         ************************************************************/
 623
 624         if (x_delta == 0 && pointer_order_span == 0 && pointer_layer_span == 0 && !first_move) {
 625                 /* haven't reached next snap point, and we're not switching
 626                    trackviews nor layers. nothing to do.
 627                 */
 628                 return;
 629         }
 630
 631         /*************************************************************
 632             MOTION
 633         ************************************************************/
 634
 635         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
 636
 637         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 638
 639                 RegionView* rv = i->view;
 640
 641                 if (rv->region()->locked()) {
 642                         continue;
 643                 }
 644
 645                 /* here we are calculating the y distance from the
 646                    top of the first track view to the top of the region
 647                    area of the track view that we're working on */
 648
 649                 /* this x value is just a dummy value so that we have something
 650                    to pass to i2w () */
 651
 652                 double ix1 = 0;
 653
 654                 /* distance from the top of this track view to the region area
 655                    of our track view is always 1 */
 656
 657                 double iy1 = 1;
 658
 659                 /* convert to world coordinates, ie distance from the top of
 660                    the ruler section */
 661
 662                 rv->get_canvas_frame()->i2w (ix1, iy1);
 663
 664                 /* compensate for the ruler section and the vertical scrollbar position */
 665                 iy1 += _editor->get_trackview_group_vertical_offset ();
 666
 667                 if (first_move) {
 668
 669                         // hide any dependent views
 670
 671                         rv->get_time_axis_view().hide_dependent_views (*rv);
 672
 673                         /*
 674                            reparent to a non scrolling group so that we can keep the
 675                            region selection above all time axis views.
 676                            reparenting means we have to move the rv as the two
 677                            parent groups have different coordinates.
 678                         */
 679
 680                         rv->get_canvas_group()->property_y() = iy1 - 1;
 681                         rv->get_canvas_group()->reparent(*(_editor->_region_motion_group));
 682
 683                         rv->fake_set_opaque (true);
 684                 }
 685
 686                 /* current view for this particular region */
 687                 pair<TimeAxisView*, int> pos = _editor->trackview_by_y_position (iy1);
 688                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (pos.first);
 689
 690                 if (pointer_order_span != 0 && !clamp_y_axis) {
 691
 692                         /* INTER-TRACK MOVEMENT */
 693
 694                         /* move through the height list to the track that the region is currently on */
 695                         vector<int32_t>::iterator j = tavs.height_list.begin ();
 696                         int32_t x = 0;
 697                         while (j != tavs.height_list.end () && x != rtv->order ()) {
 698                                 ++x;
 699                                 ++j;
 700                         }
 701
 702                         y_delta = 0;
 703                         int32_t temp_pointer_order_span = canvas_pointer_order_span;
 704
 705                         if (j != tavs.height_list.end ()) {
 706
 707                                 /* Account for layers in the original and
 708                                    destination tracks.  If we're moving around in layers we assume
 709                                    that only one track is involved, so it's ok to use *pointer*
 710                                    variables here. */
 711
 712                                 StreamView* lv = last_pointer_view->view ();
 713                                 assert (lv);
 714
 715                                 /* move to the top of the last trackview */
 716                                 if (lv->layer_display () == Stacked) {
 717                                         y_delta -= (lv->layers() - last_pointer_layer - 1) * lv->child_height ();
 718                                 }
 719
 720                                 StreamView* cv = current_pointer_view->view ();
 721                                 assert (cv);
 722
 723                                 /* move to the right layer on the current trackview */
 724                                 if (cv->layer_display () == Stacked) {
 725                                         y_delta += (cv->layers() - current_pointer_layer - 1) * cv->child_height ();
 726                                 }
 727
 728                                 /* And for being on a non-topmost layer on the new
 729                                    track */
 730
 731                                 while (temp_pointer_order_span > 0) {
 732                                         /* we're moving up canvas-wise,
 733                                            so we need to find the next track height
 734                                         */
 735                                         if (j != tavs.height_list.begin()) {
 736                                                 j--;
 737                                         }
 738
 739                                         if (x != last_pointer_order) {
 740                                                 if ((*j) == 0) {
 741                                                         ++temp_pointer_order_span;
 742                                                 }
 743                                         }
 744
 745                                         y_delta -= (*j);
 746                                         temp_pointer_order_span--;
 747                                 }
 748
 749                                 while (temp_pointer_order_span < 0) {
 750
 751                                         y_delta += (*j);
 752
 753                                         if (x != last_pointer_order) {
 754                                                 if ((*j) == 0) {
 755                                                         --temp_pointer_order_span;
 756                                                 }
 757                                         }
 758
 759                                         if (j != tavs.height_list.end()) {
 760                                                 j++;
 761                                         }
 762
 763                                         temp_pointer_order_span++;
 764                                 }
 765
 766
 767                                 /* find out where we'll be when we move and set height accordingly */
 768
 769                                 pair<TimeAxisView*, int> const pos = _editor->trackview_by_y_position (iy1 + y_delta);
 770                                 RouteTimeAxisView const * temp_rtv = dynamic_cast<RouteTimeAxisView*> (pos.first);
 771                                 rv->set_height (temp_rtv->view()->child_height());
 772
 773                                 /* if you un-comment the following, the region colours will follow
 774                                    the track colours whilst dragging; personally
 775                                    i think this can confuse things, but never mind.
 776                                 */
 777
 778                                 //const GdkColor& col (temp_rtv->view->get_region_color());
 779                                 //rv->set_color (const_cast<GdkColor&>(col));
 780                         }
 781                 }
 782
 783                 if (pointer_order_span == 0 && pointer_layer_span != 0 && !clamp_y_axis) {
 784
 785                         /* INTER-LAYER MOVEMENT in the same track */
 786                         y_delta = rtv->view()->child_height () * pointer_layer_span;
 787                 }
 788
 789
 790                 if (_brushing) {
 791                         _editor->mouse_brush_insert_region (rv, pending_region_position);
 792                 } else {
 793                         rv->move (x_delta, y_delta);
 794                 }
 795
 796         } /* foreach region */
 797
 798         _total_x_delta += x_delta;
 799
 800         if (first_move) {
 801                 _editor->cursor_group->raise_to_top();
 802         }
 803
 804         if (x_delta != 0 && !_brushing) {
 805                 _editor->show_verbose_time_cursor (_last_frame_position, 10);
 806         }
 807 }
 808
 809 void
 810 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
 811 {
 812         if (_copy && first_move) {
 813                 copy_regions (event);
 814         }
 815
 816         RegionMotionDrag::motion (event, first_move);
 817 }
 818
 819 void
 820 RegionMoveDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
 821 {
 822         vector<RegionView*> copies;
 823         boost::shared_ptr<Track> tr;
 824         boost::shared_ptr<Playlist> from_playlist;
 825         boost::shared_ptr<Playlist> to_playlist;
 826         RegionSelection new_views;
 827         typedef set<boost::shared_ptr<Playlist> > PlaylistSet;
 828         PlaylistSet modified_playlists;
 829         PlaylistSet frozen_playlists;
 830         list <sigc::connection> modified_playlist_connections;
 831         pair<PlaylistSet::iterator,bool> insert_result, frozen_insert_result;
 832         nframes64_t drag_delta;
 833         bool changed_tracks, changed_position;
 834         map<RegionView*, pair<RouteTimeAxisView*, int> > final;
 835         RouteTimeAxisView* source_tv;
 836         vector<StatefulDiffCommand*> sdc;
 837
 838         if (!movement_occurred) {
 839                 /* just a click */
 840                 return;
 841         }
 842
 843         if (_brushing) {
 844                 /* all changes were made during motion event handlers */
 845
 846                 if (_copy) {
 847                         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
 848                                 copies.push_back (i->view);
 849                         }
 850                 }
 851
 852                 goto out;
 853         }
 854
 855         /* reverse this here so that we have the correct logic to finalize
 856            the drag.
 857         */
 858
 859         if (Config->get_edit_mode() == Lock) {
 860                 _x_constrained = !_x_constrained;
 861         }
 862
 863         if (_copy) {
 864                 if (_x_constrained) {
 865                         _editor->begin_reversible_command (_("fixed time region copy"));
 866                 } else {
 867                         _editor->begin_reversible_command (_("region copy"));
 868                 }
 869         } else {
 870                 if (_x_constrained) {
 871                         _editor->begin_reversible_command (_("fixed time region drag"));
 872                 } else {
 873                         _editor->begin_reversible_command (_("region drag"));
 874                 }
 875         }
 876
 877         changed_position = (_last_frame_position != (nframes64_t) (_primary->region()->position()));
 878         changed_tracks = (_dest_trackview != &_primary->get_time_axis_view());
 879
 880         drag_delta = _primary->region()->position() - _last_frame_position;
 881
 882         _editor->update_canvas_now ();
 883
 884         /* make a list of where each region ended up */
 885         final = find_time_axis_views_and_layers ();
 886
 887         cerr << "Iterate over " << _views.size() << " views\n";
 888
 889         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
 890
 891                 RegionView* rv = i->view;
 892                 RouteTimeAxisView* dest_rtv = final[rv].first;
 893                 layer_t dest_layer = final[rv].second;
 894
 895                 nframes64_t where;
 896
 897                 from_playlist.reset ();
 898                 to_playlist.reset ();
 899
 900                 if (rv->region()->locked()) {
 901                         ++i;
 902                         continue;
 903                 }
 904
 905                 if (changed_position && !_x_constrained) {
 906                         where = rv->region()->position() - drag_delta;
 907                 } else {
 908                         where = rv->region()->position();
 909                 }
 910
 911                 boost::shared_ptr<Region> new_region;
 912
 913                 if (_copy) {
 914                         /* we already made a copy */
 915                         new_region = rv->region();
 916
 917                         /* undo the previous hide_dependent_views so that xfades don't
 918                            disappear on copying regions
 919                         */
 920
 921                         //rv->get_time_axis_view().reveal_dependent_views (*rv);
 922
 923                 } else if (changed_tracks && dest_rtv->playlist()) {
 924                         new_region = RegionFactory::create (rv->region());
 925                 }
 926
 927                 if (changed_tracks || _copy) {
 928
 929                         to_playlist = dest_rtv->playlist();
 930
 931                         if (!to_playlist) {
 932                                 ++i;
 933                                 continue;
 934                         }
 935
 936                         _editor->latest_regionviews.clear ();
 937
 938                         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun(*_editor, &Editor::collect_new_region_view));
 939
 940                         insert_result = modified_playlists.insert (to_playlist);
 941
 942                         if (insert_result.second) {
 943                                 to_playlist->clear_history ();
 944                         }
 945
 946                         cerr << "To playlist " << to_playlist->name() << " region history contains "
 947                              << to_playlist->region_list().change().added.size() << " adds and "
 948                              << to_playlist->region_list().change().removed.size() << " removes\n";
 949
 950                         cerr << "Adding new region " << new_region->id() << " based on "
 951                              << rv->region()->id() << endl;
 952
 953                         to_playlist->add_region (new_region, where);
 954
 955                         if (dest_rtv->view()->layer_display() == Stacked) {
 956                                 new_region->set_layer (dest_layer);
 957                                 new_region->set_pending_explicit_relayer (true);
 958                         }
 959
 960                         c.disconnect ();
 961
 962                         if (!_editor->latest_regionviews.empty()) {
 963                                 // XXX why just the first one ? we only expect one
 964                                 // commented out in nick_m's canvas reworking. is that intended?
 965                                 //dest_atv->reveal_dependent_views (*latest_regionviews.front());
 966                                 new_views.push_back (_editor->latest_regionviews.front());
 967                         }
 968
 969                 } else {
 970                         rv->region()->clear_history ();
 971
 972                         /*
 973                            motion on the same track. plonk the previously reparented region
 974                            back to its original canvas group (its streamview).
 975                            No need to do anything for copies as they are fake regions which will be deleted.
 976                         */
 977
 978                         rv->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
 979                         rv->get_canvas_group()->property_y() = i->initial_y;
 980                         rv->get_time_axis_view().reveal_dependent_views (*rv);
 981
 982                         /* just change the model */
 983
 984                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
 985
 986                         if (dest_rtv->view()->layer_display() == Stacked) {
 987                                 rv->region()->set_layer (dest_layer);
 988                                 rv->region()->set_pending_explicit_relayer (true);
 989                         }
 990
 991                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
 992
 993                         frozen_insert_result = frozen_playlists.insert(playlist);
 994
 995                         if (frozen_insert_result.second) {
 996                                 playlist->freeze();
 997                         }
 998
 999                         cerr << "Moving region " << rv->region()->id() << endl;
1000
1001                         rv->region()->set_position (where, (void*) this);
1002
1003                         sdc.push_back (new StatefulDiffCommand (rv->region()));
1004                 }
1005
1006                 if (changed_tracks && !_copy) {
1007
1008                         /* get the playlist where this drag started. we can't use rv->region()->playlist()
1009                            because we may have copied the region and it has not been attached to a playlist.
1010                         */
1011
1012                         source_tv = dynamic_cast<RouteTimeAxisView*> (&rv->get_time_axis_view());
1013                         tr = source_tv->track();
1014                         from_playlist = tr->playlist();
1015
1016                         assert (source_tv);
1017                         assert (tr);
1018                         assert (from_playlist);
1019
1020                         /* moved to a different audio track, without copying */
1021
1022                         /* the region that used to be in the old playlist is not
1023                            moved to the new one - we use a copy of it. as a result,
1024                            any existing editor for the region should no longer be
1025                            visible.
1026                         */
1027
1028                         rv->hide_region_editor();
1029                         rv->fake_set_opaque (false);
1030
1031                         /* remove the region from the old playlist */
1032
1033                         insert_result = modified_playlists.insert (from_playlist);
1034
1035                         if (insert_result.second) {
1036                                 from_playlist->clear_history ();
1037                         }
1038
1039                         cerr << "From playlist " << from_playlist->name() << " region history contains "
1040                              << from_playlist->region_list().change().added.size() << " adds and "
1041                              << from_playlist->region_list().change().removed.size() << " removes\n";
1042
1043                         cerr << "removing region " << rv->region() << endl;
1044
1045                         from_playlist->remove_region (rv->region());
1046
1047                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1048                            was selected in all of them, then removing it from a playlist will have removed all
1049                            trace of it from the selection (i.e. there were N regions selected, we removed 1,
1050                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1051                            corresponding regionview, and the selection is now empty).
1052
1053                            this could have invalidated any and all iterators into the region selection.
1054
1055                            the heuristic we use here is: if the region selection is empty, break out of the loop
1056                            here. if the region selection is not empty, then restart the loop because we know that
1057                            we must have removed at least the region(view) we've just been working on as well as any
1058                            that we processed on previous iterations.
1059
1060                            EXCEPT .... if we are doing a copy drag, then the selection hasn't been modified and
1061                            we can just iterate.
1062                         */
1063
1064                         if (_views.empty()) {
1065                                 if (to_playlist) {
1066                                         sdc.push_back (new StatefulDiffCommand (to_playlist));
1067                                         cerr << "Saved diff for to:" << to_playlist->name() << endl;
1068                                 }
1069
1070                                 if (from_playlist && (from_playlist != to_playlist)) {
1071                                         sdc.push_back (new StatefulDiffCommand (from_playlist));
1072                                         cerr << "Saved diff for from:" << from_playlist->name() << endl;
1073                                 }
1074                                 break;
1075                         } else {
1076                                 i = _views.begin();
1077                         }
1078
1079                 } else {
1080                         ++i;
1081                 }
1082
1083                 if (_copy) {
1084                         copies.push_back (rv);
1085                 }
1086
1087                 cerr << "Done with TV, top = " << to_playlist << " from = " << from_playlist << endl;
1088
1089                 if (to_playlist) {
1090                         sdc.push_back (new StatefulDiffCommand (to_playlist));
1091                         cerr << "Saved diff for to:" << to_playlist->name() << endl;
1092                 }
1093
1094                 if (from_playlist && (from_playlist != to_playlist)) {
1095                         sdc.push_back (new StatefulDiffCommand (from_playlist));
1096                         cerr << "Saved diff for from:" << from_playlist->name() << endl;
1097                 }
1098         }
1099
1100         /*
1101            if we've created new regions either by copying or moving
1102            to a new track, we want to replace the old selection with the new ones
1103         */
1104
1105         if (new_views.size() > 0) {
1106                 _editor->selection->set (new_views);
1107         }
1108
1109         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1110                 (*p)->thaw();
1111         }
1112
1113   out:
1114         for (vector<StatefulDiffCommand*>::iterator i = sdc.begin(); i != sdc.end(); ++i) {
1115                 _editor->session()->add_command (*i);
1116         }
1117
1118         _editor->commit_reversible_command ();
1119
1120         for (vector<RegionView*>::iterator x = copies.begin(); x != copies.end(); ++x) {
1121                 delete *x;
1122         }
1123 }
1124
1125 void
1126 RegionMoveDrag::aborted ()
1127 {
1128         if (_copy) {
1129
1130                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1131                         delete i->view;
1132                 }
1133
1134                 _views.clear ();
1135
1136         } else {
1137                 RegionMotionDrag::aborted ();
1138         }
1139 }
1140
1141 void
1142 RegionMotionDrag::aborted ()
1143 {
1144         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1145                 RegionView* rv = i->view;
1146                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1147                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1148                 assert (rtv);
1149                 rv->get_canvas_group()->reparent (*rtv->view()->canvas_item());
1150                 rv->get_canvas_group()->property_y() = 0;
1151                 rv->get_time_axis_view().reveal_dependent_views (*rv);
1152                 rv->fake_set_opaque (false);
1153                 rv->move (-_total_x_delta, 0);
1154                 rv->set_height (rtv->view()->child_height ());
1155         }
1156
1157         _editor->update_canvas_now ();
1158 }
1159
1160
1161 bool
1162 RegionMotionDrag::x_move_allowed () const
1163 {
1164         if (Config->get_edit_mode() == Lock) {
1165                 /* in locked edit mode, reverse the usual meaning of _x_constrained */
1166                 return _x_constrained;
1167         }
1168
1169         return !_x_constrained;
1170 }
1171
1172 void
1173 RegionMotionDrag::copy_regions (GdkEvent* event)
1174 {
1175         /* duplicate the regionview(s) and region(s) */
1176
1177         list<DraggingView> new_regionviews;
1178
1179         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1180
1181                 RegionView* rv = i->view;
1182                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1183                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1184
1185                 const boost::shared_ptr<const Region> original = rv->region();
1186                 boost::shared_ptr<Region> region_copy = RegionFactory::create (original);
1187                 region_copy->set_position (original->position(), this);
1188
1189                 RegionView* nrv;
1190                 if (arv) {
1191                         boost::shared_ptr<AudioRegion> audioregion_copy
1192                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1193
1194                         nrv = new AudioRegionView (*arv, audioregion_copy);
1195                 } else if (mrv) {
1196                         boost::shared_ptr<MidiRegion> midiregion_copy
1197                                 = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1198                         nrv = new MidiRegionView (*mrv, midiregion_copy);
1199                 } else {
1200                         continue;
1201                 }
1202
1203                 nrv->get_canvas_group()->show ();
1204                 new_regionviews.push_back (DraggingView (nrv));
1205
1206                 /* swap _primary to the copy */
1207
1208                 if (rv == _primary) {
1209                         _primary = nrv;
1210                 }
1211
1212                 /* ..and deselect the one we copied */
1213
1214                 rv->set_selected (false);
1215         }
1216
1217         if (new_regionviews.empty()) {
1218                 return;
1219         }
1220
1221         /* reflect the fact that we are dragging the copies */
1222
1223         _views = new_regionviews;
1224
1225         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1226
1227         /*
1228            sync the canvas to what we think is its current state
1229            without it, the canvas seems to
1230            "forget" to update properly after the upcoming reparent()
1231            ..only if the mouse is in rapid motion at the time of the grab.
1232            something to do with regionview creation taking so long?
1233         */
1234         _editor->update_canvas_now();
1235 }
1236
1237 bool
1238 RegionMotionDrag::check_possible (RouteTimeAxisView** tv, layer_t* layer)
1239 {
1240         /* Which trackview is this ? */
1241
1242         pair<TimeAxisView*, int> const tvp = _editor->trackview_by_y_position (_drags->current_pointer_y ());
1243         (*tv) = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1244         (*layer) = tvp.second;
1245
1246         if (*tv && (*tv)->layer_display() == Overlaid) {
1247                 *layer = 0;
1248         }
1249
1250         /* The region motion is only processed if the pointer is over
1251            an audio track.
1252         */
1253
1254         if (!(*tv) || !(*tv)->is_track()) {
1255                 /* To make sure we hide the verbose canvas cursor when the mouse is
1256                    not held over and audiotrack.
1257                 */
1258                 _editor->hide_verbose_canvas_cursor ();
1259                 return false;
1260         }
1261
1262         return true;
1263 }
1264
1265 /** @param new_order New track order.
1266  *  @param old_order Old track order.
1267  *  @param visible_y_low Lowest visible order.
1268  *  @return true if y movement should not happen, otherwise false.
1269  */
1270 bool
1271 RegionMotionDrag::y_movement_disallowed (int new_order, int old_order, int y_span, TimeAxisViewSummary const & tavs) const
1272 {
1273         if (new_order != old_order) {
1274
1275                 /* this isn't the pointer track */
1276
1277                 if (y_span > 0) {
1278
1279                         /* moving up the canvas */
1280                         if ( (new_order - y_span) >= tavs.visible_y_low) {
1281
1282                                 int32_t n = 0;
1283
1284                                 /* work out where we'll end up with this y span, taking hidden TimeAxisViews into account */
1285                                 int32_t visible_tracks = 0;
1286                                 while (visible_tracks < y_span ) {
1287                                         visible_tracks++;
1288                                         while (tavs.height_list[new_order - (visible_tracks - n)] == 0) {
1289                                                 /* passing through a hidden track */
1290                                                 n--;
1291                                         }
1292                                 }
1293
1294                                 if (tavs.tracks[new_order - (y_span - n)] != 0x00) {
1295                                         /* moving to a non-track; disallow */
1296                                         return true;
1297                                 }
1298
1299
1300                         } else {
1301                                 /* moving beyond the lowest visible track; disallow */
1302                                 return true;
1303                         }
1304
1305                 } else if (y_span < 0) {
1306
1307                         /* moving down the canvas */
1308                         if ((new_order - y_span) <= tavs.visible_y_high) {
1309
1310                                 int32_t visible_tracks = 0;
1311                                 int32_t n = 0;
1312                                 while (visible_tracks > y_span ) {
1313                                         visible_tracks--;
1314
1315                                         while (tavs.height_list[new_order - (visible_tracks - n)] == 0) {
1316                                                 /* passing through a hidden track */
1317                                                 n++;
1318                                         }
1319                                 }
1320
1321                                 if (tavs.tracks[new_order - (y_span - n)] != 0x00) {
1322                                         /* moving to a non-track; disallow */
1323                                         return true;
1324                                 }
1325
1326
1327                         } else {
1328
1329                                 /* moving beyond the highest visible track; disallow */
1330                                 return true;
1331                         }
1332                 }
1333
1334         } else {
1335
1336                 /* this is the pointer's track */
1337
1338                 if ((new_order - y_span) > tavs.visible_y_high) {
1339                         /* we will overflow */
1340                         return true;
1341                 } else if ((new_order - y_span) < tavs.visible_y_low) {
1342                         /* we will overflow */
1343                         return true;
1344                 }
1345         }
1346
1347         return false;
1348 }
1349
1350
1351 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1352         : RegionMotionDrag (e, i, p, v, b),
1353           _copy (c)
1354 {
1355         TimeAxisView* const tv = &_primary->get_time_axis_view ();
1356
1357         _dest_trackview = tv;
1358         if (tv->layer_display() == Overlaid) {
1359                 _dest_layer = 0;
1360         } else {
1361                 _dest_layer = _primary->region()->layer ();
1362         }
1363
1364         double speed = 1;
1365         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1366         if (rtv && rtv->is_track()) {
1367                 speed = rtv->track()->speed ();
1368         }
1369
1370         _last_frame_position = static_cast<nframes64_t> (_primary->region()->position() / speed);
1371 }
1372
1373 void
1374 RegionMoveDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
1375 {
1376         RegionMotionDrag::start_grab (event, c);
1377
1378         _pointer_frame_offset = grab_frame() - _last_frame_position;
1379 }
1380
1381 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, nframes64_t pos)
1382         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1383 {
1384         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1385                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1386
1387         _primary = v->view()->create_region_view (r, false, false);
1388
1389         _primary->get_canvas_group()->show ();
1390         _primary->set_position (pos, 0);
1391         _views.push_back (DraggingView (_primary));
1392
1393         _last_frame_position = pos;
1394
1395         _item = _primary->get_canvas_group ();
1396         _dest_trackview = v;
1397         _dest_layer = _primary->region()->layer ();
1398 }
1399
1400 map<RegionView*, pair<RouteTimeAxisView*, int> >
1401 RegionMotionDrag::find_time_axis_views_and_layers ()
1402 {
1403         map<RegionView*, pair<RouteTimeAxisView*, int> > tav;
1404
1405         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1406
1407                 double ix1, ix2, iy1, iy2;
1408                 RegionView* rv = i->view;
1409                 rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
1410                 rv->get_canvas_frame()->i2w (ix1, iy1);
1411                 iy1 += _editor->vertical_adjustment.get_value() - _editor->canvas_timebars_vsize;
1412
1413                 pair<TimeAxisView*, int> tv = _editor->trackview_by_y_position (iy1);
1414                 tav[rv] = make_pair (dynamic_cast<RouteTimeAxisView*> (tv.first), tv.second);
1415         }
1416
1417         return tav;
1418 }
1419
1420
1421 void
1422 RegionInsertDrag::finished (GdkEvent* /*event*/, bool /*movement_occurred*/)
1423 {
1424         _editor->update_canvas_now ();
1425
1426         map<RegionView*, pair<RouteTimeAxisView*, int> > final = find_time_axis_views_and_layers ();
1427
1428         RouteTimeAxisView* dest_rtv = final[_primary].first;
1429
1430         _primary->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
1431         _primary->get_canvas_group()->property_y() = 0;
1432
1433         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1434
1435         _editor->begin_reversible_command (_("insert region"));
1436         playlist->clear_history ();
1437         playlist->add_region (_primary->region (), _last_frame_position);
1438         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1439         _editor->commit_reversible_command ();
1440
1441         delete _primary;
1442         _primary = 0;
1443         _views.clear ();
1444 }
1445
1446 void
1447 RegionInsertDrag::aborted ()
1448 {
1449         delete _primary;
1450         _primary = 0;
1451         _views.clear ();
1452 }
1453
1454 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1455         : RegionMoveDrag (e, i, p, v, false, false)
1456 {
1457
1458 }
1459
1460 struct RegionSelectionByPosition {
1461     bool operator() (RegionView*a, RegionView* b) {
1462             return a->region()->position () < b->region()->position();
1463     }
1464 };
1465
1466 void
1467 RegionSpliceDrag::motion (GdkEvent* event, bool)
1468 {
1469         RouteTimeAxisView* tv;
1470         layer_t layer;
1471
1472         if (!check_possible (&tv, &layer)) {
1473                 return;
1474         }
1475
1476         int dir;
1477
1478         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1479                 dir = 1;
1480         } else {
1481                 dir = -1;
1482         }
1483
1484         RegionSelection copy (_editor->selection->regions);
1485
1486         RegionSelectionByPosition cmp;
1487         copy.sort (cmp);
1488
1489         nframes64_t const pf = adjusted_current_frame (event);
1490
1491         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1492
1493                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1494
1495                 if (!atv) {
1496                         continue;
1497                 }
1498
1499                 boost::shared_ptr<Playlist> playlist;
1500
1501                 if ((playlist = atv->playlist()) == 0) {
1502                         continue;
1503                 }
1504
1505                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1506                         continue;
1507                 }
1508
1509                 if (dir > 0) {
1510                         if (pf < (*i)->region()->last_frame() + 1) {
1511                                 continue;
1512                         }
1513                 } else {
1514                         if (pf > (*i)->region()->first_frame()) {
1515                                 continue;
1516                         }
1517                 }
1518
1519
1520                 playlist->shuffle ((*i)->region(), dir);
1521         }
1522 }
1523
1524 void
1525 RegionSpliceDrag::finished (GdkEvent* /*event*/, bool)
1526 {
1527
1528 }
1529
1530 void
1531 RegionSpliceDrag::aborted ()
1532 {
1533         /* XXX: TODO */
1534 }
1535
1536 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
1537         : Drag (e, i),
1538           _view (v)
1539 {
1540
1541 }
1542
1543 void
1544 RegionCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
1545 {
1546         _dest_trackview = _view;
1547
1548         Drag::start_grab (event);
1549 }
1550
1551
1552 void
1553 RegionCreateDrag::motion (GdkEvent* /*event*/, bool first_move)
1554 {
1555         if (first_move) {
1556                 // TODO: create region-create-drag region view here
1557         }
1558
1559         // TODO: resize region-create-drag region view here
1560 }
1561
1562 void
1563 RegionCreateDrag::finished (GdkEvent* event, bool movement_occurred)
1564 {
1565         MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (_dest_trackview);
1566
1567         if (!mtv) {
1568                 return;
1569         }
1570
1571         if (!movement_occurred) {
1572                 mtv->add_region (grab_frame ());
1573         } else {
1574                 motion (event, false);
1575                 // TODO: create region-create-drag region here
1576         }
1577 }
1578
1579 void
1580 RegionCreateDrag::aborted ()
1581 {
1582         /* XXX: TODO */
1583 }
1584
1585 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
1586         : Drag (e, i)
1587         , region (0)
1588 {
1589
1590 }
1591
1592 void
1593 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
1594 {
1595         Gdk::Cursor* cursor;
1596         ArdourCanvas::CanvasNote* cnote = dynamic_cast<ArdourCanvas::CanvasNote*>(_item);
1597
1598         Drag::start_grab (event);
1599
1600         region = &cnote->region_view();
1601
1602         double const region_start = region->get_position_pixels();
1603         double const middle_point = region_start + cnote->x1() + (cnote->x2() - cnote->x1()) / 2.0L;
1604
1605         if (grab_x() <= middle_point) {
1606                 cursor = _editor->left_side_trim_cursor;
1607                 at_front = true;
1608         } else {
1609                 cursor = _editor->right_side_trim_cursor;
1610                 at_front = false;
1611         }
1612
1613         _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, *cursor, event->motion.time);
1614
1615         if (event->motion.state & Keyboard::PrimaryModifier) {
1616                 relative = false;
1617         } else {
1618                 relative = true;
1619         }
1620
1621         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1622
1623         if (ms.size() > 1) {
1624                 /* has to be relative, may make no sense otherwise */
1625                 relative = true;
1626         }
1627
1628         /* select this note; if it is already selected, preserve the existing selection,
1629            otherwise make this note the only one selected.
1630         */
1631         region->note_selected (cnote, cnote->selected ());
1632
1633         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
1634                 MidiRegionSelection::iterator next;
1635                 next = r;
1636                 ++next;
1637                 (*r)->begin_resizing (at_front);
1638                 r = next;
1639         }
1640 }
1641
1642 void
1643 NoteResizeDrag::motion (GdkEvent* /*event*/, bool /*first_move*/)
1644 {
1645         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1646         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1647                 (*r)->update_resizing (dynamic_cast<ArdourCanvas::CanvasNote*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1648         }
1649 }
1650
1651 void
1652 NoteResizeDrag::finished (GdkEvent*, bool /*movement_occurred*/)
1653 {
1654         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1655         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1656                 (*r)->commit_resizing (dynamic_cast<ArdourCanvas::CanvasNote*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1657         }
1658 }
1659
1660 void
1661 NoteResizeDrag::aborted ()
1662 {
1663         /* XXX: TODO */
1664 }
1665
1666 void
1667 RegionGainDrag::motion (GdkEvent* /*event*/, bool)
1668 {
1669
1670 }
1671
1672 void
1673 RegionGainDrag::finished (GdkEvent *, bool)
1674 {
1675
1676 }
1677
1678 void
1679 RegionGainDrag::aborted ()
1680 {
1681         /* XXX: TODO */
1682 }
1683
1684 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1685         : RegionDrag (e, i, p, v)
1686         , _have_transaction (false)
1687 {
1688
1689 }
1690
1691 void
1692 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
1693 {
1694         double speed = 1.0;
1695         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1696         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1697
1698         if (tv && tv->is_track()) {
1699                 speed = tv->track()->speed();
1700         }
1701
1702         nframes64_t const region_start = (nframes64_t) (_primary->region()->position() / speed);
1703         nframes64_t const region_end = (nframes64_t) (_primary->region()->last_frame() / speed);
1704         nframes64_t const region_length = (nframes64_t) (_primary->region()->length() / speed);
1705
1706         nframes64_t const pf = adjusted_current_frame (event);
1707
1708         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1709                 _operation = ContentsTrim;
1710                 Drag::start_grab (event, _editor->trimmer_cursor);
1711         } else {
1712                 /* These will get overridden for a point trim.*/
1713                 if (pf < (region_start + region_length/2)) {
1714                         /* closer to start */
1715                         _operation = StartTrim;
1716                         Drag::start_grab (event, _editor->left_side_trim_cursor);
1717                 } else {
1718                         /* closer to end */
1719                         _operation = EndTrim;
1720                         Drag::start_grab (event, _editor->right_side_trim_cursor);
1721                 }
1722         }
1723
1724         switch (_operation) {
1725         case StartTrim:
1726                 _editor->show_verbose_time_cursor (region_start, 10);
1727                 break;
1728         case EndTrim:
1729                 _editor->show_verbose_time_cursor (region_end, 10);
1730                 break;
1731         case ContentsTrim:
1732                 _editor->show_verbose_time_cursor (pf, 10);
1733                 break;
1734         }
1735 }
1736
1737 void
1738 TrimDrag::motion (GdkEvent* event, bool first_move)
1739 {
1740         RegionView* rv = _primary;
1741
1742         /* snap modifier works differently here..
1743            its current state has to be passed to the
1744            various trim functions in order to work properly
1745         */
1746
1747         double speed = 1.0;
1748         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1749         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1750         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
1751
1752         if (tv && tv->is_track()) {
1753                 speed = tv->track()->speed();
1754         }
1755
1756         nframes64_t const pf = adjusted_current_frame (event);
1757
1758         if (first_move) {
1759
1760                 string trim_type;
1761
1762                 switch (_operation) {
1763                 case StartTrim:
1764                         trim_type = "Region start trim";
1765                         break;
1766                 case EndTrim:
1767                         trim_type = "Region end trim";
1768                         break;
1769                 case ContentsTrim:
1770                         trim_type = "Region content trim";
1771                         break;
1772                 }
1773
1774                 _editor->begin_reversible_command (trim_type);
1775                 _have_transaction = true;
1776
1777                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1778                         RegionView* rv = i->view;
1779                         rv->fake_set_opaque(false);
1780                         rv->enable_display (false);
1781                         rv->region()->clear_history ();
1782                         rv->region()->suspend_property_changes ();
1783
1784                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
1785
1786                         if (arv){
1787                                 arv->temporarily_hide_envelope ();
1788                         }
1789
1790                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
1791                         insert_result = _editor->motion_frozen_playlists.insert (pl);
1792
1793                         if (insert_result.second) {
1794                                 pl->freeze();
1795                         }
1796                 }
1797         }
1798
1799         bool non_overlap_trim = false;
1800
1801         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
1802                 non_overlap_trim = true;
1803         }
1804
1805         switch (_operation) {
1806         case StartTrim:
1807                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1808                         _editor->single_start_trim (*i->view, pf, non_overlap_trim);
1809                 }
1810                 break;
1811
1812         case EndTrim:
1813                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1814                         _editor->single_end_trim (*i->view, pf, non_overlap_trim);
1815                 }
1816                 break;
1817
1818         case ContentsTrim:
1819                 {
1820                         bool swap_direction = false;
1821
1822                         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1823                                 swap_direction = true;
1824                         }
1825
1826                         nframes64_t frame_delta = 0;
1827
1828                         bool left_direction = false;
1829                         if (last_pointer_frame() > pf) {
1830                                 left_direction = true;
1831                         }
1832
1833                         if (left_direction) {
1834                                 frame_delta = (last_pointer_frame() - pf);
1835                         } else {
1836                                 frame_delta = (pf - last_pointer_frame());
1837                         }
1838
1839                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1840                                 _editor->single_contents_trim (*i->view, frame_delta, left_direction, swap_direction);
1841                         }
1842                 }
1843                 break;
1844         }
1845
1846         switch (_operation) {
1847         case StartTrim:
1848                 _editor->show_verbose_time_cursor((nframes64_t) (rv->region()->position()/speed), 10);
1849                 break;
1850         case EndTrim:
1851                 _editor->show_verbose_time_cursor((nframes64_t) (rv->region()->last_frame()/speed), 10);
1852                 break;
1853         case ContentsTrim:
1854                 _editor->show_verbose_time_cursor (pf, 10);
1855                 break;
1856         }
1857 }
1858
1859
1860 void
1861 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
1862 {
1863         if (movement_occurred) {
1864                 motion (event, false);
1865
1866                 if (!_editor->selection->selected (_primary)) {
1867                         _editor->thaw_region_after_trim (*_primary);
1868                 } else {
1869
1870                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1871                                 _editor->thaw_region_after_trim (*i->view);
1872                                 i->view->enable_display (true);
1873                                 i->view->fake_set_opaque (true);
1874                                 if (_have_transaction) {
1875                                         _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
1876                                 }
1877                         }
1878                 }
1879                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
1880                         (*p)->thaw ();
1881                 }
1882
1883                 _editor->motion_frozen_playlists.clear ();
1884
1885                 if (_have_transaction) {
1886                         _editor->commit_reversible_command();
1887                 }
1888
1889         } else {
1890                 /* no mouse movement */
1891                 _editor->point_trim (event, adjusted_current_frame (event));
1892         }
1893 }
1894
1895 void
1896 TrimDrag::aborted ()
1897 {
1898         /* Our motion method is changing model state, so use the Undo system
1899            to cancel.  Perhaps not ideal, as this will leave an Undo point
1900            behind which may be slightly odd from the user's point of view.
1901         */
1902
1903         finished (0, true);
1904
1905         if (_have_transaction) {
1906                 _editor->undo ();
1907         }
1908 }
1909
1910 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
1911         : Drag (e, i),
1912           _copy (c)
1913 {
1914         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
1915         assert (_marker);
1916 }
1917
1918 void
1919 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
1920 {
1921         if (_copy) {
1922                 // create a dummy marker for visual representation of moving the copy.
1923                 // The actual copying is not done before we reach the finish callback.
1924                 char name[64];
1925                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().beats_per_bar(), _marker->meter().note_divisor ());
1926                 MeterMarker* new_marker = new MeterMarker(*_editor, *_editor->meter_group, ARDOUR_UI::config()->canvasvar_MeterMarker.get(), name,
1927                                                           *new MeterSection (_marker->meter()));
1928
1929                 _item = &new_marker->the_item ();
1930                 _marker = new_marker;
1931
1932         } else {
1933
1934                 MetricSection& section (_marker->meter());
1935
1936                 if (!section.movable()) {
1937                         return;
1938                 }
1939
1940         }
1941
1942         Drag::start_grab (event, cursor);
1943
1944         _pointer_frame_offset = grab_frame() - _marker->meter().frame();
1945
1946         _editor->show_verbose_time_cursor (adjusted_current_frame(event), 10);
1947 }
1948
1949 void
1950 MeterMarkerDrag::motion (GdkEvent* event, bool)
1951 {
1952         nframes64_t const pf = adjusted_current_frame (event);
1953
1954         _marker->set_position (pf);
1955
1956         _editor->show_verbose_time_cursor (pf, 10);
1957 }
1958
1959 void
1960 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
1961 {
1962         if (!movement_occurred) {
1963                 return;
1964         }
1965
1966         motion (event, false);
1967
1968         BBT_Time when;
1969
1970         TempoMap& map (_editor->session()->tempo_map());
1971         map.bbt_time (last_pointer_frame(), when);
1972
1973         if (_copy == true) {
1974                 _editor->begin_reversible_command (_("copy meter mark"));
1975                 XMLNode &before = map.get_state();
1976                 map.add_meter (_marker->meter(), when);
1977                 XMLNode &after = map.get_state();
1978                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
1979                 _editor->commit_reversible_command ();
1980
1981                 // delete the dummy marker we used for visual representation of copying.
1982                 // a new visual marker will show up automatically.
1983                 delete _marker;
1984         } else {
1985                 _editor->begin_reversible_command (_("move meter mark"));
1986                 XMLNode &before = map.get_state();
1987                 map.move_meter (_marker->meter(), when);
1988                 XMLNode &after = map.get_state();
1989                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
1990                 _editor->commit_reversible_command ();
1991         }
1992 }
1993
1994 void
1995 MeterMarkerDrag::aborted ()
1996 {
1997         _marker->set_position (_marker->meter().frame ());
1998 }
1999
2000 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
2001         : Drag (e, i),
2002           _copy (c)
2003 {
2004         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
2005         assert (_marker);
2006 }
2007
2008 void
2009 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2010 {
2011
2012         if (_copy) {
2013
2014                 // create a dummy marker for visual representation of moving the copy.
2015                 // The actual copying is not done before we reach the finish callback.
2016                 char name[64];
2017                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
2018                 TempoMarker* new_marker = new TempoMarker(*_editor, *_editor->tempo_group, ARDOUR_UI::config()->canvasvar_TempoMarker.get(), name,
2019                                                           *new TempoSection (_marker->tempo()));
2020
2021                 _item = &new_marker->the_item ();
2022                 _marker = new_marker;
2023
2024         } else {
2025
2026                 MetricSection& section (_marker->tempo());
2027
2028                 if (!section.movable()) {
2029                         return;
2030                 }
2031         }
2032
2033         Drag::start_grab (event, cursor);
2034
2035         _pointer_frame_offset = grab_frame() - _marker->tempo().frame();
2036         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
2037 }
2038
2039 void
2040 TempoMarkerDrag::motion (GdkEvent* event, bool)
2041 {
2042         nframes64_t const pf = adjusted_current_frame (event);
2043         _marker->set_position (pf);
2044         _editor->show_verbose_time_cursor (pf, 10);
2045 }
2046
2047 void
2048 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2049 {
2050         if (!movement_occurred) {
2051                 return;
2052         }
2053
2054         motion (event, false);
2055
2056         BBT_Time when;
2057
2058         TempoMap& map (_editor->session()->tempo_map());
2059         map.bbt_time (last_pointer_frame(), when);
2060
2061         if (_copy == true) {
2062                 _editor->begin_reversible_command (_("copy tempo mark"));
2063                 XMLNode &before = map.get_state();
2064                 map.add_tempo (_marker->tempo(), when);
2065                 XMLNode &after = map.get_state();
2066                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
2067                 _editor->commit_reversible_command ();
2068
2069                 // delete the dummy marker we used for visual representation of copying.
2070                 // a new visual marker will show up automatically.
2071                 delete _marker;
2072         } else {
2073                 _editor->begin_reversible_command (_("move tempo mark"));
2074                 XMLNode &before = map.get_state();
2075                 map.move_tempo (_marker->tempo(), when);
2076                 XMLNode &after = map.get_state();
2077                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
2078                 _editor->commit_reversible_command ();
2079         }
2080 }
2081
2082 void
2083 TempoMarkerDrag::aborted ()
2084 {
2085         _marker->set_position (_marker->tempo().frame());
2086 }
2087
2088 CursorDrag::CursorDrag (Editor* e, ArdourCanvas::Item* i, bool s)
2089         : Drag (e, i),
2090           _stop (s)
2091 {
2092         _cursor = reinterpret_cast<EditorCursor*> (_item->get_data ("cursor"));
2093         assert (_cursor);
2094 }
2095
2096 void
2097 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
2098 {
2099         Drag::start_grab (event, c);
2100
2101         if (!_stop) {
2102
2103                 nframes64_t where = _editor->event_frame (event, 0, 0);
2104
2105                 _editor->snap_to_with_modifier (where, event);
2106                 _editor->playhead_cursor->set_position (where);
2107
2108         }
2109
2110         if (_cursor == _editor->playhead_cursor) {
2111                 _editor->_dragging_playhead = true;
2112
2113                 if (_editor->session() && _was_rolling && _stop) {
2114                         _editor->session()->request_stop ();
2115                 }
2116
2117                 if (_editor->session() && _editor->session()->is_auditioning()) {
2118                         _editor->session()->cancel_audition ();
2119                 }
2120         }
2121
2122         _pointer_frame_offset = grab_frame() - _cursor->current_frame;
2123
2124         _editor->show_verbose_time_cursor (_cursor->current_frame, 10);
2125 }
2126
2127 void
2128 CursorDrag::motion (GdkEvent* event, bool)
2129 {
2130         nframes64_t const adjusted_frame = adjusted_current_frame (event);
2131
2132         if (adjusted_frame == last_pointer_frame()) {
2133                 return;
2134         }
2135
2136         _cursor->set_position (adjusted_frame);
2137
2138         _editor->show_verbose_time_cursor (_cursor->current_frame, 10);
2139
2140         if (_editor->session() && _item == &_editor->playhead_cursor->canvas_item) {
2141                 nframes64_t const f = _editor->playhead_cursor->current_frame;
2142                 _editor->session()->send_mmc_locate (f);
2143                 _editor->session()->send_full_time_code (f);
2144         }
2145
2146
2147 #ifdef GTKOSX
2148         _editor->update_canvas_now ();
2149 #endif
2150         _editor->UpdateAllTransportClocks (_cursor->current_frame);
2151 }
2152
2153 void
2154 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
2155 {
2156         _editor->_dragging_playhead = false;
2157
2158         if (!movement_occurred && _stop) {
2159                 return;
2160         }
2161
2162         motion (event, false);
2163
2164         if (_item == &_editor->playhead_cursor->canvas_item) {
2165                 if (_editor->session()) {
2166                         _editor->session()->request_locate (_editor->playhead_cursor->current_frame, _was_rolling);
2167                         _editor->_pending_locate_request = true;
2168                 }
2169         }
2170 }
2171
2172 void
2173 CursorDrag::aborted ()
2174 {
2175         _editor->_dragging_playhead = false;
2176         _cursor->set_position (adjusted_frame (grab_frame (), 0, false));
2177 }
2178
2179 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2180         : RegionDrag (e, i, p, v)
2181 {
2182
2183 }
2184
2185 void
2186 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2187 {
2188         Drag::start_grab (event, cursor);
2189
2190         AudioRegionView* a = dynamic_cast<AudioRegionView*> (_primary);
2191         boost::shared_ptr<AudioRegion> const r = a->audio_region ();
2192
2193         _pointer_frame_offset = grab_frame() - ((nframes64_t) r->fade_in()->back()->when + r->position());
2194         _editor->show_verbose_duration_cursor (r->position(), r->position() + r->fade_in()->back()->when, 10);
2195
2196 }
2197
2198 void
2199 FadeInDrag::motion (GdkEvent* event, bool)
2200 {
2201         nframes64_t fade_length;
2202
2203         nframes64_t const pos = adjusted_current_frame (event);
2204
2205         boost::shared_ptr<Region> region = _primary->region ();
2206
2207         if (pos < (region->position() + 64)) {
2208                 fade_length = 64; // this should be a minimum defined somewhere
2209         } else if (pos > region->last_frame()) {
2210                 fade_length = region->length();
2211         } else {
2212                 fade_length = pos - region->position();
2213         }
2214
2215         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2216
2217                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2218
2219                 if (!tmp) {
2220                         continue;
2221                 }
2222
2223                 tmp->reset_fade_in_shape_width (fade_length);
2224         }
2225
2226         _editor->show_verbose_duration_cursor (region->position(), region->position() + fade_length, 10);
2227 }
2228
2229 void
2230 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
2231 {
2232         if (!movement_occurred) {
2233                 return;
2234         }
2235
2236         nframes64_t fade_length;
2237
2238         nframes64_t const pos = adjusted_current_frame (event);
2239
2240         boost::shared_ptr<Region> region = _primary->region ();
2241
2242         if (pos < (region->position() + 64)) {
2243                 fade_length = 64; // this should be a minimum defined somewhere
2244         } else if (pos > region->last_frame()) {
2245                 fade_length = region->length();
2246         } else {
2247                 fade_length = pos - region->position();
2248         }
2249
2250         _editor->begin_reversible_command (_("change fade in length"));
2251
2252         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2253
2254                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2255
2256                 if (!tmp) {
2257                         continue;
2258                 }
2259
2260                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
2261                 XMLNode &before = alist->get_state();
2262
2263                 tmp->audio_region()->set_fade_in_length (fade_length);
2264                 tmp->audio_region()->set_fade_in_active (true);
2265
2266                 XMLNode &after = alist->get_state();
2267                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2268         }
2269
2270         _editor->commit_reversible_command ();
2271 }
2272
2273 void
2274 FadeInDrag::aborted ()
2275 {
2276         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2277                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2278
2279                 if (!tmp) {
2280                         continue;
2281                 }
2282
2283                 tmp->reset_fade_in_shape_width (tmp->audio_region()->fade_in()->back()->when);
2284         }
2285 }
2286
2287 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2288         : RegionDrag (e, i, p, v)
2289 {
2290
2291 }
2292
2293 void
2294 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2295 {
2296         Drag::start_grab (event, cursor);
2297
2298         AudioRegionView* a = dynamic_cast<AudioRegionView*> (_primary);
2299         boost::shared_ptr<AudioRegion> r = a->audio_region ();
2300
2301         _pointer_frame_offset = grab_frame() - (r->length() - (nframes64_t) r->fade_out()->back()->when + r->position());
2302         _editor->show_verbose_duration_cursor (r->last_frame() - r->fade_out()->back()->when, r->last_frame(), 10);
2303 }
2304
2305 void
2306 FadeOutDrag::motion (GdkEvent* event, bool)
2307 {
2308         nframes64_t fade_length;
2309
2310         nframes64_t const pos = adjusted_current_frame (event);
2311
2312         boost::shared_ptr<Region> region = _primary->region ();
2313
2314         if (pos > (region->last_frame() - 64)) {
2315                 fade_length = 64; // this should really be a minimum fade defined somewhere
2316         }
2317         else if (pos < region->position()) {
2318                 fade_length = region->length();
2319         }
2320         else {
2321                 fade_length = region->last_frame() - pos;
2322         }
2323
2324         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2325
2326                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2327
2328                 if (!tmp) {
2329                         continue;
2330                 }
2331
2332                 tmp->reset_fade_out_shape_width (fade_length);
2333         }
2334
2335         _editor->show_verbose_duration_cursor (region->last_frame() - fade_length, region->last_frame(), 10);
2336 }
2337
2338 void
2339 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
2340 {
2341         if (!movement_occurred) {
2342                 return;
2343         }
2344
2345         nframes64_t fade_length;
2346
2347         nframes64_t const pos = adjusted_current_frame (event);
2348
2349         boost::shared_ptr<Region> region = _primary->region ();
2350
2351         if (pos > (region->last_frame() - 64)) {
2352                 fade_length = 64; // this should really be a minimum fade defined somewhere
2353         }
2354         else if (pos < region->position()) {
2355                 fade_length = region->length();
2356         }
2357         else {
2358                 fade_length = region->last_frame() - pos;
2359         }
2360
2361         _editor->begin_reversible_command (_("change fade out length"));
2362
2363         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2364
2365                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2366
2367                 if (!tmp) {
2368                         continue;
2369                 }
2370
2371                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
2372                 XMLNode &before = alist->get_state();
2373
2374                 tmp->audio_region()->set_fade_out_length (fade_length);
2375                 tmp->audio_region()->set_fade_out_active (true);
2376
2377                 XMLNode &after = alist->get_state();
2378                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2379         }
2380
2381         _editor->commit_reversible_command ();
2382 }
2383
2384 void
2385 FadeOutDrag::aborted ()
2386 {
2387         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2388                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2389
2390                 if (!tmp) {
2391                         continue;
2392                 }
2393
2394                 tmp->reset_fade_out_shape_width (tmp->audio_region()->fade_out()->back()->when);
2395         }
2396 }
2397
2398 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
2399         : Drag (e, i)
2400 {
2401         _marker = reinterpret_cast<Marker*> (_item->get_data ("marker"));
2402         assert (_marker);
2403
2404         _points.push_back (Gnome::Art::Point (0, 0));
2405         _points.push_back (Gnome::Art::Point (0, _editor->physical_screen_height));
2406
2407         _line = new ArdourCanvas::Line (*_editor->timebar_group);
2408         _line->property_width_pixels() = 1;
2409         _line->property_points () = _points;
2410         _line->hide ();
2411
2412         _line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
2413 }
2414
2415 MarkerDrag::~MarkerDrag ()
2416 {
2417         for (list<Location*>::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
2418                 delete *i;
2419         }
2420 }
2421
2422 void
2423 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2424 {
2425         Drag::start_grab (event, cursor);
2426
2427         bool is_start;
2428
2429         Location *location = _editor->find_location_from_marker (_marker, is_start);
2430         _editor->_dragging_edit_point = true;
2431
2432         _pointer_frame_offset = grab_frame() - (is_start ? location->start() : location->end());
2433
2434         update_item (location);
2435
2436         // _drag_line->show();
2437         // _line->raise_to_top();
2438
2439         if (is_start) {
2440                 _editor->show_verbose_time_cursor (location->start(), 10);
2441         } else {
2442                 _editor->show_verbose_time_cursor (location->end(), 10);
2443         }
2444
2445         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2446
2447         switch (op) {
2448         case Selection::Toggle:
2449                 _editor->selection->toggle (_marker);
2450                 break;
2451         case Selection::Set:
2452                 if (!_editor->selection->selected (_marker)) {
2453                         _editor->selection->set (_marker);
2454                 }
2455                 break;
2456         case Selection::Extend:
2457         {
2458                 Locations::LocationList ll;
2459                 list<Marker*> to_add;
2460                 nframes64_t s, e;
2461                 _editor->selection->markers.range (s, e);
2462                 s = min (_marker->position(), s);
2463                 e = max (_marker->position(), e);
2464                 s = min (s, e);
2465                 e = max (s, e);
2466                 if (e < max_frames) {
2467                         ++e;
2468                 }
2469                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
2470                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
2471                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
2472                         if (lm) {
2473                                 if (lm->start) {
2474                                         to_add.push_back (lm->start);
2475                                 }
2476                                 if (lm->end) {
2477                                         to_add.push_back (lm->end);
2478                                 }
2479                         }
2480                 }
2481                 if (!to_add.empty()) {
2482                         _editor->selection->add (to_add);
2483                 }
2484                 break;
2485         }
2486         case Selection::Add:
2487                 _editor->selection->add (_marker);
2488                 break;
2489         }
2490
2491         /* Set up copies for us to manipulate during the drag */
2492
2493         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
2494                 Location* l = _editor->find_location_from_marker (*i, is_start);
2495                 _copied_locations.push_back (new Location (*l));
2496         }
2497 }
2498
2499 void
2500 MarkerDrag::motion (GdkEvent* event, bool)
2501 {
2502         nframes64_t f_delta = 0;
2503         bool is_start;
2504         bool move_both = false;
2505         Marker* marker;
2506         Location *real_location;
2507         Location *copy_location = 0;
2508
2509         nframes64_t const newframe = adjusted_current_frame (event);
2510
2511         nframes64_t next = newframe;
2512
2513         if (newframe == last_pointer_frame()) {
2514                 return;
2515         }
2516
2517         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
2518                 move_both = true;
2519         }
2520
2521         MarkerSelection::iterator i;
2522         list<Location*>::iterator x;
2523
2524         /* find the marker we're dragging, and compute the delta */
2525
2526         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2527              x != _copied_locations.end() && i != _editor->selection->markers.end();
2528              ++i, ++x) {
2529
2530                 copy_location = *x;
2531                 marker = *i;
2532
2533                 if (marker == _marker) {
2534
2535                         if ((real_location = _editor->find_location_from_marker (marker, is_start)) == 0) {
2536                                 /* que pasa ?? */
2537                                 return;
2538                         }
2539
2540                         if (real_location->is_mark()) {
2541                                 f_delta = newframe - copy_location->start();
2542                         } else {
2543
2544
2545                                 switch (marker->type()) {
2546                                 case Marker::Start:
2547                                 case Marker::LoopStart:
2548                                 case Marker::PunchIn:
2549                                         f_delta = newframe - copy_location->start();
2550                                         break;
2551
2552                                 case Marker::End:
2553                                 case Marker::LoopEnd:
2554                                 case Marker::PunchOut:
2555                                         f_delta = newframe - copy_location->end();
2556                                         break;
2557                                 default:
2558                                         /* what kind of marker is this ? */
2559                                         return;
2560                                 }
2561                         }
2562                         break;
2563                 }
2564         }
2565
2566         if (i == _editor->selection->markers.end()) {
2567                 /* hmm, impossible - we didn't find the dragged marker */
2568                 return;
2569         }
2570
2571         /* now move them all */
2572
2573         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2574              x != _copied_locations.end() && i != _editor->selection->markers.end();
2575              ++i, ++x) {
2576
2577                 copy_location = *x;
2578                 marker = *i;
2579
2580                 /* call this to find out if its the start or end */
2581
2582                 if ((real_location = _editor->find_location_from_marker (marker, is_start)) == 0) {
2583                         continue;
2584                 }
2585
2586                 if (real_location->locked()) {
2587                         continue;
2588                 }
2589
2590                 if (copy_location->is_mark()) {
2591
2592                         /* now move it */
2593
2594                         copy_location->set_start (copy_location->start() + f_delta);
2595
2596                 } else {
2597
2598                         nframes64_t new_start = copy_location->start() + f_delta;
2599                         nframes64_t new_end = copy_location->end() + f_delta;
2600
2601                         if (is_start) { // start-of-range marker
2602
2603                                 if (move_both) {
2604                                         copy_location->set_start (new_start);
2605                                         copy_location->set_end (new_end);
2606                                 } else  if (new_start < copy_location->end()) {
2607                                         copy_location->set_start (new_start);
2608                                 } else {
2609                                         _editor->snap_to (next, 1, true);
2610                                         copy_location->set_end (next);
2611                                         copy_location->set_start (newframe);
2612                                 }
2613
2614                         } else { // end marker
2615
2616                                 if (move_both) {
2617                                         copy_location->set_end (new_end);
2618                                         copy_location->set_start (new_start);
2619                                 } else if (new_end > copy_location->start()) {
2620                                         copy_location->set_end (new_end);
2621                                 } else if (newframe > 0) {
2622                                         _editor->snap_to (next, -1, true);
2623                                         copy_location->set_start (next);
2624                                         copy_location->set_end (newframe);
2625                                 }
2626                         }
2627                 }
2628
2629                 update_item (copy_location);
2630
2631                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
2632
2633                 if (lm) {
2634                         lm->set_position (copy_location->start(), copy_location->end());
2635                 }
2636         }
2637
2638         assert (!_copied_locations.empty());
2639
2640         _editor->show_verbose_time_cursor (newframe, 10);
2641
2642 #ifdef GTKOSX
2643         _editor->update_canvas_now ();
2644 #endif
2645 }
2646
2647 void
2648 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2649 {
2650         if (!movement_occurred) {
2651
2652                 /* just a click, do nothing but finish
2653                    off the selection process
2654                 */
2655
2656                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2657
2658                 switch (op) {
2659                 case Selection::Set:
2660                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
2661                                 _editor->selection->set (_marker);
2662                         }
2663                         break;
2664
2665                 case Selection::Toggle:
2666                 case Selection::Extend:
2667                 case Selection::Add:
2668                         break;
2669                 }
2670
2671                 return;
2672         }
2673
2674         _editor->_dragging_edit_point = false;
2675
2676         _editor->begin_reversible_command ( _("move marker") );
2677         XMLNode &before = _editor->session()->locations()->get_state();
2678
2679         MarkerSelection::iterator i;
2680         list<Location*>::iterator x;
2681         bool is_start;
2682
2683         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2684              x != _copied_locations.end() && i != _editor->selection->markers.end();
2685              ++i, ++x) {
2686
2687                 Location * location = _editor->find_location_from_marker (*i, is_start);
2688
2689                 if (location) {
2690
2691                         if (location->locked()) {
2692                                 return;
2693                         }
2694
2695                         if (location->is_mark()) {
2696                                 location->set_start ((*x)->start());
2697                         } else {
2698                                 location->set ((*x)->start(), (*x)->end());
2699                         }
2700                 }
2701         }
2702
2703         XMLNode &after = _editor->session()->locations()->get_state();
2704         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
2705         _editor->commit_reversible_command ();
2706
2707         _line->hide();
2708 }
2709
2710 void
2711 MarkerDrag::aborted ()
2712 {
2713         /* XXX: TODO */
2714 }
2715
2716 void
2717 MarkerDrag::update_item (Location* location)
2718 {
2719         double const x1 = _editor->frame_to_pixel (location->start());
2720
2721         _points.front().set_x(x1);
2722         _points.back().set_x(x1);
2723         _line->property_points() = _points;
2724 }
2725
2726 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
2727         : Drag (e, i),
2728           _cumulative_x_drag (0),
2729           _cumulative_y_drag (0)
2730 {
2731         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
2732         assert (_point);
2733 }
2734
2735
2736 void
2737 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2738 {
2739         Drag::start_grab (event, _editor->fader_cursor);
2740
2741         // start the grab at the center of the control point so
2742         // the point doesn't 'jump' to the mouse after the first drag
2743         _time_axis_view_grab_x = _point->get_x();
2744         _time_axis_view_grab_y = _point->get_y();
2745
2746         float const fraction = 1 - (_point->get_y() / _point->line().height());
2747
2748         _point->line().start_drag_single (_point, _time_axis_view_grab_x, fraction);
2749
2750         _editor->set_verbose_canvas_cursor (_point->line().get_verbose_cursor_string (fraction),
2751                                             event->button.x + 10, event->button.y + 10);
2752
2753         _editor->show_verbose_canvas_cursor ();
2754 }
2755
2756 void
2757 ControlPointDrag::motion (GdkEvent* event, bool)
2758 {
2759         double dx = _drags->current_pointer_x() - last_pointer_x();
2760         double dy = _drags->current_pointer_y() - last_pointer_y();
2761
2762         if (event->button.state & Keyboard::SecondaryModifier) {
2763                 dx *= 0.1;
2764                 dy *= 0.1;
2765         }
2766
2767         /* coordinate in TimeAxisView's space */
2768         double cx = _time_axis_view_grab_x + _cumulative_x_drag + dx;
2769         double cy = _time_axis_view_grab_y + _cumulative_y_drag + dy;
2770
2771         // calculate zero crossing point. back off by .01 to stay on the
2772         // positive side of zero
2773         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
2774
2775         // make sure we hit zero when passing through
2776         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
2777                 cy = zero_gain_y;
2778         }
2779
2780         if (_x_constrained) {
2781                 cx = _time_axis_view_grab_x;
2782         }
2783         if (_y_constrained) {
2784                 cy = _time_axis_view_grab_y;
2785         }
2786
2787         _cumulative_x_drag = cx - _time_axis_view_grab_x;
2788         _cumulative_y_drag = cy - _time_axis_view_grab_y;
2789
2790         cx = max (0.0, cx);
2791         cy = max (0.0, cy);
2792         cy = min ((double) _point->line().height(), cy);
2793
2794         nframes64_t cx_frames = _editor->unit_to_frame (cx);
2795
2796         if (!_x_constrained) {
2797                 _editor->snap_to_with_modifier (cx_frames, event);
2798         }
2799
2800         float const fraction = 1.0 - (cy / _point->line().height());
2801
2802         bool const push = Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier);
2803
2804         _point->line().drag_motion (_editor->frame_to_unit (cx_frames), fraction, false, push);
2805
2806         _editor->set_verbose_canvas_cursor_text (_point->line().get_verbose_cursor_string (fraction));
2807 }
2808
2809 void
2810 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
2811 {
2812         if (!movement_occurred) {
2813
2814                 /* just a click */
2815
2816                 if ((event->type == GDK_BUTTON_RELEASE) && (event->button.button == 1) && Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
2817                         _editor->reset_point_selection ();
2818                 }
2819
2820         } else {
2821                 motion (event, false);
2822         }
2823         _point->line().end_drag ();
2824 }
2825
2826 void
2827 ControlPointDrag::aborted ()
2828 {
2829         _point->line().reset ();
2830 }
2831
2832 bool
2833 ControlPointDrag::active (Editing::MouseMode m)
2834 {
2835         if (m == Editing::MouseGain) {
2836                 /* always active in mouse gain */
2837                 return true;
2838         }
2839
2840         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
2841         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
2842 }
2843
2844 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
2845         : Drag (e, i),
2846           _line (0),
2847           _cumulative_y_drag (0)
2848 {
2849
2850 }
2851 void
2852 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2853 {
2854         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
2855         assert (_line);
2856
2857         _item = &_line->grab_item ();
2858
2859         /* need to get x coordinate in terms of parent (TimeAxisItemView)
2860            origin, and ditto for y.
2861         */
2862
2863         double cx = event->button.x;
2864         double cy = event->button.y;
2865
2866         _line->parent_group().w2i (cx, cy);
2867
2868         nframes64_t const frame_within_region = (nframes64_t) floor (cx * _editor->frames_per_unit);
2869
2870         uint32_t before;
2871         uint32_t after;
2872
2873         if (!_line->control_points_adjacent (frame_within_region, before, after)) {
2874                 /* no adjacent points */
2875                 return;
2876         }
2877
2878         Drag::start_grab (event, _editor->fader_cursor);
2879
2880         /* store grab start in parent frame */
2881
2882         _time_axis_view_grab_x = cx;
2883         _time_axis_view_grab_y = cy;
2884
2885         double fraction = 1.0 - (cy / _line->height());
2886
2887         _line->start_drag_line (before, after, fraction);
2888
2889         _editor->set_verbose_canvas_cursor (_line->get_verbose_cursor_string (fraction),
2890                                             event->button.x + 10, event->button.y + 10);
2891
2892         _editor->show_verbose_canvas_cursor ();
2893 }
2894
2895 void
2896 LineDrag::motion (GdkEvent* event, bool)
2897 {
2898         double dy = _drags->current_pointer_y() - last_pointer_y();
2899
2900         if (event->button.state & Keyboard::SecondaryModifier) {
2901                 dy *= 0.1;
2902         }
2903
2904         double cy = _time_axis_view_grab_y + _cumulative_y_drag + dy;
2905
2906         _cumulative_y_drag = cy - _time_axis_view_grab_y;
2907
2908         cy = max (0.0, cy);
2909         cy = min ((double) _line->height(), cy);
2910
2911         double const fraction = 1.0 - (cy / _line->height());
2912
2913         bool push;
2914
2915         if (Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier)) {
2916                 push = false;
2917         } else {
2918                 push = true;
2919         }
2920
2921         /* we are ignoring x position for this drag, so we can just pass in anything */
2922         _line->drag_motion (0, fraction, true, push);
2923
2924         _editor->set_verbose_canvas_cursor_text (_line->get_verbose_cursor_string (fraction));
2925 }
2926
2927 void
2928 LineDrag::finished (GdkEvent* event, bool)
2929 {
2930         motion (event, false);
2931         _line->end_drag ();
2932 }
2933
2934 void
2935 LineDrag::aborted ()
2936 {
2937         _line->reset ();
2938 }
2939
2940 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
2941         : Drag (e, i),
2942           _line (0),
2943           _cumulative_x_drag (0)
2944 {
2945
2946 }
2947 void
2948 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2949 {
2950
2951         Drag::start_grab (event);
2952
2953         _line = reinterpret_cast<SimpleLine*> (_item);
2954         assert (_line);
2955
2956         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
2957
2958         double cx = event->button.x;
2959         double cy = event->button.y;
2960
2961         _item->property_parent().get_value()->w2i(cx, cy);
2962
2963         /* store grab start in parent frame */
2964         _region_view_grab_x = cx;
2965
2966         _before = _line->property_x1();
2967
2968         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
2969
2970         _max_x = _editor->frame_to_pixel(_arv->get_duration());
2971 }
2972
2973 void
2974 FeatureLineDrag::motion (GdkEvent* event, bool)
2975 {
2976         double dx = _drags->current_pointer_x() - last_pointer_x();
2977
2978         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
2979
2980         _cumulative_x_drag += dx;
2981
2982         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
2983
2984         if (cx > _max_x){
2985                 cx = _max_x;
2986         }
2987         else if(cx < 0){
2988                 cx = 0;
2989         }
2990
2991         _line->property_x1() = cx;
2992         _line->property_x2() = cx;
2993
2994         _before = _line->property_x1();
2995 }
2996
2997 void
2998 FeatureLineDrag::finished (GdkEvent* event, bool)
2999 {
3000         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
3001         _arv->update_transient(_before, _line->property_x1());
3002 }
3003
3004 void
3005 FeatureLineDrag::aborted ()
3006 {
3007         //_line->reset ();
3008 }
3009
3010 void
3011 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3012 {
3013         Drag::start_grab (event);
3014         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3015 }
3016
3017 void
3018 RubberbandSelectDrag::motion (GdkEvent* event, bool)
3019 {
3020         nframes64_t start;
3021         nframes64_t end;
3022         double y1;
3023         double y2;
3024
3025         nframes64_t const pf = adjusted_current_frame (event, Config->get_rubberbanding_snaps_to_grid ());
3026
3027         nframes64_t grab = grab_frame ();
3028         if (Config->get_rubberbanding_snaps_to_grid ()) {
3029                 _editor->snap_to_with_modifier (grab, event);
3030         }
3031
3032         /* base start and end on initial click position */
3033
3034         if (pf < grab) {
3035                 start = pf;
3036                 end = grab;
3037         } else {
3038                 end = pf;
3039                 start = grab;
3040         }
3041
3042         if (_drags->current_pointer_y() < grab_y()) {
3043                 y1 = _drags->current_pointer_y();
3044                 y2 = grab_y();
3045         } else {
3046                 y2 = _drags->current_pointer_y();
3047                 y1 = grab_y();
3048         }
3049
3050
3051         if (start != end || y1 != y2) {
3052
3053                 double x1 = _editor->frame_to_pixel (start);
3054                 double x2 = _editor->frame_to_pixel (end);
3055
3056                 _editor->rubberband_rect->property_x1() = x1;
3057                 _editor->rubberband_rect->property_y1() = y1;
3058                 _editor->rubberband_rect->property_x2() = x2;
3059                 _editor->rubberband_rect->property_y2() = y2;
3060
3061                 _editor->rubberband_rect->show();
3062                 _editor->rubberband_rect->raise_to_top();
3063
3064                 _editor->show_verbose_time_cursor (pf, 10);
3065         }
3066 }
3067
3068 void
3069 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
3070 {
3071         if (movement_occurred) {
3072
3073                 motion (event, false);
3074
3075                 double y1,y2;
3076                 if (_drags->current_pointer_y() < grab_y()) {
3077                         y1 = _drags->current_pointer_y();
3078                         y2 = grab_y();
3079                 } else {
3080                         y2 = _drags->current_pointer_y();
3081                         y1 = grab_y();
3082                 }
3083
3084
3085                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3086                 bool committed;
3087
3088                 _editor->begin_reversible_command (_("rubberband selection"));
3089
3090                 if (grab_frame() < last_pointer_frame()) {
3091                         committed = _editor->select_all_within (grab_frame(), last_pointer_frame() - 1, y1, y2, _editor->track_views, op);
3092                 } else {
3093                         committed = _editor->select_all_within (last_pointer_frame(), grab_frame() - 1, y1, y2, _editor->track_views, op);
3094                 }
3095
3096                 if (!committed) {
3097                         _editor->commit_reversible_command ();
3098                 }
3099
3100         } else {
3101                 if (!getenv("ARDOUR_SAE")) {
3102                         _editor->selection->clear_tracks();
3103                 }
3104                 _editor->selection->clear_regions();
3105                 _editor->selection->clear_points ();
3106                 _editor->selection->clear_lines ();
3107         }
3108
3109         _editor->rubberband_rect->hide();
3110 }
3111
3112 void
3113 RubberbandSelectDrag::aborted ()
3114 {
3115         _editor->rubberband_rect->hide ();
3116 }
3117
3118 void
3119 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3120 {
3121         Drag::start_grab (event);
3122
3123         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3124 }
3125
3126 void
3127 TimeFXDrag::motion (GdkEvent* event, bool)
3128 {
3129         RegionView* rv = _primary;
3130
3131         nframes64_t const pf = adjusted_current_frame (event);
3132
3133         if (pf > rv->region()->position()) {
3134                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf);
3135         }
3136
3137         _editor->show_verbose_time_cursor (pf, 10);
3138 }
3139
3140 void
3141 TimeFXDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3142 {
3143         _primary->get_time_axis_view().hide_timestretch ();
3144
3145         if (!movement_occurred) {
3146                 return;
3147         }
3148
3149         if (last_pointer_frame() < _primary->region()->position()) {
3150                 /* backwards drag of the left edge - not usable */
3151                 return;
3152         }
3153
3154         nframes64_t newlen = last_pointer_frame() - _primary->region()->position();
3155
3156         float percentage = (double) newlen / (double) _primary->region()->length();
3157
3158 #ifndef USE_RUBBERBAND
3159         // Soundtouch uses percentage / 100 instead of normal (/ 1)
3160         if (_primary->region()->data_type() == DataType::AUDIO) {
3161                 percentage = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
3162         }
3163 #endif
3164
3165         _editor->begin_reversible_command (_("timestretch"));
3166
3167         // XXX how do timeFX on multiple regions ?
3168
3169         RegionSelection rs;
3170         rs.add (_primary);
3171
3172         if (_editor->time_stretch (rs, percentage) == -1) {
3173                 error << _("An error occurred while executing time stretch operation") << endmsg;
3174         }
3175 }
3176
3177 void
3178 TimeFXDrag::aborted ()
3179 {
3180         _primary->get_time_axis_view().hide_timestretch ();
3181 }
3182
3183
3184 void
3185 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3186 {
3187         Drag::start_grab (event);
3188 }
3189
3190 void
3191 ScrubDrag::motion (GdkEvent* /*event*/, bool)
3192 {
3193         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
3194 }
3195
3196 void
3197 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3198 {
3199         if (movement_occurred && _editor->session()) {
3200                 /* make sure we stop */
3201                 _editor->session()->request_transport_speed (0.0);
3202         }
3203 }
3204
3205 void
3206 ScrubDrag::aborted ()
3207 {
3208         /* XXX: TODO */
3209 }
3210
3211 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3212         : Drag (e, i)
3213         , _operation (o)
3214         , _copy (false)
3215         , _original_pointer_time_axis (-1)
3216         , _last_pointer_time_axis (-1)
3217 {
3218
3219 }
3220
3221 void
3222 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
3223 {
3224         nframes64_t start = 0;
3225         nframes64_t end = 0;
3226
3227         if (_editor->session() == 0) {
3228                 return;
3229         }
3230
3231         Gdk::Cursor* cursor = 0;
3232
3233         switch (_operation) {
3234         case CreateSelection:
3235                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3236                         _copy = true;
3237                 } else {
3238                         _copy = false;
3239                 }
3240                 cursor = _editor->selector_cursor;
3241                 Drag::start_grab (event, cursor);
3242                 break;
3243
3244         case SelectionStartTrim:
3245                 if (_editor->clicked_axisview) {
3246                         _editor->clicked_axisview->order_selection_trims (_item, true);
3247                 }
3248                 Drag::start_grab (event, _editor->left_side_trim_cursor);
3249                 start = _editor->selection->time[_editor->clicked_selection].start;
3250                 _pointer_frame_offset = grab_frame() - start;
3251                 break;
3252
3253         case SelectionEndTrim:
3254                 if (_editor->clicked_axisview) {
3255                         _editor->clicked_axisview->order_selection_trims (_item, false);
3256                 }
3257                 Drag::start_grab (event, _editor->right_side_trim_cursor);
3258                 end = _editor->selection->time[_editor->clicked_selection].end;
3259                 _pointer_frame_offset = grab_frame() - end;
3260                 break;
3261
3262         case SelectionMove:
3263                 start = _editor->selection->time[_editor->clicked_selection].start;
3264                 Drag::start_grab (event, cursor);
3265                 _pointer_frame_offset = grab_frame() - start;
3266                 break;
3267         }
3268
3269         if (_operation == SelectionMove) {
3270                 _editor->show_verbose_time_cursor (start, 10);
3271         } else {
3272                 _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3273         }
3274
3275         _original_pointer_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ()).first->order ();
3276 }
3277
3278 void
3279 SelectionDrag::motion (GdkEvent* event, bool first_move)
3280 {
3281         nframes64_t start = 0;
3282         nframes64_t end = 0;
3283         nframes64_t length;
3284
3285         pair<TimeAxisView*, int> const pending_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ());
3286         if (pending_time_axis.first == 0) {
3287                 return;
3288         }
3289
3290         nframes64_t const pending_position = adjusted_current_frame (event);
3291
3292         /* only alter selection if things have changed */
3293
3294         if (pending_time_axis.first->order() == _last_pointer_time_axis && pending_position == last_pointer_frame()) {
3295                 return;
3296         }
3297
3298         switch (_operation) {
3299         case CreateSelection:
3300         {
3301                 nframes64_t grab = grab_frame ();
3302
3303                 if (first_move) {
3304                         _editor->snap_to (grab);
3305                 }
3306
3307                 if (pending_position < grab_frame()) {
3308                         start = pending_position;
3309                         end = grab;
3310                 } else {
3311                         end = pending_position;
3312                         start = grab;
3313                 }
3314
3315                 /* first drag: Either add to the selection
3316                    or create a new selection
3317                 */
3318
3319                 if (first_move) {
3320
3321                         if (_copy) {
3322                                 /* adding to the selection */
3323                                 _editor->selection->add (_editor->clicked_axisview);
3324                                 _editor->clicked_selection = _editor->selection->add (start, end);
3325                                 _copy = false;
3326                         } else {
3327                                 /* new selection */
3328
3329                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3330                                         _editor->selection->set (_editor->clicked_axisview);
3331                                 }
3332
3333                                 _editor->clicked_selection = _editor->selection->set (start, end);
3334                         }
3335                 }
3336
3337                 /* select the track that we're in */
3338                 if (find (_added_time_axes.begin(), _added_time_axes.end(), pending_time_axis.first) == _added_time_axes.end()) {
3339                         _editor->selection->add (pending_time_axis.first);
3340                         _added_time_axes.push_back (pending_time_axis.first);
3341                 }
3342
3343                 /* deselect any tracks that this drag no longer includes, being careful to only deselect
3344                    tracks that we selected in the first place.
3345                 */
3346
3347                 int min_order = min (_original_pointer_time_axis, pending_time_axis.first->order());
3348                 int max_order = max (_original_pointer_time_axis, pending_time_axis.first->order());
3349
3350                 list<TimeAxisView*>::iterator i = _added_time_axes.begin();
3351                 while (i != _added_time_axes.end()) {
3352
3353                         list<TimeAxisView*>::iterator tmp = i;
3354                         ++tmp;
3355
3356                         if ((*i)->order() < min_order || (*i)->order() > max_order) {
3357                                 _editor->selection->remove (*i);
3358                                 _added_time_axes.remove (*i);
3359                         }
3360
3361                         i = tmp;
3362                 }
3363
3364         }
3365         break;
3366
3367         case SelectionStartTrim:
3368
3369                 start = _editor->selection->time[_editor->clicked_selection].start;
3370                 end = _editor->selection->time[_editor->clicked_selection].end;
3371
3372                 if (pending_position > end) {
3373                         start = end;
3374                 } else {
3375                         start = pending_position;
3376                 }
3377                 break;
3378
3379         case SelectionEndTrim:
3380
3381                 start = _editor->selection->time[_editor->clicked_selection].start;
3382                 end = _editor->selection->time[_editor->clicked_selection].end;
3383
3384                 if (pending_position < start) {
3385                         end = start;
3386                 } else {
3387                         end = pending_position;
3388                 }
3389
3390                 break;
3391
3392         case SelectionMove:
3393
3394                 start = _editor->selection->time[_editor->clicked_selection].start;
3395                 end = _editor->selection->time[_editor->clicked_selection].end;
3396
3397                 length = end - start;
3398
3399                 start = pending_position;
3400                 _editor->snap_to (start);
3401
3402                 end = start + length;
3403
3404                 break;
3405         }
3406
3407         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3408                 _editor->start_canvas_autoscroll (1, 0);
3409         }
3410
3411         if (start != end) {
3412                 _editor->selection->replace (_editor->clicked_selection, start, end);
3413         }
3414
3415         if (_operation == SelectionMove) {
3416                 _editor->show_verbose_time_cursor(start, 10);
3417         } else {
3418                 _editor->show_verbose_time_cursor(pending_position, 10);
3419         }
3420 }
3421
3422 void
3423 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
3424 {
3425         Session* s = _editor->session();
3426
3427         if (movement_occurred) {
3428                 motion (event, false);
3429                 /* XXX this is not object-oriented programming at all. ick */
3430                 if (_editor->selection->time.consolidate()) {
3431                         _editor->selection->TimeChanged ();
3432                 }
3433
3434                 /* XXX what if its a music time selection? */
3435                 if (s && (s->config.get_auto_play() || (s->get_play_range() && s->transport_rolling()))) {
3436                         s->request_play_range (&_editor->selection->time, true);
3437                 }
3438
3439
3440         } else {
3441                 /* just a click, no pointer movement.*/
3442
3443                 if (Keyboard::no_modifier_keys_pressed (&event->button)) {
3444                         _editor->selection->clear_time();
3445                 }
3446
3447                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3448                         _editor->selection->set (_editor->clicked_axisview);
3449                 }
3450
3451                 if (s && s->get_play_range () && s->transport_rolling()) {
3452                         s->request_stop (false, false);
3453                 }
3454
3455         }
3456
3457         _editor->stop_canvas_autoscroll ();
3458 }
3459
3460 void
3461 SelectionDrag::aborted ()
3462 {
3463         /* XXX: TODO */
3464 }
3465
3466 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3467         : Drag (e, i),
3468           _operation (o),
3469           _copy (false)
3470 {
3471         _drag_rect = new ArdourCanvas::SimpleRect (*_editor->time_line_group, 0.0, 0.0, 0.0, _editor->physical_screen_height);
3472         _drag_rect->hide ();
3473
3474         _drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3475         _drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3476 }
3477
3478 void
3479 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3480 {
3481         if (_editor->session() == 0) {
3482                 return;
3483         }
3484
3485         Gdk::Cursor* cursor = 0;
3486
3487         if (!_editor->temp_location) {
3488                 _editor->temp_location = new Location;
3489         }
3490
3491         switch (_operation) {
3492         case CreateRangeMarker:
3493         case CreateTransportMarker:
3494         case CreateCDMarker:
3495
3496                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3497                         _copy = true;
3498                 } else {
3499                         _copy = false;
3500                 }
3501                 cursor = _editor->selector_cursor;
3502                 break;
3503         }
3504
3505         Drag::start_grab (event, cursor);
3506
3507         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3508 }
3509
3510 void
3511 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
3512 {
3513         nframes64_t start = 0;
3514         nframes64_t end = 0;
3515         ArdourCanvas::SimpleRect *crect;
3516
3517         switch (_operation) {
3518         case CreateRangeMarker:
3519                 crect = _editor->range_bar_drag_rect;
3520                 break;
3521         case CreateTransportMarker:
3522                 crect = _editor->transport_bar_drag_rect;
3523                 break;
3524         case CreateCDMarker:
3525                 crect = _editor->cd_marker_bar_drag_rect;
3526                 break;
3527         default:
3528                 cerr << "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()" << endl;
3529                 return;
3530                 break;
3531         }
3532
3533         nframes64_t const pf = adjusted_current_frame (event);
3534
3535         if (_operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
3536                 nframes64_t grab = grab_frame ();
3537                 _editor->snap_to (grab);
3538
3539                 if (pf < grab_frame()) {
3540                         start = pf;
3541                         end = grab;
3542                 } else {
3543                         end = pf;
3544                         start = grab;
3545                 }
3546
3547                 /* first drag: Either add to the selection
3548                    or create a new selection.
3549                 */
3550
3551                 if (first_move) {
3552
3553                         _editor->temp_location->set (start, end);
3554
3555                         crect->show ();
3556
3557                         update_item (_editor->temp_location);
3558                         _drag_rect->show();
3559                         //_drag_rect->raise_to_top();
3560
3561                 }
3562         }
3563
3564         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3565                 _editor->start_canvas_autoscroll (1, 0);
3566         }
3567
3568         if (start != end) {
3569                 _editor->temp_location->set (start, end);
3570
3571                 double x1 = _editor->frame_to_pixel (start);
3572                 double x2 = _editor->frame_to_pixel (end);
3573                 crect->property_x1() = x1;
3574                 crect->property_x2() = x2;
3575
3576                 update_item (_editor->temp_location);
3577         }
3578
3579         _editor->show_verbose_time_cursor (pf, 10);
3580
3581 }
3582
3583 void
3584 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
3585 {
3586         Location * newloc = 0;
3587         string rangename;
3588         int flags;
3589
3590         if (movement_occurred) {
3591                 motion (event, false);
3592                 _drag_rect->hide();
3593
3594                 switch (_operation) {
3595                 case CreateRangeMarker:
3596                 case CreateCDMarker:
3597                     {
3598                         _editor->begin_reversible_command (_("new range marker"));
3599                         XMLNode &before = _editor->session()->locations()->get_state();
3600                         _editor->session()->locations()->next_available_name(rangename,"unnamed");
3601                         if (_operation == CreateCDMarker) {
3602                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
3603                                 _editor->cd_marker_bar_drag_rect->hide();
3604                         }
3605                         else {
3606                                 flags = Location::IsRangeMarker;
3607                                 _editor->range_bar_drag_rect->hide();
3608                         }
3609                         newloc = new Location(_editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags);
3610                         _editor->session()->locations()->add (newloc, true);
3611                         XMLNode &after = _editor->session()->locations()->get_state();
3612                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
3613                         _editor->commit_reversible_command ();
3614                         break;
3615                     }
3616
3617                 case CreateTransportMarker:
3618                         // popup menu to pick loop or punch
3619                         _editor->new_transport_marker_context_menu (&event->button, _item);
3620                         break;
3621                 }
3622         } else {
3623                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
3624
3625                 if (Keyboard::no_modifier_keys_pressed (&event->button) && _operation != CreateCDMarker) {
3626
3627                         nframes64_t start;
3628                         nframes64_t end;
3629
3630                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
3631
3632                         if (end == max_frames) {
3633                                 end = _editor->session()->current_end_frame ();
3634                         }
3635
3636                         if (start == max_frames) {
3637                                 start = _editor->session()->current_start_frame ();
3638                         }
3639
3640                         switch (_editor->mouse_mode) {
3641                         case MouseObject:
3642                                 /* find the two markers on either side and then make the selection from it */
3643                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set);
3644                                 break;
3645
3646                         case MouseRange:
3647                                 /* find the two markers on either side of the click and make the range out of it */
3648                                 _editor->selection->set (start, end);
3649                                 break;
3650
3651                         default:
3652                                 break;
3653                         }
3654                 }
3655         }
3656
3657         _editor->stop_canvas_autoscroll ();
3658 }
3659
3660 void
3661 RangeMarkerBarDrag::aborted ()
3662 {
3663         /* XXX: TODO */
3664 }
3665
3666 void
3667 RangeMarkerBarDrag::update_item (Location* location)
3668 {
3669         double const x1 = _editor->frame_to_pixel (location->start());
3670         double const x2 = _editor->frame_to_pixel (location->end());
3671
3672         _drag_rect->property_x1() = x1;
3673         _drag_rect->property_x2() = x2;
3674 }
3675
3676 void
3677 MouseZoomDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3678 {
3679         Drag::start_grab (event, _editor->zoom_cursor);
3680         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3681 }
3682
3683 void
3684 MouseZoomDrag::motion (GdkEvent* event, bool first_move)
3685 {
3686         nframes64_t start;
3687         nframes64_t end;
3688
3689         nframes64_t const pf = adjusted_current_frame (event);
3690
3691         nframes64_t grab = grab_frame ();
3692         _editor->snap_to_with_modifier (grab, event);
3693
3694         /* base start and end on initial click position */
3695         if (pf < grab) {
3696                 start = pf;
3697                 end = grab;
3698         } else {
3699                 end = pf;
3700                 start = grab;
3701         }
3702
3703         if (start != end) {
3704
3705                 if (first_move) {
3706                         _editor->zoom_rect->show();
3707                         _editor->zoom_rect->raise_to_top();
3708                 }
3709
3710                 _editor->reposition_zoom_rect(start, end);
3711
3712                 _editor->show_verbose_time_cursor (pf, 10);
3713         }
3714 }
3715
3716 void
3717 MouseZoomDrag::finished (GdkEvent* event, bool movement_occurred)
3718 {
3719         if (movement_occurred) {
3720                 motion (event, false);
3721
3722                 if (grab_frame() < last_pointer_frame()) {
3723                         _editor->temporal_zoom_by_frame (grab_frame(), last_pointer_frame(), "mouse zoom");
3724                 } else {
3725                         _editor->temporal_zoom_by_frame (last_pointer_frame(), grab_frame(), "mouse zoom");
3726                 }
3727         } else {
3728                 _editor->temporal_zoom_to_frame (false, grab_frame());
3729                 /*
3730                 temporal_zoom_step (false);
3731                 center_screen (grab_frame());
3732                 */
3733         }
3734
3735         _editor->zoom_rect->hide();
3736 }
3737
3738 void
3739 MouseZoomDrag::aborted ()
3740 {
3741         _editor->zoom_rect->hide ();
3742 }
3743
3744 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
3745         : Drag (e, i)
3746 {
3747         CanvasNoteEvent*     cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3748         region = &cnote->region_view();
3749 }
3750
3751 void
3752 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3753 {
3754         Drag::start_grab (event);
3755
3756         drag_delta_x = 0;
3757         drag_delta_note = 0;
3758
3759         double event_x;
3760         double event_y;
3761
3762         event_x = _drags->current_pointer_x();
3763         event_y = _drags->current_pointer_y();
3764
3765         _item->property_parent().get_value()->w2i(event_x, event_y);
3766
3767         last_x = region->snap_to_pixel(event_x);
3768         last_y = event_y;
3769
3770         CanvasNoteEvent* cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3771
3772         if (!(was_selected = cnote->selected())) {
3773
3774                 /* tertiary-click means extend selection - we'll do that on button release,
3775                    so don't add it here, because otherwise we make it hard to figure
3776                    out the "extend-to" range.
3777                 */
3778
3779                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
3780
3781                 if (!extend) {
3782                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
3783
3784                         if (add) {
3785                                 region->note_selected (cnote, true);
3786                         } else {
3787                                 region->unique_select (cnote);
3788                         }
3789                 }
3790         }
3791 }
3792
3793 void
3794 NoteDrag::motion (GdkEvent*, bool)
3795 {
3796         MidiStreamView* streamview = region->midi_stream_view();
3797         double event_x;
3798         double event_y;
3799
3800         event_x = _drags->current_pointer_x();
3801         event_y = _drags->current_pointer_y();
3802
3803         _item->property_parent().get_value()->w2i(event_x, event_y);
3804
3805         event_x = region->snap_to_pixel(event_x);
3806
3807         double dx     = event_x - last_x;
3808         double dy     = event_y - last_y;
3809         last_x = event_x;
3810
3811         drag_delta_x += dx;
3812
3813         // Snap to note rows
3814
3815         if (abs (dy) < streamview->note_height()) {
3816                 dy = 0.0;
3817         } else {
3818                 int8_t this_delta_note;
3819                 if (dy > 0) {
3820                         this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
3821                 } else {
3822                         this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
3823                 }
3824                 drag_delta_note -= this_delta_note;
3825                 dy = streamview->note_height() * this_delta_note;
3826                 last_y = last_y + dy;
3827         }
3828
3829         if (dx || dy) {
3830
3831                 CanvasNoteEvent* cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3832                 Evoral::MusicalTime new_time;
3833
3834                 if (drag_delta_x) {
3835                         nframes64_t start_frames = region->beats_to_frames(cnote->note()->time());
3836                         if (drag_delta_x >= 0) {
3837                                 start_frames += region->snap_frame_to_frame(_editor->pixel_to_frame(drag_delta_x));
3838                         } else {
3839                                 start_frames -= region->snap_frame_to_frame(_editor->pixel_to_frame(-drag_delta_x));
3840                         }
3841                         new_time = region->frames_to_beats(start_frames);
3842                 } else {
3843                         new_time = cnote->note()->time();
3844                 }
3845
3846                 boost::shared_ptr<Evoral::Note<Evoral::MusicalTime> > check_note (
3847                         new Evoral::Note<Evoral::MusicalTime> (cnote->note()->channel(),
3848                                                                new_time,
3849                                                                cnote->note()->length(),
3850                                                                cnote->note()->note() + drag_delta_note,
3851                                                                cnote->note()->velocity()));
3852
3853                 region->move_selection (dx, dy);
3854
3855                 char buf[12];
3856                 snprintf (buf, sizeof (buf), "%s (%d)", Evoral::midi_note_name (cnote->note()->note()).c_str(),
3857                           (int) floor ((cnote->note()->note() + drag_delta_note)));
3858                 _editor->show_verbose_canvas_cursor_with (buf);
3859         }
3860 }
3861
3862 void
3863 NoteDrag::finished (GdkEvent* ev, bool moved)
3864 {
3865         ArdourCanvas::CanvasNote* cnote = dynamic_cast<ArdourCanvas::CanvasNote*>(_item);
3866
3867         if (!moved) {
3868                 if (_editor->current_mouse_mode() == Editing::MouseObject) {
3869
3870                         if (was_selected) {
3871                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
3872                                 if (add) {
3873                                         region->note_deselected (cnote);
3874                                 }
3875                         } else {
3876                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
3877                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
3878
3879                                 if (!extend && !add && region->selection_size() > 1) {
3880                                         region->unique_select(cnote);
3881                                 } else if (extend) {
3882                                         region->note_selected (cnote, true, true);
3883                                 } else {
3884                                         /* it was added during button press */
3885                                 }
3886                         }
3887                 }
3888         } else {
3889                 region->note_dropped (cnote, drag_delta_x, drag_delta_note);
3890         }
3891 }
3892
3893 void
3894 NoteDrag::aborted ()
3895 {
3896         /* XXX: TODO */
3897 }
3898
3899 AutomationRangeDrag::AutomationRangeDrag (Editor* e, ArdourCanvas::Item* i, list<AudioRange> const & r)
3900         : Drag (e, i)
3901         , _ranges (r)
3902         , _nothing_to_drag (false)
3903 {
3904         _atav = reinterpret_cast<AutomationTimeAxisView*> (_item->get_data ("trackview"));
3905         assert (_atav);
3906
3907         _line = _atav->line ();
3908 }
3909
3910 void
3911 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3912 {
3913         Drag::start_grab (event, cursor);
3914
3915         list<ControlPoint*> points;
3916
3917         XMLNode* state = &_line->get_state ();
3918
3919         if (_ranges.empty()) {
3920
3921                 uint32_t const N = _line->npoints ();
3922                 for (uint32_t i = 0; i < N; ++i) {
3923                         points.push_back (_line->nth (i));
3924                 }
3925
3926         } else {
3927
3928                 boost::shared_ptr<AutomationList> the_list = _line->the_list ();
3929                 for (list<AudioRange>::const_iterator j = _ranges.begin(); j != _ranges.end(); ++j) {
3930
3931                         /* fade into and out of the region that we're dragging;
3932                            64 samples length plucked out of thin air.
3933                         */
3934                         nframes64_t const h = (j->start + j->end) / 2;
3935                         nframes64_t a = j->start + 64;
3936                         if (a > h) {
3937                                 a = h;
3938                         }
3939                         nframes64_t b = j->end - 64;
3940                         if (b < h) {
3941                                 b = h;
3942                         }
3943
3944                         the_list->add (j->start, the_list->eval (j->start));
3945                         _line->add_always_in_view (j->start);
3946                         the_list->add (a, the_list->eval (a));
3947                         _line->add_always_in_view (a);
3948                         the_list->add (b, the_list->eval (b));
3949                         _line->add_always_in_view (b);
3950                         the_list->add (j->end, the_list->eval (j->end));
3951                         _line->add_always_in_view (j->end);
3952                 }
3953
3954                 uint32_t const N = _line->npoints ();
3955                 for (uint32_t i = 0; i < N; ++i) {
3956
3957                         ControlPoint* p = _line->nth (i);
3958
3959                         list<AudioRange>::const_iterator j = _ranges.begin ();
3960                         while (j != _ranges.end() && (j->start >= (*p->model())->when || j->end <= (*p->model())->when)) {
3961                                 ++j;
3962                         }
3963
3964                         if (j != _ranges.end()) {
3965                                 points.push_back (p);
3966                         }
3967                 }
3968         }
3969
3970         if (points.empty()) {
3971                 _nothing_to_drag = true;
3972                 return;
3973         }
3974
3975         _line->start_drag_multiple (points, 1 - (_drags->current_pointer_y() / _line->height ()), state);
3976 }
3977
3978 void
3979 AutomationRangeDrag::motion (GdkEvent* event, bool first_move)
3980 {
3981         if (_nothing_to_drag) {
3982                 return;
3983         }
3984
3985         float const f = 1 - (_drags->current_pointer_y() / _line->height());
3986
3987         /* we are ignoring x position for this drag, so we can just pass in anything */
3988         _line->drag_motion (0, f, true, false);
3989 }
3990
3991 void
3992 AutomationRangeDrag::finished (GdkEvent* event, bool)
3993 {
3994         if (_nothing_to_drag) {
3995                 return;
3996         }
3997
3998         motion (event, false);
3999         _line->end_drag ();
4000         _line->clear_always_in_view ();
4001 }
4002
4003 void
4004 AutomationRangeDrag::aborted ()
4005 {
4006         _line->clear_always_in_view ();
4007         _line->reset ();
4008 }
4009
4010 DraggingView::DraggingView (RegionView* v)
4011         : view (v)
4012 {
4013         initial_y = v->get_canvas_group()->property_y ();
4014 }