gtk2_ardour/editor_canvas.cc

   1 /*
   2     Copyright (C) 2005 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 #include <libgnomecanvasmm/init.h>
  21 #include <jack/types.h>
  22 #include <gtkmm2ext/utils.h>
  23
  24 #include <ardour/audioregion.h>
  25
  26 #include "ardour_ui.h"
  27 #include "editor.h"
  28 #include "waveview.h"
  29 #include "simplerect.h"
  30 #include "simpleline.h"
  31 #include "waveview_p.h"
  32 #include "simplerect_p.h"
  33 #include "simpleline_p.h"
  34 #include "canvas_impl.h"
  35 #include "editing.h"
  36 #include "rgb_macros.h"
  37 #include "utils.h"
  38 #include "time_axis_view.h"
  39 #include "audio_time_axis.h"
  40
  41 #ifdef WITH_CMT
  42 #include "imageframe.h"
  43 #include "imageframe_p.h"
  44 #endif
  45
  46 #include "i18n.h"
  47
  48 using namespace std;
  49 using namespace sigc;
  50 using namespace ARDOUR;
  51 using namespace PBD;
  52 using namespace Gtk;
  53 using namespace Glib;
  54 using namespace Gtkmm2ext;
  55 using namespace Editing;
  56
  57 /* XXX this is a hack. it ought to be the maximum value of an nframes_t */
  58
  59 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
  60
  61 extern "C"
  62 {
  63
  64 GType gnome_canvas_simpleline_get_type(void);
  65 GType gnome_canvas_simplerect_get_type(void);
  66 GType gnome_canvas_waveview_get_type(void);
  67
  68 #ifdef WITH_CMT
  69 GType gnome_canvas_imageframe_get_type(void);
  70 #endif
  71
  72 }
  73
  74 static void ardour_canvas_type_init()
  75 {
  76         // Map gtypes to gtkmm wrapper-creation functions:
  77
  78         Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
  79         Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
  80         Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
  81
  82 #ifdef WITH_CMT
  83         Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
  84 #endif
  85
  86         // Register the gtkmm gtypes:
  87
  88         (void) Gnome::Canvas::WaveView::get_type();
  89         (void) Gnome::Canvas::SimpleLine::get_type();
  90         (void) Gnome::Canvas::SimpleRect::get_type();
  91
  92 #ifdef WITH_CMT
  93         (void) Gnome::Canvas::ImageFrame::get_type();
  94 #endif
  95 }
  96
  97 void
  98 Editor::initialize_canvas ()
  99 {
 100         ArdourCanvas::init ();
 101         ardour_canvas_type_init ();
 102
 103         /* don't try to center the canvas */
 104
 105         track_canvas.set_center_scroll_region (false);
 106         track_canvas.set_dither         (Gdk::RGB_DITHER_NONE);
 107
 108         /* need to handle 4 specific types of events as catch-alls */
 109
 110         track_canvas.signal_scroll_event().connect (mem_fun (*this, &Editor::track_canvas_scroll_event));
 111         track_canvas.signal_motion_notify_event().connect (mem_fun (*this, &Editor::track_canvas_motion_notify_event));
 112         track_canvas.signal_button_press_event().connect (mem_fun (*this, &Editor::track_canvas_button_press_event));
 113         track_canvas.signal_button_release_event().connect (mem_fun (*this, &Editor::track_canvas_button_release_event));
 114
 115         track_canvas.set_name ("EditorMainCanvas");
 116         track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
 117         track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
 118         track_canvas.set_flags (CAN_FOCUS);
 119
 120         /* set up drag-n-drop */
 121
 122         vector<TargetEntry> target_table;
 123
 124         // Drag-N-Drop from the region list can generate this target
 125         target_table.push_back (TargetEntry ("regions"));
 126
 127         target_table.push_back (TargetEntry ("text/plain"));
 128         target_table.push_back (TargetEntry ("text/uri-list"));
 129         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 130
 131         track_canvas.drag_dest_set (target_table);
 132         track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
 133
 134         /* stuff for the verbose canvas cursor */
 135
 136         Pango::FontDescription font = get_font_for_style (N_("VerboseCanvasCursor"));
 137
 138         verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
 139         verbose_canvas_cursor->property_font_desc() = font;
 140         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 141
 142         verbose_cursor_visible = false;
 143
 144         /* a group to hold time (measure) lines */
 145
 146         time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 147         cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 148
 149         time_canvas.set_name ("EditorTimeCanvas");
 150         time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
 151         time_canvas.set_flags (CAN_FOCUS);
 152         time_canvas.set_center_scroll_region (false);
 153         time_canvas.set_dither          (Gdk::RGB_DITHER_NONE);
 154
 155         meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 156         tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
 157         marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 158         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 159         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
 160
 161         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 162         tempo_bar->property_outline_what() = (0x1 | 0x8);
 163         tempo_bar->property_outline_pixels() = 1;
 164
 165         meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 166         meter_bar->property_outline_what() = (0x1 | 0x8);
 167         meter_bar->property_outline_pixels() = 1;
 168
 169         marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 170         marker_bar->property_outline_what() = (0x1 | 0x8);
 171         marker_bar->property_outline_pixels() = 1;
 172
 173         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 174         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 175         range_marker_bar->property_outline_pixels() = 1;
 176
 177         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 178         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 179         transport_marker_bar->property_outline_pixels() = 1;
 180
 181         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 182         range_bar_drag_rect->property_outline_pixels() = 0;
 183         range_bar_drag_rect->hide ();
 184
 185         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 186         transport_bar_drag_rect->property_outline_pixels() = 0;
 187         transport_bar_drag_rect->hide ();
 188
 189         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 190         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 191
 192         marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
 193         marker_drag_line->property_width_pixels() = 1;
 194         marker_drag_line->property_points() = marker_drag_line_points;
 195         marker_drag_line->hide();
 196
 197         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 198         range_marker_drag_rect->hide ();
 199
 200         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 201         transport_loop_range_rect->property_outline_pixels() = 1;
 202         transport_loop_range_rect->hide();
 203
 204         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 205         transport_punch_range_rect->property_outline_pixels() = 0;
 206         transport_punch_range_rect->hide();
 207
 208         transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
 209
 210         transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
 211         transport_punchin_line->property_x1() = 0.0;
 212         transport_punchin_line->property_y1() = 0.0;
 213         transport_punchin_line->property_x2() = 0.0;
 214         transport_punchin_line->property_y2() = 0.0;
 215         transport_punchin_line->hide ();
 216
 217         transport_punchout_line  = new ArdourCanvas::SimpleLine (*time_line_group);
 218         transport_punchout_line->property_x1() = 0.0;
 219         transport_punchout_line->property_y1() = 0.0;
 220         transport_punchout_line->property_x2() = 0.0;
 221         transport_punchout_line->property_y2() = 0.0;
 222         transport_punchout_line->hide();
 223
 224         // used to show zoom mode active zooming
 225         zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 226         zoom_rect->property_outline_pixels() = 1;
 227         zoom_rect->hide();
 228
 229         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 230
 231         // used as rubberband rect
 232         rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 233         rubberband_rect->property_outline_pixels() = 1;
 234         rubberband_rect->hide();
 235
 236         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 237         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 238         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 239         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 240         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 241
 242         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
 243         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
 244
 245         double time_height = timebar_height * 5;
 246         double time_width = FLT_MAX/frames_per_unit;
 247         time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
 248
 249         edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
 250         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 251
 252         initial_ruler_update_required = true;
 253         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 254
 255         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 256         color_handler();
 257
 258 }
 259
 260 void
 261 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 262 {
 263         canvas_allocation = alloc;
 264
 265         if (!initial_ruler_update_required) {
 266                 if (!canvas_idle_queued) {
 267                         /* call this first so that we do stuff before any pending redraw */
 268                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 269                         canvas_idle_queued = true;
 270                 }
 271                 return;
 272         }
 273
 274         initial_ruler_update_required = false;
 275
 276         track_canvas_size_allocated ();
 277 }
 278
 279 bool
 280 Editor::track_canvas_size_allocated ()
 281 {
 282         if (canvas_idle_queued) {
 283                 canvas_idle_queued = false;
 284         }
 285
 286         canvas_width = canvas_allocation.get_width();
 287         canvas_height = canvas_allocation.get_height();
 288
 289         full_canvas_height = canvas_height;
 290
 291         if (session) {
 292                 TrackViewList::iterator i;
 293                 double height = 0;
 294
 295                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 296                         if ((*i)->control_parent) {
 297                                 height += (*i)->effective_height;
 298                         }
 299                 }
 300
 301                 full_canvas_height = height;
 302         }
 303
 304         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 305         edit_cursor->set_position (edit_cursor->current_frame);
 306         playhead_cursor->set_position (playhead_cursor->current_frame);
 307
 308         reset_hscrollbar_stepping ();
 309         reset_scrolling_region ();
 310
 311         if (edit_cursor) edit_cursor->set_length (canvas_height);
 312         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 313
 314         if (marker_drag_line) {
 315                 marker_drag_line_points.back().set_y(canvas_height);
 316                 marker_drag_line->property_points() = marker_drag_line_points;
 317         }
 318
 319         if (range_marker_drag_rect) {
 320                 range_marker_drag_rect->property_y1() = 0.0;
 321                 range_marker_drag_rect->property_y2() = canvas_height;
 322         }
 323
 324         if (transport_loop_range_rect) {
 325                 transport_loop_range_rect->property_y1() = 0.0;
 326                 transport_loop_range_rect->property_y2() = canvas_height;
 327         }
 328
 329         if (transport_punch_range_rect) {
 330                 transport_punch_range_rect->property_y1() = 0.0;
 331                 transport_punch_range_rect->property_y2() = canvas_height;
 332         }
 333
 334         if (transport_punchin_line) {
 335                 transport_punchin_line->property_y1() = 0.0;
 336                 transport_punchin_line->property_y2() = canvas_height;
 337         }
 338
 339         if (transport_punchout_line) {
 340                 transport_punchout_line->property_y1() = 0.0;
 341                 transport_punchout_line->property_y2() = canvas_height;
 342         }
 343
 344         update_fixed_rulers();
 345         redisplay_tempo (true);
 346
 347         Resized (); /* EMIT_SIGNAL */
 348
 349         return false;
 350 }
 351
 352 void
 353 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 354 {
 355         TreeModel::Children rows = route_display_model->children();
 356         TreeModel::Children::iterator i;
 357         double pos;
 358
 359         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 360                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 361                 if (tv != 0 && !tv->hidden()) {
 362                         pos += tv->effective_height;
 363                 }
 364         }
 365
 366         double last_canvas_unit =  last_canvas_frame / frames_per_unit;
 367
 368         track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
 369
 370         // XXX what is the correct height value for the time canvas ? this overstates it
 371         time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
 372
 373         controls_layout.queue_resize();
 374 }
 375
 376 void
 377 Editor::controls_layout_size_request (Requisition* req)
 378 {
 379         TreeModel::Children rows = route_display_model->children();
 380         TreeModel::Children::iterator i;
 381         double pos;
 382
 383         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 384                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 385                 if (tv != 0) {
 386                         pos += tv->effective_height;
 387                 }
 388         }
 389
 390         RefPtr<Gdk::Screen> screen = get_screen();
 391
 392         if (!screen) {
 393                 screen = Gdk::Screen::get_default();
 394         }
 395
 396         /* never let the width of the controls area shrink horizontally */
 397
 398         edit_controls_vbox.check_resize();
 399
 400         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 401
 402         /* don't get too big. the fudge factors here are just guesses */
 403
 404         req->width = min (req->width, screen->get_width() - 300);
 405         req->height = min ((gint) pos, (screen->get_height() - 400));
 406
 407         /* this one is important: it determines how big the layout thinks it really is, as
 408            opposed to what it displays on the screen
 409         */
 410
 411         controls_layout.set_size (req->width, (gint) pos);
 412 }
 413
 414 bool
 415 Editor::track_canvas_map_handler (GdkEventAny* ev)
 416 {
 417         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 418         return false;
 419 }
 420
 421 bool
 422 Editor::time_canvas_map_handler (GdkEventAny* ev)
 423 {
 424         time_canvas.get_window()->set_cursor (*timebar_cursor);
 425         return false;
 426 }
 427
 428 void
 429 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 430                                          int x, int y,
 431                                          const SelectionData& data,
 432                                          guint info, guint time)
 433 {
 434         if (data.get_target() == "regions") {
 435                 drop_regions (context, x, y, data, info, time);
 436         } else {
 437                 drop_paths (context, x, y, data, info, time);
 438         }
 439 }
 440
 441 void
 442 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 443                     int x, int y,
 444                     const SelectionData& data,
 445                     guint info, guint time)
 446 {
 447         TimeAxisView* tvp;
 448         RouteTimeAxisView* tv;
 449         double cy;
 450         vector<ustring> paths;
 451         string spath;
 452         GdkEvent ev;
 453         nframes_t frame;
 454
 455         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 456                 goto out;
 457         }
 458
 459         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 460          */
 461
 462         double wx;
 463         double wy;
 464
 465         track_canvas.window_to_world (x, y, wx, wy);
 466         wx += horizontal_adjustment.get_value();
 467         wy += vertical_adjustment.get_value();
 468
 469         ev.type = GDK_BUTTON_RELEASE;
 470         ev.button.x = wx;
 471         ev.button.y = wy;
 472
 473         frame = event_frame (&ev, 0, &cy);
 474
 475         snap_to (frame);
 476
 477         if ((tvp = trackview_by_y_position (cy)) == 0) {
 478
 479                 /* drop onto canvas background: create new tracks */
 480
 481                 nframes_t pos = 0;
 482                 do_embed (paths, false, ImportAsTrack, 0, pos, false);
 483
 484         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 485
 486                 /* check that its an audio track, not a bus */
 487
 488                 if (tv->get_diskstream()) {
 489                         do_embed (paths, false, ImportToTrack, tv->audio_track().get(), frame, true);
 490                 }
 491         }
 492
 493   out:
 494         context->drag_finish (true, false, time);
 495 }
 496
 497 void
 498 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 499                       int x, int y,
 500                       const SelectionData& data,
 501                       guint info, guint time)
 502 {
 503         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 504                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 505
 506         for (uint32_t i = 0; i < sr->cnt; ++i) {
 507
 508                 boost::shared_ptr<Region> r = sr->data[i];
 509
 510                 insert_region_list_drag (r, x, y);
 511         }
 512
 513         context->drag_finish (true, false, time);
 514 }
 515
 516 void
 517 Editor::maybe_autoscroll (GdkEvent* event)
 518 {
 519         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 520         nframes_t frame = drag_info.current_pointer_frame;
 521         bool startit = false;
 522
 523         static int last_autoscroll_direction = 0;
 524
 525         if (frame > rightmost_frame) {
 526
 527                 if (rightmost_frame < max_frames) {
 528                         autoscroll_direction = 1;
 529                         startit = true;
 530                 }
 531
 532         } else if (frame < leftmost_frame) {
 533
 534                 if (leftmost_frame > 0) {
 535                         autoscroll_direction = -1;
 536                         startit = true;
 537                 }
 538
 539         } else {
 540
 541                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 542                         autoscroll_direction = -1;
 543                 } else {
 544                         autoscroll_direction = 1;
 545                 }
 546         }
 547
 548
 549         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 550                 stop_canvas_autoscroll ();
 551         }
 552
 553         if (startit && autoscroll_timeout_tag < 0) {
 554                 start_canvas_autoscroll (autoscroll_direction);
 555         }
 556
 557         last_autoscroll_direction = autoscroll_direction;
 558 }
 559
 560 gint
 561 Editor::_autoscroll_canvas (void *arg)
 562 {
 563         return ((Editor *) arg)->autoscroll_canvas ();
 564 }
 565
 566 bool
 567 Editor::autoscroll_canvas ()
 568 {
 569         nframes_t new_frame;
 570         nframes_t limit = max_frames - current_page_frames();
 571         GdkEventMotion ev;
 572         nframes_t target_frame;
 573
 574         if (autoscroll_direction < 0) {
 575                 if (leftmost_frame < autoscroll_distance) {
 576                         new_frame = 0;
 577                 } else {
 578                         new_frame = leftmost_frame - autoscroll_distance;
 579                 }
 580                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 581         } else {
 582                 if (leftmost_frame > limit - autoscroll_distance) {
 583                         new_frame = limit;
 584                 } else {
 585                         new_frame = leftmost_frame + autoscroll_distance;
 586                 }
 587                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 588         }
 589
 590         /* now fake a motion event to get the object that is being dragged to move too */
 591
 592         ev.type = GDK_MOTION_NOTIFY;
 593         ev.state &= Gdk::BUTTON1_MASK;
 594         ev.x = frame_to_unit (target_frame);
 595         ev.y = drag_info.current_pointer_y;
 596         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 597
 598         if (new_frame == 0 || new_frame == limit) {
 599                 /* we are done */
 600                 return false;
 601         }
 602
 603         autoscroll_cnt++;
 604
 605         if (autoscroll_cnt == 1) {
 606
 607                 /* connect the timeout so that we get called repeatedly */
 608
 609                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 610                 return false;
 611
 612         }
 613
 614         if (new_frame != leftmost_frame) {
 615                 reset_x_origin (new_frame);
 616         }
 617
 618         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 619
 620                 /* after about a while, speed up a bit by changing the timeout interval */
 621
 622                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 623
 624         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 625
 626                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 627
 628         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 629
 630                 /* after about another while, speed up by increasing the shift per callback */
 631
 632                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 633
 634         }
 635
 636         return true;
 637 }
 638
 639 void
 640 Editor::start_canvas_autoscroll (int dir)
 641 {
 642         if (!session || autoscroll_active) {
 643                 return;
 644         }
 645
 646         stop_canvas_autoscroll ();
 647
 648         autoscroll_active = true;
 649         autoscroll_direction = dir;
 650         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 651         autoscroll_cnt = 0;
 652
 653         /* do it right now, which will start the repeated callbacks */
 654
 655         autoscroll_canvas ();
 656 }
 657
 658 void
 659 Editor::stop_canvas_autoscroll ()
 660 {
 661         if (autoscroll_timeout_tag >= 0) {
 662                 g_source_remove (autoscroll_timeout_tag);
 663                 autoscroll_timeout_tag = -1;
 664         }
 665
 666         autoscroll_active = false;
 667 }
 668
 669 gint
 670 Editor::left_track_canvas (GdkEventCrossing *ev)
 671 {
 672         set_entered_track (0);
 673         set_entered_regionview (0);
 674         return FALSE;
 675 }
 676
 677
 678 void
 679 Editor::canvas_horizontally_scrolled ()
 680 {
 681         /* this is the core function that controls horizontal scrolling of the canvas. it is called
 682            whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
 683            idle handler, which is important because tempo_map_changed() should issue redraws immediately
 684            and not defer them to an idle handler.
 685         */
 686
 687         leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 688         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 689
 690         if (rightmost_frame > last_canvas_frame) {
 691                 last_canvas_frame = rightmost_frame;
 692                 reset_scrolling_region ();
 693         }
 694
 695         update_fixed_rulers ();
 696
 697         redisplay_tempo (!_dragging_hscrollbar);
 698 }
 699
 700 void
 701 Editor::color_handler()
 702 {
 703         edit_cursor->canvas_item.property_fill_color_rgba() = Config->canvasvar_EditCursor.get();
 704         playhead_cursor->canvas_item.property_fill_color_rgba() = Config->canvasvar_PlayHead.get();
 705         verbose_canvas_cursor->property_fill_color_rgba() = Config->canvasvar_VerboseCanvasCursor.get();
 706
 707         meter_bar->property_fill_color_rgba() = Config->canvasvar_MeterBar.get();
 708         meter_bar->property_outline_color_rgba() = Config->canvasvar_MeterBar.get();
 709
 710         tempo_bar->property_fill_color_rgba() = Config->canvasvar_TempoBar.get();
 711         tempo_bar->property_outline_color_rgba() = Config->canvasvar_TempoBar.get();
 712
 713         marker_bar->property_fill_color_rgba() = Config->canvasvar_MarkerBar.get();
 714         marker_bar->property_outline_color_rgba() = Config->canvasvar_MarkerBar.get();
 715
 716         range_marker_bar->property_fill_color_rgba() = Config->canvasvar_RangeMarkerBar.get();
 717         range_marker_bar->property_outline_color_rgba() = Config->canvasvar_RangeMarkerBar.get();
 718
 719         transport_marker_bar->property_fill_color_rgba() = Config->canvasvar_TransportMarkerBar.get();
 720         transport_marker_bar->property_outline_color_rgba() = Config->canvasvar_TransportMarkerBar.get();
 721
 722         range_bar_drag_rect->property_fill_color_rgba() = Config->canvasvar_RangeDragBarRect.get();
 723         range_bar_drag_rect->property_outline_color_rgba() = Config->canvasvar_RangeDragBarRect.get();
 724
 725         transport_bar_drag_rect->property_fill_color_rgba() = Config->canvasvar_TransportDragRect.get();
 726         transport_bar_drag_rect->property_outline_color_rgba() = Config->canvasvar_TransportDragRect.get();
 727
 728         marker_drag_line->property_fill_color_rgba() = Config->canvasvar_MarkerDragLine.get();
 729
 730         range_marker_drag_rect->property_fill_color_rgba() = Config->canvasvar_RangeDragRect.get();
 731         range_marker_drag_rect->property_outline_color_rgba() = Config->canvasvar_RangeDragRect.get();
 732
 733         transport_loop_range_rect->property_fill_color_rgba() = Config->canvasvar_TransportLoopRect.get();
 734         transport_loop_range_rect->property_outline_color_rgba() = Config->canvasvar_TransportLoopRect.get();
 735
 736         transport_punch_range_rect->property_fill_color_rgba() = Config->canvasvar_TransportPunchRect.get();
 737         transport_punch_range_rect->property_outline_color_rgba() = Config->canvasvar_TransportPunchRect.get();
 738
 739         transport_punchin_line->property_color_rgba() = Config->canvasvar_PunchLine.get();
 740         transport_punchout_line->property_color_rgba() = Config->canvasvar_PunchLine.get();
 741
 742         zoom_rect->property_fill_color_rgba() = Config->canvasvar_ZoomRect.get();
 743         zoom_rect->property_outline_color_rgba() = Config->canvasvar_ZoomRect.get();
 744
 745         rubberband_rect->property_outline_color_rgba() = Config->canvasvar_RubberBandRect.get();
 746         rubberband_rect->property_fill_color_rgba() = (guint32) Config->canvasvar_RubberBandRect.get();
 747
 748         location_marker_color = Config->canvasvar_LocationMarker.get();
 749         location_range_color = Config->canvasvar_LocationRange.get();
 750         location_cd_marker_color = Config->canvasvar_LocationCDMarker.get();
 751         location_loop_color = Config->canvasvar_LocationLoop.get();
 752         location_punch_color = Config->canvasvar_LocationPunch.get();
 753
 754         refresh_location_display ();
 755         redisplay_tempo (true);
 756
 757         if (session)
 758                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 759 }
 760