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         delete font;
 143
 144         verbose_cursor_visible = false;
 145
 146         /* a group to hold time (measure) lines */
 147
 148         time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 149         cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 150
 151         time_canvas.set_name ("EditorTimeCanvas");
 152         time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
 153         time_canvas.set_flags (CAN_FOCUS);
 154         time_canvas.set_center_scroll_region (false);
 155         time_canvas.set_dither          (Gdk::RGB_DITHER_NONE);
 156
 157         meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 158         tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
 159         marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 160         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 161         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
 162
 163         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 164         tempo_bar->property_outline_what() = (0x1 | 0x8);
 165         tempo_bar->property_outline_pixels() = 1;
 166
 167         meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 168         meter_bar->property_outline_what() = (0x1 | 0x8);
 169         meter_bar->property_outline_pixels() = 1;
 170
 171         marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 172         marker_bar->property_outline_what() = (0x1 | 0x8);
 173         marker_bar->property_outline_pixels() = 1;
 174
 175         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 176         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 177         range_marker_bar->property_outline_pixels() = 1;
 178
 179         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 180         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 181         transport_marker_bar->property_outline_pixels() = 1;
 182
 183         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 184         range_bar_drag_rect->property_outline_pixels() = 0;
 185         range_bar_drag_rect->hide ();
 186
 187         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 188         transport_bar_drag_rect->property_outline_pixels() = 0;
 189         transport_bar_drag_rect->hide ();
 190
 191         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 192         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 193
 194         marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
 195         marker_drag_line->property_width_pixels() = 1;
 196         marker_drag_line->property_points() = marker_drag_line_points;
 197         marker_drag_line->hide();
 198
 199         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 200         range_marker_drag_rect->hide ();
 201
 202         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 203         transport_loop_range_rect->property_outline_pixels() = 1;
 204         transport_loop_range_rect->hide();
 205
 206         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 207         transport_punch_range_rect->property_outline_pixels() = 0;
 208         transport_punch_range_rect->hide();
 209
 210         transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
 211
 212         transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
 213         transport_punchin_line->property_x1() = 0.0;
 214         transport_punchin_line->property_y1() = 0.0;
 215         transport_punchin_line->property_x2() = 0.0;
 216         transport_punchin_line->property_y2() = 0.0;
 217         transport_punchin_line->hide ();
 218
 219         transport_punchout_line  = new ArdourCanvas::SimpleLine (*time_line_group);
 220         transport_punchout_line->property_x1() = 0.0;
 221         transport_punchout_line->property_y1() = 0.0;
 222         transport_punchout_line->property_x2() = 0.0;
 223         transport_punchout_line->property_y2() = 0.0;
 224         transport_punchout_line->hide();
 225
 226         // used to show zoom mode active zooming
 227         zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 228         zoom_rect->property_outline_pixels() = 1;
 229         zoom_rect->hide();
 230
 231         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 232
 233         // used as rubberband rect
 234         rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 235         rubberband_rect->property_outline_pixels() = 1;
 236         rubberband_rect->hide();
 237
 238         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 239         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 240         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 241         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 242         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 243
 244         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
 245         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
 246
 247         double time_height = timebar_height * 5;
 248         double time_width = FLT_MAX/frames_per_unit;
 249         time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
 250
 251         edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
 252         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 253
 254         initial_ruler_update_required = true;
 255         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 256
 257         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 258         color_handler();
 259
 260 }
 261
 262 void
 263 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 264 {
 265         canvas_allocation = alloc;
 266
 267         if (!initial_ruler_update_required) {
 268                 if (!canvas_idle_queued) {
 269                         /* call this first so that we do stuff before any pending redraw */
 270                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 271                         canvas_idle_queued = true;
 272                 }
 273                 return;
 274         }
 275
 276         initial_ruler_update_required = false;
 277
 278         track_canvas_size_allocated ();
 279 }
 280
 281 bool
 282 Editor::track_canvas_size_allocated ()
 283 {
 284         if (canvas_idle_queued) {
 285                 canvas_idle_queued = false;
 286         }
 287
 288         canvas_width = canvas_allocation.get_width();
 289         canvas_height = canvas_allocation.get_height();
 290
 291         full_canvas_height = canvas_height;
 292
 293         if (session) {
 294                 TrackViewList::iterator i;
 295                 double height = 0;
 296
 297                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 298                         if ((*i)->control_parent) {
 299                                 height += (*i)->effective_height;
 300                         }
 301                 }
 302
 303                 full_canvas_height = height;
 304         }
 305
 306         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 307         edit_cursor->set_position (edit_cursor->current_frame);
 308         playhead_cursor->set_position (playhead_cursor->current_frame);
 309
 310         reset_hscrollbar_stepping ();
 311         reset_scrolling_region ();
 312
 313         if (edit_cursor) edit_cursor->set_length (canvas_height);
 314         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 315
 316         if (marker_drag_line) {
 317                 marker_drag_line_points.back().set_y(canvas_height);
 318                 marker_drag_line->property_points() = marker_drag_line_points;
 319         }
 320
 321         if (range_marker_drag_rect) {
 322                 range_marker_drag_rect->property_y1() = 0.0;
 323                 range_marker_drag_rect->property_y2() = canvas_height;
 324         }
 325
 326         if (transport_loop_range_rect) {
 327                 transport_loop_range_rect->property_y1() = 0.0;
 328                 transport_loop_range_rect->property_y2() = canvas_height;
 329         }
 330
 331         if (transport_punch_range_rect) {
 332                 transport_punch_range_rect->property_y1() = 0.0;
 333                 transport_punch_range_rect->property_y2() = canvas_height;
 334         }
 335
 336         if (transport_punchin_line) {
 337                 transport_punchin_line->property_y1() = 0.0;
 338                 transport_punchin_line->property_y2() = canvas_height;
 339         }
 340
 341         if (transport_punchout_line) {
 342                 transport_punchout_line->property_y1() = 0.0;
 343                 transport_punchout_line->property_y2() = canvas_height;
 344         }
 345
 346         update_fixed_rulers();
 347         redisplay_tempo (true);
 348
 349         Resized (); /* EMIT_SIGNAL */
 350
 351         return false;
 352 }
 353
 354 void
 355 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 356 {
 357         TreeModel::Children rows = route_display_model->children();
 358         TreeModel::Children::iterator i;
 359         double pos;
 360
 361         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 362                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 363                 if (tv != 0 && !tv->hidden()) {
 364                         pos += tv->effective_height;
 365                 }
 366         }
 367
 368         double last_canvas_unit =  last_canvas_frame / frames_per_unit;
 369
 370         track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
 371
 372         // XXX what is the correct height value for the time canvas ? this overstates it
 373         time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
 374
 375         controls_layout.queue_resize();
 376 }
 377
 378 void
 379 Editor::controls_layout_size_request (Requisition* req)
 380 {
 381         TreeModel::Children rows = route_display_model->children();
 382         TreeModel::Children::iterator i;
 383         double pos;
 384
 385         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 386                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 387                 if (tv != 0) {
 388                         pos += tv->effective_height;
 389                 }
 390         }
 391
 392         RefPtr<Gdk::Screen> screen = get_screen();
 393
 394         if (!screen) {
 395                 screen = Gdk::Screen::get_default();
 396         }
 397
 398         /* never let the width of the controls area shrink horizontally */
 399
 400         edit_controls_vbox.check_resize();
 401
 402         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 403
 404         /* don't get too big. the fudge factors here are just guesses */
 405
 406         req->width = min (req->width, screen->get_width() - 300);
 407         req->height = min ((gint) pos, (screen->get_height() - 400));
 408
 409         /* this one is important: it determines how big the layout thinks it really is, as
 410            opposed to what it displays on the screen
 411         */
 412
 413         controls_layout.set_size (req->width, (gint) pos);
 414 }
 415
 416 bool
 417 Editor::track_canvas_map_handler (GdkEventAny* ev)
 418 {
 419         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 420         return false;
 421 }
 422
 423 bool
 424 Editor::time_canvas_map_handler (GdkEventAny* ev)
 425 {
 426         time_canvas.get_window()->set_cursor (*timebar_cursor);
 427         return false;
 428 }
 429
 430 void
 431 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 432                                          int x, int y,
 433                                          const SelectionData& data,
 434                                          guint info, guint time)
 435 {
 436         if (data.get_target() == "regions") {
 437                 drop_regions (context, x, y, data, info, time);
 438         } else {
 439                 drop_paths (context, x, y, data, info, time);
 440         }
 441 }
 442
 443 void
 444 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 445                     int x, int y,
 446                     const SelectionData& data,
 447                     guint info, guint time)
 448 {
 449         TimeAxisView* tvp;
 450         RouteTimeAxisView* tv;
 451         double cy;
 452         vector<ustring> paths;
 453         string spath;
 454         GdkEvent ev;
 455         nframes_t frame;
 456
 457         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 458                 goto out;
 459         }
 460
 461         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 462          */
 463
 464         double wx;
 465         double wy;
 466
 467         track_canvas.window_to_world (x, y, wx, wy);
 468         wx += horizontal_adjustment.get_value();
 469         wy += vertical_adjustment.get_value();
 470
 471         ev.type = GDK_BUTTON_RELEASE;
 472         ev.button.x = wx;
 473         ev.button.y = wy;
 474
 475         frame = event_frame (&ev, 0, &cy);
 476
 477         snap_to (frame);
 478
 479         if ((tvp = trackview_by_y_position (cy)) == 0) {
 480
 481                 /* drop onto canvas background: create new tracks */
 482
 483                 nframes_t pos = 0;
 484                 do_embed (paths, false, ImportAsTrack, 0, pos, false);
 485
 486         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 487
 488                 /* check that its an audio track, not a bus */
 489
 490                 if (tv->get_diskstream()) {
 491                         do_embed (paths, false, ImportToTrack, tv->audio_track().get(), frame, true);
 492                 }
 493         }
 494
 495   out:
 496         context->drag_finish (true, false, time);
 497 }
 498
 499 void
 500 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 501                       int x, int y,
 502                       const SelectionData& data,
 503                       guint info, guint time)
 504 {
 505         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 506                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 507
 508         for (uint32_t i = 0; i < sr->cnt; ++i) {
 509
 510                 boost::shared_ptr<Region> r = sr->data[i];
 511
 512                 insert_region_list_drag (r, x, y);
 513         }
 514
 515         context->drag_finish (true, false, time);
 516 }
 517
 518 void
 519 Editor::maybe_autoscroll (GdkEvent* event)
 520 {
 521         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 522         nframes_t frame = drag_info.current_pointer_frame;
 523         bool startit = false;
 524
 525         static int last_autoscroll_direction = 0;
 526
 527         if (frame > rightmost_frame) {
 528
 529                 if (rightmost_frame < max_frames) {
 530                         autoscroll_direction = 1;
 531                         startit = true;
 532                 }
 533
 534         } else if (frame < leftmost_frame) {
 535
 536                 if (leftmost_frame > 0) {
 537                         autoscroll_direction = -1;
 538                         startit = true;
 539                 }
 540
 541         } else {
 542
 543                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 544                         autoscroll_direction = -1;
 545                 } else {
 546                         autoscroll_direction = 1;
 547                 }
 548         }
 549
 550
 551         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 552                 stop_canvas_autoscroll ();
 553         }
 554
 555         if (startit && autoscroll_timeout_tag < 0) {
 556                 start_canvas_autoscroll (autoscroll_direction);
 557         }
 558
 559         last_autoscroll_direction = autoscroll_direction;
 560 }
 561
 562 gint
 563 Editor::_autoscroll_canvas (void *arg)
 564 {
 565         return ((Editor *) arg)->autoscroll_canvas ();
 566 }
 567
 568 bool
 569 Editor::autoscroll_canvas ()
 570 {
 571         nframes_t new_frame;
 572         nframes_t limit = max_frames - current_page_frames();
 573         GdkEventMotion ev;
 574         nframes_t target_frame;
 575
 576         if (autoscroll_direction < 0) {
 577                 if (leftmost_frame < autoscroll_distance) {
 578                         new_frame = 0;
 579                 } else {
 580                         new_frame = leftmost_frame - autoscroll_distance;
 581                 }
 582                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 583         } else {
 584                 if (leftmost_frame > limit - autoscroll_distance) {
 585                         new_frame = limit;
 586                 } else {
 587                         new_frame = leftmost_frame + autoscroll_distance;
 588                 }
 589                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 590         }
 591
 592         /* now fake a motion event to get the object that is being dragged to move too */
 593
 594         ev.type = GDK_MOTION_NOTIFY;
 595         ev.state &= Gdk::BUTTON1_MASK;
 596         ev.x = frame_to_unit (target_frame);
 597         ev.y = drag_info.current_pointer_y;
 598         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 599
 600         if (new_frame == 0 || new_frame == limit) {
 601                 /* we are done */
 602                 return false;
 603         }
 604
 605         autoscroll_cnt++;
 606
 607         if (autoscroll_cnt == 1) {
 608
 609                 /* connect the timeout so that we get called repeatedly */
 610
 611                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 612                 return false;
 613
 614         }
 615
 616         if (new_frame != leftmost_frame) {
 617                 reset_x_origin (new_frame);
 618         }
 619
 620         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 621
 622                 /* after about a while, speed up a bit by changing the timeout interval */
 623
 624                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 625
 626         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 627
 628                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 629
 630         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 631
 632                 /* after about another while, speed up by increasing the shift per callback */
 633
 634                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 635
 636         }
 637
 638         return true;
 639 }
 640
 641 void
 642 Editor::start_canvas_autoscroll (int dir)
 643 {
 644         if (!session || autoscroll_active) {
 645                 return;
 646         }
 647
 648         stop_canvas_autoscroll ();
 649
 650         autoscroll_active = true;
 651         autoscroll_direction = dir;
 652         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 653         autoscroll_cnt = 0;
 654
 655         /* do it right now, which will start the repeated callbacks */
 656
 657         autoscroll_canvas ();
 658 }
 659
 660 void
 661 Editor::stop_canvas_autoscroll ()
 662 {
 663         if (autoscroll_timeout_tag >= 0) {
 664                 g_source_remove (autoscroll_timeout_tag);
 665                 autoscroll_timeout_tag = -1;
 666         }
 667
 668         autoscroll_active = false;
 669 }
 670
 671 gint
 672 Editor::left_track_canvas (GdkEventCrossing *ev)
 673 {
 674         set_entered_track (0);
 675         set_entered_regionview (0);
 676         return FALSE;
 677 }
 678
 679
 680 void
 681 Editor::canvas_horizontally_scrolled ()
 682 {
 683         /* this is the core function that controls horizontal scrolling of the canvas. it is called
 684            whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
 685            idle handler, which is important because tempo_map_changed() should issue redraws immediately
 686            and not defer them to an idle handler.
 687         */
 688
 689         leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 690         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 691
 692         if (rightmost_frame > last_canvas_frame) {
 693                 last_canvas_frame = rightmost_frame;
 694                 reset_scrolling_region ();
 695         }
 696
 697         update_fixed_rulers ();
 698
 699         redisplay_tempo (!_dragging_hscrollbar);
 700 }
 701
 702 void
 703 Editor::color_handler()
 704 {
 705         edit_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_EditCursor.get();
 706         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 707         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 708
 709         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 710         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 711
 712         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 713         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 714
 715         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 716         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 717
 718         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 719         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 720
 721         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 722         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 723
 724         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 725         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 726
 727         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 728         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 729
 730         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 731
 732         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 733         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 734
 735         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 736         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 737
 738         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 739         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 740
 741         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 742         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 743
 744         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 745         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 746
 747         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 748         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 749
 750         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 751         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 752         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 753         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 754         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 755
 756         refresh_location_display ();
 757         redisplay_tempo (true);
 758
 759         if (session)
 760                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 761 }
 762