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         cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 147
 148         time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 149         tempo_lines = new TempoLines(track_canvas, time_line_group);
 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         marker_time_line_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 158         marker_tempo_lines = new TempoLines(time_canvas, marker_time_line_group);
 159
 160         meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 161         tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
 162         marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 163         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 164         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
 165
 166         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 167         tempo_bar->property_outline_what() = (0x1 | 0x8);
 168         tempo_bar->property_outline_pixels() = 1;
 169
 170         meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 171         meter_bar->property_outline_what() = (0x1 | 0x8);
 172         meter_bar->property_outline_pixels() = 1;
 173
 174         marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 175         marker_bar->property_outline_what() = (0x1 | 0x8);
 176         marker_bar->property_outline_pixels() = 1;
 177
 178         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 179         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 180         range_marker_bar->property_outline_pixels() = 1;
 181
 182         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 183         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 184         transport_marker_bar->property_outline_pixels() = 1;
 185
 186         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 187         range_bar_drag_rect->property_outline_pixels() = 0;
 188         range_bar_drag_rect->hide ();
 189
 190         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 191         transport_bar_drag_rect->property_outline_pixels() = 0;
 192         transport_bar_drag_rect->hide ();
 193
 194         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 195         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 196
 197         marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
 198         marker_drag_line->property_width_pixels() = 1;
 199         marker_drag_line->property_points() = marker_drag_line_points;
 200         marker_drag_line->hide();
 201
 202         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 203         range_marker_drag_rect->hide ();
 204
 205         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 206         transport_loop_range_rect->property_outline_pixels() = 1;
 207         transport_loop_range_rect->hide();
 208
 209         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 210         transport_punch_range_rect->property_outline_pixels() = 0;
 211         transport_punch_range_rect->hide();
 212
 213         transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
 214
 215         transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
 216         transport_punchin_line->property_x1() = 0.0;
 217         transport_punchin_line->property_y1() = 0.0;
 218         transport_punchin_line->property_x2() = 0.0;
 219         transport_punchin_line->property_y2() = 0.0;
 220         transport_punchin_line->hide ();
 221
 222         transport_punchout_line  = new ArdourCanvas::SimpleLine (*time_line_group);
 223         transport_punchout_line->property_x1() = 0.0;
 224         transport_punchout_line->property_y1() = 0.0;
 225         transport_punchout_line->property_x2() = 0.0;
 226         transport_punchout_line->property_y2() = 0.0;
 227         transport_punchout_line->hide();
 228
 229         // used to show zoom mode active zooming
 230         zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 231         zoom_rect->property_outline_pixels() = 1;
 232         zoom_rect->hide();
 233
 234         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 235
 236         // used as rubberband rect
 237         rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 238         rubberband_rect->property_outline_pixels() = 1;
 239         rubberband_rect->hide();
 240
 241         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 242         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 243         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 244         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 245         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 246
 247         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
 248         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
 249
 250         double time_height = timebar_height * 5;
 251         double time_width = FLT_MAX/frames_per_unit;
 252         time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
 253
 254         edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
 255         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 256
 257         initial_ruler_update_required = true;
 258         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 259
 260         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 261         color_handler();
 262
 263 }
 264
 265 void
 266 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 267 {
 268         canvas_allocation = alloc;
 269
 270         if (!initial_ruler_update_required) {
 271                 if (!canvas_idle_queued) {
 272                         /* call this first so that we do stuff before any pending redraw */
 273                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 274                         canvas_idle_queued = true;
 275                 }
 276                 return;
 277         }
 278
 279         initial_ruler_update_required = false;
 280
 281         track_canvas_size_allocated ();
 282 }
 283
 284 bool
 285 Editor::track_canvas_size_allocated ()
 286 {
 287         if (canvas_idle_queued) {
 288                 canvas_idle_queued = false;
 289         }
 290
 291         canvas_width = canvas_allocation.get_width();
 292         canvas_height = canvas_allocation.get_height();
 293
 294         full_canvas_height = canvas_height;
 295
 296         if (session) {
 297                 TrackViewList::iterator i;
 298                 double height = 0;
 299
 300                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 301                         if ((*i)->control_parent) {
 302                                 height += (*i)->effective_height;
 303                         }
 304                 }
 305
 306                 full_canvas_height = height;
 307         }
 308
 309         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 310         edit_cursor->set_position (edit_cursor->current_frame);
 311         playhead_cursor->set_position (playhead_cursor->current_frame);
 312
 313         reset_hscrollbar_stepping ();
 314         reset_scrolling_region ();
 315
 316         if (edit_cursor) edit_cursor->set_length (canvas_height);
 317         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 318
 319         if (marker_drag_line) {
 320                 marker_drag_line_points.back().set_y(canvas_height);
 321                 marker_drag_line->property_points() = marker_drag_line_points;
 322         }
 323
 324         if (range_marker_drag_rect) {
 325                 range_marker_drag_rect->property_y1() = 0.0;
 326                 range_marker_drag_rect->property_y2() = canvas_height;
 327         }
 328
 329         if (transport_loop_range_rect) {
 330                 transport_loop_range_rect->property_y1() = 0.0;
 331                 transport_loop_range_rect->property_y2() = canvas_height;
 332         }
 333
 334         if (transport_punch_range_rect) {
 335                 transport_punch_range_rect->property_y1() = 0.0;
 336                 transport_punch_range_rect->property_y2() = canvas_height;
 337         }
 338
 339         if (transport_punchin_line) {
 340                 transport_punchin_line->property_y1() = 0.0;
 341                 transport_punchin_line->property_y2() = canvas_height;
 342         }
 343
 344         if (transport_punchout_line) {
 345                 transport_punchout_line->property_y1() = 0.0;
 346                 transport_punchout_line->property_y2() = canvas_height;
 347         }
 348
 349         update_fixed_rulers();
 350         redisplay_tempo (true);
 351
 352         Resized (); /* EMIT_SIGNAL */
 353
 354         return false;
 355 }
 356
 357 void
 358 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 359 {
 360         TreeModel::Children rows = route_display_model->children();
 361         TreeModel::Children::iterator i;
 362         double pos;
 363
 364         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 365                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 366                 if (tv != 0 && !tv->hidden()) {
 367                         pos += tv->effective_height;
 368                 }
 369         }
 370
 371         double last_canvas_unit =  last_canvas_frame / frames_per_unit;
 372
 373         track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
 374
 375         // XXX what is the correct height value for the time canvas ? this overstates it
 376         time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
 377
 378         controls_layout.queue_resize();
 379 }
 380
 381 void
 382 Editor::controls_layout_size_request (Requisition* req)
 383 {
 384         TreeModel::Children rows = route_display_model->children();
 385         TreeModel::Children::iterator i;
 386         double pos;
 387
 388         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 389                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 390                 if (tv != 0) {
 391                         pos += tv->effective_height;
 392                 }
 393         }
 394
 395         RefPtr<Gdk::Screen> screen = get_screen();
 396
 397         if (!screen) {
 398                 screen = Gdk::Screen::get_default();
 399         }
 400
 401         /* never let the width of the controls area shrink horizontally */
 402
 403         edit_controls_vbox.check_resize();
 404
 405         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 406
 407         /* don't get too big. the fudge factors here are just guesses */
 408
 409         req->width = min (req->width, screen->get_width() - 300);
 410         req->height = min ((gint) pos, (screen->get_height() - 400));
 411
 412         /* this one is important: it determines how big the layout thinks it really is, as
 413            opposed to what it displays on the screen
 414         */
 415
 416         controls_layout.set_size (req->width, (gint) pos);
 417 }
 418
 419 bool
 420 Editor::track_canvas_map_handler (GdkEventAny* ev)
 421 {
 422         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 423         return false;
 424 }
 425
 426 bool
 427 Editor::time_canvas_map_handler (GdkEventAny* ev)
 428 {
 429         time_canvas.get_window()->set_cursor (*timebar_cursor);
 430         return false;
 431 }
 432
 433 void
 434 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 435                                          int x, int y,
 436                                          const SelectionData& data,
 437                                          guint info, guint time)
 438 {
 439         if (data.get_target() == "regions") {
 440                 drop_regions (context, x, y, data, info, time);
 441         } else {
 442                 drop_paths (context, x, y, data, info, time);
 443         }
 444 }
 445
 446 void
 447 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 448                     int x, int y,
 449                     const SelectionData& data,
 450                     guint info, guint time)
 451 {
 452         TimeAxisView* tvp;
 453         RouteTimeAxisView* tv;
 454         double cy;
 455         vector<ustring> paths;
 456         string spath;
 457         GdkEvent ev;
 458         nframes_t frame;
 459
 460         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 461                 goto out;
 462         }
 463
 464         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 465          */
 466
 467         double wx;
 468         double wy;
 469
 470         track_canvas.window_to_world (x, y, wx, wy);
 471         wx += horizontal_adjustment.get_value();
 472         wy += vertical_adjustment.get_value();
 473
 474         ev.type = GDK_BUTTON_RELEASE;
 475         ev.button.x = wx;
 476         ev.button.y = wy;
 477
 478         frame = event_frame (&ev, 0, &cy);
 479
 480         snap_to (frame);
 481
 482         if ((tvp = trackview_by_y_position (cy)) == 0) {
 483
 484                 /* drop onto canvas background: create new tracks */
 485
 486                 nframes_t pos = 0;
 487                 do_embed (paths, false, ImportAsTrack, 0, pos, false);
 488
 489         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 490
 491                 /* check that its an audio track, not a bus */
 492
 493                 if (tv->get_diskstream()) {
 494                         do_embed (paths, false, ImportToTrack, tv->audio_track().get(), frame, true);
 495                 }
 496         }
 497
 498   out:
 499         context->drag_finish (true, false, time);
 500 }
 501
 502 void
 503 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 504                       int x, int y,
 505                       const SelectionData& data,
 506                       guint info, guint time)
 507 {
 508         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 509                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 510
 511         for (uint32_t i = 0; i < sr->cnt; ++i) {
 512
 513                 boost::shared_ptr<Region> r = sr->data[i];
 514
 515                 insert_region_list_drag (r, x, y);
 516         }
 517
 518         context->drag_finish (true, false, time);
 519 }
 520
 521 void
 522 Editor::maybe_autoscroll (GdkEvent* event)
 523 {
 524         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 525         nframes_t frame = drag_info.current_pointer_frame;
 526         bool startit = false;
 527
 528         static int last_autoscroll_direction = 0;
 529
 530         if (frame > rightmost_frame) {
 531
 532                 if (rightmost_frame < max_frames) {
 533                         autoscroll_direction = 1;
 534                         startit = true;
 535                 }
 536
 537         } else if (frame < leftmost_frame) {
 538
 539                 if (leftmost_frame > 0) {
 540                         autoscroll_direction = -1;
 541                         startit = true;
 542                 }
 543
 544         } else {
 545
 546                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 547                         autoscroll_direction = -1;
 548                 } else {
 549                         autoscroll_direction = 1;
 550                 }
 551         }
 552
 553
 554         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 555                 stop_canvas_autoscroll ();
 556         }
 557
 558         if (startit && autoscroll_timeout_tag < 0) {
 559                 start_canvas_autoscroll (autoscroll_direction);
 560         }
 561
 562         last_autoscroll_direction = autoscroll_direction;
 563 }
 564
 565 gint
 566 Editor::_autoscroll_canvas (void *arg)
 567 {
 568         return ((Editor *) arg)->autoscroll_canvas ();
 569 }
 570
 571 bool
 572 Editor::autoscroll_canvas ()
 573 {
 574         nframes_t new_frame;
 575         nframes_t limit = max_frames - current_page_frames();
 576         GdkEventMotion ev;
 577         nframes_t target_frame;
 578
 579         if (autoscroll_direction < 0) {
 580                 if (leftmost_frame < autoscroll_distance) {
 581                         new_frame = 0;
 582                 } else {
 583                         new_frame = leftmost_frame - autoscroll_distance;
 584                 }
 585                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 586         } else {
 587                 if (leftmost_frame > limit - autoscroll_distance) {
 588                         new_frame = limit;
 589                 } else {
 590                         new_frame = leftmost_frame + autoscroll_distance;
 591                 }
 592                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 593         }
 594
 595         /* now fake a motion event to get the object that is being dragged to move too */
 596
 597         ev.type = GDK_MOTION_NOTIFY;
 598         ev.state &= Gdk::BUTTON1_MASK;
 599         ev.x = frame_to_unit (target_frame);
 600         ev.y = drag_info.current_pointer_y;
 601         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 602
 603         if (new_frame == 0 || new_frame == limit) {
 604                 /* we are done */
 605                 return false;
 606         }
 607
 608         autoscroll_cnt++;
 609
 610         if (autoscroll_cnt == 1) {
 611
 612                 /* connect the timeout so that we get called repeatedly */
 613
 614                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 615                 return false;
 616
 617         }
 618
 619         if (new_frame != leftmost_frame) {
 620                 reset_x_origin (new_frame);
 621         }
 622
 623         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 624
 625                 /* after about a while, speed up a bit by changing the timeout interval */
 626
 627                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 628
 629         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 630
 631                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 632
 633         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 634
 635                 /* after about another while, speed up by increasing the shift per callback */
 636
 637                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 638
 639         }
 640
 641         return true;
 642 }
 643
 644 void
 645 Editor::start_canvas_autoscroll (int dir)
 646 {
 647         if (!session || autoscroll_active) {
 648                 return;
 649         }
 650
 651         stop_canvas_autoscroll ();
 652
 653         autoscroll_active = true;
 654         autoscroll_direction = dir;
 655         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 656         autoscroll_cnt = 0;
 657
 658         /* do it right now, which will start the repeated callbacks */
 659
 660         autoscroll_canvas ();
 661 }
 662
 663 void
 664 Editor::stop_canvas_autoscroll ()
 665 {
 666         if (autoscroll_timeout_tag >= 0) {
 667                 g_source_remove (autoscroll_timeout_tag);
 668                 autoscroll_timeout_tag = -1;
 669         }
 670
 671         autoscroll_active = false;
 672 }
 673
 674 gint
 675 Editor::left_track_canvas (GdkEventCrossing *ev)
 676 {
 677         set_entered_track (0);
 678         set_entered_regionview (0);
 679         return FALSE;
 680 }
 681
 682
 683 void
 684 Editor::canvas_horizontally_scrolled ()
 685 {
 686         /* this is the core function that controls horizontal scrolling of the canvas. it is called
 687            whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
 688            idle handler, which is important because tempo_map_changed() should issue redraws immediately
 689            and not defer them to an idle handler.
 690         */
 691
 692         leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 693         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 694
 695         if (rightmost_frame > last_canvas_frame) {
 696                 last_canvas_frame = rightmost_frame;
 697                 reset_scrolling_region ();
 698         }
 699
 700         update_fixed_rulers ();
 701
 702         redisplay_tempo (!_dragging_hscrollbar);
 703 }
 704
 705 void
 706 Editor::color_handler()
 707 {
 708         edit_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_EditCursor.get();
 709         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 710         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 711
 712         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 713         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 714
 715         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 716         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 717
 718         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 719         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 720
 721         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 722         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 723
 724         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 725         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 726
 727         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 728         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 729
 730         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 731         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 732
 733         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 734
 735         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 736         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 737
 738         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 739         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 740
 741         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 742         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 743
 744         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 745         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 746
 747         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 748         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 749
 750         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 751         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 752
 753         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 754         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 755         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 756         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 757         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 758
 759         refresh_location_display ();
 760         redisplay_tempo (true);
 761
 762         if (session)
 763                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 764 }
 765