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 #include <ardour/profile.h>
  26
  27 #include "ardour_ui.h"
  28 #include "editor.h"
  29 #include "waveview.h"
  30 #include "simplerect.h"
  31 #include "simpleline.h"
  32 #include "waveview_p.h"
  33 #include "simplerect_p.h"
  34 #include "simpleline_p.h"
  35 #include "canvas_impl.h"
  36 #include "editing.h"
  37 #include "rgb_macros.h"
  38 #include "utils.h"
  39 #include "time_axis_view.h"
  40 #include "audio_time_axis.h"
  41
  42 #ifdef WITH_CMT
  43 #include "imageframe.h"
  44 #include "imageframe_p.h"
  45 #endif
  46
  47 #include "i18n.h"
  48
  49 using namespace std;
  50 using namespace sigc;
  51 using namespace ARDOUR;
  52 using namespace PBD;
  53 using namespace Gtk;
  54 using namespace Glib;
  55 using namespace Gtkmm2ext;
  56 using namespace Editing;
  57
  58 /* XXX this is a hack. it ought to be the maximum value of an nframes_t */
  59
  60 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
  61
  62 extern "C"
  63 {
  64
  65 GType gnome_canvas_simpleline_get_type(void);
  66 GType gnome_canvas_simplerect_get_type(void);
  67 GType gnome_canvas_waveview_get_type(void);
  68
  69 #ifdef WITH_CMT
  70 GType gnome_canvas_imageframe_get_type(void);
  71 #endif
  72
  73 }
  74
  75 static void ardour_canvas_type_init()
  76 {
  77         // Map gtypes to gtkmm wrapper-creation functions:
  78
  79         Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
  80         Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
  81         Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
  82
  83 #ifdef WITH_CMT
  84         Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
  85 #endif
  86
  87         // Register the gtkmm gtypes:
  88
  89         (void) Gnome::Canvas::WaveView::get_type();
  90         (void) Gnome::Canvas::SimpleLine::get_type();
  91         (void) Gnome::Canvas::SimpleRect::get_type();
  92
  93 #ifdef WITH_CMT
  94         (void) Gnome::Canvas::ImageFrame::get_type();
  95 #endif
  96 }
  97
  98 void
  99 Editor::initialize_canvas ()
 100 {
 101         ArdourCanvas::init ();
 102         ardour_canvas_type_init ();
 103
 104         /* don't try to center the canvas */
 105
 106         track_canvas.set_center_scroll_region (false);
 107         track_canvas.set_dither         (Gdk::RGB_DITHER_NONE);
 108
 109         /* need to handle 4 specific types of events as catch-alls */
 110
 111         track_canvas.signal_scroll_event().connect (mem_fun (*this, &Editor::track_canvas_scroll_event));
 112         track_canvas.signal_motion_notify_event().connect (mem_fun (*this, &Editor::track_canvas_motion_notify_event));
 113         track_canvas.signal_button_press_event().connect (mem_fun (*this, &Editor::track_canvas_button_press_event));
 114         track_canvas.signal_button_release_event().connect (mem_fun (*this, &Editor::track_canvas_button_release_event));
 115
 116         track_canvas.set_name ("EditorMainCanvas");
 117         track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
 118         track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
 119         track_canvas.set_flags (CAN_FOCUS);
 120
 121         /* set up drag-n-drop */
 122
 123         vector<TargetEntry> target_table;
 124
 125         // Drag-N-Drop from the region list can generate this target
 126         target_table.push_back (TargetEntry ("regions"));
 127
 128         target_table.push_back (TargetEntry ("text/plain"));
 129         target_table.push_back (TargetEntry ("text/uri-list"));
 130         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 131
 132         track_canvas.drag_dest_set (target_table);
 133         track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
 134
 135         /* stuff for the verbose canvas cursor */
 136
 137         Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
 138
 139         verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
 140         verbose_canvas_cursor->property_font_desc() = *font;
 141         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 142
 143         delete font;
 144
 145         verbose_cursor_visible = false;
 146
 147         if (Profile->get_sae()) {
 148                 Image img (::get_icon (X_("saelogo")));
 149                 logo_item = new ArdourCanvas::Pixbuf (*track_canvas.root(), 0.0, 0.0, img.get_pixbuf());
 150                 // logo_item->property_height_in_pixels() = true;
 151                 // logo_item->property_width_in_pixels() = true;
 152                 // logo_item->property_height_set() = true;
 153                 // logo_item->property_width_set() = true;
 154                 logo_item->show ();
 155         }
 156
 157         /* a group to hold time (measure) lines */
 158
 159         time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 160         tempo_lines = new TempoLines(track_canvas, time_line_group);
 161         cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 162         time_canvas.set_name ("EditorTimeCanvas");
 163         time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
 164         time_canvas.set_flags (CAN_FOCUS);
 165         time_canvas.set_center_scroll_region (false);
 166         time_canvas.set_dither          (Gdk::RGB_DITHER_NONE);
 167
 168         marker_time_line_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 169         marker_tempo_lines = new TempoLines(time_canvas, marker_time_line_group);
 170
 171         meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 172         tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
 173         marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 174         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 175         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
 176
 177         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 178         tempo_bar->property_outline_what() = (0x1 | 0x8);
 179         tempo_bar->property_outline_pixels() = 1;
 180
 181         meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 182         meter_bar->property_outline_what() = (0x1 | 0x8);
 183         meter_bar->property_outline_pixels() = 1;
 184
 185         marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 186         marker_bar->property_outline_what() = (0x1 | 0x8);
 187         marker_bar->property_outline_pixels() = 1;
 188
 189         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 190         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 191         range_marker_bar->property_outline_pixels() = 1;
 192
 193         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 194         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 195         transport_marker_bar->property_outline_pixels() = 1;
 196
 197         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 198         range_bar_drag_rect->property_outline_pixels() = 0;
 199         range_bar_drag_rect->hide ();
 200
 201         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 202         transport_bar_drag_rect->property_outline_pixels() = 0;
 203         transport_bar_drag_rect->hide ();
 204
 205         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 206         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 207
 208         marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
 209         marker_drag_line->property_width_pixels() = 1;
 210         marker_drag_line->property_points() = marker_drag_line_points;
 211         marker_drag_line->hide();
 212
 213         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 214         range_marker_drag_rect->hide ();
 215
 216         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 217         transport_loop_range_rect->property_outline_pixels() = 1;
 218         transport_loop_range_rect->hide();
 219
 220         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 221         transport_punch_range_rect->property_outline_pixels() = 0;
 222         transport_punch_range_rect->hide();
 223
 224         transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
 225
 226         transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
 227         transport_punchin_line->property_x1() = 0.0;
 228         transport_punchin_line->property_y1() = 0.0;
 229         transport_punchin_line->property_x2() = 0.0;
 230         transport_punchin_line->property_y2() = 0.0;
 231         transport_punchin_line->hide ();
 232
 233         transport_punchout_line  = new ArdourCanvas::SimpleLine (*time_line_group);
 234         transport_punchout_line->property_x1() = 0.0;
 235         transport_punchout_line->property_y1() = 0.0;
 236         transport_punchout_line->property_x2() = 0.0;
 237         transport_punchout_line->property_y2() = 0.0;
 238         transport_punchout_line->hide();
 239
 240         // used to show zoom mode active zooming
 241         zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 242         zoom_rect->property_outline_pixels() = 1;
 243         zoom_rect->hide();
 244
 245         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 246
 247         // used as rubberband rect
 248         rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 249         rubberband_rect->property_outline_pixels() = 1;
 250         rubberband_rect->hide();
 251
 252         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 253         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 254         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 255         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 256         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 257
 258         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
 259         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
 260
 261         double time_height = timebar_height * 5;
 262         double time_width = FLT_MAX/frames_per_unit;
 263         time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
 264
 265         edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
 266         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 267
 268         initial_ruler_update_required = true;
 269         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 270
 271         if (logo_item) {
 272                 logo_item->lower_to_bottom ();
 273         }
 274
 275         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 276         color_handler();
 277
 278 }
 279
 280 void
 281 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 282 {
 283         canvas_allocation = alloc;
 284
 285         if (!initial_ruler_update_required) {
 286                 if (!canvas_idle_queued) {
 287                         /* call this first so that we do stuff before any pending redraw */
 288                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 289                         canvas_idle_queued = true;
 290                 }
 291                 return;
 292         }
 293
 294         initial_ruler_update_required = false;
 295
 296         track_canvas_size_allocated ();
 297 }
 298
 299 bool
 300 Editor::track_canvas_size_allocated ()
 301 {
 302         if (canvas_idle_queued) {
 303                 canvas_idle_queued = false;
 304         }
 305
 306         canvas_width = canvas_allocation.get_width();
 307         canvas_height = canvas_allocation.get_height();
 308
 309         full_canvas_height = canvas_height;
 310
 311         if (session) {
 312                 TrackViewList::iterator i;
 313                 double height = 0;
 314
 315                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 316                         if ((*i)->control_parent) {
 317                                 height += (*i)->effective_height;
 318                         }
 319                 }
 320
 321                 full_canvas_height = height;
 322         }
 323
 324         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 325         edit_cursor->set_position (edit_cursor->current_frame);
 326         playhead_cursor->set_position (playhead_cursor->current_frame);
 327
 328         reset_hscrollbar_stepping ();
 329         reset_scrolling_region ();
 330
 331         if (edit_cursor) edit_cursor->set_length (canvas_height);
 332         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 333
 334         if (marker_drag_line) {
 335                 marker_drag_line_points.back().set_y(canvas_height);
 336                 marker_drag_line->property_points() = marker_drag_line_points;
 337         }
 338
 339         if (range_marker_drag_rect) {
 340                 range_marker_drag_rect->property_y1() = 0.0;
 341                 range_marker_drag_rect->property_y2() = canvas_height;
 342         }
 343
 344         if (transport_loop_range_rect) {
 345                 transport_loop_range_rect->property_y1() = 0.0;
 346                 transport_loop_range_rect->property_y2() = canvas_height;
 347         }
 348
 349         if (transport_punch_range_rect) {
 350                 transport_punch_range_rect->property_y1() = 0.0;
 351                 transport_punch_range_rect->property_y2() = canvas_height;
 352         }
 353
 354         if (transport_punchin_line) {
 355                 transport_punchin_line->property_y1() = 0.0;
 356                 transport_punchin_line->property_y2() = canvas_height;
 357         }
 358
 359         if (transport_punchout_line) {
 360                 transport_punchout_line->property_y1() = 0.0;
 361                 transport_punchout_line->property_y2() = canvas_height;
 362         }
 363
 364         update_fixed_rulers();
 365         redisplay_tempo (true);
 366
 367         if (logo_item) {
 368                 // logo_item->property_height() = canvas_height;
 369                 // logo_item->property_width() = canvas_width;
 370         }
 371
 372         Resized (); /* EMIT_SIGNAL */
 373
 374         return false;
 375 }
 376
 377 void
 378 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 379 {
 380         TreeModel::Children rows = route_display_model->children();
 381         TreeModel::Children::iterator i;
 382         double pos;
 383
 384         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 385                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 386                 if (tv != 0 && !tv->hidden()) {
 387                         pos += tv->effective_height;
 388                 }
 389         }
 390
 391         double last_canvas_unit =  last_canvas_frame / frames_per_unit;
 392
 393         track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
 394
 395         // XXX what is the correct height value for the time canvas ? this overstates it
 396         time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
 397
 398         controls_layout.queue_resize();
 399 }
 400
 401 void
 402 Editor::controls_layout_size_request (Requisition* req)
 403 {
 404         TreeModel::Children rows = route_display_model->children();
 405         TreeModel::Children::iterator i;
 406         double pos;
 407
 408         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 409                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 410                 if (tv != 0) {
 411                         pos += tv->effective_height;
 412                 }
 413         }
 414
 415         RefPtr<Gdk::Screen> screen = get_screen();
 416
 417         if (!screen) {
 418                 screen = Gdk::Screen::get_default();
 419         }
 420
 421         /* never let the width of the controls area shrink horizontally */
 422
 423         edit_controls_vbox.check_resize();
 424
 425         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 426
 427         /* don't get too big. the fudge factors here are just guesses */
 428
 429         req->width = min (req->width, screen->get_width() - 300);
 430         req->height = min ((gint) pos, (screen->get_height() - 400));
 431
 432         /* this one is important: it determines how big the layout thinks it really is, as
 433            opposed to what it displays on the screen
 434         */
 435
 436         controls_layout.set_size (req->width, (gint) pos);
 437 }
 438
 439 bool
 440 Editor::track_canvas_map_handler (GdkEventAny* ev)
 441 {
 442         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 443         return false;
 444 }
 445
 446 bool
 447 Editor::time_canvas_map_handler (GdkEventAny* ev)
 448 {
 449         time_canvas.get_window()->set_cursor (*timebar_cursor);
 450         return false;
 451 }
 452
 453 void
 454 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 455                                          int x, int y,
 456                                          const SelectionData& data,
 457                                          guint info, guint time)
 458 {
 459         if (data.get_target() == "regions") {
 460                 drop_regions (context, x, y, data, info, time);
 461         } else {
 462                 drop_paths (context, x, y, data, info, time);
 463         }
 464 }
 465
 466 void
 467 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 468                     int x, int y,
 469                     const SelectionData& data,
 470                     guint info, guint time)
 471 {
 472         TimeAxisView* tvp;
 473         RouteTimeAxisView* tv;
 474         double cy;
 475         vector<ustring> paths;
 476         string spath;
 477         GdkEvent ev;
 478         nframes64_t frame;
 479
 480         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 481                 goto out;
 482         }
 483
 484         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 485          */
 486
 487         double wx;
 488         double wy;
 489
 490         track_canvas.window_to_world (x, y, wx, wy);
 491         wx += horizontal_adjustment.get_value();
 492         wy += vertical_adjustment.get_value();
 493
 494         ev.type = GDK_BUTTON_RELEASE;
 495         ev.button.x = wx;
 496         ev.button.y = wy;
 497
 498         frame = event_frame (&ev, 0, &cy);
 499
 500         snap_to (frame);
 501
 502         if ((tvp = trackview_by_y_position (cy)) == 0) {
 503
 504                 /* drop onto canvas background: create new tracks */
 505
 506                 do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 507
 508         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 509
 510                 /* check that its an audio track, not a bus */
 511
 512                 /* check that its an audio track, not a bus */
 513
 514                 if (tv->get_diskstream()) {
 515                         /* select the track, then embed */
 516                         selection->set (tv);
 517                         do_embed (paths, Editing::ImportDistinctFiles, ImportToTrack, frame);
 518                 }
 519         }
 520
 521   out:
 522         context->drag_finish (true, false, time);
 523 }
 524
 525 void
 526 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 527                       int x, int y,
 528                       const SelectionData& data,
 529                       guint info, guint time)
 530 {
 531         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 532                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 533
 534         for (uint32_t i = 0; i < sr->cnt; ++i) {
 535
 536                 boost::shared_ptr<Region> r = sr->data[i];
 537
 538                 insert_region_list_drag (r, x, y);
 539         }
 540
 541         context->drag_finish (true, false, time);
 542 }
 543
 544 void
 545 Editor::maybe_autoscroll (GdkEvent* event)
 546 {
 547         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 548         nframes_t frame = drag_info.current_pointer_frame;
 549         bool startit = false;
 550
 551         static int last_autoscroll_direction = 0;
 552
 553         if (frame > rightmost_frame) {
 554
 555                 if (rightmost_frame < max_frames) {
 556                         autoscroll_direction = 1;
 557                         startit = true;
 558                 }
 559
 560         } else if (frame < leftmost_frame) {
 561
 562                 if (leftmost_frame > 0) {
 563                         autoscroll_direction = -1;
 564                         startit = true;
 565                 }
 566
 567         } else {
 568
 569                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 570                         autoscroll_direction = -1;
 571                 } else {
 572                         autoscroll_direction = 1;
 573                 }
 574         }
 575
 576
 577         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 578                 stop_canvas_autoscroll ();
 579         }
 580
 581         if (startit && autoscroll_timeout_tag < 0) {
 582                 start_canvas_autoscroll (autoscroll_direction);
 583         }
 584
 585         last_autoscroll_direction = autoscroll_direction;
 586 }
 587
 588 gint
 589 Editor::_autoscroll_canvas (void *arg)
 590 {
 591         return ((Editor *) arg)->autoscroll_canvas ();
 592 }
 593
 594 bool
 595 Editor::autoscroll_canvas ()
 596 {
 597         nframes_t new_frame;
 598         nframes_t limit = max_frames - current_page_frames();
 599         GdkEventMotion ev;
 600         nframes_t target_frame;
 601
 602         if (autoscroll_direction < 0) {
 603                 if (leftmost_frame < autoscroll_distance) {
 604                         new_frame = 0;
 605                 } else {
 606                         new_frame = leftmost_frame - autoscroll_distance;
 607                 }
 608                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 609         } else {
 610                 if (leftmost_frame > limit - autoscroll_distance) {
 611                         new_frame = limit;
 612                 } else {
 613                         new_frame = leftmost_frame + autoscroll_distance;
 614                 }
 615                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 616         }
 617
 618         /* now fake a motion event to get the object that is being dragged to move too */
 619
 620         ev.type = GDK_MOTION_NOTIFY;
 621         ev.state &= Gdk::BUTTON1_MASK;
 622         ev.x = frame_to_unit (target_frame);
 623         ev.y = drag_info.current_pointer_y;
 624         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 625
 626         if (new_frame == 0 || new_frame == limit) {
 627                 /* we are done */
 628                 return false;
 629         }
 630
 631         autoscroll_cnt++;
 632
 633         if (autoscroll_cnt == 1) {
 634
 635                 /* connect the timeout so that we get called repeatedly */
 636
 637                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 638                 return false;
 639
 640         }
 641
 642         if (new_frame != leftmost_frame) {
 643                 reset_x_origin (new_frame);
 644         }
 645
 646         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 647
 648                 /* after about a while, speed up a bit by changing the timeout interval */
 649
 650                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 651
 652         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 653
 654                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 655
 656         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 657
 658                 /* after about another while, speed up by increasing the shift per callback */
 659
 660                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 661
 662         }
 663
 664         return true;
 665 }
 666
 667 void
 668 Editor::start_canvas_autoscroll (int dir)
 669 {
 670         if (!session || autoscroll_active) {
 671                 return;
 672         }
 673
 674         stop_canvas_autoscroll ();
 675
 676         autoscroll_active = true;
 677         autoscroll_direction = dir;
 678         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 679         autoscroll_cnt = 0;
 680
 681         /* do it right now, which will start the repeated callbacks */
 682
 683         autoscroll_canvas ();
 684 }
 685
 686 void
 687 Editor::stop_canvas_autoscroll ()
 688 {
 689         if (autoscroll_timeout_tag >= 0) {
 690                 g_source_remove (autoscroll_timeout_tag);
 691                 autoscroll_timeout_tag = -1;
 692         }
 693
 694         autoscroll_active = false;
 695 }
 696
 697 gint
 698 Editor::left_track_canvas (GdkEventCrossing *ev)
 699 {
 700         set_entered_track (0);
 701         set_entered_regionview (0);
 702         return FALSE;
 703 }
 704
 705
 706 void
 707 Editor::canvas_horizontally_scrolled ()
 708 {
 709         /* this is the core function that controls horizontal scrolling of the canvas. it is called
 710            whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
 711            idle handler, which is important because tempo_map_changed() should issue redraws immediately
 712            and not defer them to an idle handler.
 713         */
 714
 715         leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 716         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 717
 718         if (rightmost_frame > last_canvas_frame) {
 719                 last_canvas_frame = rightmost_frame;
 720                 reset_scrolling_region ();
 721         }
 722
 723         if (logo_item) {
 724                 logo_item->property_x() = horizontal_adjustment.get_value ();
 725         }
 726
 727         update_fixed_rulers ();
 728
 729         redisplay_tempo (!_dragging_hscrollbar);
 730 }
 731
 732 void
 733 Editor::color_handler()
 734 {
 735         edit_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_EditCursor.get();
 736         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 737         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 738
 739         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 740         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 741
 742         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 743         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 744
 745         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 746         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 747
 748         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 749         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 750
 751         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 752         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 753
 754         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 755         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 756
 757         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 758         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 759
 760         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 761
 762         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 763         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 764
 765         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 766         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 767
 768         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 769         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 770
 771         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 772         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 773
 774         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 775         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 776
 777         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 778         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 779
 780         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 781         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 782         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 783         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 784         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 785
 786         refresh_location_display ();
 787         redisplay_tempo (true);
 788
 789         if (session)
 790                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 791 }
 792