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         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 174         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 175         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         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 266
 267         initial_ruler_update_required = true;
 268         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 269
 270         if (logo_item) {
 271                 logo_item->lower_to_bottom ();
 272         }
 273
 274         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 275         color_handler();
 276
 277 }
 278
 279 void
 280 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 281 {
 282         canvas_allocation = alloc;
 283
 284         if (!initial_ruler_update_required) {
 285                 if (!canvas_idle_queued) {
 286                         /* call this first so that we do stuff before any pending redraw */
 287                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 288                         canvas_idle_queued = true;
 289                 }
 290                 return;
 291         }
 292
 293         initial_ruler_update_required = false;
 294
 295         track_canvas_size_allocated ();
 296 }
 297
 298 bool
 299 Editor::track_canvas_size_allocated ()
 300 {
 301         if (canvas_idle_queued) {
 302                 canvas_idle_queued = false;
 303         }
 304
 305         canvas_width = canvas_allocation.get_width();
 306         canvas_height = canvas_allocation.get_height();
 307
 308         full_canvas_height = canvas_height;
 309
 310         if (session) {
 311                 TrackViewList::iterator i;
 312                 double height = 0;
 313
 314                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 315                         if ((*i)->control_parent) {
 316                                 height += (*i)->effective_height;
 317                         }
 318                 }
 319
 320                 full_canvas_height = height;
 321         }
 322
 323         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 324         playhead_cursor->set_position (playhead_cursor->current_frame);
 325
 326         reset_hscrollbar_stepping ();
 327         reset_scrolling_region ();
 328
 329         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 330
 331         // EDIT CURSOR XXX set line height for selected markers here
 332
 333         if (range_marker_drag_rect) {
 334                 range_marker_drag_rect->property_y1() = 0.0;
 335                 range_marker_drag_rect->property_y2() = canvas_height;
 336         }
 337
 338         if (transport_loop_range_rect) {
 339                 transport_loop_range_rect->property_y1() = 0.0;
 340                 transport_loop_range_rect->property_y2() = canvas_height;
 341         }
 342
 343         if (transport_punch_range_rect) {
 344                 transport_punch_range_rect->property_y1() = 0.0;
 345                 transport_punch_range_rect->property_y2() = canvas_height;
 346         }
 347
 348         if (transport_punchin_line) {
 349                 transport_punchin_line->property_y1() = 0.0;
 350                 transport_punchin_line->property_y2() = canvas_height;
 351         }
 352
 353         if (transport_punchout_line) {
 354                 transport_punchout_line->property_y1() = 0.0;
 355                 transport_punchout_line->property_y2() = canvas_height;
 356         }
 357         compute_fixed_ruler_scale ();
 358         update_fixed_rulers();
 359         redisplay_tempo (true);
 360
 361         if (logo_item) {
 362                 // logo_item->property_height() = canvas_height;
 363                 // logo_item->property_width() = canvas_width;
 364         }
 365
 366         Resized (); /* EMIT_SIGNAL */
 367
 368         return false;
 369 }
 370
 371 void
 372 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 373 {
 374         TreeModel::Children rows = route_display_model->children();
 375         TreeModel::Children::iterator i;
 376         double pos;
 377
 378         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 379                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 380                 if (tv != 0 && !tv->hidden()) {
 381                         pos += tv->effective_height;
 382                 }
 383         }
 384
 385         double last_canvas_unit =  last_canvas_frame / frames_per_unit;
 386
 387         track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
 388
 389         // XXX what is the correct height value for the time canvas ? this overstates it
 390         time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
 391
 392         controls_layout.queue_resize();
 393 }
 394
 395 void
 396 Editor::controls_layout_size_request (Requisition* req)
 397 {
 398         TreeModel::Children rows = route_display_model->children();
 399         TreeModel::Children::iterator i;
 400         double pos;
 401
 402         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 403                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 404                 if (tv != 0) {
 405                         pos += tv->effective_height;
 406                 }
 407         }
 408
 409         RefPtr<Gdk::Screen> screen = get_screen();
 410
 411         if (!screen) {
 412                 screen = Gdk::Screen::get_default();
 413         }
 414
 415         /* never let the width of the controls area shrink horizontally */
 416
 417         edit_controls_vbox.check_resize();
 418
 419         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 420
 421         /* don't get too big. the fudge factors here are just guesses */
 422
 423         req->width = min (req->width, screen->get_width() - 300);
 424         req->height = min ((gint) pos, (screen->get_height() - 400));
 425
 426         /* this one is important: it determines how big the layout thinks it really is, as
 427            opposed to what it displays on the screen
 428         */
 429
 430         controls_layout.set_size (req->width, (gint) pos);
 431 }
 432
 433 bool
 434 Editor::track_canvas_map_handler (GdkEventAny* ev)
 435 {
 436         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 437         return false;
 438 }
 439
 440 bool
 441 Editor::time_canvas_map_handler (GdkEventAny* ev)
 442 {
 443         time_canvas.get_window()->set_cursor (*timebar_cursor);
 444         return false;
 445 }
 446
 447 void
 448 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 449                                          int x, int y,
 450                                          const SelectionData& data,
 451                                          guint info, guint time)
 452 {
 453         if (data.get_target() == "regions") {
 454                 drop_regions (context, x, y, data, info, time);
 455         } else {
 456                 drop_paths (context, x, y, data, info, time);
 457         }
 458 }
 459
 460 void
 461 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 462                     int x, int y,
 463                     const SelectionData& data,
 464                     guint info, guint time)
 465 {
 466         TimeAxisView* tvp;
 467         RouteTimeAxisView* tv;
 468         double cy;
 469         vector<ustring> paths;
 470         string spath;
 471         GdkEvent ev;
 472         nframes64_t frame;
 473
 474         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 475                 goto out;
 476         }
 477
 478         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 479          */
 480
 481         double wx;
 482         double wy;
 483
 484         track_canvas.window_to_world (x, y, wx, wy);
 485         wx += horizontal_adjustment.get_value();
 486         wy += vertical_adjustment.get_value();
 487
 488         ev.type = GDK_BUTTON_RELEASE;
 489         ev.button.x = wx;
 490         ev.button.y = wy;
 491
 492         frame = event_frame (&ev, 0, &cy);
 493
 494         snap_to (frame);
 495
 496         if ((tvp = trackview_by_y_position (cy)) == 0) {
 497
 498                 /* drop onto canvas background: create new tracks */
 499
 500                 do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 501
 502         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 503
 504                 /* check that its an audio track, not a bus */
 505
 506                 /* check that its an audio track, not a bus */
 507
 508                 if (tv->get_diskstream()) {
 509                         /* select the track, then embed */
 510                         selection->set (tv);
 511                         do_embed (paths, Editing::ImportDistinctFiles, ImportToTrack, frame);
 512                 }
 513         }
 514
 515   out:
 516         context->drag_finish (true, false, time);
 517 }
 518
 519 void
 520 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 521                       int x, int y,
 522                       const SelectionData& data,
 523                       guint info, guint time)
 524 {
 525         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 526                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 527
 528         for (uint32_t i = 0; i < sr->cnt; ++i) {
 529
 530                 boost::shared_ptr<Region> r = sr->data[i];
 531
 532                 insert_region_list_drag (r, x, y);
 533         }
 534
 535         context->drag_finish (true, false, time);
 536 }
 537
 538 void
 539 Editor::maybe_autoscroll (GdkEvent* event)
 540 {
 541         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 542         nframes_t frame = drag_info.current_pointer_frame;
 543         bool startit = false;
 544
 545         static int last_autoscroll_direction = 0;
 546
 547         if (frame > rightmost_frame) {
 548
 549                 if (rightmost_frame < max_frames) {
 550                         autoscroll_direction = 1;
 551                         startit = true;
 552                 }
 553
 554         } else if (frame < leftmost_frame) {
 555
 556                 if (leftmost_frame > 0) {
 557                         autoscroll_direction = -1;
 558                         startit = true;
 559                 }
 560
 561         } else {
 562
 563                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 564                         autoscroll_direction = -1;
 565                 } else {
 566                         autoscroll_direction = 1;
 567                 }
 568         }
 569
 570
 571         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 572                 stop_canvas_autoscroll ();
 573         }
 574
 575         if (startit && autoscroll_timeout_tag < 0) {
 576                 start_canvas_autoscroll (autoscroll_direction);
 577         }
 578
 579         last_autoscroll_direction = autoscroll_direction;
 580 }
 581
 582 gint
 583 Editor::_autoscroll_canvas (void *arg)
 584 {
 585         return ((Editor *) arg)->autoscroll_canvas ();
 586 }
 587
 588 bool
 589 Editor::autoscroll_canvas ()
 590 {
 591         nframes_t new_frame;
 592         nframes_t limit = max_frames - current_page_frames();
 593         GdkEventMotion ev;
 594         nframes_t target_frame;
 595
 596         if (autoscroll_direction < 0) {
 597                 if (leftmost_frame < autoscroll_distance) {
 598                         new_frame = 0;
 599                 } else {
 600                         new_frame = leftmost_frame - autoscroll_distance;
 601                 }
 602                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 603         } else {
 604                 if (leftmost_frame > limit - autoscroll_distance) {
 605                         new_frame = limit;
 606                 } else {
 607                         new_frame = leftmost_frame + autoscroll_distance;
 608                 }
 609                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 610         }
 611
 612         /* now fake a motion event to get the object that is being dragged to move too */
 613
 614         ev.type = GDK_MOTION_NOTIFY;
 615         ev.state &= Gdk::BUTTON1_MASK;
 616         ev.x = frame_to_unit (target_frame);
 617         ev.y = drag_info.current_pointer_y;
 618         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 619
 620         if (new_frame == 0 || new_frame == limit) {
 621                 /* we are done */
 622                 return false;
 623         }
 624
 625         autoscroll_cnt++;
 626
 627         if (autoscroll_cnt == 1) {
 628
 629                 /* connect the timeout so that we get called repeatedly */
 630
 631                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 632                 return false;
 633
 634         }
 635
 636         if (new_frame != leftmost_frame) {
 637                 reset_x_origin (new_frame);
 638         }
 639
 640         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 641
 642                 /* after about a while, speed up a bit by changing the timeout interval */
 643
 644                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 645
 646         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 647
 648                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 649
 650         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 651
 652                 /* after about another while, speed up by increasing the shift per callback */
 653
 654                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 655
 656         }
 657
 658         return true;
 659 }
 660
 661 void
 662 Editor::start_canvas_autoscroll (int dir)
 663 {
 664         if (!session || autoscroll_active) {
 665                 return;
 666         }
 667
 668         stop_canvas_autoscroll ();
 669
 670         autoscroll_active = true;
 671         autoscroll_direction = dir;
 672         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 673         autoscroll_cnt = 0;
 674
 675         /* do it right now, which will start the repeated callbacks */
 676
 677         autoscroll_canvas ();
 678 }
 679
 680 void
 681 Editor::stop_canvas_autoscroll ()
 682 {
 683         if (autoscroll_timeout_tag >= 0) {
 684                 g_source_remove (autoscroll_timeout_tag);
 685                 autoscroll_timeout_tag = -1;
 686         }
 687
 688         autoscroll_active = false;
 689 }
 690
 691 gint
 692 Editor::left_track_canvas (GdkEventCrossing *ev)
 693 {
 694         set_entered_track (0);
 695         set_entered_regionview (0);
 696         return FALSE;
 697 }
 698
 699
 700 void
 701 Editor::canvas_horizontally_scrolled ()
 702 {
 703         cerr << "chs\n";
 704
 705         /* this is the core function that controls horizontal scrolling of the canvas. it is called
 706            whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
 707            idle handler, which is important because tempo_map_changed() should issue redraws immediately
 708            and not defer them to an idle handler.
 709         */
 710
 711         leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 712         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 713
 714         if (rightmost_frame > last_canvas_frame) {
 715                 last_canvas_frame = rightmost_frame;
 716                 reset_scrolling_region ();
 717         }
 718
 719         if (logo_item) {
 720                 logo_item->property_x() = horizontal_adjustment.get_value ();
 721         }
 722
 723         update_fixed_rulers ();
 724
 725         redisplay_tempo (!_dragging_hscrollbar);
 726 }
 727
 728 void
 729 Editor::color_handler()
 730 {
 731         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 732         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 733
 734         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 735         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 736
 737         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 738         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 739
 740         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 741         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 742
 743         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 744         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 745
 746         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 747         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 748
 749         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 750         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 751
 752         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 753         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 754
 755         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 756
 757         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 758         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 759
 760         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 761         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 762
 763         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 764         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 765
 766         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 767         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 768
 769         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 770         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 771
 772         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 773         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 774
 775         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 776         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 777         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 778         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 779         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 780
 781         refresh_location_display ();
 782         redisplay_tempo (true);
 783
 784         if (session)
 785                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 786 }
 787