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         /* just scroll stuff for the timecanvas */
 117         time_canvas.signal_scroll_event().connect (mem_fun (*this, &Editor::time_canvas_scroll_event));
 118
 119         track_canvas.set_name ("EditorMainCanvas");
 120         track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
 121         track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
 122         track_canvas.set_flags (CAN_FOCUS);
 123
 124         /* set up drag-n-drop */
 125
 126         vector<TargetEntry> target_table;
 127
 128         // Drag-N-Drop from the region list can generate this target
 129         target_table.push_back (TargetEntry ("regions"));
 130         target_table.push_back (TargetEntry ("routes"));
 131
 132         target_table.push_back (TargetEntry ("text/plain"));
 133         target_table.push_back (TargetEntry ("text/uri-list"));
 134         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 135
 136         track_canvas.drag_dest_set (target_table);
 137         track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
 138
 139         /* stuff for the verbose canvas cursor */
 140
 141         Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
 142
 143         verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
 144         verbose_canvas_cursor->property_font_desc() = *font;
 145         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 146
 147         delete font;
 148
 149         verbose_cursor_visible = false;
 150
 151         if (Profile->get_sae()) {
 152                 Image img (::get_icon (X_("saelogo")));
 153                 logo_item = new ArdourCanvas::Pixbuf (*track_canvas.root(), 0.0, 0.0, img.get_pixbuf());
 154                 // logo_item->property_height_in_pixels() = true;
 155                 // logo_item->property_width_in_pixels() = true;
 156                 // logo_item->property_height_set() = true;
 157                 // logo_item->property_width_set() = true;
 158                 logo_item->show ();
 159         }
 160
 161         /* a group to hold time (measure) lines */
 162
 163         time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 164         tempo_lines = new TempoLines(track_canvas, time_line_group);
 165         cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
 166         time_canvas.set_name ("EditorTimeCanvas");
 167         time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
 168         time_canvas.set_flags (CAN_FOCUS);
 169         time_canvas.set_center_scroll_region (false);
 170         time_canvas.set_dither          (Gdk::RGB_DITHER_NONE);
 171
 172         marker_time_line_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 173         marker_tempo_lines = new TempoLines(time_canvas, marker_time_line_group);
 174
 175         meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
 176         tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
 177         range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
 178         transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
 179         marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
 180         cd_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 5.0);
 181
 182         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 183         tempo_bar->property_outline_what() = (0x1 | 0x8);
 184         tempo_bar->property_outline_pixels() = 1;
 185
 186         meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 187         meter_bar->property_outline_what() = (0x1 | 0x8);
 188         meter_bar->property_outline_pixels() = 1;
 189
 190         marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 191         marker_bar->property_outline_what() = (0x1 | 0x8);
 192         marker_bar->property_outline_pixels() = 1;
 193
 194         cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 195         cd_marker_bar->property_outline_what() = (0x1 | 0x8);
 196         cd_marker_bar->property_outline_pixels() = 1;
 197
 198         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 199         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 200         range_marker_bar->property_outline_pixels() = 1;
 201
 202         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 203         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 204         transport_marker_bar->property_outline_pixels() = 1;
 205
 206         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 207         range_bar_drag_rect->property_outline_pixels() = 0;
 208         range_bar_drag_rect->hide ();
 209
 210         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
 211         transport_bar_drag_rect->property_outline_pixels() = 0;
 212         transport_bar_drag_rect->hide ();
 213
 214         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 215         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 216
 217         marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
 218         marker_drag_line->property_width_pixels() = 1;
 219         marker_drag_line->property_points() = marker_drag_line_points;
 220         marker_drag_line->hide();
 221
 222         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 223         range_marker_drag_rect->hide ();
 224
 225         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 226         transport_loop_range_rect->property_outline_pixels() = 1;
 227         transport_loop_range_rect->hide();
 228
 229         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
 230         transport_punch_range_rect->property_outline_pixels() = 0;
 231         transport_punch_range_rect->hide();
 232
 233         transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
 234
 235         transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
 236         transport_punchin_line->property_x1() = 0.0;
 237         transport_punchin_line->property_y1() = 0.0;
 238         transport_punchin_line->property_x2() = 0.0;
 239         transport_punchin_line->property_y2() = 0.0;
 240         transport_punchin_line->hide ();
 241
 242         transport_punchout_line  = new ArdourCanvas::SimpleLine (*time_line_group);
 243         transport_punchout_line->property_x1() = 0.0;
 244         transport_punchout_line->property_y1() = 0.0;
 245         transport_punchout_line->property_x2() = 0.0;
 246         transport_punchout_line->property_y2() = 0.0;
 247         transport_punchout_line->hide();
 248
 249         // used to show zoom mode active zooming
 250         zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 251         zoom_rect->property_outline_pixels() = 1;
 252         zoom_rect->hide();
 253
 254         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 255
 256         // used as rubberband rect
 257         rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
 258         rubberband_rect->property_outline_pixels() = 1;
 259         rubberband_rect->hide();
 260
 261         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 262         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 263         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 264         cd_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_cd_marker_bar_event), cd_marker_bar));
 265         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 266         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 267
 268         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
 269         ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
 270
 271         double time_height = timebar_height * 5;
 272         double time_width = FLT_MAX/frames_per_unit;
 273         time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
 274
 275         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 276
 277         initial_ruler_update_required = true;
 278         track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 279
 280         if (logo_item) {
 281                 logo_item->lower_to_bottom ();
 282         }
 283
 284         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 285         color_handler();
 286
 287 }
 288
 289 void
 290 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 291 {
 292         canvas_allocation = alloc;
 293
 294         if (!initial_ruler_update_required) {
 295                 if (!canvas_idle_queued) {
 296                         /* call this first so that we do stuff before any pending redraw */
 297                         Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 298                         canvas_idle_queued = true;
 299                 }
 300                 return;
 301         }
 302
 303         initial_ruler_update_required = false;
 304         track_canvas_size_allocated ();
 305 }
 306
 307 bool
 308 Editor::track_canvas_size_allocated ()
 309 {
 310         if (canvas_idle_queued) {
 311                 canvas_idle_queued = false;
 312         }
 313
 314         canvas_width = canvas_allocation.get_width();
 315         canvas_height = canvas_allocation.get_height();
 316
 317         full_canvas_height = canvas_height;
 318
 319         if (session) {
 320                 TrackViewList::iterator i;
 321                 double height = 0;
 322
 323                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 324                         if ((*i)->control_parent) {
 325                                 height += (*i)->effective_height;
 326                         }
 327                 }
 328
 329                 full_canvas_height = height;
 330         }
 331
 332         zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 333         playhead_cursor->set_position (playhead_cursor->current_frame);
 334
 335         reset_hscrollbar_stepping ();
 336         reset_scrolling_region ();
 337
 338         if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 339
 340         double y1 = vertical_adjustment.get_value ();
 341
 342         for (MarkerSelection::iterator x = selection->markers.begin(); x != selection->markers.end(); ++x) {
 343                 (*x)->set_line_vpos (y1, canvas_height);
 344         }
 345
 346         range_marker_drag_rect->property_y1() = 0.0;
 347         range_marker_drag_rect->property_y2() = canvas_height;
 348         transport_loop_range_rect->property_y1() = 0.0;
 349         transport_loop_range_rect->property_y2() = canvas_height;
 350         transport_punch_range_rect->property_y1() = 0.0;
 351         transport_punch_range_rect->property_y2() = canvas_height;
 352         transport_punchin_line->property_y1() = 0.0;
 353         transport_punchin_line->property_y2() = canvas_height;
 354         transport_punchout_line->property_y1() = 0.0;
 355         transport_punchout_line->property_y2() = canvas_height;
 356
 357         update_fixed_rulers();
 358         redisplay_tempo (true);
 359
 360         Resized (); /* EMIT_SIGNAL */
 361
 362         return false;
 363 }
 364
 365 void
 366 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
 367 {
 368         TreeModel::Children rows = route_display_model->children();
 369         TreeModel::Children::iterator i;
 370         double pos;
 371
 372         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 373                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 374                 if (tv != 0 && !tv->hidden()) {
 375                         pos += tv->effective_height;
 376                 }
 377         }
 378
 379         double last_canvas_unit =  max ((last_canvas_frame / frames_per_unit), canvas_width);
 380
 381         track_canvas.set_scroll_region (0.0, 0.0, last_canvas_unit, pos);
 382
 383         // XXX what is the correct height value for the time canvas ? this overstates it
 384         time_canvas.set_scroll_region ( 0.0, 0.0, last_canvas_unit, canvas_height);
 385
 386         range_marker_drag_rect->property_y2() = canvas_height;
 387         transport_loop_range_rect->property_y2() = canvas_height;
 388         transport_punch_range_rect->property_y2() = canvas_height;
 389         transport_punchin_line->property_y2() = canvas_height;
 390         transport_punchout_line->property_y2() = canvas_height;
 391
 392         update_punch_range_view (true);
 393
 394         controls_layout.queue_resize();
 395 }
 396
 397 void
 398 Editor::controls_layout_size_request (Requisition* req)
 399 {
 400         TreeModel::Children rows = route_display_model->children();
 401         TreeModel::Children::iterator i;
 402         double pos;
 403
 404         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 405                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 406                 if (tv != 0) {
 407                         pos += tv->effective_height;
 408                 }
 409         }
 410
 411         RefPtr<Gdk::Screen> screen = get_screen();
 412
 413         if (!screen) {
 414                 screen = Gdk::Screen::get_default();
 415         }
 416
 417         edit_controls_vbox.check_resize();
 418         req->width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 419
 420         /* don't get too big. the fudge factors here are just guesses */
 421
 422         req->width = min (req->width, screen->get_width() - 300);
 423         req->height = min ((gint) pos, (screen->get_height() - 400));
 424
 425         /* this one is important: it determines how big the layout thinks it really is, as
 426            opposed to what it displays on the screen
 427         */
 428
 429         controls_layout.set_size (edit_controls_vbox.get_width(), (gint) pos);
 430         controls_layout.set_size_request(edit_controls_vbox.get_width(), -1);
 431         zoom_box.set_size_request(edit_controls_vbox.get_width(), -1);
 432         time_button_frame.set_size_request(edit_controls_vbox.get_width(), -1);
 433
 434         //cerr << "sizes = " << req->width << " " << edit_controls_vbox.get_width() << " " << controls_layout.get_width() << " " << zoom_box.get_width() << " " << time_button_frame.get_width() << endl;//DEBUG
 435 }
 436
 437 bool
 438 Editor::track_canvas_map_handler (GdkEventAny* ev)
 439 {
 440         track_canvas.get_window()->set_cursor (*current_canvas_cursor);
 441         return false;
 442 }
 443
 444 bool
 445 Editor::time_canvas_map_handler (GdkEventAny* ev)
 446 {
 447         time_canvas.get_window()->set_cursor (*timebar_cursor);
 448         return false;
 449 }
 450
 451 void
 452 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 453                                          int x, int y,
 454                                          const SelectionData& data,
 455                                          guint info, guint time)
 456 {
 457         cerr << "drop on canvas, target = " << data.get_target() << endl;
 458
 459         if (data.get_target() == "regions") {
 460                 drop_regions (context, x, y, data, info, time);
 461         }
 462         else if(data.get_target() == "routes") {
 463                 drop_routes (context, x, y, data, info, time);
 464         }
 465         else {
 466                 drop_paths (context, x, y, data, info, time);
 467         }
 468 }
 469
 470 void
 471 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 472                     int x, int y,
 473                     const SelectionData& data,
 474                     guint info, guint time)
 475 {
 476         TimeAxisView* tvp;
 477         RouteTimeAxisView* tv;
 478         double cy;
 479         vector<ustring> paths;
 480         string spath;
 481         GdkEvent ev;
 482         nframes64_t frame;
 483
 484         if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
 485                 goto out;
 486         }
 487
 488         /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 489          */
 490
 491         double wx;
 492         double wy;
 493
 494         track_canvas.window_to_world (x, y, wx, wy);
 495         wx += horizontal_adjustment.get_value();
 496         wy += vertical_adjustment.get_value();
 497
 498         ev.type = GDK_BUTTON_RELEASE;
 499         ev.button.x = wx;
 500         ev.button.y = wy;
 501
 502         frame = event_frame (&ev, 0, &cy);
 503
 504         snap_to (frame);
 505
 506         if ((tvp = trackview_by_y_position (cy)) == 0) {
 507
 508                 /* drop onto canvas background: create new tracks */
 509
 510                 do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 511
 512         } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
 513
 514                 /* check that its an audio track, not a bus */
 515
 516                 /* check that its an audio track, not a bus */
 517
 518                 if (tv->get_diskstream()) {
 519                         /* select the track, then embed */
 520                         selection->set (tv);
 521                         do_embed (paths, Editing::ImportDistinctFiles, ImportToTrack, frame);
 522                 }
 523         }
 524
 525   out:
 526         context->drag_finish (true, false, time);
 527 }
 528
 529 void
 530 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 531                       int x, int y,
 532                       const SelectionData& data,
 533                       guint info, guint time)
 534 {
 535         const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
 536                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
 537
 538         for (uint32_t i = 0; i < sr->cnt; ++i) {
 539
 540                 boost::shared_ptr<Region> r = sr->data[i];
 541
 542                 insert_region_list_drag (r, x, y);
 543         }
 544
 545         context->drag_finish (true, false, time);
 546 }
 547
 548 void
 549 Editor::drop_routes (const Glib::RefPtr<Gdk::DragContext>& context,
 550                      int x, int y,
 551                      const Gtk::SelectionData& data,
 552                      guint info, guint time) {
 553         const SerializedObjectPointers<boost::shared_ptr<Route> >* sr =
 554                 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Route> > *> (data.get_data());
 555
 556         for (uint32_t i = 0; i < sr->cnt; ++i) {
 557                 boost::shared_ptr<Route> r = sr->data[i];
 558                 insert_route_list_drag (r, x, y);
 559         }
 560
 561         context->drag_finish (true, false, time);
 562 }
 563
 564 void
 565 Editor::maybe_autoscroll (GdkEvent* event)
 566 {
 567         nframes_t rightmost_frame = leftmost_frame + current_page_frames();
 568         nframes_t frame = drag_info.current_pointer_frame;
 569         bool startit = false;
 570
 571         static int last_autoscroll_direction = 0;
 572
 573         if (frame > rightmost_frame) {
 574
 575                 if (rightmost_frame < max_frames) {
 576                         autoscroll_direction = 1;
 577                         startit = true;
 578                 }
 579
 580         } else if (frame < leftmost_frame) {
 581
 582                 if (leftmost_frame > 0) {
 583                         autoscroll_direction = -1;
 584                         startit = true;
 585                 }
 586
 587         } else {
 588
 589                 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
 590                         autoscroll_direction = -1;
 591                 } else {
 592                         autoscroll_direction = 1;
 593                 }
 594         }
 595
 596
 597         if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
 598                 stop_canvas_autoscroll ();
 599         }
 600
 601         if (startit && autoscroll_timeout_tag < 0) {
 602                 start_canvas_autoscroll (autoscroll_direction);
 603         }
 604
 605         last_autoscroll_direction = autoscroll_direction;
 606 }
 607
 608 gint
 609 Editor::_autoscroll_canvas (void *arg)
 610 {
 611         return ((Editor *) arg)->autoscroll_canvas ();
 612 }
 613
 614 bool
 615 Editor::autoscroll_canvas ()
 616 {
 617         nframes_t new_frame;
 618         nframes_t limit = max_frames - current_page_frames();
 619         GdkEventMotion ev;
 620         nframes_t target_frame;
 621
 622         if (autoscroll_direction < 0) {
 623                 if (leftmost_frame < autoscroll_distance) {
 624                         new_frame = 0;
 625                 } else {
 626                         new_frame = leftmost_frame - autoscroll_distance;
 627                 }
 628                 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
 629         } else {
 630                 if (leftmost_frame > limit - autoscroll_distance) {
 631                         new_frame = limit;
 632                 } else {
 633                         new_frame = leftmost_frame + autoscroll_distance;
 634                 }
 635                 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
 636         }
 637
 638         /* now fake a motion event to get the object that is being dragged to move too */
 639
 640         ev.type = GDK_MOTION_NOTIFY;
 641         ev.state &= Gdk::BUTTON1_MASK;
 642         ev.x = frame_to_unit (target_frame);
 643         ev.y = drag_info.current_pointer_y;
 644         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 645
 646         if (new_frame == 0 || new_frame == limit) {
 647                 /* we are done */
 648                 return false;
 649         }
 650
 651         autoscroll_cnt++;
 652
 653         if (autoscroll_cnt == 1) {
 654
 655                 /* connect the timeout so that we get called repeatedly */
 656
 657                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 658                 return false;
 659
 660         }
 661
 662         if (new_frame != leftmost_frame) {
 663                 reset_x_origin (new_frame);
 664         }
 665
 666         if (autoscroll_cnt == 50) { /* 0.5 seconds */
 667
 668                 /* after about a while, speed up a bit by changing the timeout interval */
 669
 670                 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
 671
 672         } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
 673
 674                 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
 675
 676         } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
 677
 678                 /* after about another while, speed up by increasing the shift per callback */
 679
 680                 autoscroll_distance =  (nframes_t) floor (current_page_frames()/10.0f);
 681
 682         }
 683
 684         return true;
 685 }
 686
 687 void
 688 Editor::start_canvas_autoscroll (int dir)
 689 {
 690         if (!session || autoscroll_active) {
 691                 return;
 692         }
 693
 694         stop_canvas_autoscroll ();
 695
 696         autoscroll_active = true;
 697         autoscroll_direction = dir;
 698         autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
 699         autoscroll_cnt = 0;
 700
 701         /* do it right now, which will start the repeated callbacks */
 702
 703         autoscroll_canvas ();
 704 }
 705
 706 void
 707 Editor::stop_canvas_autoscroll ()
 708 {
 709         if (autoscroll_timeout_tag >= 0) {
 710                 g_source_remove (autoscroll_timeout_tag);
 711                 autoscroll_timeout_tag = -1;
 712         }
 713
 714         autoscroll_active = false;
 715 }
 716
 717 gint
 718 Editor::left_track_canvas (GdkEventCrossing *ev)
 719 {
 720         set_entered_track (0);
 721         set_entered_regionview (0);
 722         return FALSE;
 723 }
 724
 725 void
 726 Editor::tie_vertical_scrolling ()
 727 {
 728         double y1 = vertical_adjustment.get_value();
 729
 730         playhead_cursor->set_y_axis (y1);
 731
 732         range_marker_drag_rect->property_y1() = y1;
 733         range_marker_drag_rect->property_y2() = y1 + canvas_height;
 734         transport_loop_range_rect->property_y1() = y1;
 735         transport_loop_range_rect->property_y2() = y1 + canvas_height;
 736         transport_punch_range_rect->property_y1() = y1;
 737         transport_punch_range_rect->property_y2() = y1 + canvas_height;
 738         transport_punchin_line->property_y1() = y1;
 739         transport_punchin_line->property_y2() = y1 + canvas_height;
 740         transport_punchout_line->property_y1() = y1;
 741         transport_punchout_line->property_y2() = y1 + canvas_height;
 742
 743         if (!selection->markers.empty()) {
 744                 for (MarkerSelection::iterator x = selection->markers.begin(); x != selection->markers.end(); ++x) {
 745                         (*x)->set_line_vpos (y1, canvas_height);
 746                 }
 747         }
 748
 749         if (logo_item) {
 750                 logo_item->property_y() = y1;
 751         }
 752
 753         /* this will do an immediate redraw */
 754
 755         controls_layout.get_vadjustment()->set_value (y1);
 756 }
 757
 758 void
 759 Editor::canvas_horizontally_scrolled ()
 760 {
 761         nframes64_t time_origin = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 762
 763         if (time_origin != leftmost_frame) {
 764                 canvas_scroll_to (time_origin);
 765         }
 766 }
 767
 768 void
 769 Editor::canvas_scroll_to (nframes64_t time_origin)
 770 {
 771         leftmost_frame = time_origin;
 772         nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 773
 774         if (rightmost_frame > last_canvas_frame) {
 775                 last_canvas_frame = rightmost_frame;
 776                 reset_scrolling_region ();
 777         }
 778
 779         if (logo_item) {
 780                 logo_item->property_x() = horizontal_adjustment.get_value ();
 781         }
 782
 783         update_fixed_rulers ();
 784
 785         redisplay_tempo (!_dragging_hscrollbar);
 786 }
 787
 788 void
 789 Editor::color_handler()
 790 {
 791         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 792         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 793
 794         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 795         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 796
 797         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 798         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 799
 800         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 801         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 802
 803         cd_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CDMarkerBar.get();
 804         cd_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 805
 806         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 807         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 808
 809         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 810         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 811
 812         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 813         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 814
 815         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 816         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 817
 818         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 819
 820         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 821         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 822
 823         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 824         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 825
 826         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 827         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 828
 829         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 830         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 831
 832         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 833         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 834
 835         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 836         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 837
 838         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 839         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 840         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 841         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 842         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 843
 844         refresh_location_display ();
 845         redisplay_tempo (true);
 846
 847         if (session)
 848                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 849 }
 850