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 <libgnomecanvasmm/pixbuf.h>
  22 #include <jack/types.h>
  23 #include <gtkmm2ext/utils.h>
  24
  25 #include <ardour/audioregion.h>
  26 #include <ardour/profile.h>
  27
  28 #include "ardour_ui.h"
  29 #include "editor.h"
  30 #include "waveview.h"
  31 #include "simplerect.h"
  32 #include "simpleline.h"
  33 #include "imageframe.h"
  34 #include "waveview_p.h"
  35 #include "simplerect_p.h"
  36 #include "simpleline_p.h"
  37 #include "imageframe_p.h"
  38 #include "canvas_impl.h"
  39 #include "editing.h"
  40 #include "rgb_macros.h"
  41 #include "utils.h"
  42 #include "time_axis_view.h"
  43 #include "audio_time_axis.h"
  44
  45 #include "i18n.h"
  46
  47 using namespace std;
  48 using namespace sigc;
  49 using namespace ARDOUR;
  50 using namespace PBD;
  51 using namespace Gtk;
  52 using namespace Glib;
  53 using namespace Gtkmm2ext;
  54 using namespace Editing;
  55
  56 /* XXX this is a hack. it ought to be the maximum value of an nframes64_t */
  57
  58 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
  59
  60 extern "C"
  61 {
  62
  63 GType gnome_canvas_simpleline_get_type(void);
  64 GType gnome_canvas_simplerect_get_type(void);
  65 GType gnome_canvas_waveview_get_type(void);
  66 GType gnome_canvas_imageframe_get_type(void);
  67
  68 }
  69
  70 static void ardour_canvas_type_init()
  71 {
  72         // Map gtypes to gtkmm wrapper-creation functions:
  73
  74         Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
  75         Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
  76         Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
  77         Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
  78
  79         // Register the gtkmm gtypes:
  80
  81         (void) Gnome::Canvas::WaveView::get_type();
  82         (void) Gnome::Canvas::SimpleLine::get_type();
  83         (void) Gnome::Canvas::SimpleRect::get_type();
  84         (void) Gnome::Canvas::ImageFrame::get_type();
  85 }
  86
  87 void
  88 Editor::initialize_canvas ()
  89 {
  90         if (getenv ("ARDOUR_NON_AA_CANVAS")) {
  91                 track_canvas = new ArdourCanvas::Canvas ();
  92         } else {
  93                 track_canvas = new ArdourCanvas::CanvasAA ();
  94         }
  95
  96         ArdourCanvas::init ();
  97         ardour_canvas_type_init ();
  98
  99         /* don't try to center the canvas */
 100
 101         track_canvas->set_center_scroll_region (false);
 102         track_canvas->set_dither (Gdk::RGB_DITHER_NONE);
 103
 104         Glib::RefPtr<Gdk::Screen> screen = get_screen();
 105
 106         if (!screen) {
 107                 screen = Gdk::Screen::get_default();
 108         }
 109         physical_screen_width = screen->get_width ();
 110         physical_screen_height = screen->get_height ();
 111
 112         /* stuff for the verbose canvas cursor */
 113
 114         Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
 115
 116         verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas->root());
 117         verbose_canvas_cursor->property_font_desc() = *font;
 118         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 119
 120         delete font;
 121
 122         verbose_cursor_visible = false;
 123
 124         /* on the bottom, an image */
 125
 126         if (Profile->get_sae()) {
 127                 Image img (::get_icon (X_("saelogo")));
 128                 logo_item = new ArdourCanvas::Pixbuf (*track_canvas->root(), 0.0, 0.0, img.get_pixbuf());
 129                 // logo_item->property_height_in_pixels() = true;
 130                 // logo_item->property_width_in_pixels() = true;
 131                 // logo_item->property_height_set() = true;
 132                 // logo_item->property_width_set() = true;
 133                 logo_item->show ();
 134         }
 135
 136         /* a group to hold time (measure) lines */
 137         time_line_group = new ArdourCanvas::Group (*track_canvas->root());
 138
 139 #ifdef GTKOSX
 140         /*XXX please don't laugh. this actually improves canvas performance on osx */
 141         bogus_background_rect =  new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, max_canvas_coordinate/3, physical_screen_height);
 142         bogus_background_rect->property_outline_pixels() = 0;
 143 #endif
 144         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, physical_screen_height);
 145         transport_loop_range_rect->property_outline_pixels() = 1;
 146         transport_loop_range_rect->hide();
 147
 148         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, physical_screen_height);
 149         transport_punch_range_rect->property_outline_pixels() = 0;
 150         transport_punch_range_rect->hide();
 151
 152         _background_group = new ArdourCanvas::Group (*track_canvas->root());
 153         _master_group = new ArdourCanvas::Group (*track_canvas->root());
 154
 155         range_marker_drag_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, physical_screen_height);
 156         range_marker_drag_rect->hide ();
 157
 158         _trackview_group = new ArdourCanvas::Group (*_master_group);
 159         _region_motion_group = new ArdourCanvas::Group (*_trackview_group);
 160
 161         meter_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 162         if (Profile->get_sae()) {
 163                 meter_bar = new ArdourCanvas::SimpleRect (*meter_bar_group, 0.0, 0.0, physical_screen_width, timebar_height - 1);
 164                 meter_bar->property_outline_pixels() = 1;
 165         } else {
 166                 meter_bar = new ArdourCanvas::SimpleRect (*meter_bar_group, 0.0, 0.0, physical_screen_width, timebar_height);
 167                 meter_bar->property_outline_pixels() = 0;
 168         }
 169         meter_bar->property_outline_what() = (0x1 | 0x8);
 170
 171         tempo_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 172         if (Profile->get_sae()) {
 173                 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 174                 tempo_bar->property_outline_pixels() = 1;
 175         } else {
 176                 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 177                 tempo_bar->property_outline_pixels() = 0;
 178         }
 179         tempo_bar->property_outline_what() = (0x1 | 0x8);
 180
 181         range_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 182         if (Profile->get_sae()) {
 183                 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 184                 range_marker_bar->property_outline_pixels() = 1;
 185         } else {
 186                 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 187                 range_marker_bar->property_outline_pixels() = 0;
 188         }
 189         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 190
 191         transport_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 192         if (Profile->get_sae()) {
 193                 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_bar_group, 0.0, 0.0,  physical_screen_width, (timebar_height - 1));
 194                 transport_marker_bar->property_outline_pixels() = 1;
 195         } else {
 196                 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_bar_group, 0.0, 0.0,  physical_screen_width, (timebar_height));
 197                 transport_marker_bar->property_outline_pixels() = 0;
 198         }
 199         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 200
 201         marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 202         if (Profile->get_sae()) {
 203                 marker_bar = new ArdourCanvas::SimpleRect (*marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 204                 marker_bar->property_outline_pixels() = 1;
 205         } else {
 206                 marker_bar = new ArdourCanvas::SimpleRect (*marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 207                 marker_bar->property_outline_pixels() = 0;
 208         }
 209         marker_bar->property_outline_what() = (0x1 | 0x8);
 210
 211         cd_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 212         if (Profile->get_sae()) {
 213                 cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 214                 cd_marker_bar->property_outline_pixels() = 1;
 215         } else {
 216                 cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 217                 cd_marker_bar->property_outline_pixels() = 0;
 218         }
 219         cd_marker_bar->property_outline_what() = (0x1 | 0x8);
 220
 221         timebar_group =  new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 222         cursor_group = new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 223
 224         meter_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 5.0);
 225         tempo_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 4.0);
 226         range_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 3.0);
 227         transport_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 2.0);
 228         marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height);
 229         cd_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, 0.0);
 230
 231         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
 232         marker_drag_line_points.push_back(Gnome::Art::Point(0.0, physical_screen_height));
 233
 234         marker_drag_line = new ArdourCanvas::Line (*timebar_group);
 235         marker_drag_line->property_width_pixels() = 1;
 236         marker_drag_line->property_points() = marker_drag_line_points;
 237         marker_drag_line->hide();
 238
 239         cd_marker_bar_drag_rect = new ArdourCanvas::SimpleRect (*cd_marker_group, 0.0, 0.0, 100, timebar_height);
 240         cd_marker_bar_drag_rect->property_outline_pixels() = 0;
 241         cd_marker_bar_drag_rect->hide ();
 242
 243         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, 100, timebar_height);
 244         range_bar_drag_rect->property_outline_pixels() = 0;
 245         range_bar_drag_rect->hide ();
 246
 247         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, 100, timebar_height);
 248         transport_bar_drag_rect->property_outline_pixels() = 0;
 249         transport_bar_drag_rect->hide ();
 250
 251         transport_punchin_line = new ArdourCanvas::SimpleLine (*_master_group);
 252         transport_punchin_line->property_x1() = 0.0;
 253         transport_punchin_line->property_y1() = 0.0;
 254         transport_punchin_line->property_x2() = 0.0;
 255         transport_punchin_line->property_y2() = physical_screen_height;
 256         transport_punchin_line->hide ();
 257
 258         transport_punchout_line  = new ArdourCanvas::SimpleLine (*_master_group);
 259         transport_punchout_line->property_x1() = 0.0;
 260         transport_punchout_line->property_y1() = 0.0;
 261         transport_punchout_line->property_x2() = 0.0;
 262         transport_punchout_line->property_y2() = physical_screen_height;
 263         transport_punchout_line->hide();
 264
 265         // used to show zoom mode active zooming
 266         zoom_rect = new ArdourCanvas::SimpleRect (*_master_group, 0.0, 0.0, 0.0, 0.0);
 267         zoom_rect->property_outline_pixels() = 1;
 268         zoom_rect->hide();
 269
 270         zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 271
 272         // used as rubberband rect
 273         rubberband_rect = new ArdourCanvas::SimpleRect (*_trackview_group, 0.0, 0.0, 0.0, 0.0);
 274
 275         rubberband_rect->property_outline_pixels() = 1;
 276         rubberband_rect->hide();
 277
 278         tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 279         meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 280         marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 281         cd_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_cd_marker_bar_event), cd_marker_bar));
 282         range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 283         transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 284
 285         playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
 286
 287         if (logo_item) {
 288                 logo_item->lower_to_bottom ();
 289         }
 290         /* need to handle 4 specific types of events as catch-alls */
 291
 292         track_canvas->signal_scroll_event().connect (mem_fun (*this, &Editor::track_canvas_scroll_event));
 293         track_canvas->signal_motion_notify_event().connect (mem_fun (*this, &Editor::track_canvas_motion_notify_event));
 294         track_canvas->signal_button_press_event().connect (mem_fun (*this, &Editor::track_canvas_button_press_event));
 295         track_canvas->signal_button_release_event().connect (mem_fun (*this, &Editor::track_canvas_button_release_event));
 296
 297         track_canvas->set_name ("EditorMainCanvas");
 298         track_canvas->add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
 299         track_canvas->signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
 300         track_canvas->signal_enter_notify_event().connect (mem_fun(*this, &Editor::entered_track_canvas));
 301         track_canvas->set_flags (CAN_FOCUS);
 302
 303         /* set up drag-n-drop */
 304
 305         vector<TargetEntry> target_table;
 306
 307         // Drag-N-Drop from the region list can generate this target
 308         target_table.push_back (TargetEntry ("regions"));
 309
 310         target_table.push_back (TargetEntry ("text/plain"));
 311         target_table.push_back (TargetEntry ("text/uri-list"));
 312         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 313
 314         track_canvas->drag_dest_set (target_table);
 315         track_canvas->signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
 316
 317         track_canvas->signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
 318
 319         ColorsChanged.connect (mem_fun (*this, &Editor::color_handler));
 320         color_handler();
 321
 322 }
 323
 324 void
 325 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 326 {
 327         canvas_allocation = alloc;
 328         track_canvas_size_allocated ();
 329 }
 330
 331 bool
 332 Editor::track_canvas_size_allocated ()
 333 {
 334         bool height_changed = canvas_height != canvas_allocation.get_height();
 335
 336         canvas_width = canvas_allocation.get_width();
 337         canvas_height = canvas_allocation.get_height();
 338
 339         if (session) {
 340                 TrackViewList::iterator i;
 341                 double height = 0;
 342
 343                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 344                         if ((*i)->control_parent) {
 345                                 height += (*i)->effective_height;
 346                         }
 347                         (*i)->clip_to_viewport ();
 348                 }
 349
 350                 full_canvas_height = height + canvas_timebars_vsize;
 351         }
 352
 353         if (height_changed) {
 354                 if (playhead_cursor) {
 355                         playhead_cursor->set_length (canvas_height);
 356                 }
 357
 358                 for (MarkerSelection::iterator x = selection->markers.begin(); x != selection->markers.end(); ++x) {
 359                         (*x)->set_line_vpos (0, canvas_height);
 360                 }
 361
 362                 vertical_adjustment.set_page_size (canvas_height);
 363                 last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 364                 if ((vertical_adjustment.get_value() + canvas_height) >= vertical_adjustment.get_upper()) {
 365                         /*
 366                            We're increasing the size of the canvas while the bottom is visible.
 367                            We scroll down to keep in step with the controls layout.
 368                         */
 369                         vertical_adjustment.set_value (full_canvas_height - canvas_height);
 370                 }
 371         }
 372
 373         handle_new_duration ();
 374         reset_hscrollbar_stepping ();
 375         update_fixed_rulers();
 376         redisplay_tempo (false);
 377
 378         Resized (); /* EMIT_SIGNAL */
 379
 380         return false;
 381 }
 382
 383 void
 384 Editor::controls_layout_size_request (Requisition* req)
 385 {
 386         TreeModel::Children rows = route_display_model->children();
 387         TreeModel::Children::iterator i;
 388         double pos;
 389         bool changed = false;
 390
 391         for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
 392                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 393                 if (tv != 0) {
 394                         pos += tv->effective_height;
 395                         tv->clip_to_viewport ();
 396                 }
 397         }
 398
 399         gint height = min ((gint) pos, (gint) (physical_screen_height - 600));
 400         gint width = max (edit_controls_vbox.get_width(),  controls_layout.get_width());
 401
 402         /* don't get too big. the fudge factors here are just guesses */
 403
 404         width =  min (width, (gint) (physical_screen_width - 300));
 405
 406         if ((req->width != width) || (req->height != height)) {
 407                 changed = true;
 408                 controls_layout_size_request_connection.disconnect ();
 409         }
 410
 411         if (req->width != width) {
 412                 gint vbox_width = edit_controls_vbox.get_width();
 413                 req->width = width;
 414
 415                 /* this one is important: it determines how big the layout thinks it really is, as
 416                    opposed to what it displays on the screen
 417                 */
 418                 controls_layout.property_width () = vbox_width;
 419                 controls_layout.property_width_request () = vbox_width;
 420
 421                 time_button_event_box.property_width_request () = vbox_width;
 422                 zoom_box.property_width_request () = vbox_width;
 423         }
 424
 425         if (req->height != height) {
 426                 req->height = height;
 427                 controls_layout.property_height () = (guint) floor (pos);
 428                 controls_layout.property_height_request () = height;
 429         }
 430
 431         if (changed) {
 432                 controls_layout_size_request_connection = controls_layout.signal_size_request().connect (mem_fun (*this, &Editor::controls_layout_size_request));
 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 void
 445 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 446                                          int x, int y,
 447                                          const SelectionData& data,
 448                                          guint info, guint time)
 449 {
 450         if (data.get_target() == "regions") {
 451                 drop_regions (context, x, y, data, info, time);
 452         } else {
 453                 drop_paths (context, x, y, data, info, time);
 454         }
 455 }
 456
 457 bool
 458 Editor::idle_drop_paths (vector<ustring> paths, nframes64_t frame, double ypos)
 459 {
 460         drop_paths_part_two (paths, frame, ypos);
 461         return false;
 462 }
 463
 464 void
 465 Editor::drop_paths_part_two (const vector<ustring>& paths, nframes64_t frame, double ypos)
 466 {
 467         TimeAxisView* tvp;
 468         AudioTimeAxisView* tv;
 469
 470         if ((tvp = trackview_by_y_position (ypos)) == 0) {
 471
 472                 /* drop onto canvas background: create new tracks */
 473
 474                 frame = 0;
 475
 476                 if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 477                         do_import (paths, Editing::ImportDistinctFiles, Editing::ImportAsTrack, SrcBest, frame);
 478                 } else {
 479                         do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 480                 }
 481
 482         } else if ((tv = dynamic_cast<AudioTimeAxisView*>(tvp)) != 0) {
 483
 484                 /* check that its an audio track, not a bus */
 485
 486                 if (tv->get_diskstream()) {
 487                         /* select the track, then embed/import */
 488                         selection->set (tv);
 489
 490                         if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 491                                 do_import (paths, Editing::ImportSerializeFiles, Editing::ImportToTrack, SrcBest, frame);
 492                         } else {
 493                                 do_embed (paths, Editing::ImportSerializeFiles, ImportToTrack, frame);
 494                         }
 495                 }
 496         }
 497 }
 498
 499 void
 500 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 501                     int x, int y,
 502                     const SelectionData& data,
 503                     guint info, guint time)
 504 {
 505         vector<ustring> paths;
 506         GdkEvent ev;
 507         nframes64_t frame;
 508         double wx;
 509         double wy;
 510         double cy;
 511
 512         if (convert_drop_to_paths (paths, context, x, y, data, info, time) == 0) {
 513
 514                 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 515                  */
 516
 517                 track_canvas->window_to_world (x, y, wx, wy);
 518
 519                 ev.type = GDK_BUTTON_RELEASE;
 520                 ev.button.x = wx;
 521                 ev.button.y = wy;
 522
 523                 frame = event_frame (&ev, 0, &cy);
 524
 525                 snap_to (frame);
 526
 527 #ifdef GTKOSX
 528                 /* We are not allowed to call recursive main event loops from within
 529                    the main event loop with GTK/Quartz. Since import/embed wants
 530                    to push up a progress dialog, defer all this till we go idle.
 531                 */
 532                 Glib::signal_idle().connect (bind (mem_fun (*this, &Editor::idle_drop_paths), paths, frame, cy));
 533 #else
 534                 drop_paths_part_two (paths, frame, cy);
 535 #endif
 536         }
 537
 538         context->drag_finish (true, false, time);
 539 }
 540
 541 void
 542 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
 543                       int x, int y,
 544                       const SelectionData& data,
 545                       guint info, guint time)
 546 {
 547         std::list<boost::shared_ptr<Region> > regions;
 548         region_list_display.get_object_drag_data (regions);
 549
 550         for (list<boost::shared_ptr<Region> >::iterator r = regions.begin(); r != regions.end(); ++r) {
 551
 552                 boost::shared_ptr<AudioRegion> ar;
 553
 554                 if ((ar = boost::dynamic_pointer_cast<AudioRegion>(*r)) != 0) {
 555                         insert_region_list_drag (ar, x, y);
 556                 }
 557         }
 558
 559         context->drag_finish (true, false, time);
 560 }
 561
 562 void
 563 Editor::maybe_autoscroll (GdkEventMotion* event)
 564 {
 565
 566         nframes64_t rightmost_frame = leftmost_frame + current_page_frames();
 567         nframes64_t frame = drag_info.current_pointer_frame;
 568         bool startit = false;
 569
 570         autoscroll_y = 0;
 571         autoscroll_x = 0;
 572         if (event->y < canvas_timebars_vsize) {
 573                 autoscroll_y = -1;
 574                 startit = true;
 575         } else if (event->y > canvas_height) {
 576                 autoscroll_y = 1;
 577                 startit = true;
 578         }
 579
 580         if (frame > rightmost_frame) {
 581
 582                 if (rightmost_frame < max_frames) {
 583                         autoscroll_x = 1;
 584                         startit = true;
 585                 }
 586
 587         } else if (frame < leftmost_frame) {
 588                 if (leftmost_frame > 0) {
 589                         autoscroll_x = -1;
 590                         startit = true;
 591                 }
 592
 593         }
 594
 595         if (!allow_vertical_scroll) {
 596                 autoscroll_y = 0;
 597         }
 598
 599         if ((autoscroll_x != last_autoscroll_x) || (autoscroll_y != last_autoscroll_y) || (autoscroll_x == 0 && autoscroll_y == 0)) {
 600                 stop_canvas_autoscroll ();
 601         }
 602
 603         if (startit && autoscroll_timeout_tag < 0) {
 604                 start_canvas_autoscroll (autoscroll_x, autoscroll_y);
 605         }
 606
 607         last_autoscroll_x = autoscroll_x;
 608         last_autoscroll_y = autoscroll_y;
 609 }
 610
 611 void
 612 Editor::maybe_autoscroll_horizontally (GdkEventMotion* event)
 613 {
 614         nframes64_t rightmost_frame = leftmost_frame + current_page_frames();
 615         nframes64_t frame = drag_info.current_pointer_frame;
 616         bool startit = false;
 617
 618         autoscroll_y = 0;
 619         autoscroll_x = 0;
 620
 621         if (frame > rightmost_frame) {
 622
 623                 if (rightmost_frame < max_frames) {
 624                         autoscroll_x = 1;
 625                         startit = true;
 626                 }
 627
 628         } else if (frame < leftmost_frame) {
 629                 if (leftmost_frame > 0) {
 630                         autoscroll_x = -1;
 631                         startit = true;
 632                 }
 633
 634         }
 635
 636         if ((autoscroll_x != last_autoscroll_x) || (autoscroll_y != last_autoscroll_y) || (autoscroll_x == 0 && autoscroll_y == 0)) {
 637                 stop_canvas_autoscroll ();
 638         }
 639
 640         if (startit && autoscroll_timeout_tag < 0) {
 641                 start_canvas_autoscroll (autoscroll_x, autoscroll_y);
 642         }
 643
 644         last_autoscroll_x = autoscroll_x;
 645         last_autoscroll_y = autoscroll_y;
 646 }
 647
 648 gint
 649 Editor::_autoscroll_canvas (void *arg)
 650 {
 651         return ((Editor *) arg)->autoscroll_canvas ();
 652 }
 653
 654 bool
 655 Editor::autoscroll_canvas ()
 656 {
 657         nframes64_t new_frame;
 658         nframes64_t limit = max_frames - current_page_frames();
 659         GdkEventMotion ev;
 660         double new_pixel;
 661         double target_pixel;
 662
 663         if (autoscroll_x_distance != 0) {
 664                 if (autoscroll_x > 0) {
 665                         autoscroll_x_distance = (unit_to_frame (drag_info.current_pointer_x) - (leftmost_frame + current_page_frames())) / 3;
 666                 } else if (autoscroll_x < 0) {
 667                         autoscroll_x_distance = (leftmost_frame - unit_to_frame (drag_info.current_pointer_x)) / 3;
 668
 669                 }
 670         }
 671
 672         if (autoscroll_y_distance != 0) {
 673                 if (autoscroll_y > 0) {
 674                         autoscroll_y_distance = (drag_info.current_pointer_y - (get_trackview_group_vertical_offset() + canvas_height)) / 3;
 675                 } else if (autoscroll_y < 0) {
 676
 677                         autoscroll_y_distance = (vertical_adjustment.get_value () - drag_info.current_pointer_y) / 3;
 678                 }
 679         }
 680
 681         if (autoscroll_x < 0) {
 682                 if (leftmost_frame < autoscroll_x_distance) {
 683                         new_frame = 0;
 684                 } else {
 685                         new_frame = leftmost_frame - autoscroll_x_distance;
 686                 }
 687         } else if (autoscroll_x > 0) {
 688                 if (leftmost_frame > limit - autoscroll_x_distance) {
 689                         new_frame = limit;
 690                 } else {
 691                         new_frame = leftmost_frame + autoscroll_x_distance;
 692                 }
 693         } else {
 694                 new_frame = leftmost_frame;
 695         }
 696
 697         double vertical_pos = vertical_adjustment.get_value();
 698
 699         if (autoscroll_y < 0) {
 700
 701                 if (vertical_pos < autoscroll_y_distance) {
 702                         new_pixel = 0;
 703                 } else {
 704                         new_pixel = vertical_pos - autoscroll_y_distance;
 705                 }
 706
 707                 target_pixel = drag_info.current_pointer_y - autoscroll_y_distance;
 708                 target_pixel = max (target_pixel, 0.0);
 709
 710         } else if (autoscroll_y > 0) {
 711
 712                 double top_of_bottom_of_canvas = full_canvas_height - canvas_height;
 713
 714                 if (vertical_pos > full_canvas_height - autoscroll_y_distance) {
 715                         new_pixel = full_canvas_height;
 716                 } else {
 717                         new_pixel = vertical_pos + autoscroll_y_distance;
 718                 }
 719
 720                 new_pixel = min (top_of_bottom_of_canvas, new_pixel);
 721
 722                 target_pixel = drag_info.current_pointer_y + autoscroll_y_distance;
 723
 724                 /* don't move to the full canvas height because the item will be invisible
 725                    (its top edge will line up with the bottom of the visible canvas.
 726                 */
 727
 728                 target_pixel = min (target_pixel, full_canvas_height - 10);
 729
 730         } else {
 731                 target_pixel = drag_info.current_pointer_y;
 732                 new_pixel = vertical_pos;
 733         }
 734
 735         if ((new_frame == 0 || new_frame == limit) && (new_pixel == 0 || new_pixel == DBL_MAX)) {
 736                 /* we are done */
 737                 return false;
 738         }
 739
 740         if (new_frame != leftmost_frame) {
 741                 reset_x_origin (new_frame);
 742         }
 743
 744         vertical_adjustment.set_value (new_pixel);
 745
 746         /* fake an event. */
 747
 748         Glib::RefPtr<Gdk::Window> canvas_window = const_cast<Editor*>(this)->track_canvas->get_window();
 749         gint x, y;
 750         Gdk::ModifierType mask;
 751         canvas_window->get_pointer (x, y, mask);
 752         ev.type = GDK_MOTION_NOTIFY;
 753         ev.state &= Gdk::BUTTON1_MASK;
 754         ev.x = x;
 755         ev.y = y;
 756
 757         motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
 758
 759         autoscroll_cnt++;
 760
 761         if (autoscroll_cnt == 1) {
 762
 763                 /* connect the timeout so that we get called repeatedly */
 764
 765                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 766                 return false;
 767
 768         }
 769
 770         return true;
 771 }
 772
 773 void
 774 Editor::start_canvas_autoscroll (int dx, int dy)
 775 {
 776         if (!session || autoscroll_active) {
 777                 return;
 778         }
 779
 780         stop_canvas_autoscroll ();
 781
 782         autoscroll_active = true;
 783         autoscroll_x = dx;
 784         autoscroll_y = dy;
 785         autoscroll_x_distance = (nframes64_t) floor (current_page_frames()/50.0);
 786         autoscroll_y_distance = fabs (dy * 5); /* pixels */
 787         autoscroll_cnt = 0;
 788
 789         /* do it right now, which will start the repeated callbacks */
 790
 791         autoscroll_canvas ();
 792 }
 793
 794 void
 795 Editor::stop_canvas_autoscroll ()
 796 {
 797
 798         if (autoscroll_timeout_tag >= 0) {
 799                 g_source_remove (autoscroll_timeout_tag);
 800                 autoscroll_timeout_tag = -1;
 801         }
 802
 803         autoscroll_active = false;
 804 }
 805
 806 bool
 807 Editor::left_track_canvas (GdkEventCrossing *ev)
 808 {
 809         set_entered_track (0);
 810         set_entered_regionview (0);
 811         reset_canvas_action_sensitivity (false);
 812         return false;
 813 }
 814
 815 bool
 816 Editor::entered_track_canvas (GdkEventCrossing *ev)
 817 {
 818         reset_canvas_action_sensitivity (true);
 819         return FALSE;
 820 }
 821
 822 void
 823 Editor::tie_vertical_scrolling ()
 824 {
 825         scroll_canvas_vertically ();
 826
 827         /* this will do an immediate redraw */
 828
 829         controls_layout.get_vadjustment()->set_value (vertical_adjustment.get_value());
 830 }
 831
 832 void
 833 Editor::scroll_canvas_horizontally ()
 834 {
 835         nframes64_t time_origin = (nframes64_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 836
 837         /* horizontal scrolling only */
 838         double x_delta;
 839
 840         x_delta = (leftmost_frame - time_origin) / frames_per_unit;
 841
 842         _master_group->move (x_delta, 0);
 843         timebar_group->move (x_delta, 0);
 844         time_line_group->move (x_delta, 0);
 845         cursor_group->move (x_delta, 0);
 846
 847         leftmost_frame = time_origin;
 848
 849         update_fixed_rulers ();
 850         redisplay_tempo (true);
 851
 852 #ifndef GTKOSX
 853         if (!autoscroll_active) {
 854                 /* force rulers and canvas to move in lock step */
 855                 while (gtk_events_pending ()) {
 856                         gtk_main_iteration ();
 857                 }
 858         }
 859 #endif
 860
 861 }
 862
 863 void
 864 Editor::scroll_canvas_vertically ()
 865 {
 866         /* vertical scrolling only */
 867
 868         double y_delta;
 869
 870         y_delta = last_trackview_group_vertical_offset - get_trackview_group_vertical_offset ();
 871         _trackview_group->move (0, y_delta);
 872         _background_group->move (0, y_delta);
 873
 874         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 875                 (*i)->clip_to_viewport ();
 876         }
 877         last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 878         /* required to keep the controls_layout in lock step with the canvas group */
 879         track_canvas->update_now ();
 880 }
 881
 882 void
 883 Editor::color_handler()
 884 {
 885         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 886         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 887
 888         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 889         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 890
 891         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 892         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 893
 894         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 895         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 896
 897         cd_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CDMarkerBar.get();
 898         cd_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 899
 900         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 901         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 902
 903         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 904         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 905
 906         cd_marker_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 907         cd_marker_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 908
 909         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 910         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 911
 912         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 913         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 914
 915         marker_drag_line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
 916
 917         range_marker_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 918         range_marker_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
 919
 920         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 921         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 922
 923         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 924         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 925
 926         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 927         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 928
 929         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 930         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 931
 932         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 933         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 934
 935         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 936         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 937         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 938         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 939         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 940
 941         refresh_location_display ();
 942 /*
 943         redisplay_tempo (true);
 944
 945         if (session)
 946                 session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 947 */
 948 }
 949
 950 void
 951 Editor::flush_canvas ()
 952 {
 953         if (is_mapped()) {
 954                 track_canvas->update_now ();
 955                 // gdk_window_process_updates (GTK_LAYOUT(track_canvas->gobj())->bin_window, true);
 956         }
 957 }
 958