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/profile.h"
  26 #include "ardour/rc_configuration.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 "canvas-noevent-text.h"
  40 #include "editing.h"
  41 #include "rgb_macros.h"
  42 #include "utils.h"
  43 #include "audio_time_axis.h"
  44 #include "editor_drag.h"
  45 #include "region_view.h"
  46 #include "editor_group_tabs.h"
  47 #include "editor_routes.h"
  48 #include "editor_summary.h"
  49
  50 #include "i18n.h"
  51
  52 using namespace std;
  53 using namespace ARDOUR;
  54 using namespace PBD;
  55 using namespace Gtk;
  56 using namespace Glib;
  57 using namespace Gtkmm2ext;
  58 using namespace Editing;
  59
  60 /* XXX this is a hack. it ought to be the maximum value of an nframes64_t */
  61
  62 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
  63
  64 extern "C"
  65 {
  66
  67 GType gnome_canvas_simpleline_get_type(void);
  68 GType gnome_canvas_simplerect_get_type(void);
  69 GType gnome_canvas_waveview_get_type(void);
  70 GType gnome_canvas_imageframe_get_type(void);
  71
  72 }
  73
  74 static void ardour_canvas_type_init()
  75 {
  76         // Map gtypes to gtkmm wrapper-creation functions:
  77
  78         Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
  79         Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
  80         Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
  81         // Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
  82
  83         // Register the gtkmm gtypes:
  84
  85         (void) Gnome::Canvas::WaveView::get_type();
  86         (void) Gnome::Canvas::SimpleLine::get_type();
  87         (void) Gnome::Canvas::SimpleRect::get_type();
  88         (void) Gnome::Canvas::ImageFrame::get_type();
  89 }
  90
  91 void
  92 Editor::initialize_canvas ()
  93 {
  94         if (getenv ("ARDOUR_NON_AA_CANVAS")) {
  95                 track_canvas = new ArdourCanvas::Canvas ();
  96         } else {
  97                 track_canvas = new ArdourCanvas::CanvasAA ();
  98         }
  99
 100         ArdourCanvas::init ();
 101         ardour_canvas_type_init ();
 102
 103         /* don't try to center the canvas */
 104
 105         track_canvas->set_center_scroll_region (false);
 106         track_canvas->set_dither (Gdk::RGB_DITHER_NONE);
 107
 108         Glib::RefPtr<Gdk::Screen> screen = get_screen();
 109
 110         if (!screen) {
 111                 screen = Gdk::Screen::get_default();
 112         }
 113         physical_screen_width = screen->get_width ();
 114         physical_screen_height = screen->get_height ();
 115
 116         /* stuff for the verbose canvas cursor */
 117
 118         Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
 119
 120         verbose_canvas_cursor = new ArdourCanvas::NoEventText (*track_canvas->root());
 121         verbose_canvas_cursor->property_font_desc() = *font;
 122         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 123
 124         delete font;
 125
 126         verbose_cursor_visible = false;
 127
 128         /* on the bottom, an image */
 129
 130         if (Profile->get_sae()) {
 131                 Image img (::get_icon (X_("saelogo")));
 132                 logo_item = new ArdourCanvas::Pixbuf (*track_canvas->root(), 0.0, 0.0, img.get_pixbuf());
 133                 // logo_item->property_height_in_pixels() = true;
 134                 // logo_item->property_width_in_pixels() = true;
 135                 // logo_item->property_height_set() = true;
 136                 // logo_item->property_width_set() = true;
 137                 logo_item->show ();
 138         }
 139
 140         /* a group to hold time (measure) lines */
 141         time_line_group = new ArdourCanvas::Group (*track_canvas->root());
 142
 143 #ifdef GTKOSX
 144         /*XXX please don't laugh. this actually improves canvas performance on osx */
 145         bogus_background_rect =  new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, max_canvas_coordinate/3, physical_screen_height);
 146         bogus_background_rect->property_outline_pixels() = 0;
 147 #endif
 148         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, physical_screen_height);
 149         transport_loop_range_rect->property_outline_pixels() = 1;
 150         transport_loop_range_rect->hide();
 151
 152         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, physical_screen_height);
 153         transport_punch_range_rect->property_outline_pixels() = 0;
 154         transport_punch_range_rect->hide();
 155
 156         _background_group = new ArdourCanvas::Group (*track_canvas->root());
 157         _master_group = new ArdourCanvas::Group (*track_canvas->root());
 158
 159         _trackview_group = new ArdourCanvas::Group (*_master_group);
 160         _region_motion_group = new ArdourCanvas::Group (*_trackview_group);
 161
 162         meter_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 163         if (Profile->get_sae()) {
 164                 meter_bar = new ArdourCanvas::SimpleRect (*meter_bar_group, 0.0, 0.0, physical_screen_width, timebar_height - 1);
 165                 meter_bar->property_outline_pixels() = 1;
 166         } else {
 167                 meter_bar = new ArdourCanvas::SimpleRect (*meter_bar_group, 0.0, 0.0, physical_screen_width, timebar_height);
 168                 meter_bar->property_outline_pixels() = 0;
 169         }
 170         meter_bar->property_outline_what() = (0x1 | 0x8);
 171
 172         tempo_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 173         if (Profile->get_sae()) {
 174                 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 175                 tempo_bar->property_outline_pixels() = 1;
 176         } else {
 177                 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 178                 tempo_bar->property_outline_pixels() = 0;
 179         }
 180         tempo_bar->property_outline_what() = (0x1 | 0x8);
 181
 182         range_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 183         if (Profile->get_sae()) {
 184                 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 185                 range_marker_bar->property_outline_pixels() = 1;
 186         } else {
 187                 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 188                 range_marker_bar->property_outline_pixels() = 0;
 189         }
 190         range_marker_bar->property_outline_what() = (0x1 | 0x8);
 191
 192         transport_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 193         if (Profile->get_sae()) {
 194                 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_bar_group, 0.0, 0.0,  physical_screen_width, (timebar_height - 1));
 195                 transport_marker_bar->property_outline_pixels() = 1;
 196         } else {
 197                 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_bar_group, 0.0, 0.0,  physical_screen_width, (timebar_height));
 198                 transport_marker_bar->property_outline_pixels() = 0;
 199         }
 200         transport_marker_bar->property_outline_what() = (0x1 | 0x8);
 201
 202         marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 203         if (Profile->get_sae()) {
 204                 marker_bar = new ArdourCanvas::SimpleRect (*marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 205                 marker_bar->property_outline_pixels() = 1;
 206         } else {
 207                 marker_bar = new ArdourCanvas::SimpleRect (*marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 208                 marker_bar->property_outline_pixels() = 0;
 209         }
 210         marker_bar->property_outline_what() = (0x1 | 0x8);
 211
 212         cd_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 213         if (Profile->get_sae()) {
 214                 cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height - 1));
 215                 cd_marker_bar->property_outline_pixels() = 1;
 216         } else {
 217                 cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_bar_group, 0.0, 0.0, physical_screen_width, (timebar_height));
 218                 cd_marker_bar->property_outline_pixels() = 0;
 219         }
 220         cd_marker_bar->property_outline_what() = (0x1 | 0x8);
 221
 222         timebar_group =  new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 223         cursor_group = new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 224
 225         meter_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 5.0);
 226         tempo_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 4.0);
 227         range_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 3.0);
 228         transport_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 2.0);
 229         marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height);
 230         cd_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, 0.0);
 231
 232         cd_marker_bar_drag_rect = new ArdourCanvas::SimpleRect (*cd_marker_group, 0.0, 0.0, 100, timebar_height);
 233         cd_marker_bar_drag_rect->property_outline_pixels() = 0;
 234         cd_marker_bar_drag_rect->hide ();
 235
 236         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, 100, timebar_height);
 237         range_bar_drag_rect->property_outline_pixels() = 0;
 238         range_bar_drag_rect->hide ();
 239
 240         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, 100, timebar_height);
 241         transport_bar_drag_rect->property_outline_pixels() = 0;
 242         transport_bar_drag_rect->hide ();
 243
 244         transport_punchin_line = new ArdourCanvas::SimpleLine (*_master_group);
 245         transport_punchin_line->property_x1() = 0.0;
 246         transport_punchin_line->property_y1() = 0.0;
 247         transport_punchin_line->property_x2() = 0.0;
 248         transport_punchin_line->property_y2() = physical_screen_height;
 249         transport_punchin_line->hide ();
 250
 251         transport_punchout_line  = new ArdourCanvas::SimpleLine (*_master_group);
 252         transport_punchout_line->property_x1() = 0.0;
 253         transport_punchout_line->property_y1() = 0.0;
 254         transport_punchout_line->property_x2() = 0.0;
 255         transport_punchout_line->property_y2() = physical_screen_height;
 256         transport_punchout_line->hide();
 257
 258         // used to show zoom mode active zooming
 259         zoom_rect = new ArdourCanvas::SimpleRect (*_master_group, 0.0, 0.0, 0.0, 0.0);
 260         zoom_rect->property_outline_pixels() = 1;
 261         zoom_rect->hide();
 262
 263         zoom_rect->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 264
 265         // used as rubberband rect
 266         rubberband_rect = new ArdourCanvas::SimpleRect (*_trackview_group, 0.0, 0.0, 0.0, 0.0);
 267
 268         rubberband_rect->property_outline_pixels() = 1;
 269         rubberband_rect->hide();
 270
 271         tempo_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 272         meter_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 273         marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 274         cd_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_cd_marker_bar_event), cd_marker_bar));
 275         range_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 276         transport_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 277
 278         playhead_cursor = new EditorCursor (*this, &Editor::canvas_playhead_cursor_event);
 279
 280         if (logo_item) {
 281                 logo_item->lower_to_bottom ();
 282         }
 283         /* need to handle 4 specific types of events as catch-alls */
 284
 285         track_canvas->signal_scroll_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_scroll_event));
 286         track_canvas->signal_motion_notify_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_motion_notify_event));
 287         track_canvas->signal_button_press_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_button_press_event));
 288         track_canvas->signal_button_release_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_button_release_event));
 289         track_canvas->signal_drag_motion().connect (sigc::mem_fun (*this, &Editor::track_canvas_drag_motion));
 290
 291         track_canvas->set_name ("EditorMainCanvas");
 292         track_canvas->add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
 293         track_canvas->signal_leave_notify_event().connect (sigc::mem_fun(*this, &Editor::left_track_canvas));
 294         track_canvas->signal_enter_notify_event().connect (sigc::mem_fun(*this, &Editor::entered_track_canvas));
 295         track_canvas->set_flags (CAN_FOCUS);
 296
 297         /* set up drag-n-drop */
 298
 299         vector<TargetEntry> target_table;
 300
 301         // Drag-N-Drop from the region list can generate this target
 302         target_table.push_back (TargetEntry ("regions"));
 303
 304         target_table.push_back (TargetEntry ("text/plain"));
 305         target_table.push_back (TargetEntry ("text/uri-list"));
 306         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 307
 308         track_canvas->drag_dest_set (target_table);
 309         track_canvas->signal_drag_data_received().connect (sigc::mem_fun(*this, &Editor::track_canvas_drag_data_received));
 310
 311         track_canvas->signal_size_allocate().connect (sigc::mem_fun(*this, &Editor::track_canvas_allocate));
 312
 313         ColorsChanged.connect (sigc::mem_fun (*this, &Editor::color_handler));
 314         color_handler();
 315
 316 }
 317
 318 void
 319 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 320 {
 321         canvas_allocation = alloc;
 322         track_canvas_size_allocated ();
 323 }
 324
 325 bool
 326 Editor::track_canvas_size_allocated ()
 327 {
 328         bool height_changed = _canvas_height != canvas_allocation.get_height();
 329
 330         _canvas_width = canvas_allocation.get_width();
 331         _canvas_height = canvas_allocation.get_height();
 332
 333         if (_session) {
 334                 TrackViewList::iterator i;
 335                 double height = 0;
 336
 337                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 338                         height += (*i)->effective_height ();
 339                         (*i)->clip_to_viewport ();
 340                 }
 341
 342                 full_canvas_height = height + canvas_timebars_vsize;
 343         }
 344
 345         if (height_changed) {
 346                 if (playhead_cursor) {
 347                         playhead_cursor->set_length (_canvas_height);
 348                 }
 349
 350                 for (MarkerSelection::iterator x = selection->markers.begin(); x != selection->markers.end(); ++x) {
 351                         (*x)->set_line_vpos (0, _canvas_height);
 352                 }
 353
 354                 vertical_adjustment.set_page_size (_canvas_height);
 355                 last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 356                 if ((vertical_adjustment.get_value() + _canvas_height) >= vertical_adjustment.get_upper()) {
 357                         /*
 358                            We're increasing the size of the canvas while the bottom is visible.
 359                            We scroll down to keep in step with the controls layout.
 360                         */
 361                         vertical_adjustment.set_value (full_canvas_height - _canvas_height);
 362                 }
 363         }
 364
 365         update_fixed_rulers();
 366         redisplay_tempo (false);
 367         _summary->set_overlays_dirty ();
 368
 369         Resized (); /* EMIT_SIGNAL */
 370
 371         return false;
 372 }
 373
 374 void
 375 Editor::controls_layout_size_request (Requisition* req)
 376 {
 377         double pos = 0;
 378         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 379                 pos += (*i)->effective_height ();
 380                 (*i)->clip_to_viewport ();
 381         }
 382
 383         gint height = min ((gint) pos, (gint) (physical_screen_height - 600));
 384
 385         bool changed = false;
 386
 387         gint w = edit_controls_vbox.get_width();
 388         if (_group_tabs->is_mapped()) {
 389                 w += _group_tabs->get_width ();
 390         }
 391
 392         gint width = max (w, controls_layout.get_width());
 393
 394         /* don't get too big. the fudge factors here are just guesses */
 395
 396         width =  min (width, (gint) (physical_screen_width - 300));
 397
 398         if ((req->width != width) || (req->height != height)) {
 399                 changed = true;
 400                 controls_layout_size_request_connection.disconnect ();
 401         }
 402
 403         if (req->width != width) {
 404                 gint vbox_width = edit_controls_vbox.get_width();
 405                 if (_group_tabs->is_mapped()) {
 406                         vbox_width += _group_tabs->get_width();
 407                 }
 408                 req->width = width;
 409
 410                 /* this one is important: it determines how big the layout thinks it really is, as
 411                    opposed to what it displays on the screen
 412                 */
 413                 controls_layout.property_width () = vbox_width;
 414                 controls_layout.property_width_request () = vbox_width;
 415
 416                 // time_button_event_box.property_width_request () = vbox_width;
 417                 // zoom_box.property_width_request () = vbox_width;
 418         }
 419
 420         if (req->height != height) {
 421                 req->height = height;
 422                 controls_layout.property_height () = (guint) floor (pos);
 423                 controls_layout.property_height_request () = height;
 424         }
 425
 426         if (changed) {
 427                 controls_layout_size_request_connection = controls_layout.signal_size_request().connect (sigc::mem_fun (*this, &Editor::controls_layout_size_request));
 428         }
 429         //cerr << "sizes = " << req->width << " " << edit_controls_vbox.get_width() << " " << controls_layout.get_width() << " " << zoom_box.get_width() << " " << time_button_frame.get_width() << endl;//DEBUG
 430 }
 431
 432 bool
 433 Editor::track_canvas_map_handler (GdkEventAny* /*ev*/)
 434 {
 435         if (current_canvas_cursor) {
 436                 track_canvas->get_window()->set_cursor (*current_canvas_cursor);
 437         }
 438         return false;
 439 }
 440
 441 /** This is called when something is dropped onto the track canvas */
 442 void
 443 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 444                                          int x, int y,
 445                                          const SelectionData& data,
 446                                          guint info, guint time)
 447 {
 448         if (data.get_target() == "regions") {
 449                 drop_regions (context, x, y, data, info, time);
 450         } else {
 451                 drop_paths (context, x, y, data, info, time);
 452         }
 453 }
 454
 455 bool
 456 Editor::idle_drop_paths (vector<ustring> paths, nframes64_t frame, double ypos)
 457 {
 458         drop_paths_part_two (paths, frame, ypos);
 459         return false;
 460 }
 461
 462 void
 463 Editor::drop_paths_part_two (const vector<ustring>& paths, nframes64_t frame, double ypos)
 464 {
 465         RouteTimeAxisView* tv;
 466
 467         std::pair<TimeAxisView*, int> const tvp = trackview_by_y_position (ypos);
 468         if (tvp.first == 0) {
 469
 470                 /* drop onto canvas background: create new tracks */
 471
 472                 frame = 0;
 473
 474                 if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 475                         do_import (paths, Editing::ImportDistinctFiles, Editing::ImportAsTrack, SrcBest, frame);
 476                 } else {
 477                         do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 478                 }
 479
 480         } else if ((tv = dynamic_cast<RouteTimeAxisView*> (tvp.first)) != 0) {
 481
 482                 /* check that its an audio track, not a bus */
 483
 484                 if (tv->track()) {
 485                         /* select the track, then embed/import */
 486                         selection->set (tv);
 487
 488                         if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 489                                 do_import (paths, Editing::ImportSerializeFiles, Editing::ImportToTrack, SrcBest, frame);
 490                         } else {
 491                                 do_embed (paths, Editing::ImportSerializeFiles, ImportToTrack, frame);
 492                         }
 493                 }
 494         }
 495 }
 496
 497 void
 498 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 499                     int x, int y,
 500                     const SelectionData& data,
 501                     guint info, guint time)
 502 {
 503         vector<ustring> paths;
 504         GdkEvent ev;
 505         nframes64_t frame;
 506         double wx;
 507         double wy;
 508         double cy;
 509
 510         if (convert_drop_to_paths (paths, context, x, y, data, info, time) == 0) {
 511
 512                 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 513                  */
 514
 515                 track_canvas->window_to_world (x, y, wx, wy);
 516
 517                 ev.type = GDK_BUTTON_RELEASE;
 518                 ev.button.x = wx;
 519                 ev.button.y = wy;
 520
 521                 frame = event_frame (&ev, 0, &cy);
 522
 523                 snap_to (frame);
 524
 525 #ifdef GTKOSX
 526                 /* We are not allowed to call recursive main event loops from within
 527                    the main event loop with GTK/Quartz. Since import/embed wants
 528                    to push up a progress dialog, defer all this till we go idle.
 529                 */
 530                 Glib::signal_idle().connect (sigc::bind (sigc::mem_fun (*this, &Editor::idle_drop_paths), paths, frame, cy));
 531 #else
 532                 drop_paths_part_two (paths, frame, cy);
 533 #endif
 534         }
 535
 536         context->drag_finish (true, false, time);
 537 }
 538
 539 void
 540 Editor::drop_regions (const RefPtr<Gdk::DragContext>& /*context*/,
 541                       int /*x*/, int /*y*/,
 542                       const SelectionData& /*data*/,
 543                       guint /*info*/, guint /*time*/)
 544 {
 545         _drags->end_grab (0);
 546 }
 547
 548 void
 549 Editor::maybe_autoscroll (bool allow_horiz, bool allow_vert)
 550 {
 551         nframes64_t rightmost_frame = leftmost_frame + current_page_frames();
 552         bool startit = false;
 553
 554         double ty = _drags->current_pointer_y() - get_trackview_group_vertical_offset ();
 555
 556         autoscroll_y = 0;
 557         autoscroll_x = 0;
 558         if (ty < canvas_timebars_vsize && allow_vert) {
 559                 autoscroll_y = -1;
 560                 startit = true;
 561         } else if (ty > _canvas_height && allow_vert) {
 562                 autoscroll_y = 1;
 563                 startit = true;
 564         }
 565
 566         if (_drags->current_pointer_frame() > rightmost_frame && allow_horiz) {
 567                 if (rightmost_frame < max_frames) {
 568                         autoscroll_x = 1;
 569                         startit = true;
 570                 }
 571         } else if (_drags->current_pointer_frame() < leftmost_frame && allow_horiz) {
 572                 if (leftmost_frame > 0) {
 573                         autoscroll_x = -1;
 574                         startit = true;
 575                 }
 576         }
 577
 578         if ((autoscroll_x != last_autoscroll_x) || (autoscroll_y != last_autoscroll_y) || (autoscroll_x == 0 && autoscroll_y == 0)) {
 579                 stop_canvas_autoscroll ();
 580         }
 581
 582         if (startit && autoscroll_timeout_tag < 0) {
 583                 start_canvas_autoscroll (autoscroll_x, autoscroll_y);
 584         }
 585
 586         last_autoscroll_x = autoscroll_x;
 587         last_autoscroll_y = autoscroll_y;
 588 }
 589
 590 gint
 591 Editor::_autoscroll_canvas (void *arg)
 592 {
 593         return ((Editor *) arg)->autoscroll_canvas ();
 594 }
 595
 596 bool
 597 Editor::autoscroll_canvas ()
 598 {
 599         nframes64_t new_frame;
 600         nframes64_t limit = max_frames - current_page_frames();
 601         GdkEventMotion ev;
 602         double new_pixel;
 603         double target_pixel;
 604
 605         if (autoscroll_x_distance != 0) {
 606
 607                 if (autoscroll_x > 0) {
 608                         autoscroll_x_distance = (_drags->current_pointer_frame() - (leftmost_frame + current_page_frames())) / 3;
 609                 } else if (autoscroll_x < 0) {
 610                         autoscroll_x_distance = (leftmost_frame - _drags->current_pointer_frame()) / 3;
 611
 612                 }
 613         }
 614
 615         if (autoscroll_y_distance != 0) {
 616                 if (autoscroll_y > 0) {
 617                         autoscroll_y_distance = (_drags->current_pointer_y() - (get_trackview_group_vertical_offset() + _canvas_height)) / 3;
 618                 } else if (autoscroll_y < 0) {
 619
 620                         autoscroll_y_distance = (vertical_adjustment.get_value () - _drags->current_pointer_y()) / 3;
 621                 }
 622         }
 623
 624         if (autoscroll_x < 0) {
 625                 if (leftmost_frame < autoscroll_x_distance) {
 626                         new_frame = 0;
 627                 } else {
 628                         new_frame = leftmost_frame - autoscroll_x_distance;
 629                 }
 630         } else if (autoscroll_x > 0) {
 631                 if (leftmost_frame > limit - autoscroll_x_distance) {
 632                         new_frame = limit;
 633                 } else {
 634                         new_frame = leftmost_frame + autoscroll_x_distance;
 635                 }
 636         } else {
 637                 new_frame = leftmost_frame;
 638         }
 639
 640         double vertical_pos = vertical_adjustment.get_value();
 641
 642         if (autoscroll_y < 0) {
 643
 644                 if (vertical_pos < autoscroll_y_distance) {
 645                         new_pixel = 0;
 646                 } else {
 647                         new_pixel = vertical_pos - autoscroll_y_distance;
 648                 }
 649
 650                 target_pixel = _drags->current_pointer_y() - autoscroll_y_distance;
 651                 target_pixel = max (target_pixel, 0.0);
 652
 653         } else if (autoscroll_y > 0) {
 654
 655                 double top_of_bottom_of_canvas = full_canvas_height - _canvas_height;
 656
 657                 if (vertical_pos > full_canvas_height - autoscroll_y_distance) {
 658                         new_pixel = full_canvas_height;
 659                 } else {
 660                         new_pixel = vertical_pos + autoscroll_y_distance;
 661                 }
 662
 663                 new_pixel = min (top_of_bottom_of_canvas, new_pixel);
 664
 665                 target_pixel = _drags->current_pointer_y() + autoscroll_y_distance;
 666
 667                 /* don't move to the full canvas height because the item will be invisible
 668                    (its top edge will line up with the bottom of the visible canvas.
 669                 */
 670
 671                 target_pixel = min (target_pixel, full_canvas_height - 10);
 672
 673         } else {
 674                 target_pixel = _drags->current_pointer_y();
 675                 new_pixel = vertical_pos;
 676         }
 677
 678         if ((new_frame == 0 || new_frame == limit) && (new_pixel == 0 || new_pixel == DBL_MAX)) {
 679                 /* we are done */
 680                 return false;
 681         }
 682
 683         if (new_frame != leftmost_frame) {
 684                 reset_x_origin (new_frame);
 685         }
 686
 687         vertical_adjustment.set_value (new_pixel);
 688
 689         /* fake an event. */
 690
 691         Glib::RefPtr<Gdk::Window> canvas_window = const_cast<Editor*>(this)->track_canvas->get_window();
 692         gint x, y;
 693         Gdk::ModifierType mask;
 694         canvas_window->get_pointer (x, y, mask);
 695         ev.type = GDK_MOTION_NOTIFY;
 696         ev.state = Gdk::BUTTON1_MASK;
 697         ev.x = x;
 698         ev.y = y;
 699
 700         motion_handler (0, (GdkEvent*) &ev, true);
 701
 702         autoscroll_cnt++;
 703
 704         if (autoscroll_cnt == 1) {
 705
 706                 /* connect the timeout so that we get called repeatedly */
 707
 708                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 709                 return false;
 710
 711         }
 712
 713         return true;
 714 }
 715
 716 void
 717 Editor::start_canvas_autoscroll (int dx, int dy)
 718 {
 719         if (!_session || autoscroll_active) {
 720                 return;
 721         }
 722
 723         stop_canvas_autoscroll ();
 724
 725         autoscroll_active = true;
 726         autoscroll_x = dx;
 727         autoscroll_y = dy;
 728         autoscroll_x_distance = (nframes64_t) floor (current_page_frames()/50.0);
 729         autoscroll_y_distance = fabs (dy * 5); /* pixels */
 730         autoscroll_cnt = 0;
 731
 732         /* do it right now, which will start the repeated callbacks */
 733
 734         autoscroll_canvas ();
 735 }
 736
 737 void
 738 Editor::stop_canvas_autoscroll ()
 739 {
 740         if (autoscroll_timeout_tag >= 0) {
 741                 g_source_remove (autoscroll_timeout_tag);
 742                 autoscroll_timeout_tag = -1;
 743         }
 744
 745         autoscroll_active = false;
 746 }
 747
 748 bool
 749 Editor::left_track_canvas (GdkEventCrossing */*ev*/)
 750 {
 751         DropDownKeys ();
 752         set_entered_track (0);
 753         set_entered_regionview (0);
 754         reset_canvas_action_sensitivity (false);
 755         return false;
 756 }
 757
 758 bool
 759 Editor::entered_track_canvas (GdkEventCrossing */*ev*/)
 760 {
 761         reset_canvas_action_sensitivity (true);
 762         return FALSE;
 763 }
 764
 765 void
 766 Editor::tie_vertical_scrolling ()
 767 {
 768         scroll_canvas_vertically ();
 769
 770         /* this will do an immediate redraw */
 771
 772         controls_layout.get_vadjustment()->set_value (vertical_adjustment.get_value());
 773
 774         if (pending_visual_change.idle_handler_id < 0) {
 775                 _summary->set_overlays_dirty ();
 776         }
 777 }
 778
 779 void
 780 Editor::set_horizontal_position (double p)
 781 {
 782         /* horizontal scrolling only */
 783         double x1, y1, x2, y2, x_delta;
 784         _master_group->get_bounds (x1, y1, x2, y2);
 785
 786         x_delta = - (x1 + p);
 787
 788         _master_group->move (x_delta, 0);
 789         timebar_group->move (x_delta, 0);
 790         time_line_group->move (x_delta, 0);
 791         cursor_group->move (x_delta, 0);
 792
 793         leftmost_frame = (nframes64_t) floor (p * frames_per_unit);
 794
 795         update_fixed_rulers ();
 796         redisplay_tempo (true);
 797
 798         if (pending_visual_change.idle_handler_id < 0) {
 799                 _summary->set_overlays_dirty ();
 800         }
 801
 802 #ifndef GTKOSX
 803         if (!autoscroll_active && !_stationary_playhead) {
 804                 /* force rulers and canvas to move in lock step */
 805                 while (gtk_events_pending ()) {
 806                         gtk_main_iteration ();
 807                 }
 808         }
 809 #endif
 810
 811 }
 812
 813 void
 814 Editor::scroll_canvas_vertically ()
 815 {
 816         /* vertical scrolling only */
 817
 818         double y_delta;
 819
 820         y_delta = last_trackview_group_vertical_offset - get_trackview_group_vertical_offset ();
 821         _trackview_group->move (0, y_delta);
 822         _background_group->move (0, y_delta);
 823
 824         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 825                 (*i)->clip_to_viewport ();
 826         }
 827         last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 828         /* required to keep the controls_layout in lock step with the canvas group */
 829         update_canvas_now ();
 830 }
 831
 832 void
 833 Editor::color_handler()
 834 {
 835         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 836         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 837
 838         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 839         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 840
 841         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 842         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 843
 844         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 845         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 846
 847         cd_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CDMarkerBar.get();
 848         cd_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 849
 850         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 851         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 852
 853         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 854         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 855
 856         cd_marker_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 857         cd_marker_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 858
 859         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 860         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 861
 862         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 863         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 864
 865         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 866         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 867
 868         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 869         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 870
 871         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 872         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 873
 874         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 875         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 876
 877         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 878         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 879
 880         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 881         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 882         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 883         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 884         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 885
 886         refresh_location_display ();
 887 /*
 888         redisplay_tempo (true);
 889
 890         if (_session)
 891               _session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 892 */
 893 }
 894
 895 void
 896 Editor::flush_canvas ()
 897 {
 898         if (is_mapped()) {
 899                 update_canvas_now ();
 900                 // gdk_window_process_updates (GTK_LAYOUT(track_canvas->gobj())->bin_window, true);
 901         }
 902 }
 903
 904 void
 905 Editor::update_canvas_now ()
 906 {
 907         /* GnomeCanvas has a bug whereby if its idle handler is not scheduled between
 908            two calls to update_now, an assert will trip.  This wrapper works around
 909            that problem by only calling update_now if the assert will not trip.
 910
 911            I think the GC bug is due to the fact that its code will reset need_update
 912            and need_redraw to FALSE without checking to see if an idle handler is scheduled.
 913            If one is scheduled, GC should probably remove it.
 914         */
 915
 916         GnomeCanvas* c = track_canvas->gobj ();
 917         if (c->need_update || c->need_redraw) {
 918                 track_canvas->update_now ();
 919         }
 920 }
 921
 922 double
 923 Editor::horizontal_position () const
 924 {
 925         return frame_to_unit (leftmost_frame);
 926 }