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 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <libgnomecanvasmm/init.h>
  25 #include <libgnomecanvasmm/pixbuf.h>
  26 #include <jack/types.h>
  27 #include <gtkmm2ext/utils.h>
  28
  29 #include "ardour/profile.h"
  30 #include "ardour/rc_configuration.h"
  31
  32 #include "ardour_ui.h"
  33 #include "editor.h"
  34 #include "global_signals.h"
  35 #include "waveview.h"
  36 #include "simplerect.h"
  37 #include "simpleline.h"
  38 #include "imageframe.h"
  39 #include "waveview_p.h"
  40 #include "simplerect_p.h"
  41 #include "simpleline_p.h"
  42 #include "imageframe_p.h"
  43 #include "canvas_impl.h"
  44 #include "canvas-noevent-text.h"
  45 #include "editing.h"
  46 #include "rgb_macros.h"
  47 #include "utils.h"
  48 #include "audio_time_axis.h"
  49 #include "editor_drag.h"
  50 #include "region_view.h"
  51 #include "editor_group_tabs.h"
  52 #include "editor_routes.h"
  53 #include "editor_summary.h"
  54 #include "keyboard.h"
  55 #include "editor_cursors.h"
  56 #include "mouse_cursors.h"
  57
  58 #include "i18n.h"
  59
  60 using namespace std;
  61 using namespace ARDOUR;
  62 using namespace PBD;
  63 using namespace Gtk;
  64 using namespace Glib;
  65 using namespace Gtkmm2ext;
  66 using namespace Editing;
  67
  68 /* XXX this is a hack. it ought to be the maximum value of an framepos_t */
  69
  70 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
  71
  72 extern "C"
  73 {
  74
  75 GType gnome_canvas_simpleline_get_type(void);
  76 GType gnome_canvas_simplerect_get_type(void);
  77 GType gnome_canvas_waveview_get_type(void);
  78 GType gnome_canvas_imageframe_get_type(void);
  79
  80 }
  81
  82 static void ardour_canvas_type_init()
  83 {
  84         // Map gtypes to gtkmm wrapper-creation functions:
  85
  86         Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
  87         Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
  88         Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
  89         // Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
  90
  91         // Register the gtkmm gtypes:
  92
  93         (void) Gnome::Canvas::WaveView::get_type();
  94         (void) Gnome::Canvas::SimpleLine::get_type();
  95         (void) Gnome::Canvas::SimpleRect::get_type();
  96         (void) Gnome::Canvas::ImageFrame::get_type();
  97 }
  98
  99 void
 100 Editor::initialize_canvas ()
 101 {
 102         if (getenv ("ARDOUR_NON_AA_CANVAS")) {
 103                 track_canvas = new ArdourCanvas::Canvas ();
 104         } else {
 105                 track_canvas = new ArdourCanvas::CanvasAA ();
 106         }
 107
 108         ArdourCanvas::init ();
 109         ardour_canvas_type_init ();
 110
 111         /* don't try to center the canvas */
 112
 113         track_canvas->set_center_scroll_region (false);
 114         track_canvas->set_dither (Gdk::RGB_DITHER_NONE);
 115
 116         gint phys_width = physical_screen_width (Glib::RefPtr<Gdk::Window>());
 117         gint phys_height = physical_screen_height (Glib::RefPtr<Gdk::Window>());
 118
 119         /* stuff for the verbose canvas cursor */
 120
 121         Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
 122
 123         verbose_canvas_cursor = new ArdourCanvas::NoEventText (*track_canvas->root());
 124         verbose_canvas_cursor->property_font_desc() = *font;
 125         verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
 126
 127         delete font;
 128
 129         verbose_cursor_visible = false;
 130
 131         /* on the bottom, an image */
 132
 133         if (Profile->get_sae()) {
 134                 Image img (::get_icon (X_("saelogo")));
 135                 logo_item = new ArdourCanvas::Pixbuf (*track_canvas->root(), 0.0, 0.0, img.get_pixbuf());
 136                 // logo_item->property_height_in_pixels() = true;
 137                 // logo_item->property_width_in_pixels() = true;
 138                 // logo_item->property_height_set() = true;
 139                 // logo_item->property_width_set() = true;
 140                 logo_item->show ();
 141         }
 142
 143         /* a group to hold time (measure) lines */
 144         time_line_group = new ArdourCanvas::Group (*track_canvas->root());
 145
 146 #ifdef GTKOSX
 147         /*XXX please don't laugh. this actually improves canvas performance on osx */
 148         bogus_background_rect =  new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, max_canvas_coordinate/3, phys_height);
 149         bogus_background_rect->property_outline_pixels() = 0;
 150 #endif
 151         transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, phys_height);
 152         transport_loop_range_rect->property_outline_pixels() = 1;
 153         transport_loop_range_rect->hide();
 154
 155         transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, phys_height);
 156         transport_punch_range_rect->property_outline_pixels() = 0;
 157         transport_punch_range_rect->hide();
 158
 159         _background_group = new ArdourCanvas::Group (*track_canvas->root());
 160         _master_group = new ArdourCanvas::Group (*track_canvas->root());
 161
 162         _trackview_group = new ArdourCanvas::Group (*_master_group);
 163         _region_motion_group = new ArdourCanvas::Group (*_trackview_group);
 164
 165         meter_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 166         meter_bar = new ArdourCanvas::SimpleRect (*meter_bar_group, 0.0, 0.0, phys_width, timebar_height - 1);
 167         meter_bar->property_outline_pixels() = 1;
 168         meter_bar->property_outline_what() = 0x8;
 169
 170         tempo_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 171         tempo_bar = new ArdourCanvas::SimpleRect (*tempo_bar_group, 0.0, 0.0, phys_width, (timebar_height - 1));
 172         tempo_bar->property_outline_pixels() = 1;
 173         tempo_bar->property_outline_what() = 0x8;
 174
 175         range_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 176         range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_bar_group, 0.0, 0.0, phys_width, (timebar_height - 1));
 177         range_marker_bar->property_outline_pixels() = 1;
 178         range_marker_bar->property_outline_what() = 0x8;
 179
 180         transport_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 181         transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_bar_group, 0.0, 0.0,  phys_width, (timebar_height - 1));
 182         transport_marker_bar->property_outline_pixels() = 1;
 183         transport_marker_bar->property_outline_what() = 0x8;
 184
 185         marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 186         marker_bar = new ArdourCanvas::SimpleRect (*marker_bar_group, 0.0, 0.0, phys_width, (timebar_height - 1));
 187         marker_bar->property_outline_pixels() = 1;
 188         marker_bar->property_outline_what() = 0x8;
 189
 190         cd_marker_bar_group = new ArdourCanvas::Group (*track_canvas->root ());
 191         cd_marker_bar = new ArdourCanvas::SimpleRect (*cd_marker_bar_group, 0.0, 0.0, phys_width, (timebar_height - 1));
 192         cd_marker_bar->property_outline_pixels() = 1;
 193         cd_marker_bar->property_outline_what() = 0x8;
 194
 195         timebar_group =  new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 196         cursor_group = new ArdourCanvas::Group (*track_canvas->root(), 0.0, 0.0);
 197
 198         meter_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 5.0);
 199         tempo_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 4.0);
 200         range_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 3.0);
 201         transport_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height * 2.0);
 202         marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, timebar_height);
 203         cd_marker_group = new ArdourCanvas::Group (*timebar_group, 0.0, 0.0);
 204
 205         cd_marker_bar_drag_rect = new ArdourCanvas::SimpleRect (*cd_marker_group, 0.0, 0.0, 100, timebar_height);
 206         cd_marker_bar_drag_rect->property_outline_pixels() = 0;
 207         cd_marker_bar_drag_rect->hide ();
 208
 209         range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, 100, timebar_height);
 210         range_bar_drag_rect->property_outline_pixels() = 0;
 211         range_bar_drag_rect->hide ();
 212
 213         transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, 100, timebar_height);
 214         transport_bar_drag_rect->property_outline_pixels() = 0;
 215         transport_bar_drag_rect->hide ();
 216
 217         transport_punchin_line = new ArdourCanvas::SimpleLine (*_master_group);
 218         transport_punchin_line->property_x1() = 0.0;
 219         transport_punchin_line->property_y1() = 0.0;
 220         transport_punchin_line->property_x2() = 0.0;
 221         transport_punchin_line->property_y2() = phys_height;
 222         transport_punchin_line->hide ();
 223
 224         transport_punchout_line  = new ArdourCanvas::SimpleLine (*_master_group);
 225         transport_punchout_line->property_x1() = 0.0;
 226         transport_punchout_line->property_y1() = 0.0;
 227         transport_punchout_line->property_x2() = 0.0;
 228         transport_punchout_line->property_y2() = phys_height;
 229         transport_punchout_line->hide();
 230
 231         // used to show zoom mode active zooming
 232         zoom_rect = new ArdourCanvas::SimpleRect (*_master_group, 0.0, 0.0, 0.0, 0.0);
 233         zoom_rect->property_outline_pixels() = 1;
 234         zoom_rect->hide();
 235
 236         zoom_rect->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
 237
 238         // used as rubberband rect
 239         rubberband_rect = new ArdourCanvas::SimpleRect (*_trackview_group, 0.0, 0.0, 0.0, 0.0);
 240
 241         rubberband_rect->property_outline_pixels() = 1;
 242         rubberband_rect->hide();
 243
 244         tempo_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
 245         meter_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
 246         marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
 247         cd_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_cd_marker_bar_event), cd_marker_bar));
 248         range_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
 249         transport_marker_bar->signal_event().connect (sigc::bind (sigc::mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
 250
 251         playhead_cursor = new EditorCursor (*this, &Editor::canvas_playhead_cursor_event);
 252
 253         if (logo_item) {
 254                 logo_item->lower_to_bottom ();
 255         }
 256         /* need to handle 4 specific types of events as catch-alls */
 257
 258         track_canvas->signal_scroll_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_scroll_event));
 259         track_canvas->signal_motion_notify_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_motion_notify_event));
 260         track_canvas->signal_button_press_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_button_press_event));
 261         track_canvas->signal_button_release_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_button_release_event));
 262         track_canvas->signal_drag_motion().connect (sigc::mem_fun (*this, &Editor::track_canvas_drag_motion));
 263         track_canvas->signal_key_press_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_key_press));
 264         track_canvas->signal_key_release_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_key_release));
 265
 266         track_canvas->set_name ("EditorMainCanvas");
 267         track_canvas->add_events (Gdk::POINTER_MOTION_HINT_MASK | Gdk::SCROLL_MASK | Gdk::KEY_PRESS_MASK | Gdk::KEY_RELEASE_MASK);
 268         track_canvas->signal_leave_notify_event().connect (sigc::mem_fun(*this, &Editor::left_track_canvas));
 269         track_canvas->signal_enter_notify_event().connect (sigc::mem_fun(*this, &Editor::entered_track_canvas));
 270         track_canvas->set_flags (CAN_FOCUS);
 271
 272         /* set up drag-n-drop */
 273
 274         vector<TargetEntry> target_table;
 275
 276         // Drag-N-Drop from the region list can generate this target
 277         target_table.push_back (TargetEntry ("regions"));
 278
 279         target_table.push_back (TargetEntry ("text/plain"));
 280         target_table.push_back (TargetEntry ("text/uri-list"));
 281         target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
 282
 283         track_canvas->drag_dest_set (target_table);
 284         track_canvas->signal_drag_data_received().connect (sigc::mem_fun(*this, &Editor::track_canvas_drag_data_received));
 285
 286         track_canvas->signal_size_allocate().connect (sigc::mem_fun(*this, &Editor::track_canvas_allocate));
 287
 288         ColorsChanged.connect (sigc::mem_fun (*this, &Editor::color_handler));
 289         color_handler();
 290
 291 }
 292
 293 void
 294 Editor::track_canvas_allocate (Gtk::Allocation alloc)
 295 {
 296         canvas_allocation = alloc;
 297         track_canvas_size_allocated ();
 298 }
 299
 300 bool
 301 Editor::track_canvas_size_allocated ()
 302 {
 303         bool height_changed = _canvas_height != canvas_allocation.get_height();
 304
 305         _canvas_width = canvas_allocation.get_width();
 306         _canvas_height = canvas_allocation.get_height();
 307
 308         if (_session) {
 309                 TrackViewList::iterator i;
 310
 311                 for (i = track_views.begin(); i != track_views.end(); ++i) {
 312                         (*i)->clip_to_viewport ();
 313                 }
 314         }
 315
 316         if (height_changed) {
 317                 if (playhead_cursor) {
 318                         playhead_cursor->set_length (_canvas_height);
 319                 }
 320
 321                 for (LocationMarkerMap::iterator i = location_markers.begin(); i != location_markers.end(); ++i) {
 322                         i->second->canvas_height_set (_canvas_height);
 323                 }
 324
 325                 vertical_adjustment.set_page_size (_canvas_height);
 326                 last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 327                 if ((vertical_adjustment.get_value() + _canvas_height) >= vertical_adjustment.get_upper()) {
 328                         /*
 329                            We're increasing the size of the canvas while the bottom is visible.
 330                            We scroll down to keep in step with the controls layout.
 331                         */
 332                         vertical_adjustment.set_value (full_canvas_height - _canvas_height);
 333                 }
 334         }
 335
 336         update_fixed_rulers();
 337         redisplay_tempo (false);
 338         _summary->set_overlays_dirty ();
 339
 340         Resized (); /* EMIT_SIGNAL */
 341
 342         return false;
 343 }
 344
 345 void
 346 Editor::reset_controls_layout_width ()
 347 {
 348         gint w = edit_controls_vbox.get_width();
 349
 350         if (_group_tabs->is_mapped()) {
 351                 w += _group_tabs->get_width();
 352         }
 353
 354         /* the controls layout has no horizontal scrolling, its visible
 355            width is always equal to the total width of its contents.
 356         */
 357
 358         controls_layout.property_width() = w;
 359         controls_layout.property_width_request() = w;
 360 }
 361
 362 void
 363 Editor::reset_controls_layout_height (int32_t h)
 364 {
 365         /* set the height of the scrollable area (i.e. the sum of all contained widgets)
 366          */
 367
 368         controls_layout.property_height() = h;
 369
 370         /* size request is set elsewhere, see ::track_canvas_allocate() */
 371 }
 372
 373 bool
 374 Editor::track_canvas_map_handler (GdkEventAny* /*ev*/)
 375 {
 376         if (current_canvas_cursor) {
 377                 set_canvas_cursor (current_canvas_cursor);
 378         }
 379         return false;
 380 }
 381
 382 /** This is called when something is dropped onto the track canvas */
 383 void
 384 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 385                                          int x, int y,
 386                                          const SelectionData& data,
 387                                          guint info, guint time)
 388 {
 389         if (data.get_target() == "regions") {
 390                 drop_regions (context, x, y, data, info, time);
 391         } else {
 392                 drop_paths (context, x, y, data, info, time);
 393         }
 394 }
 395
 396 bool
 397 Editor::idle_drop_paths (vector<string> paths, framepos_t frame, double ypos)
 398 {
 399         drop_paths_part_two (paths, frame, ypos);
 400         return false;
 401 }
 402
 403 void
 404 Editor::drop_paths_part_two (const vector<string>& paths, framepos_t frame, double ypos)
 405 {
 406         RouteTimeAxisView* tv;
 407
 408         std::pair<TimeAxisView*, int> const tvp = trackview_by_y_position (ypos);
 409         if (tvp.first == 0) {
 410
 411                 /* drop onto canvas background: create new tracks */
 412
 413                 frame = 0;
 414
 415                 if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 416                         do_import (paths, Editing::ImportDistinctFiles, Editing::ImportAsTrack, SrcBest, frame);
 417                 } else {
 418                         do_embed (paths, Editing::ImportDistinctFiles, ImportAsTrack, frame);
 419                 }
 420
 421         } else if ((tv = dynamic_cast<RouteTimeAxisView*> (tvp.first)) != 0) {
 422
 423                 /* check that its an audio track, not a bus */
 424
 425                 if (tv->track()) {
 426                         /* select the track, then embed/import */
 427                         selection->set (tv);
 428
 429                         if (Profile->get_sae() || Config->get_only_copy_imported_files()) {
 430                                 do_import (paths, Editing::ImportSerializeFiles, Editing::ImportToTrack, SrcBest, frame);
 431                         } else {
 432                                 do_embed (paths, Editing::ImportSerializeFiles, ImportToTrack, frame);
 433                         }
 434                 }
 435         }
 436 }
 437
 438 void
 439 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
 440                     int x, int y,
 441                     const SelectionData& data,
 442                     guint info, guint time)
 443 {
 444         vector<string> paths;
 445         GdkEvent ev;
 446         framepos_t frame;
 447         double wx;
 448         double wy;
 449         double cy;
 450
 451         if (convert_drop_to_paths (paths, context, x, y, data, info, time) == 0) {
 452
 453                 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
 454                  */
 455
 456                 track_canvas->window_to_world (x, y, wx, wy);
 457
 458                 ev.type = GDK_BUTTON_RELEASE;
 459                 ev.button.x = wx;
 460                 ev.button.y = wy;
 461
 462                 frame = event_frame (&ev, 0, &cy);
 463
 464                 snap_to (frame);
 465
 466 #ifdef GTKOSX
 467                 /* We are not allowed to call recursive main event loops from within
 468                    the main event loop with GTK/Quartz. Since import/embed wants
 469                    to push up a progress dialog, defer all this till we go idle.
 470                 */
 471                 Glib::signal_idle().connect (sigc::bind (sigc::mem_fun (*this, &Editor::idle_drop_paths), paths, frame, cy));
 472 #else
 473                 drop_paths_part_two (paths, frame, cy);
 474 #endif
 475         }
 476
 477         context->drag_finish (true, false, time);
 478 }
 479
 480 void
 481 Editor::drop_regions (const RefPtr<Gdk::DragContext>& /*context*/,
 482                       int /*x*/, int /*y*/,
 483                       const SelectionData& /*data*/,
 484                       guint /*info*/, guint /*time*/)
 485 {
 486         _drags->end_grab (0);
 487 }
 488
 489 void
 490 Editor::maybe_autoscroll (bool allow_horiz, bool allow_vert)
 491 {
 492         framepos_t rightmost_frame = leftmost_frame + current_page_frames();
 493         bool startit = false;
 494
 495         double const ty = _drags->current_pointer_y() - get_trackview_group_vertical_offset ();
 496
 497         autoscroll_y = 0;
 498         autoscroll_x = 0;
 499         if (ty < canvas_timebars_vsize && allow_vert) {
 500                 autoscroll_y = -1;
 501                 startit = true;
 502         } else if (ty > _canvas_height && allow_vert) {
 503                 autoscroll_y = 1;
 504                 startit = true;
 505         }
 506
 507         if (_drags->current_pointer_frame() > rightmost_frame && allow_horiz) {
 508                 if (rightmost_frame < max_framepos) {
 509                         autoscroll_x = 1;
 510                         startit = true;
 511                 }
 512         } else if (_drags->current_pointer_frame() < leftmost_frame && allow_horiz) {
 513                 if (leftmost_frame > 0) {
 514                         autoscroll_x = -1;
 515                         startit = true;
 516                 }
 517         }
 518
 519         if (autoscroll_active && ((autoscroll_x != last_autoscroll_x) || (autoscroll_y != last_autoscroll_y) || (autoscroll_x == 0 && autoscroll_y == 0))) {
 520                 stop_canvas_autoscroll ();
 521         }
 522
 523         if (startit && autoscroll_timeout_tag < 0) {
 524                 start_canvas_autoscroll (autoscroll_x, autoscroll_y);
 525         }
 526
 527         last_autoscroll_x = autoscroll_x;
 528         last_autoscroll_y = autoscroll_y;
 529 }
 530
 531 gint
 532 Editor::_autoscroll_canvas (void *arg)
 533 {
 534         return ((Editor *) arg)->autoscroll_canvas ();
 535 }
 536
 537 bool
 538 Editor::autoscroll_canvas ()
 539 {
 540         framepos_t new_frame;
 541         framepos_t limit = max_framepos - current_page_frames();
 542         GdkEventMotion ev;
 543         double new_pixel;
 544         double target_pixel;
 545
 546         if (autoscroll_x_distance != 0) {
 547
 548                 if (autoscroll_x > 0) {
 549                         autoscroll_x_distance = (_drags->current_pointer_frame() - (leftmost_frame + current_page_frames())) / 3;
 550                 } else if (autoscroll_x < 0) {
 551                         autoscroll_x_distance = (leftmost_frame - _drags->current_pointer_frame()) / 3;
 552
 553                 }
 554         }
 555
 556         if (autoscroll_y_distance != 0) {
 557                 if (autoscroll_y > 0) {
 558                         autoscroll_y_distance = (_drags->current_pointer_y() - (get_trackview_group_vertical_offset() + _canvas_height)) / 3;
 559                 } else if (autoscroll_y < 0) {
 560
 561                         autoscroll_y_distance = (vertical_adjustment.get_value () - _drags->current_pointer_y()) / 3;
 562                 }
 563         }
 564
 565         if (autoscroll_x < 0) {
 566                 if (leftmost_frame < autoscroll_x_distance) {
 567                         new_frame = 0;
 568                 } else {
 569                         new_frame = leftmost_frame - autoscroll_x_distance;
 570                 }
 571         } else if (autoscroll_x > 0) {
 572                 if (leftmost_frame > limit - autoscroll_x_distance) {
 573                         new_frame = limit;
 574                 } else {
 575                         new_frame = leftmost_frame + autoscroll_x_distance;
 576                 }
 577         } else {
 578                 new_frame = leftmost_frame;
 579         }
 580
 581         double vertical_pos = vertical_adjustment.get_value();
 582
 583         if (autoscroll_y < 0) {
 584
 585                 if (vertical_pos < autoscroll_y_distance) {
 586                         new_pixel = 0;
 587                 } else {
 588                         new_pixel = vertical_pos - autoscroll_y_distance;
 589                 }
 590
 591                 target_pixel = _drags->current_pointer_y() - autoscroll_y_distance;
 592                 target_pixel = max (target_pixel, 0.0);
 593
 594         } else if (autoscroll_y > 0) {
 595
 596                 double top_of_bottom_of_canvas = full_canvas_height - _canvas_height;
 597
 598                 if (vertical_pos > full_canvas_height - autoscroll_y_distance) {
 599                         new_pixel = full_canvas_height;
 600                 } else {
 601                         new_pixel = vertical_pos + autoscroll_y_distance;
 602                 }
 603
 604                 new_pixel = min (top_of_bottom_of_canvas, new_pixel);
 605
 606                 target_pixel = _drags->current_pointer_y() + autoscroll_y_distance;
 607
 608                 /* don't move to the full canvas height because the item will be invisible
 609                    (its top edge will line up with the bottom of the visible canvas.
 610                 */
 611
 612                 target_pixel = min (target_pixel, full_canvas_height - 10);
 613
 614         } else {
 615                 target_pixel = _drags->current_pointer_y();
 616                 new_pixel = vertical_pos;
 617         }
 618
 619         if ((new_frame == 0 || new_frame == limit) && (new_pixel == 0 || new_pixel == DBL_MAX)) {
 620                 /* we are done */
 621                 return false;
 622         }
 623
 624         if (new_frame != leftmost_frame) {
 625                 reset_x_origin (new_frame);
 626         }
 627
 628         vertical_adjustment.set_value (new_pixel);
 629
 630         /* fake an event. */
 631
 632         Glib::RefPtr<Gdk::Window> canvas_window = const_cast<Editor*>(this)->track_canvas->get_window();
 633         gint x, y;
 634         Gdk::ModifierType mask;
 635         canvas_window->get_pointer (x, y, mask);
 636         ev.type = GDK_MOTION_NOTIFY;
 637         ev.state = Gdk::BUTTON1_MASK;
 638         ev.x = x;
 639         ev.y = y;
 640
 641         motion_handler (0, (GdkEvent*) &ev, true);
 642
 643         autoscroll_cnt++;
 644
 645         if (autoscroll_cnt == 1) {
 646
 647                 /* connect the timeout so that we get called repeatedly */
 648
 649                 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
 650                 return false;
 651
 652         }
 653
 654         return true;
 655 }
 656
 657 void
 658 Editor::start_canvas_autoscroll (int dx, int dy)
 659 {
 660         if (!_session || autoscroll_active) {
 661                 return;
 662         }
 663
 664         stop_canvas_autoscroll ();
 665
 666         autoscroll_active = true;
 667         autoscroll_x = dx;
 668         autoscroll_y = dy;
 669         autoscroll_x_distance = (framepos_t) floor (current_page_frames()/50.0);
 670         autoscroll_y_distance = fabs (dy * 5); /* pixels */
 671         autoscroll_cnt = 0;
 672
 673         /* do it right now, which will start the repeated callbacks */
 674
 675         autoscroll_canvas ();
 676 }
 677
 678 void
 679 Editor::stop_canvas_autoscroll ()
 680 {
 681         if (autoscroll_timeout_tag >= 0) {
 682                 g_source_remove (autoscroll_timeout_tag);
 683                 autoscroll_timeout_tag = -1;
 684         }
 685
 686         autoscroll_active = false;
 687 }
 688
 689 bool
 690 Editor::left_track_canvas (GdkEventCrossing */*ev*/)
 691 {
 692         DropDownKeys ();
 693         set_entered_track (0);
 694         set_entered_regionview (0);
 695         reset_canvas_action_sensitivity (false);
 696         return false;
 697 }
 698
 699 bool
 700 Editor::entered_track_canvas (GdkEventCrossing */*ev*/)
 701 {
 702         reset_canvas_action_sensitivity (true);
 703         return FALSE;
 704 }
 705
 706 void
 707 Editor::tie_vertical_scrolling ()
 708 {
 709         scroll_canvas_vertically ();
 710
 711         /* this will do an immediate redraw */
 712
 713         controls_layout.get_vadjustment()->set_value (vertical_adjustment.get_value());
 714
 715         if (pending_visual_change.idle_handler_id < 0) {
 716                 _summary->set_overlays_dirty ();
 717         }
 718 }
 719
 720 void
 721 Editor::set_horizontal_position (double p)
 722 {
 723         /* horizontal scrolling only */
 724         double x1, y1, x2, y2, x_delta;
 725         _master_group->get_bounds (x1, y1, x2, y2);
 726
 727         x_delta = - (x1 + p);
 728
 729         _master_group->move (x_delta, 0);
 730         timebar_group->move (x_delta, 0);
 731         time_line_group->move (x_delta, 0);
 732         cursor_group->move (x_delta, 0);
 733
 734         leftmost_frame = (framepos_t) floor (p * frames_per_unit);
 735
 736         update_fixed_rulers ();
 737         redisplay_tempo (true);
 738
 739         if (pending_visual_change.idle_handler_id < 0) {
 740                 _summary->set_overlays_dirty ();
 741         }
 742
 743         HorizontalPositionChanged (); /* EMIT SIGNAL */
 744
 745 #ifndef GTKOSX
 746         if (!autoscroll_active && !_stationary_playhead) {
 747                 /* force rulers and canvas to move in lock step */
 748                 while (gtk_events_pending ()) {
 749                         gtk_main_iteration ();
 750                 }
 751         }
 752 #endif
 753
 754 }
 755
 756 void
 757 Editor::scroll_canvas_vertically ()
 758 {
 759         /* vertical scrolling only */
 760
 761         double y_delta;
 762
 763         y_delta = last_trackview_group_vertical_offset - get_trackview_group_vertical_offset ();
 764         _trackview_group->move (0, y_delta);
 765         _background_group->move (0, y_delta);
 766
 767         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 768                 (*i)->clip_to_viewport ();
 769         }
 770         last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
 771         /* required to keep the controls_layout in lock step with the canvas group */
 772         update_canvas_now ();
 773 }
 774
 775 void
 776 Editor::color_handler()
 777 {
 778         playhead_cursor->canvas_item.property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_PlayHead.get();
 779         verbose_canvas_cursor->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VerboseCanvasCursor.get();
 780
 781         meter_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MeterBar.get();
 782         meter_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 783
 784         tempo_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TempoBar.get();
 785         tempo_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 786
 787         marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBar.get();
 788         marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 789
 790         cd_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CDMarkerBar.get();
 791         cd_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 792
 793         range_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeMarkerBar.get();
 794         range_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 795
 796         transport_marker_bar->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportMarkerBar.get();
 797         transport_marker_bar->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerBarSeparator.get();
 798
 799         cd_marker_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 800         cd_marker_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 801
 802         range_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 803         range_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragBarRect.get();
 804
 805         transport_bar_drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 806         transport_bar_drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportDragRect.get();
 807
 808         transport_loop_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 809         transport_loop_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportLoopRect.get();
 810
 811         transport_punch_range_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 812         transport_punch_range_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TransportPunchRect.get();
 813
 814         transport_punchin_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 815         transport_punchout_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_PunchLine.get();
 816
 817         zoom_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 818         zoom_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_ZoomRect.get();
 819
 820         rubberband_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 821         rubberband_rect->property_fill_color_rgba() = (guint32) ARDOUR_UI::config()->canvasvar_RubberBandRect.get();
 822
 823         location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
 824         location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
 825         location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
 826         location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
 827         location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 828
 829         refresh_location_display ();
 830 /*
 831         redisplay_tempo (true);
 832
 833         if (_session)
 834               _session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
 835 */
 836 }
 837
 838 void
 839 Editor::flush_canvas ()
 840 {
 841         if (is_mapped()) {
 842                 update_canvas_now ();
 843                 // gdk_window_process_updates (GTK_LAYOUT(track_canvas->gobj())->bin_window, true);
 844         }
 845 }
 846
 847 void
 848 Editor::update_canvas_now ()
 849 {
 850         /* GnomeCanvas has a bug whereby if its idle handler is not scheduled between
 851            two calls to update_now, an assert will trip.  This wrapper works around
 852            that problem by only calling update_now if the assert will not trip.
 853
 854            I think the GC bug is due to the fact that its code will reset need_update
 855            and need_redraw to FALSE without checking to see if an idle handler is scheduled.
 856            If one is scheduled, GC should probably remove it.
 857         */
 858
 859         GnomeCanvas* c = track_canvas->gobj ();
 860         if (c->need_update || c->need_redraw) {
 861                 track_canvas->update_now ();
 862         }
 863 }
 864
 865 double
 866 Editor::horizontal_position () const
 867 {
 868         return frame_to_unit (leftmost_frame);
 869 }
 870 void
 871 Editor::set_canvas_cursor (Gdk::Cursor* cursor, bool save)
 872 {
 873         if (save) {
 874                 current_canvas_cursor = cursor;
 875         }
 876
 877         if (is_drawable()) {
 878                 track_canvas->get_window()->set_cursor (*cursor);
 879         }
 880 }
 881
 882 bool
 883 Editor::track_canvas_key_press (GdkEventKey* event)
 884 {
 885         /* XXX: event does not report the modifier key pressed down, AFAICS, so use the Keyboard object instead */
 886         if (mouse_mode == Editing::MouseZoom && Keyboard::the_keyboard().key_is_down (GDK_Control_L)) {
 887                 set_canvas_cursor (_cursors->zoom_out, true);
 888         }
 889
 890         return false;
 891 }
 892
 893 bool
 894 Editor::track_canvas_key_release (GdkEventKey* event)
 895 {
 896         if (mouse_mode == Editing::MouseZoom && !Keyboard::the_keyboard().key_is_down (GDK_Control_L)) {
 897                 set_canvas_cursor (_cursors->zoom_in, true);
 898         }
 899
 900         return false;
 901 }