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