2 Copyright (C) 2005 Paul Davis
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.
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.
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.
20 #include <libgnomecanvasmm/init.h>
21 #include <jack/types.h>
22 #include <gtkmm2ext/utils.h>
24 #include <ardour/audioregion.h>
26 #include "ardour_ui.h"
29 #include "simplerect.h"
30 #include "simpleline.h"
31 #include "waveview_p.h"
32 #include "simplerect_p.h"
33 #include "simpleline_p.h"
34 #include "canvas_impl.h"
36 #include "rgb_macros.h"
38 #include "time_axis_view.h"
39 #include "audio_time_axis.h"
42 #include "imageframe.h"
43 #include "imageframe_p.h"
50 using namespace ARDOUR;
54 using namespace Gtkmm2ext;
55 using namespace Editing;
57 /* XXX this is a hack. it ought to be the maximum value of an nframes_t */
59 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
64 GType gnome_canvas_simpleline_get_type(void);
65 GType gnome_canvas_simplerect_get_type(void);
66 GType gnome_canvas_waveview_get_type(void);
69 GType gnome_canvas_imageframe_get_type(void);
74 static void ardour_canvas_type_init()
76 // Map gtypes to gtkmm wrapper-creation functions:
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);
83 Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
86 // Register the gtkmm gtypes:
88 (void) Gnome::Canvas::WaveView::get_type();
89 (void) Gnome::Canvas::SimpleLine::get_type();
90 (void) Gnome::Canvas::SimpleRect::get_type();
93 (void) Gnome::Canvas::ImageFrame::get_type();
98 Editor::initialize_canvas ()
100 ArdourCanvas::init ();
101 ardour_canvas_type_init ();
103 /* don't try to center the canvas */
105 track_canvas.set_center_scroll_region (false);
106 track_canvas.set_dither (Gdk::RGB_DITHER_NONE);
108 /* need to handle 4 specific types of events as catch-alls */
110 track_canvas.signal_scroll_event().connect (mem_fun (*this, &Editor::track_canvas_scroll_event));
111 track_canvas.signal_motion_notify_event().connect (mem_fun (*this, &Editor::track_canvas_motion_notify_event));
112 track_canvas.signal_button_press_event().connect (mem_fun (*this, &Editor::track_canvas_button_press_event));
113 track_canvas.signal_button_release_event().connect (mem_fun (*this, &Editor::track_canvas_button_release_event));
115 track_canvas.set_name ("EditorMainCanvas");
116 track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
117 track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
118 track_canvas.set_flags (CAN_FOCUS);
120 /* set up drag-n-drop */
122 vector<TargetEntry> target_table;
124 // Drag-N-Drop from the region list can generate this target
125 target_table.push_back (TargetEntry ("regions"));
127 target_table.push_back (TargetEntry ("text/plain"));
128 target_table.push_back (TargetEntry ("text/uri-list"));
129 target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
131 track_canvas.drag_dest_set (target_table);
132 track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
134 /* stuff for the verbose canvas cursor */
136 Pango::FontDescription font = get_font_for_style (N_("VerboseCanvasCursor"));
138 verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
139 verbose_canvas_cursor->property_font_desc() = font;
140 verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
141 verbose_canvas_cursor->property_fill_color_rgba() = color_map[cVerboseCanvasCursor];
143 verbose_cursor_visible = false;
145 /* a group to hold time (measure) lines */
147 time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
148 cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
150 time_canvas.set_name ("EditorTimeCanvas");
151 time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
152 time_canvas.set_flags (CAN_FOCUS);
153 time_canvas.set_center_scroll_region (false);
154 time_canvas.set_dither (Gdk::RGB_DITHER_NONE);
156 meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
157 tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
158 marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
159 range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
160 transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
162 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
163 tempo_bar->property_fill_color_rgba() = color_map[cTempoBar];
164 tempo_bar->property_outline_what() = (0x1 | 0x8);
165 tempo_bar->property_outline_pixels() = 1;
166 tempo_bar->property_outline_color_rgba() = color_map[cTempoSeparator];
168 meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
169 meter_bar->property_fill_color_rgba() = color_map[cMeterBar];
170 meter_bar->property_outline_what() = (0x1 | 0x8);
171 meter_bar->property_outline_pixels() = 1;
172 meter_bar->property_outline_color_rgba() = color_map[cMeterSeparator];
174 marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
175 marker_bar->property_fill_color_rgba() = color_map[cMarkerBar];
176 marker_bar->property_outline_what() = (0x1 | 0x8);
177 marker_bar->property_outline_pixels() = 1;
178 marker_bar->property_outline_color_rgba() = color_map[cMarkerSeparator];
180 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
181 range_marker_bar->property_fill_color_rgba() = color_map[cRangeMarkerBar];
182 range_marker_bar->property_outline_what() = (0x1 | 0x8);
183 range_marker_bar->property_outline_pixels() = 1;
184 range_marker_bar->property_outline_color_rgba() = color_map[cRangeMarkerSeparator];
186 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
187 transport_marker_bar->property_fill_color_rgba() = color_map[cTransportMarkerBar];
188 transport_marker_bar->property_outline_what() = (0x1 | 0x8);
189 transport_marker_bar->property_outline_pixels() = 1;
190 transport_marker_bar->property_outline_color_rgba() = color_map[cTransportMarkerSeparator];
192 range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
193 range_bar_drag_rect->property_fill_color_rgba() = color_map[cRangeDragBarRectFill];
194 range_bar_drag_rect->property_outline_color_rgba() = color_map[cRangeDragBarRect];
195 range_bar_drag_rect->property_outline_pixels() = 0;
196 range_bar_drag_rect->hide ();
198 transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
199 transport_bar_drag_rect ->property_fill_color_rgba() = color_map[cTransportDragRectFill];
200 transport_bar_drag_rect->property_outline_color_rgba() = color_map[cTransportDragRect];
201 transport_bar_drag_rect->property_outline_pixels() = 0;
202 transport_bar_drag_rect->hide ();
204 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
205 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
207 marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
208 marker_drag_line->property_width_pixels() = 1;
209 marker_drag_line->property_fill_color_rgba() = color_map[cMarkerDragLine];
210 marker_drag_line->property_points() = marker_drag_line_points;
211 marker_drag_line->hide();
213 range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
214 range_marker_drag_rect->property_fill_color_rgba() = color_map[cRangeDragRectFill];
215 range_marker_drag_rect->property_outline_color_rgba() = color_map[cRangeDragRect];
216 range_marker_drag_rect->hide ();
218 transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
219 transport_loop_range_rect->property_fill_color_rgba() = color_map[cTransportLoopRectFill];
220 transport_loop_range_rect->property_outline_color_rgba() = color_map[cTransportLoopRect];
221 transport_loop_range_rect->property_outline_pixels() = 1;
222 transport_loop_range_rect->hide();
224 transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
225 transport_punch_range_rect->property_fill_color_rgba() = color_map[cTransportPunchRectFill];
226 transport_punch_range_rect->property_outline_color_rgba() = color_map[cTransportPunchRect];
227 transport_punch_range_rect->property_outline_pixels() = 0;
228 transport_punch_range_rect->hide();
230 transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
232 transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
233 transport_punchin_line->property_x1() = 0.0;
234 transport_punchin_line->property_y1() = 0.0;
235 transport_punchin_line->property_x2() = 0.0;
236 transport_punchin_line->property_y2() = 0.0;
237 transport_punchin_line->property_color_rgba() = color_map[cPunchInLine];
238 transport_punchin_line->hide ();
240 transport_punchout_line = new ArdourCanvas::SimpleLine (*time_line_group);
241 transport_punchout_line->property_x1() = 0.0;
242 transport_punchout_line->property_y1() = 0.0;
243 transport_punchout_line->property_x2() = 0.0;
244 transport_punchout_line->property_y2() = 0.0;
245 transport_punchout_line->property_color_rgba() = color_map[cPunchOutLine];
246 transport_punchout_line->hide();
248 // used to show zoom mode active zooming
249 zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
250 zoom_rect->property_fill_color_rgba() = color_map[cZoomRectFill];
251 zoom_rect->property_outline_color_rgba() = color_map[cZoomRect];
252 zoom_rect->property_outline_pixels() = 1;
255 zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
257 // used as rubberband rect
258 rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
259 rubberband_rect->property_outline_color_rgba() = color_map[cRubberBandRect];
260 rubberband_rect->property_fill_color_rgba() = (guint32) color_map[cRubberBandRectFill];
261 rubberband_rect->property_outline_pixels() = 1;
262 rubberband_rect->hide();
264 tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
265 meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
266 marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
267 range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
268 transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
270 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
271 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
273 double time_height = timebar_height * 5;
274 double time_width = FLT_MAX/frames_per_unit;
275 time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
277 if (!color_map[cEditCursor]) {
278 warning << _("edit cursor color not defined, check your ardour.colors file!") << endmsg;
279 color_map[cEditCursor] = RGBA_TO_UINT (30,30,30,255);
282 if (!color_map[cPlayHead]) {
283 warning << _("playhead color not defined, check your ardour.colors file!") << endmsg;
284 color_map[cPlayHead] = RGBA_TO_UINT (0,0,0,255);
287 edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
288 edit_cursor->canvas_item.property_fill_color_rgba() = color_map[cEditCursor];
289 playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
290 playhead_cursor->canvas_item.property_fill_color_rgba() = color_map[cPlayHead];
292 initial_ruler_update_required = true;
293 track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
298 Editor::track_canvas_allocate (Gtk::Allocation alloc)
300 canvas_allocation = alloc;
302 if (!initial_ruler_update_required) {
303 if (!canvas_idle_queued) {
304 /* call this first so that we do stuff before any pending redraw */
305 Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
306 canvas_idle_queued = true;
311 initial_ruler_update_required = false;
313 track_canvas_size_allocated ();
317 Editor::track_canvas_size_allocated ()
319 if (canvas_idle_queued) {
320 canvas_idle_queued = false;
323 canvas_width = canvas_allocation.get_width();
324 canvas_height = canvas_allocation.get_height();
326 full_canvas_height = canvas_height;
329 TrackViewList::iterator i;
332 for (i = track_views.begin(); i != track_views.end(); ++i) {
333 if ((*i)->control_parent) {
334 height += (*i)->effective_height;
338 full_canvas_height = height;
341 zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
342 edit_cursor->set_position (edit_cursor->current_frame);
343 playhead_cursor->set_position (playhead_cursor->current_frame);
345 reset_hscrollbar_stepping ();
346 reset_scrolling_region ();
348 if (edit_cursor) edit_cursor->set_length (canvas_height);
349 if (playhead_cursor) playhead_cursor->set_length (canvas_height);
351 if (marker_drag_line) {
352 marker_drag_line_points.back().set_y(canvas_height);
353 marker_drag_line->property_points() = marker_drag_line_points;
356 if (range_marker_drag_rect) {
357 range_marker_drag_rect->property_y1() = 0.0;
358 range_marker_drag_rect->property_y2() = canvas_height;
361 if (transport_loop_range_rect) {
362 transport_loop_range_rect->property_y1() = 0.0;
363 transport_loop_range_rect->property_y2() = canvas_height;
366 if (transport_punch_range_rect) {
367 transport_punch_range_rect->property_y1() = 0.0;
368 transport_punch_range_rect->property_y2() = canvas_height;
371 if (transport_punchin_line) {
372 transport_punchin_line->property_y1() = 0.0;
373 transport_punchin_line->property_y2() = canvas_height;
376 if (transport_punchout_line) {
377 transport_punchout_line->property_y1() = 0.0;
378 transport_punchout_line->property_y2() = canvas_height;
381 update_fixed_rulers();
382 redisplay_tempo (true);
384 Resized (); /* EMIT_SIGNAL */
390 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
392 TreeModel::Children rows = route_display_model->children();
393 TreeModel::Children::iterator i;
396 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
397 TimeAxisView *tv = (*i)[route_display_columns.tv];
398 if (tv != 0 && !tv->hidden()) {
399 pos += tv->effective_height;
403 double last_canvas_unit = last_canvas_frame / frames_per_unit;
405 track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
407 // XXX what is the correct height value for the time canvas ? this overstates it
408 time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
410 controls_layout.queue_resize();
414 Editor::controls_layout_size_request (Requisition* req)
416 TreeModel::Children rows = route_display_model->children();
417 TreeModel::Children::iterator i;
420 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
421 TimeAxisView *tv = (*i)[route_display_columns.tv];
423 pos += tv->effective_height;
427 RefPtr<Gdk::Screen> screen = get_screen();
430 screen = Gdk::Screen::get_default();
433 /* never let the width of the controls area shrink horizontally */
435 edit_controls_vbox.check_resize();
437 req->width = max (edit_controls_vbox.get_width(), controls_layout.get_width());
439 /* don't get too big. the fudge factors here are just guesses */
441 req->width = min (req->width, screen->get_width() - 300);
442 req->height = min ((gint) pos, (screen->get_height() - 400));
444 /* this one is important: it determines how big the layout thinks it really is, as
445 opposed to what it displays on the screen
448 controls_layout.set_size (req->width, (gint) pos);
452 Editor::track_canvas_map_handler (GdkEventAny* ev)
454 track_canvas.get_window()->set_cursor (*current_canvas_cursor);
459 Editor::time_canvas_map_handler (GdkEventAny* ev)
461 time_canvas.get_window()->set_cursor (*timebar_cursor);
466 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
468 const SelectionData& data,
469 guint info, guint time)
471 if (data.get_target() == "regions") {
472 drop_regions (context, x, y, data, info, time);
474 drop_paths (context, x, y, data, info, time);
479 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
481 const SelectionData& data,
482 guint info, guint time)
485 RouteTimeAxisView* tv;
487 vector<ustring> paths;
492 if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
496 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
502 track_canvas.window_to_world (x, y, wx, wy);
503 wx += horizontal_adjustment.get_value();
504 wy += vertical_adjustment.get_value();
506 ev.type = GDK_BUTTON_RELEASE;
510 frame = event_frame (&ev, 0, &cy);
514 if ((tvp = trackview_by_y_position (cy)) == 0) {
516 /* drop onto canvas background: create new tracks */
519 do_embed (paths, false, ImportAsTrack, 0, pos, false);
521 } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
523 /* check that its an audio track, not a bus */
525 if (tv->get_diskstream()) {
526 do_embed (paths, false, ImportToTrack, tv->audio_track().get(), frame, true);
531 context->drag_finish (true, false, time);
535 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
537 const SelectionData& data,
538 guint info, guint time)
540 const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
541 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
543 for (uint32_t i = 0; i < sr->cnt; ++i) {
545 boost::shared_ptr<Region> r = sr->data[i];
547 insert_region_list_drag (r, x, y);
550 context->drag_finish (true, false, time);
554 Editor::maybe_autoscroll (GdkEvent* event)
556 nframes_t rightmost_frame = leftmost_frame + current_page_frames();
557 nframes_t frame = drag_info.current_pointer_frame;
558 bool startit = false;
560 static int last_autoscroll_direction = 0;
562 if (frame > rightmost_frame) {
564 if (rightmost_frame < max_frames) {
565 autoscroll_direction = 1;
569 } else if (frame < leftmost_frame) {
571 if (leftmost_frame > 0) {
572 autoscroll_direction = -1;
578 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
579 autoscroll_direction = -1;
581 autoscroll_direction = 1;
586 if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
587 stop_canvas_autoscroll ();
590 if (startit && autoscroll_timeout_tag < 0) {
591 start_canvas_autoscroll (autoscroll_direction);
594 last_autoscroll_direction = autoscroll_direction;
598 Editor::_autoscroll_canvas (void *arg)
600 return ((Editor *) arg)->autoscroll_canvas ();
604 Editor::autoscroll_canvas ()
607 nframes_t limit = max_frames - current_page_frames();
609 nframes_t target_frame;
611 if (autoscroll_direction < 0) {
612 if (leftmost_frame < autoscroll_distance) {
615 new_frame = leftmost_frame - autoscroll_distance;
617 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
619 if (leftmost_frame > limit - autoscroll_distance) {
622 new_frame = leftmost_frame + autoscroll_distance;
624 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
627 /* now fake a motion event to get the object that is being dragged to move too */
629 ev.type = GDK_MOTION_NOTIFY;
630 ev.state &= Gdk::BUTTON1_MASK;
631 ev.x = frame_to_unit (target_frame);
632 ev.y = drag_info.current_pointer_y;
633 motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
635 if (new_frame == 0 || new_frame == limit) {
642 if (autoscroll_cnt == 1) {
644 /* connect the timeout so that we get called repeatedly */
646 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
651 if (new_frame != leftmost_frame) {
652 reset_x_origin (new_frame);
655 if (autoscroll_cnt == 50) { /* 0.5 seconds */
657 /* after about a while, speed up a bit by changing the timeout interval */
659 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
661 } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
663 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
665 } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
667 /* after about another while, speed up by increasing the shift per callback */
669 autoscroll_distance = (nframes_t) floor (current_page_frames()/10.0f);
677 Editor::start_canvas_autoscroll (int dir)
679 if (!session || autoscroll_active) {
683 stop_canvas_autoscroll ();
685 autoscroll_active = true;
686 autoscroll_direction = dir;
687 autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
690 /* do it right now, which will start the repeated callbacks */
692 autoscroll_canvas ();
696 Editor::stop_canvas_autoscroll ()
698 if (autoscroll_timeout_tag >= 0) {
699 g_source_remove (autoscroll_timeout_tag);
700 autoscroll_timeout_tag = -1;
703 autoscroll_active = false;
707 Editor::left_track_canvas (GdkEventCrossing *ev)
709 set_entered_track (0);
710 set_entered_regionview (0);
716 Editor::canvas_horizontally_scrolled ()
718 /* this is the core function that controls horizontal scrolling of the canvas. it is called
719 whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
720 idle handler, which is important because tempo_map_changed() should issue redraws immediately
721 and not defer them to an idle handler.
724 leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
725 nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
727 if (rightmost_frame > last_canvas_frame) {
728 last_canvas_frame = rightmost_frame;
729 reset_scrolling_region ();
732 update_fixed_rulers ();
734 redisplay_tempo (!_dragging_hscrollbar);