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 "imageframe.h"
32 #include "waveview_p.h"
33 #include "simplerect_p.h"
34 #include "simpleline_p.h"
35 #include "imageframe_p.h"
36 #include "canvas_impl.h"
38 #include "rgb_macros.h"
40 #include "time_axis_view.h"
41 #include "audio_time_axis.h"
47 using namespace ARDOUR;
51 using namespace Gtkmm2ext;
52 using namespace Editing;
54 /* XXX this is a hack. it ought to be the maximum value of an nframes_t */
56 const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
61 GType gnome_canvas_simpleline_get_type(void);
62 GType gnome_canvas_simplerect_get_type(void);
63 GType gnome_canvas_waveview_get_type(void);
64 GType gnome_canvas_imageframe_get_type(void);
68 static void ardour_canvas_type_init()
70 // Map gtypes to gtkmm wrapper-creation functions:
72 Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
73 Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
74 Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
75 Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
77 // Register the gtkmm gtypes:
79 (void) Gnome::Canvas::WaveView::get_type();
80 (void) Gnome::Canvas::SimpleLine::get_type();
81 (void) Gnome::Canvas::SimpleRect::get_type();
82 (void) Gnome::Canvas::ImageFrame::get_type();
86 Editor::initialize_canvas ()
88 ArdourCanvas::init ();
89 ardour_canvas_type_init ();
91 /* don't try to center the canvas */
93 track_canvas.set_center_scroll_region (false);
94 track_canvas.set_dither (Gdk::RGB_DITHER_NONE);
96 track_canvas.signal_event().connect (bind (mem_fun (*this, &Editor::track_canvas_event), (ArdourCanvas::Item*) 0));
97 track_canvas.set_name ("EditorMainCanvas");
98 track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
99 track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
100 track_canvas.set_flags (CAN_FOCUS);
102 /* set up drag-n-drop */
104 vector<TargetEntry> target_table;
106 // Drag-N-Drop from the region list can generate this target
107 target_table.push_back (TargetEntry ("regions"));
109 target_table.push_back (TargetEntry ("text/plain"));
110 target_table.push_back (TargetEntry ("text/uri-list"));
111 target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
113 track_canvas.drag_dest_set (target_table);
114 track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
116 /* stuff for the verbose canvas cursor */
118 Pango::FontDescription font = get_font_for_style (N_("VerboseCanvasCursor"));
120 verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
121 verbose_canvas_cursor->property_font_desc() = font;
122 verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
123 verbose_canvas_cursor->property_fill_color_rgba() = color_map[cVerboseCanvasCursor];
125 verbose_cursor_visible = false;
127 /* a group to hold time (measure) lines */
129 time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
130 cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
132 time_canvas.set_name ("EditorTimeCanvas");
133 time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
134 time_canvas.set_flags (CAN_FOCUS);
135 time_canvas.set_center_scroll_region (false);
136 time_canvas.set_dither (Gdk::RGB_DITHER_NONE);
138 meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
139 tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
140 marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
141 range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
142 transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
144 tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
145 tempo_bar->property_fill_color_rgba() = color_map[cTempoBar];
146 tempo_bar->property_outline_pixels() = 0;
148 meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
149 meter_bar->property_fill_color_rgba() = color_map[cMeterBar];
150 meter_bar->property_outline_pixels() = 0;
152 marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
153 marker_bar->property_fill_color_rgba() = color_map[cMarkerBar];
154 marker_bar->property_outline_pixels() = 0;
156 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
157 range_marker_bar->property_fill_color_rgba() = color_map[cRangeMarkerBar];
158 range_marker_bar->property_outline_pixels() = 0;
160 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
161 transport_marker_bar->property_fill_color_rgba() = color_map[cTransportMarkerBar];
162 transport_marker_bar->property_outline_pixels() = 0;
164 range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
165 range_bar_drag_rect->property_fill_color_rgba() = color_map[cRangeDragBarRectFill];
166 range_bar_drag_rect->property_outline_color_rgba() = color_map[cRangeDragBarRect];
167 range_bar_drag_rect->property_outline_pixels() = 0;
168 range_bar_drag_rect->hide ();
170 transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height);
171 transport_bar_drag_rect ->property_fill_color_rgba() = color_map[cTransportDragRectFill];
172 transport_bar_drag_rect->property_outline_color_rgba() = color_map[cTransportDragRect];
173 transport_bar_drag_rect->property_outline_pixels() = 0;
174 transport_bar_drag_rect->hide ();
176 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
177 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
179 marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
180 marker_drag_line->property_width_pixels() = 1;
181 marker_drag_line->property_fill_color_rgba() = color_map[cMarkerDragLine];
182 marker_drag_line->property_points() = marker_drag_line_points;
183 marker_drag_line->hide();
185 range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
186 range_marker_drag_rect->property_fill_color_rgba() = color_map[cRangeDragRectFill];
187 range_marker_drag_rect->property_outline_color_rgba() = color_map[cRangeDragRect];
188 range_marker_drag_rect->hide ();
190 transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
191 transport_loop_range_rect->property_fill_color_rgba() = color_map[cTransportLoopRectFill];
192 transport_loop_range_rect->property_outline_color_rgba() = color_map[cTransportLoopRect];
193 transport_loop_range_rect->property_outline_pixels() = 1;
194 transport_loop_range_rect->hide();
196 transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
197 transport_punch_range_rect->property_fill_color_rgba() = color_map[cTransportPunchRectFill];
198 transport_punch_range_rect->property_outline_color_rgba() = color_map[cTransportPunchRect];
199 transport_punch_range_rect->property_outline_pixels() = 0;
200 transport_punch_range_rect->hide();
202 transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
204 transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
205 transport_punchin_line->property_x1() = 0.0;
206 transport_punchin_line->property_y1() = 0.0;
207 transport_punchin_line->property_x2() = 0.0;
208 transport_punchin_line->property_y2() = 0.0;
209 transport_punchin_line->property_color_rgba() = color_map[cPunchInLine];
210 transport_punchin_line->hide ();
212 transport_punchout_line = new ArdourCanvas::SimpleLine (*time_line_group);
213 transport_punchout_line->property_x1() = 0.0;
214 transport_punchout_line->property_y1() = 0.0;
215 transport_punchout_line->property_x2() = 0.0;
216 transport_punchout_line->property_y2() = 0.0;
217 transport_punchout_line->property_color_rgba() = color_map[cPunchOutLine];
218 transport_punchout_line->hide();
220 // used to show zoom mode active zooming
221 zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
222 zoom_rect->property_fill_color_rgba() = color_map[cZoomRectFill];
223 zoom_rect->property_outline_color_rgba() = color_map[cZoomRect];
224 zoom_rect->property_outline_pixels() = 1;
227 zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
229 // used as rubberband rect
230 rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
231 rubberband_rect->property_outline_color_rgba() = color_map[cRubberBandRect];
232 rubberband_rect->property_fill_color_rgba() = (guint32) color_map[cRubberBandRectFill];
233 rubberband_rect->property_outline_pixels() = 1;
234 rubberband_rect->hide();
236 tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
237 meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
238 marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
239 range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
240 transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
242 /* separator lines */
244 tempo_line = new ArdourCanvas::SimpleLine (*tempo_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
245 tempo_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
247 meter_line = new ArdourCanvas::SimpleLine (*meter_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
248 meter_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
250 marker_line = new ArdourCanvas::SimpleLine (*marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
251 marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
253 range_marker_line = new ArdourCanvas::SimpleLine (*range_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
254 range_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
256 transport_marker_line = new ArdourCanvas::SimpleLine (*transport_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
257 transport_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
259 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
260 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
262 double time_height = timebar_height * 5;
263 double time_width = FLT_MAX/frames_per_unit;
264 time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
266 if (!color_map[cEditCursor]) {
267 warning << _("edit cursor color not defined, check your ardour.colors file!") << endmsg;
268 color_map[cEditCursor] = RGBA_TO_UINT (30,30,30,255);
271 if (!color_map[cPlayHead]) {
272 warning << _("playhead color not defined, check your ardour.colors file!") << endmsg;
273 color_map[cPlayHead] = RGBA_TO_UINT (0,0,0,255);
276 edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
277 edit_cursor->canvas_item.property_fill_color_rgba() = color_map[cEditCursor];
278 playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
279 playhead_cursor->canvas_item.property_fill_color_rgba() = color_map[cPlayHead];
281 initial_ruler_update_required = true;
282 track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
287 Editor::track_canvas_allocate (Gtk::Allocation alloc)
289 canvas_allocation = alloc;
291 if (!initial_ruler_update_required) {
292 if (!canvas_idle_queued) {
293 /* call this first so that we do stuff before any pending redraw */
294 Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
295 canvas_idle_queued = true;
300 initial_ruler_update_required = false;
302 track_canvas_size_allocated ();
306 Editor::track_canvas_size_allocated ()
308 if (canvas_idle_queued) {
309 canvas_idle_queued = false;
312 canvas_width = canvas_allocation.get_width();
313 canvas_height = canvas_allocation.get_height();
315 full_canvas_height = canvas_height;
318 TrackViewList::iterator i;
321 for (i = track_views.begin(); i != track_views.end(); ++i) {
322 if ((*i)->control_parent) {
323 height += (*i)->effective_height;
324 height += track_spacing;
329 height -= track_spacing;
332 full_canvas_height = height;
335 zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
336 edit_cursor->set_position (edit_cursor->current_frame);
337 playhead_cursor->set_position (playhead_cursor->current_frame);
339 reset_hscrollbar_stepping ();
340 reset_scrolling_region ();
342 if (edit_cursor) edit_cursor->set_length (canvas_height);
343 if (playhead_cursor) playhead_cursor->set_length (canvas_height);
345 if (marker_drag_line) {
346 marker_drag_line_points.back().set_y(canvas_height);
347 marker_drag_line->property_points() = marker_drag_line_points;
350 if (range_marker_drag_rect) {
351 range_marker_drag_rect->property_y1() = 0.0;
352 range_marker_drag_rect->property_y2() = canvas_height;
355 if (transport_loop_range_rect) {
356 transport_loop_range_rect->property_y1() = 0.0;
357 transport_loop_range_rect->property_y2() = canvas_height;
360 if (transport_punch_range_rect) {
361 transport_punch_range_rect->property_y1() = 0.0;
362 transport_punch_range_rect->property_y2() = canvas_height;
365 if (transport_punchin_line) {
366 transport_punchin_line->property_y1() = 0.0;
367 transport_punchin_line->property_y2() = canvas_height;
370 if (transport_punchout_line) {
371 transport_punchout_line->property_y1() = 0.0;
372 transport_punchout_line->property_y2() = canvas_height;
375 update_fixed_rulers();
376 tempo_map_changed (Change (0), true);
378 Resized (); /* EMIT_SIGNAL */
384 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
386 TreeModel::Children rows = route_display_model->children();
387 TreeModel::Children::iterator i;
390 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
391 TimeAxisView *tv = (*i)[route_display_columns.tv];
392 if (tv != 0 && !tv->hidden()) {
393 pos += tv->effective_height;
394 pos += track_spacing;
398 double last_canvas_unit = last_canvas_frame / frames_per_unit;
400 track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
402 // XXX what is the correct height value for the time canvas ? this overstates it
403 time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
405 controls_layout.queue_resize();
409 Editor::controls_layout_size_request (Requisition* req)
411 TreeModel::Children rows = route_display_model->children();
412 TreeModel::Children::iterator i;
415 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
416 TimeAxisView *tv = (*i)[route_display_columns.tv];
418 pos += tv->effective_height;
419 pos += track_spacing;
423 RefPtr<Gdk::Screen> screen = get_screen();
426 screen = Gdk::Screen::get_default();
429 /* never let the width of the controls area shrink horizontally */
431 edit_controls_vbox.check_resize();
433 req->width = max (edit_controls_vbox.get_width(), controls_layout.get_width());
435 /* don't get too big. the fudge factors here are just guesses */
437 req->width = min (req->width, screen->get_width() - 300);
438 req->height = min ((gint) pos, (screen->get_height() - 400));
440 /* this one is important: it determines how big the layout thinks it really is, as
441 opposed to what it displays on the screen
444 controls_layout.set_size (req->width, (gint) pos);
448 Editor::track_canvas_map_handler (GdkEventAny* ev)
450 track_canvas.get_window()->set_cursor (*current_canvas_cursor);
455 Editor::time_canvas_map_handler (GdkEventAny* ev)
457 time_canvas.get_window()->set_cursor (*timebar_cursor);
462 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
464 const SelectionData& data,
465 guint info, guint time)
467 if (data.get_target() == "regions") {
468 drop_regions (context, x, y, data, info, time);
470 drop_paths (context, x, y, data, info, time);
475 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
477 const SelectionData& data,
478 guint info, guint time)
481 AudioTimeAxisView* tv;
483 vector<ustring> paths;
488 if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
492 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
498 track_canvas.window_to_world (x, y, wx, wy);
499 wx += horizontal_adjustment.get_value();
500 wy += vertical_adjustment.get_value();
502 ev.type = GDK_BUTTON_RELEASE;
506 frame = event_frame (&ev, 0, &cy);
510 if ((tvp = trackview_by_y_position (cy)) == 0) {
512 /* drop onto canvas background: create new tracks */
515 do_embed (paths, false, ImportAsTrack, 0, pos, false);
517 } else if ((tv = dynamic_cast<AudioTimeAxisView*>(tvp)) != 0) {
519 /* check that its an audio track, not a bus */
521 if (tv->get_diskstream()) {
522 do_embed (paths, false, ImportToTrack, tv->audio_track(), frame, true);
527 context->drag_finish (true, false, time);
531 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
533 const SelectionData& data,
534 guint info, guint time)
536 const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
537 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
539 for (uint32_t i = 0; i < sr->cnt; ++i) {
541 boost::shared_ptr<Region> r = sr->data[i];
542 boost::shared_ptr<AudioRegion> ar;
544 if ((ar = boost::dynamic_pointer_cast<AudioRegion>(r)) != 0) {
545 insert_region_list_drag (ar, x, y);
549 context->drag_finish (true, false, time);
553 Editor::maybe_autoscroll (GdkEvent* event)
555 nframes_t rightmost_frame = leftmost_frame + current_page_frames();
556 nframes_t frame = drag_info.current_pointer_frame;
557 bool startit = false;
559 static int last_autoscroll_direction = 0;
561 if (frame > rightmost_frame) {
563 if (rightmost_frame < max_frames) {
564 autoscroll_direction = 1;
568 } else if (frame < leftmost_frame) {
570 if (leftmost_frame > 0) {
571 autoscroll_direction = -1;
577 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
578 autoscroll_direction = -1;
580 autoscroll_direction = 1;
585 if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
586 stop_canvas_autoscroll ();
589 if (startit && autoscroll_timeout_tag < 0) {
590 start_canvas_autoscroll (autoscroll_direction);
593 last_autoscroll_direction = autoscroll_direction;
597 Editor::_autoscroll_canvas (void *arg)
599 return ((Editor *) arg)->autoscroll_canvas ();
603 Editor::autoscroll_canvas ()
606 nframes_t limit = max_frames - current_page_frames();
608 nframes_t target_frame;
610 if (autoscroll_direction < 0) {
611 if (leftmost_frame < autoscroll_distance) {
614 new_frame = leftmost_frame - autoscroll_distance;
616 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
618 if (leftmost_frame > limit - autoscroll_distance) {
621 new_frame = leftmost_frame + autoscroll_distance;
623 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
626 /* now fake a motion event to get the object that is being dragged to move too */
628 ev.type = GDK_MOTION_NOTIFY;
629 ev.state &= Gdk::BUTTON1_MASK;
630 ev.x = frame_to_unit (target_frame);
631 ev.y = drag_info.current_pointer_y;
632 motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
634 if (new_frame == 0 || new_frame == limit) {
641 if (autoscroll_cnt == 1) {
643 /* connect the timeout so that we get called repeatedly */
645 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
650 if (new_frame != leftmost_frame) {
651 reset_x_origin (new_frame);
654 if (autoscroll_cnt == 50) { /* 0.5 seconds */
656 /* after about a while, speed up a bit by changing the timeout interval */
658 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
660 } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
662 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
664 } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
666 /* after about another while, speed up by increasing the shift per callback */
668 autoscroll_distance = (nframes_t) floor (current_page_frames()/10.0f);
676 Editor::start_canvas_autoscroll (int dir)
678 if (!session || autoscroll_active) {
682 stop_canvas_autoscroll ();
684 autoscroll_active = true;
685 autoscroll_direction = dir;
686 autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
689 /* do it right now, which will start the repeated callbacks */
691 autoscroll_canvas ();
695 Editor::stop_canvas_autoscroll ()
697 if (autoscroll_timeout_tag >= 0) {
698 g_source_remove (autoscroll_timeout_tag);
699 autoscroll_timeout_tag = -1;
702 autoscroll_active = false;
706 Editor::left_track_canvas (GdkEventCrossing *ev)
708 set_entered_track (0);
709 set_entered_regionview (0);
715 Editor::canvas_horizontally_scrolled ()
717 /* this is the core function that controls horizontal scrolling of the canvas. it is called
718 whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
719 idle handler, which is important because tempo_map_changed() should issue redraws immediately
720 and not defer them to an idle handler.
723 leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
724 nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
726 if (rightmost_frame > last_canvas_frame) {
727 last_canvas_frame = rightmost_frame;
728 reset_scrolling_region ();
731 update_fixed_rulers ();
733 tempo_map_changed (Change (0), !_dragging_hscrollbar);