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_pixels() = 0;
166 meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
167 meter_bar->property_fill_color_rgba() = color_map[cMeterBar];
168 meter_bar->property_outline_pixels() = 0;
170 marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
171 marker_bar->property_fill_color_rgba() = color_map[cMarkerBar];
172 marker_bar->property_outline_pixels() = 0;
174 range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
175 range_marker_bar->property_fill_color_rgba() = color_map[cRangeMarkerBar];
176 range_marker_bar->property_outline_pixels() = 0;
178 transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
179 transport_marker_bar->property_fill_color_rgba() = color_map[cTransportMarkerBar];
180 transport_marker_bar->property_outline_pixels() = 0;
182 range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
183 range_bar_drag_rect->property_fill_color_rgba() = color_map[cRangeDragBarRectFill];
184 range_bar_drag_rect->property_outline_color_rgba() = color_map[cRangeDragBarRect];
185 range_bar_drag_rect->property_outline_pixels() = 0;
186 range_bar_drag_rect->hide ();
188 transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
189 transport_bar_drag_rect ->property_fill_color_rgba() = color_map[cTransportDragRectFill];
190 transport_bar_drag_rect->property_outline_color_rgba() = color_map[cTransportDragRect];
191 transport_bar_drag_rect->property_outline_pixels() = 0;
192 transport_bar_drag_rect->hide ();
194 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
195 marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
197 marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
198 marker_drag_line->property_width_pixels() = 1;
199 marker_drag_line->property_fill_color_rgba() = color_map[cMarkerDragLine];
200 marker_drag_line->property_points() = marker_drag_line_points;
201 marker_drag_line->hide();
203 range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
204 range_marker_drag_rect->property_fill_color_rgba() = color_map[cRangeDragRectFill];
205 range_marker_drag_rect->property_outline_color_rgba() = color_map[cRangeDragRect];
206 range_marker_drag_rect->hide ();
208 transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
209 transport_loop_range_rect->property_fill_color_rgba() = color_map[cTransportLoopRectFill];
210 transport_loop_range_rect->property_outline_color_rgba() = color_map[cTransportLoopRect];
211 transport_loop_range_rect->property_outline_pixels() = 1;
212 transport_loop_range_rect->hide();
214 transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
215 transport_punch_range_rect->property_fill_color_rgba() = color_map[cTransportPunchRectFill];
216 transport_punch_range_rect->property_outline_color_rgba() = color_map[cTransportPunchRect];
217 transport_punch_range_rect->property_outline_pixels() = 0;
218 transport_punch_range_rect->hide();
220 transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
222 transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
223 transport_punchin_line->property_x1() = 0.0;
224 transport_punchin_line->property_y1() = 0.0;
225 transport_punchin_line->property_x2() = 0.0;
226 transport_punchin_line->property_y2() = 0.0;
227 transport_punchin_line->property_color_rgba() = color_map[cPunchInLine];
228 transport_punchin_line->hide ();
230 transport_punchout_line = new ArdourCanvas::SimpleLine (*time_line_group);
231 transport_punchout_line->property_x1() = 0.0;
232 transport_punchout_line->property_y1() = 0.0;
233 transport_punchout_line->property_x2() = 0.0;
234 transport_punchout_line->property_y2() = 0.0;
235 transport_punchout_line->property_color_rgba() = color_map[cPunchOutLine];
236 transport_punchout_line->hide();
238 // used to show zoom mode active zooming
239 zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
240 zoom_rect->property_fill_color_rgba() = color_map[cZoomRectFill];
241 zoom_rect->property_outline_color_rgba() = color_map[cZoomRect];
242 zoom_rect->property_outline_pixels() = 1;
245 zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
247 // used as rubberband rect
248 rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
249 rubberband_rect->property_outline_color_rgba() = color_map[cRubberBandRect];
250 rubberband_rect->property_fill_color_rgba() = (guint32) color_map[cRubberBandRectFill];
251 rubberband_rect->property_outline_pixels() = 1;
252 rubberband_rect->hide();
254 tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
255 meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
256 marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
257 range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
258 transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
260 /* separator lines */
262 tempo_line = new ArdourCanvas::SimpleLine (*tempo_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
263 tempo_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
265 meter_line = new ArdourCanvas::SimpleLine (*meter_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
266 meter_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
268 marker_line = new ArdourCanvas::SimpleLine (*marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
269 marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
271 range_marker_line = new ArdourCanvas::SimpleLine (*range_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
272 range_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
274 transport_marker_line = new ArdourCanvas::SimpleLine (*transport_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
275 transport_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
277 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
278 ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
280 double time_height = timebar_height * 5;
281 double time_width = FLT_MAX/frames_per_unit;
282 time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
284 if (!color_map[cEditCursor]) {
285 warning << _("edit cursor color not defined, check your ardour.colors file!") << endmsg;
286 color_map[cEditCursor] = RGBA_TO_UINT (30,30,30,255);
289 if (!color_map[cPlayHead]) {
290 warning << _("playhead color not defined, check your ardour.colors file!") << endmsg;
291 color_map[cPlayHead] = RGBA_TO_UINT (0,0,0,255);
294 edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
295 edit_cursor->canvas_item.property_fill_color_rgba() = color_map[cEditCursor];
296 playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
297 playhead_cursor->canvas_item.property_fill_color_rgba() = color_map[cPlayHead];
299 initial_ruler_update_required = true;
300 track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
305 Editor::track_canvas_allocate (Gtk::Allocation alloc)
307 canvas_allocation = alloc;
309 if (!initial_ruler_update_required) {
310 if (!canvas_idle_queued) {
311 /* call this first so that we do stuff before any pending redraw */
312 Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
313 canvas_idle_queued = true;
318 initial_ruler_update_required = false;
320 track_canvas_size_allocated ();
324 Editor::track_canvas_size_allocated ()
326 if (canvas_idle_queued) {
327 canvas_idle_queued = false;
330 canvas_width = canvas_allocation.get_width();
331 canvas_height = canvas_allocation.get_height();
333 full_canvas_height = canvas_height;
336 TrackViewList::iterator i;
339 for (i = track_views.begin(); i != track_views.end(); ++i) {
340 if ((*i)->control_parent) {
341 height += (*i)->effective_height;
345 full_canvas_height = height;
348 zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
349 edit_cursor->set_position (edit_cursor->current_frame);
350 playhead_cursor->set_position (playhead_cursor->current_frame);
352 reset_hscrollbar_stepping ();
353 reset_scrolling_region ();
355 if (edit_cursor) edit_cursor->set_length (canvas_height);
356 if (playhead_cursor) playhead_cursor->set_length (canvas_height);
358 if (marker_drag_line) {
359 marker_drag_line_points.back().set_y(canvas_height);
360 marker_drag_line->property_points() = marker_drag_line_points;
363 if (range_marker_drag_rect) {
364 range_marker_drag_rect->property_y1() = 0.0;
365 range_marker_drag_rect->property_y2() = canvas_height;
368 if (transport_loop_range_rect) {
369 transport_loop_range_rect->property_y1() = 0.0;
370 transport_loop_range_rect->property_y2() = canvas_height;
373 if (transport_punch_range_rect) {
374 transport_punch_range_rect->property_y1() = 0.0;
375 transport_punch_range_rect->property_y2() = canvas_height;
378 if (transport_punchin_line) {
379 transport_punchin_line->property_y1() = 0.0;
380 transport_punchin_line->property_y2() = canvas_height;
383 if (transport_punchout_line) {
384 transport_punchout_line->property_y1() = 0.0;
385 transport_punchout_line->property_y2() = canvas_height;
388 update_fixed_rulers();
389 redisplay_tempo (true);
391 Resized (); /* EMIT_SIGNAL */
397 Editor::reset_scrolling_region (Gtk::Allocation* alloc)
399 TreeModel::Children rows = route_display_model->children();
400 TreeModel::Children::iterator i;
403 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
404 TimeAxisView *tv = (*i)[route_display_columns.tv];
405 if (tv != 0 && !tv->hidden()) {
406 pos += tv->effective_height;
410 double last_canvas_unit = last_canvas_frame / frames_per_unit;
412 track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
414 // XXX what is the correct height value for the time canvas ? this overstates it
415 time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
417 controls_layout.queue_resize();
421 Editor::controls_layout_size_request (Requisition* req)
423 TreeModel::Children rows = route_display_model->children();
424 TreeModel::Children::iterator i;
427 for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
428 TimeAxisView *tv = (*i)[route_display_columns.tv];
430 pos += tv->effective_height;
434 RefPtr<Gdk::Screen> screen = get_screen();
437 screen = Gdk::Screen::get_default();
440 /* never let the width of the controls area shrink horizontally */
442 edit_controls_vbox.check_resize();
444 req->width = max (edit_controls_vbox.get_width(), controls_layout.get_width());
446 /* don't get too big. the fudge factors here are just guesses */
448 req->width = min (req->width, screen->get_width() - 300);
449 req->height = min ((gint) pos, (screen->get_height() - 400));
451 /* this one is important: it determines how big the layout thinks it really is, as
452 opposed to what it displays on the screen
455 controls_layout.set_size (req->width, (gint) pos);
459 Editor::track_canvas_map_handler (GdkEventAny* ev)
461 track_canvas.get_window()->set_cursor (*current_canvas_cursor);
466 Editor::time_canvas_map_handler (GdkEventAny* ev)
468 time_canvas.get_window()->set_cursor (*timebar_cursor);
473 Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
475 const SelectionData& data,
476 guint info, guint time)
478 if (data.get_target() == "regions") {
479 drop_regions (context, x, y, data, info, time);
481 drop_paths (context, x, y, data, info, time);
486 Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
488 const SelectionData& data,
489 guint info, guint time)
492 RouteTimeAxisView* tv;
494 vector<ustring> paths;
499 if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
503 /* D-n-D coordinates are window-relative, so convert to "world" coordinates
509 track_canvas.window_to_world (x, y, wx, wy);
510 wx += horizontal_adjustment.get_value();
511 wy += vertical_adjustment.get_value();
513 ev.type = GDK_BUTTON_RELEASE;
517 frame = event_frame (&ev, 0, &cy);
521 if ((tvp = trackview_by_y_position (cy)) == 0) {
523 /* drop onto canvas background: create new tracks */
526 do_embed (paths, false, ImportAsTrack, 0, pos, false);
528 } else if ((tv = dynamic_cast<RouteTimeAxisView*>(tvp)) != 0) {
530 /* check that its an audio track, not a bus */
532 if (tv->get_diskstream()) {
533 do_embed (paths, false, ImportToTrack, tv->audio_track(), frame, true);
538 context->drag_finish (true, false, time);
542 Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
544 const SelectionData& data,
545 guint info, guint time)
547 const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
548 reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
550 for (uint32_t i = 0; i < sr->cnt; ++i) {
552 boost::shared_ptr<Region> r = sr->data[i];
554 insert_region_list_drag (r, x, y);
557 context->drag_finish (true, false, time);
561 Editor::maybe_autoscroll (GdkEvent* event)
563 nframes_t rightmost_frame = leftmost_frame + current_page_frames();
564 nframes_t frame = drag_info.current_pointer_frame;
565 bool startit = false;
567 static int last_autoscroll_direction = 0;
569 if (frame > rightmost_frame) {
571 if (rightmost_frame < max_frames) {
572 autoscroll_direction = 1;
576 } else if (frame < leftmost_frame) {
578 if (leftmost_frame > 0) {
579 autoscroll_direction = -1;
585 if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
586 autoscroll_direction = -1;
588 autoscroll_direction = 1;
593 if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
594 stop_canvas_autoscroll ();
597 if (startit && autoscroll_timeout_tag < 0) {
598 start_canvas_autoscroll (autoscroll_direction);
601 last_autoscroll_direction = autoscroll_direction;
605 Editor::_autoscroll_canvas (void *arg)
607 return ((Editor *) arg)->autoscroll_canvas ();
611 Editor::autoscroll_canvas ()
614 nframes_t limit = max_frames - current_page_frames();
616 nframes_t target_frame;
618 if (autoscroll_direction < 0) {
619 if (leftmost_frame < autoscroll_distance) {
622 new_frame = leftmost_frame - autoscroll_distance;
624 target_frame = drag_info.current_pointer_frame - autoscroll_distance;
626 if (leftmost_frame > limit - autoscroll_distance) {
629 new_frame = leftmost_frame + autoscroll_distance;
631 target_frame = drag_info.current_pointer_frame + autoscroll_distance;
634 /* now fake a motion event to get the object that is being dragged to move too */
636 ev.type = GDK_MOTION_NOTIFY;
637 ev.state &= Gdk::BUTTON1_MASK;
638 ev.x = frame_to_unit (target_frame);
639 ev.y = drag_info.current_pointer_y;
640 motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
642 if (new_frame == 0 || new_frame == limit) {
649 if (autoscroll_cnt == 1) {
651 /* connect the timeout so that we get called repeatedly */
653 autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
658 if (new_frame != leftmost_frame) {
659 reset_x_origin (new_frame);
662 if (autoscroll_cnt == 50) { /* 0.5 seconds */
664 /* after about a while, speed up a bit by changing the timeout interval */
666 autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
668 } else if (autoscroll_cnt == 150) { /* 1.0 seconds */
670 autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
672 } else if (autoscroll_cnt == 300) { /* 1.5 seconds */
674 /* after about another while, speed up by increasing the shift per callback */
676 autoscroll_distance = (nframes_t) floor (current_page_frames()/10.0f);
684 Editor::start_canvas_autoscroll (int dir)
686 if (!session || autoscroll_active) {
690 stop_canvas_autoscroll ();
692 autoscroll_active = true;
693 autoscroll_direction = dir;
694 autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
697 /* do it right now, which will start the repeated callbacks */
699 autoscroll_canvas ();
703 Editor::stop_canvas_autoscroll ()
705 if (autoscroll_timeout_tag >= 0) {
706 g_source_remove (autoscroll_timeout_tag);
707 autoscroll_timeout_tag = -1;
710 autoscroll_active = false;
714 Editor::left_track_canvas (GdkEventCrossing *ev)
716 set_entered_track (0);
717 set_entered_regionview (0);
723 Editor::canvas_horizontally_scrolled ()
725 /* this is the core function that controls horizontal scrolling of the canvas. it is called
726 whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
727 idle handler, which is important because tempo_map_changed() should issue redraws immediately
728 and not defer them to an idle handler.
731 leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
732 nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
734 if (rightmost_frame > last_canvas_frame) {
735 last_canvas_frame = rightmost_frame;
736 reset_scrolling_region ();
739 update_fixed_rulers ();
741 redisplay_tempo (!_dragging_hscrollbar);