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livetrax/gtk2_ardour/editor_canvas.cc
David Robillard 95df144967 Editor GUI touchups:
Fixed separator lines between marker "tracks".
Fixed track alignment with track controls.
Changed track controls bevel to better fit in with canvas.
Made selected track controls colour match selected region colour (could maybe use a better colour for both though...).
Added frame to time labels to match toolbar.


git-svn-id: svn://localhost/ardour2/trunk@1622 d708f5d6-7413-0410-9779-e7cbd77b26cf
2007-03-19 06:53:16 +00:00

729 lines
23 KiB
C++

/*
Copyright (C) 2005 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <libgnomecanvasmm/init.h>
#include <jack/types.h>
#include <gtkmm2ext/utils.h>
#include <ardour/audioregion.h>
#include "ardour_ui.h"
#include "editor.h"
#include "waveview.h"
#include "simplerect.h"
#include "simpleline.h"
#include "imageframe.h"
#include "waveview_p.h"
#include "simplerect_p.h"
#include "simpleline_p.h"
#include "imageframe_p.h"
#include "canvas_impl.h"
#include "editing.h"
#include "rgb_macros.h"
#include "utils.h"
#include "time_axis_view.h"
#include "audio_time_axis.h"
#include "i18n.h"
using namespace std;
using namespace sigc;
using namespace ARDOUR;
using namespace PBD;
using namespace Gtk;
using namespace Glib;
using namespace Gtkmm2ext;
using namespace Editing;
/* XXX this is a hack. it ought to be the maximum value of an nframes_t */
const double max_canvas_coordinate = (double) JACK_MAX_FRAMES;
extern "C"
{
GType gnome_canvas_simpleline_get_type(void);
GType gnome_canvas_simplerect_get_type(void);
GType gnome_canvas_waveview_get_type(void);
GType gnome_canvas_imageframe_get_type(void);
}
static void ardour_canvas_type_init()
{
// Map gtypes to gtkmm wrapper-creation functions:
Glib::wrap_register(gnome_canvas_simpleline_get_type(), &Gnome::Canvas::SimpleLine_Class::wrap_new);
Glib::wrap_register(gnome_canvas_simplerect_get_type(), &Gnome::Canvas::SimpleRect_Class::wrap_new);
Glib::wrap_register(gnome_canvas_waveview_get_type(), &Gnome::Canvas::WaveView_Class::wrap_new);
Glib::wrap_register(gnome_canvas_imageframe_get_type(), &Gnome::Canvas::ImageFrame_Class::wrap_new);
// Register the gtkmm gtypes:
(void) Gnome::Canvas::WaveView::get_type();
(void) Gnome::Canvas::SimpleLine::get_type();
(void) Gnome::Canvas::SimpleRect::get_type();
(void) Gnome::Canvas::ImageFrame::get_type();
}
void
Editor::initialize_canvas ()
{
ArdourCanvas::init ();
ardour_canvas_type_init ();
/* don't try to center the canvas */
track_canvas.set_center_scroll_region (false);
track_canvas.set_dither (Gdk::RGB_DITHER_NONE);
track_canvas.signal_event().connect (bind (mem_fun (*this, &Editor::track_canvas_event), (ArdourCanvas::Item*) 0));
track_canvas.set_name ("EditorMainCanvas");
track_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK|Gdk::SCROLL_MASK);
track_canvas.signal_leave_notify_event().connect (mem_fun(*this, &Editor::left_track_canvas));
track_canvas.set_flags (CAN_FOCUS);
/* set up drag-n-drop */
vector<TargetEntry> target_table;
// Drag-N-Drop from the region list can generate this target
target_table.push_back (TargetEntry ("regions"));
target_table.push_back (TargetEntry ("text/plain"));
target_table.push_back (TargetEntry ("text/uri-list"));
target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
track_canvas.drag_dest_set (target_table);
track_canvas.signal_drag_data_received().connect (mem_fun(*this, &Editor::track_canvas_drag_data_received));
/* stuff for the verbose canvas cursor */
Pango::FontDescription font = get_font_for_style (N_("VerboseCanvasCursor"));
verbose_canvas_cursor = new ArdourCanvas::Text (*track_canvas.root());
verbose_canvas_cursor->property_font_desc() = font;
verbose_canvas_cursor->property_anchor() = ANCHOR_NW;
verbose_canvas_cursor->property_fill_color_rgba() = color_map[cVerboseCanvasCursor];
verbose_cursor_visible = false;
/* a group to hold time (measure) lines */
time_line_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
cursor_group = new ArdourCanvas::Group (*track_canvas.root(), 0.0, 0.0);
time_canvas.set_name ("EditorTimeCanvas");
time_canvas.add_events (Gdk::POINTER_MOTION_HINT_MASK);
time_canvas.set_flags (CAN_FOCUS);
time_canvas.set_center_scroll_region (false);
time_canvas.set_dither (Gdk::RGB_DITHER_NONE);
meter_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, 0.0);
tempo_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height);
marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 2.0);
range_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 3.0);
transport_marker_group = new ArdourCanvas::Group (*time_canvas.root(), 0.0, timebar_height * 4.0);
tempo_bar = new ArdourCanvas::SimpleRect (*tempo_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
tempo_bar->property_fill_color_rgba() = color_map[cTempoBar];
tempo_bar->property_outline_pixels() = 0;
meter_bar = new ArdourCanvas::SimpleRect (*meter_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
meter_bar->property_fill_color_rgba() = color_map[cMeterBar];
meter_bar->property_outline_pixels() = 0;
marker_bar = new ArdourCanvas::SimpleRect (*marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
marker_bar->property_fill_color_rgba() = color_map[cMarkerBar];
marker_bar->property_outline_pixels() = 0;
range_marker_bar = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
range_marker_bar->property_fill_color_rgba() = color_map[cRangeMarkerBar];
range_marker_bar->property_outline_pixels() = 0;
transport_marker_bar = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
transport_marker_bar->property_fill_color_rgba() = color_map[cTransportMarkerBar];
transport_marker_bar->property_outline_pixels() = 0;
range_bar_drag_rect = new ArdourCanvas::SimpleRect (*range_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
range_bar_drag_rect->property_fill_color_rgba() = color_map[cRangeDragBarRectFill];
range_bar_drag_rect->property_outline_color_rgba() = color_map[cRangeDragBarRect];
range_bar_drag_rect->property_outline_pixels() = 0;
range_bar_drag_rect->hide ();
transport_bar_drag_rect = new ArdourCanvas::SimpleRect (*transport_marker_group, 0.0, 0.0, max_canvas_coordinate, timebar_height-1.0);
transport_bar_drag_rect ->property_fill_color_rgba() = color_map[cTransportDragRectFill];
transport_bar_drag_rect->property_outline_color_rgba() = color_map[cTransportDragRect];
transport_bar_drag_rect->property_outline_pixels() = 0;
transport_bar_drag_rect->hide ();
marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
marker_drag_line_points.push_back(Gnome::Art::Point(0.0, 0.0));
marker_drag_line = new ArdourCanvas::Line (*track_canvas.root());
marker_drag_line->property_width_pixels() = 1;
marker_drag_line->property_fill_color_rgba() = color_map[cMarkerDragLine];
marker_drag_line->property_points() = marker_drag_line_points;
marker_drag_line->hide();
range_marker_drag_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
range_marker_drag_rect->property_fill_color_rgba() = color_map[cRangeDragRectFill];
range_marker_drag_rect->property_outline_color_rgba() = color_map[cRangeDragRect];
range_marker_drag_rect->hide ();
transport_loop_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
transport_loop_range_rect->property_fill_color_rgba() = color_map[cTransportLoopRectFill];
transport_loop_range_rect->property_outline_color_rgba() = color_map[cTransportLoopRect];
transport_loop_range_rect->property_outline_pixels() = 1;
transport_loop_range_rect->hide();
transport_punch_range_rect = new ArdourCanvas::SimpleRect (*time_line_group, 0.0, 0.0, 0.0, 0.0);
transport_punch_range_rect->property_fill_color_rgba() = color_map[cTransportPunchRectFill];
transport_punch_range_rect->property_outline_color_rgba() = color_map[cTransportPunchRect];
transport_punch_range_rect->property_outline_pixels() = 0;
transport_punch_range_rect->hide();
transport_loop_range_rect->lower_to_bottom (); // loop on the bottom
transport_punchin_line = new ArdourCanvas::SimpleLine (*time_line_group);
transport_punchin_line->property_x1() = 0.0;
transport_punchin_line->property_y1() = 0.0;
transport_punchin_line->property_x2() = 0.0;
transport_punchin_line->property_y2() = 0.0;
transport_punchin_line->property_color_rgba() = color_map[cPunchInLine];
transport_punchin_line->hide ();
transport_punchout_line = new ArdourCanvas::SimpleLine (*time_line_group);
transport_punchout_line->property_x1() = 0.0;
transport_punchout_line->property_y1() = 0.0;
transport_punchout_line->property_x2() = 0.0;
transport_punchout_line->property_y2() = 0.0;
transport_punchout_line->property_color_rgba() = color_map[cPunchOutLine];
transport_punchout_line->hide();
// used to show zoom mode active zooming
zoom_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
zoom_rect->property_fill_color_rgba() = color_map[cZoomRectFill];
zoom_rect->property_outline_color_rgba() = color_map[cZoomRect];
zoom_rect->property_outline_pixels() = 1;
zoom_rect->hide();
zoom_rect->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_zoom_rect_event), (ArdourCanvas::Item*) 0));
// used as rubberband rect
rubberband_rect = new ArdourCanvas::SimpleRect (*track_canvas.root(), 0.0, 0.0, 0.0, 0.0);
rubberband_rect->property_outline_color_rgba() = color_map[cRubberBandRect];
rubberband_rect->property_fill_color_rgba() = (guint32) color_map[cRubberBandRectFill];
rubberband_rect->property_outline_pixels() = 1;
rubberband_rect->hide();
tempo_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_tempo_bar_event), tempo_bar));
meter_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_meter_bar_event), meter_bar));
marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_marker_bar_event), marker_bar));
range_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_range_marker_bar_event), range_marker_bar));
transport_marker_bar->signal_event().connect (bind (mem_fun (*this, &Editor::canvas_transport_marker_bar_event), transport_marker_bar));
/* separator lines */
tempo_line = new ArdourCanvas::SimpleLine (*tempo_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
tempo_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
meter_line = new ArdourCanvas::SimpleLine (*meter_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
meter_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
marker_line = new ArdourCanvas::SimpleLine (*marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
range_marker_line = new ArdourCanvas::SimpleLine (*range_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
range_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
transport_marker_line = new ArdourCanvas::SimpleLine (*transport_marker_group, 0, timebar_height, max_canvas_coordinate, timebar_height);
transport_marker_line->property_color_rgba() = RGBA_TO_UINT (0,0,0,255);
ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_loop_range_view), false));
ZoomChanged.connect (bind (mem_fun(*this, &Editor::update_punch_range_view), false));
double time_height = timebar_height * 5;
double time_width = FLT_MAX/frames_per_unit;
time_canvas.set_scroll_region(0.0, 0.0, time_width, time_height);
if (!color_map[cEditCursor]) {
warning << _("edit cursor color not defined, check your ardour.colors file!") << endmsg;
color_map[cEditCursor] = RGBA_TO_UINT (30,30,30,255);
}
if (!color_map[cPlayHead]) {
warning << _("playhead color not defined, check your ardour.colors file!") << endmsg;
color_map[cPlayHead] = RGBA_TO_UINT (0,0,0,255);
}
edit_cursor = new Cursor (*this, &Editor::canvas_edit_cursor_event);
edit_cursor->canvas_item.property_fill_color_rgba() = color_map[cEditCursor];
playhead_cursor = new Cursor (*this, &Editor::canvas_playhead_cursor_event);
playhead_cursor->canvas_item.property_fill_color_rgba() = color_map[cPlayHead];
initial_ruler_update_required = true;
track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
}
void
Editor::track_canvas_allocate (Gtk::Allocation alloc)
{
canvas_allocation = alloc;
if (!initial_ruler_update_required) {
if (!canvas_idle_queued) {
/* call this first so that we do stuff before any pending redraw */
Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
canvas_idle_queued = true;
}
return;
}
initial_ruler_update_required = false;
track_canvas_size_allocated ();
}
bool
Editor::track_canvas_size_allocated ()
{
if (canvas_idle_queued) {
canvas_idle_queued = false;
}
canvas_width = canvas_allocation.get_width();
canvas_height = canvas_allocation.get_height();
full_canvas_height = canvas_height;
if (session) {
TrackViewList::iterator i;
double height = 0;
for (i = track_views.begin(); i != track_views.end(); ++i) {
if ((*i)->control_parent) {
height += (*i)->effective_height;
}
}
full_canvas_height = height;
}
zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
edit_cursor->set_position (edit_cursor->current_frame);
playhead_cursor->set_position (playhead_cursor->current_frame);
reset_hscrollbar_stepping ();
reset_scrolling_region ();
if (edit_cursor) edit_cursor->set_length (canvas_height);
if (playhead_cursor) playhead_cursor->set_length (canvas_height);
if (marker_drag_line) {
marker_drag_line_points.back().set_y(canvas_height);
marker_drag_line->property_points() = marker_drag_line_points;
}
if (range_marker_drag_rect) {
range_marker_drag_rect->property_y1() = 0.0;
range_marker_drag_rect->property_y2() = canvas_height;
}
if (transport_loop_range_rect) {
transport_loop_range_rect->property_y1() = 0.0;
transport_loop_range_rect->property_y2() = canvas_height;
}
if (transport_punch_range_rect) {
transport_punch_range_rect->property_y1() = 0.0;
transport_punch_range_rect->property_y2() = canvas_height;
}
if (transport_punchin_line) {
transport_punchin_line->property_y1() = 0.0;
transport_punchin_line->property_y2() = canvas_height;
}
if (transport_punchout_line) {
transport_punchout_line->property_y1() = 0.0;
transport_punchout_line->property_y2() = canvas_height;
}
update_fixed_rulers();
tempo_map_changed (Change (0), true);
Resized (); /* EMIT_SIGNAL */
return false;
}
void
Editor::reset_scrolling_region (Gtk::Allocation* alloc)
{
TreeModel::Children rows = route_display_model->children();
TreeModel::Children::iterator i;
double pos;
for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
TimeAxisView *tv = (*i)[route_display_columns.tv];
if (tv != 0 && !tv->hidden()) {
pos += tv->effective_height;
}
}
double last_canvas_unit = last_canvas_frame / frames_per_unit;
track_canvas.set_scroll_region (0.0, 0.0, max (last_canvas_unit, canvas_width), pos);
// XXX what is the correct height value for the time canvas ? this overstates it
time_canvas.set_scroll_region ( 0.0, 0.0, max (last_canvas_unit, canvas_width), canvas_height);
controls_layout.queue_resize();
}
void
Editor::controls_layout_size_request (Requisition* req)
{
TreeModel::Children rows = route_display_model->children();
TreeModel::Children::iterator i;
double pos;
for (pos = 0, i = rows.begin(); i != rows.end(); ++i) {
TimeAxisView *tv = (*i)[route_display_columns.tv];
if (tv != 0) {
pos += tv->effective_height;
}
}
RefPtr<Gdk::Screen> screen = get_screen();
if (!screen) {
screen = Gdk::Screen::get_default();
}
/* never let the width of the controls area shrink horizontally */
edit_controls_vbox.check_resize();
req->width = max (edit_controls_vbox.get_width(), controls_layout.get_width());
/* don't get too big. the fudge factors here are just guesses */
req->width = min (req->width, screen->get_width() - 300);
req->height = min ((gint) pos, (screen->get_height() - 400));
/* this one is important: it determines how big the layout thinks it really is, as
opposed to what it displays on the screen
*/
controls_layout.set_size (req->width, (gint) pos);
}
bool
Editor::track_canvas_map_handler (GdkEventAny* ev)
{
track_canvas.get_window()->set_cursor (*current_canvas_cursor);
return false;
}
bool
Editor::time_canvas_map_handler (GdkEventAny* ev)
{
time_canvas.get_window()->set_cursor (*timebar_cursor);
return false;
}
void
Editor::track_canvas_drag_data_received (const RefPtr<Gdk::DragContext>& context,
int x, int y,
const SelectionData& data,
guint info, guint time)
{
if (data.get_target() == "regions") {
drop_regions (context, x, y, data, info, time);
} else {
drop_paths (context, x, y, data, info, time);
}
}
void
Editor::drop_paths (const RefPtr<Gdk::DragContext>& context,
int x, int y,
const SelectionData& data,
guint info, guint time)
{
TimeAxisView* tvp;
AudioTimeAxisView* tv;
double cy;
vector<ustring> paths;
string spath;
GdkEvent ev;
nframes_t frame;
if (convert_drop_to_paths (paths, context, x, y, data, info, time)) {
goto out;
}
/* D-n-D coordinates are window-relative, so convert to "world" coordinates
*/
double wx;
double wy;
track_canvas.window_to_world (x, y, wx, wy);
wx += horizontal_adjustment.get_value();
wy += vertical_adjustment.get_value();
ev.type = GDK_BUTTON_RELEASE;
ev.button.x = wx;
ev.button.y = wy;
frame = event_frame (&ev, 0, &cy);
snap_to (frame);
if ((tvp = trackview_by_y_position (cy)) == 0) {
/* drop onto canvas background: create new tracks */
nframes_t pos = 0;
do_embed (paths, false, ImportAsTrack, 0, pos, false);
} else if ((tv = dynamic_cast<AudioTimeAxisView*>(tvp)) != 0) {
/* check that its an audio track, not a bus */
if (tv->get_diskstream()) {
do_embed (paths, false, ImportToTrack, tv->audio_track(), frame, true);
}
}
out:
context->drag_finish (true, false, time);
}
void
Editor::drop_regions (const RefPtr<Gdk::DragContext>& context,
int x, int y,
const SelectionData& data,
guint info, guint time)
{
const SerializedObjectPointers<boost::shared_ptr<Region> >* sr =
reinterpret_cast<const SerializedObjectPointers<boost::shared_ptr<Region> > *> (data.get_data());
for (uint32_t i = 0; i < sr->cnt; ++i) {
boost::shared_ptr<Region> r = sr->data[i];
boost::shared_ptr<AudioRegion> ar;
if ((ar = boost::dynamic_pointer_cast<AudioRegion>(r)) != 0) {
insert_region_list_drag (ar, x, y);
}
}
context->drag_finish (true, false, time);
}
void
Editor::maybe_autoscroll (GdkEvent* event)
{
nframes_t rightmost_frame = leftmost_frame + current_page_frames();
nframes_t frame = drag_info.current_pointer_frame;
bool startit = false;
static int last_autoscroll_direction = 0;
if (frame > rightmost_frame) {
if (rightmost_frame < max_frames) {
autoscroll_direction = 1;
startit = true;
}
} else if (frame < leftmost_frame) {
if (leftmost_frame > 0) {
autoscroll_direction = -1;
startit = true;
}
} else {
if (drag_info.last_pointer_frame > drag_info.current_pointer_frame) {
autoscroll_direction = -1;
} else {
autoscroll_direction = 1;
}
}
if ((autoscroll_direction != last_autoscroll_direction) || (leftmost_frame < frame < rightmost_frame)) {
stop_canvas_autoscroll ();
}
if (startit && autoscroll_timeout_tag < 0) {
start_canvas_autoscroll (autoscroll_direction);
}
last_autoscroll_direction = autoscroll_direction;
}
gint
Editor::_autoscroll_canvas (void *arg)
{
return ((Editor *) arg)->autoscroll_canvas ();
}
bool
Editor::autoscroll_canvas ()
{
nframes_t new_frame;
nframes_t limit = max_frames - current_page_frames();
GdkEventMotion ev;
nframes_t target_frame;
if (autoscroll_direction < 0) {
if (leftmost_frame < autoscroll_distance) {
new_frame = 0;
} else {
new_frame = leftmost_frame - autoscroll_distance;
}
target_frame = drag_info.current_pointer_frame - autoscroll_distance;
} else {
if (leftmost_frame > limit - autoscroll_distance) {
new_frame = limit;
} else {
new_frame = leftmost_frame + autoscroll_distance;
}
target_frame = drag_info.current_pointer_frame + autoscroll_distance;
}
/* now fake a motion event to get the object that is being dragged to move too */
ev.type = GDK_MOTION_NOTIFY;
ev.state &= Gdk::BUTTON1_MASK;
ev.x = frame_to_unit (target_frame);
ev.y = drag_info.current_pointer_y;
motion_handler (drag_info.item, (GdkEvent*) &ev, drag_info.item_type, true);
if (new_frame == 0 || new_frame == limit) {
/* we are done */
return false;
}
autoscroll_cnt++;
if (autoscroll_cnt == 1) {
/* connect the timeout so that we get called repeatedly */
autoscroll_timeout_tag = g_idle_add ( _autoscroll_canvas, this);
return false;
}
if (new_frame != leftmost_frame) {
reset_x_origin (new_frame);
}
if (autoscroll_cnt == 50) { /* 0.5 seconds */
/* after about a while, speed up a bit by changing the timeout interval */
autoscroll_distance = (nframes_t) floor (current_page_frames()/30.0f);
} else if (autoscroll_cnt == 150) { /* 1.0 seconds */
autoscroll_distance = (nframes_t) floor (current_page_frames()/20.0f);
} else if (autoscroll_cnt == 300) { /* 1.5 seconds */
/* after about another while, speed up by increasing the shift per callback */
autoscroll_distance = (nframes_t) floor (current_page_frames()/10.0f);
}
return true;
}
void
Editor::start_canvas_autoscroll (int dir)
{
if (!session || autoscroll_active) {
return;
}
stop_canvas_autoscroll ();
autoscroll_active = true;
autoscroll_direction = dir;
autoscroll_distance = (nframes_t) floor (current_page_frames()/50.0);
autoscroll_cnt = 0;
/* do it right now, which will start the repeated callbacks */
autoscroll_canvas ();
}
void
Editor::stop_canvas_autoscroll ()
{
if (autoscroll_timeout_tag >= 0) {
g_source_remove (autoscroll_timeout_tag);
autoscroll_timeout_tag = -1;
}
autoscroll_active = false;
}
gint
Editor::left_track_canvas (GdkEventCrossing *ev)
{
set_entered_track (0);
set_entered_regionview (0);
return FALSE;
}
void
Editor::canvas_horizontally_scrolled ()
{
/* this is the core function that controls horizontal scrolling of the canvas. it is called
whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
idle handler, which is important because tempo_map_changed() should issue redraws immediately
and not defer them to an idle handler.
*/
leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
if (rightmost_frame > last_canvas_frame) {
last_canvas_frame = rightmost_frame;
reset_scrolling_region ();
}
update_fixed_rulers ();
tempo_map_changed (Change (0), !_dragging_hscrollbar);
}