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livetrax/gtk2_ardour/editor_canvas.cc
David Robillard fe13d08874 Large nasty commit in the form of a 5000 line patch chock-full of completely
unecessary changes.  (Sorry, doing a "sprint" based thing, this is the end of the first one)

Achieved MIDI track and bus creation, associated Jack port and diskstream creation, and minimal GUI stuff for creating them.  Should be set to start work on actually recording and playing midi to/from disk now.

Relevant (significant) changes:

- Creation of a Buffer class.  Base class is type agnostic so things can point to a buffer but not care what kind it is (otherwise it'd be a template).  Derived into AudioBuffer and MidiBuffer, with a type tag because checking type is necessary in parts of the code where dynamic_cast wouldn't be wise.  Originally I considered this a hack, but passing around a type proved to be a very good solution to all the other problems (below).  There is a 1:1 mapping between jack port data types and ardour Buffer types (with a conversion function), but that's easily removed if it ever becomes necessary.  Having the type scoped in the Buffer class is maybe not the best spot for it, but whatever (this is proof of concept kinda stuff right now...)

- IO now has a "default" port type (passed to the constructor and stored as a member), used by ensure_io (and similar) to create n ports.  IO::register_***_port has a type argument that defaults to the default type if not passed.  Rationale:  previous IO API is identical, no changes needed to existing code, but path is paved for multiple port types in one IO, which we will need for eg synth plugin inserts, among other things.  This is not quite ideal (best would be to only have the two port register functions and have them take a type), but the alternative is a lot of work (namely destroying the 'ensure' functions and everything that uses them) for very little gain.  (I am convinced after quite a few tries at the whiteboard that subclassing IO in any way is not a feasible option, look at it's inheritance diagram in Doxygen and you can see why)

- AudioEngine::register_audio_input_port is now register_input_port and takes a type argument.  Ditto for output.

- (Most significant change) AudioDiskstream abstracted into Distream, and sibling MidiDiskstream created.  Very much still a work in progress, but Diskstream is there to switch references over to (most already are), which is the important part.  It is still unclear what the MIDI diskstream's relation to channels is, but I'm pretty sure they will be single channel only (so SMF Type 0) since noone can come up with a reason otherwise.

- MidiTrack creation.  Same thing as AudioTrack but with a different default type basically.  No big deal here.

- Random cleanups and variable renamings etc. because I have OCD and can't help myself. :)

Known broken:  Loading of sessions containing MIDI tracks.




git-svn-id: svn://localhost/ardour2/branches/midi@641 d708f5d6-7413-0410-9779-e7cbd77b26cf
2006-06-26 16:01:34 +00:00

657 lines
21 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.
$Id$
*/
#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 jack_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.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);
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);
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);
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);
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);
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);
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);
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);
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);
edit_cursor = new Cursor (*this, "blue", &Editor::canvas_edit_cursor_event);
playhead_cursor = new Cursor (*this, "red", &Editor::canvas_playhead_cursor_event);
track_canvas.signal_size_allocate().connect (mem_fun(*this, &Editor::track_canvas_allocate));
}
void
Editor::track_canvas_allocate (Gtk::Allocation alloc)
{
static bool first_time = true;
canvas_width = alloc.get_width();
canvas_height = alloc.get_height();
zoom_range_clock.set ((jack_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_x(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 ();
if (is_visible() && first_time) {
tempo_map_changed (Change (0));
first_time = false;
} else {
redisplay_tempo ();
}
Resized (); /* EMIT_SIGNAL */
}
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;
pos += track_spacing;
}
}
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;
pos += track_spacing;
}
}
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;
jack_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 */
jack_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 DnDTreeView::SerializedObjectPointers* sr = reinterpret_cast<const DnDTreeView::SerializedObjectPointers*> (data.get_data());
for (uint32_t i = 0; i < sr->cnt; ++i) {
Region* r = reinterpret_cast<Region*> (sr->ptr[i]);
AudioRegion* ar;
if ((ar = dynamic_cast<AudioRegion*>(r)) != 0) {
insert_region_list_drag (*ar, x, y);
}
}
context->drag_finish (true, false, time);
}
void
Editor::maybe_autoscroll (GdkEvent* event)
{
jack_nframes_t rightmost_frame = leftmost_frame + current_page_frames();
jack_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) {
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 ();
}
gint
Editor::autoscroll_canvas ()
{
jack_nframes_t new_frame;
bool keep_calling = true;
jack_nframes_t limit = max_frames - current_page_frames();
GdkEventMotion ev;
jack_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;
}
if (new_frame != leftmost_frame) {
reposition_x_origin (new_frame);
}
/* 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 = gtk_timeout_add (20, _autoscroll_canvas, this);
keep_calling = false;
} else if (autoscroll_cnt == 50) { /* 0.5 seconds */
/* after about a while, speed up a bit by changing the timeout interval */
autoscroll_distance = (jack_nframes_t) floor (current_page_frames()/50.0f);
} else if (autoscroll_cnt == 75) { /* 1.0 seconds */
autoscroll_distance = (jack_nframes_t) floor (current_page_frames()/20.0f);
} else if (autoscroll_cnt == 100) { /* 1.5 seconds */
/* after about another while, speed up by increasing the shift per callback */
autoscroll_distance = (jack_nframes_t) floor (current_page_frames()/10.0f);
}
return keep_calling;
}
void
Editor::start_canvas_autoscroll (int dir)
{
if (!session) {
return;
}
stop_canvas_autoscroll ();
autoscroll_direction = dir;
autoscroll_distance = (jack_nframes_t) floor (current_page_frames()/100.0);
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) {
gtk_timeout_remove (autoscroll_timeout_tag);
autoscroll_timeout_tag = -1;
}
}
gint
Editor::left_track_canvas (GdkEventCrossing *ev)
{
set_entered_track (0);
set_entered_regionview (0);
return FALSE;
}