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livetrax/gtk2_ardour/editor_hscroller.cc

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/*
Copyright (C) 2002 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 "editor.h"
#include <ardour/session.h>
using namespace std;
using namespace ARDOUR;
void
Editor::hscroll_slider_allocate (GtkAllocation *alloc)
{
//edit_hscroll_slider_width = alloc->width;
//edit_hscroll_slider_height = alloc->height ;
if (session) {
track_canvas_scroller.get_hadjustment()->set_upper (session->current_end_frame() / frames_per_unit);
}
}
gint
Editor::hscroll_slider_expose (GdkEventExpose *ev)
{
GdkRectangle draw_rect;
GdkRectangle bar_rect;
gint bar_max = edit_hscroll_slider_width - 2;
bar_rect.y = 1;
bar_rect.height = edit_hscroll_slider_height - 2;
if (session) {
bar_rect.width = (gint) floor (bar_max * ((canvas_width * frames_per_unit) / session->current_end_frame()));
if (bar_rect.width > bar_max) {
bar_rect.x = 1;
bar_rect.width = bar_max;
} else {
bar_rect.x = 1 + (gint) floor (bar_max * ((double) leftmost_frame / session->current_end_frame()));
}
} else {
bar_rect.x = 1;
bar_rect.width = bar_max;
}
/* make sure we can see the bar at all times, and have enough to do zoom-trim on */
bar_rect.width = max ((guint16) (edit_hscroll_edge_width+5), bar_rect.width);
gdk_rectangle_intersect (&ev->area, &bar_rect, &draw_rect);
gtk_paint_box (edit_hscroll_slider.get_style()->gtkobj(),
edit_hscroll_slider.get_window(),
GTK_STATE_ACTIVE,
GTK_SHADOW_IN,
&ev->area,
GTK_WIDGET(edit_hscroll_slider.gtkobj()),
"trough",
0, 0, -1, -1);
gtk_paint_box (edit_hscroll_slider.get_style()->gtkobj(),
edit_hscroll_slider.get_window(),
GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
&draw_rect,
GTK_WIDGET(edit_hscroll_slider.gtkobj()),
"hscale",
bar_rect.x, bar_rect.y, bar_rect.width, bar_rect.height);
return TRUE;
}
gint
Editor::hscroll_slider_button_press (GdkEventButton *ev)
{
if (!session) {
return TRUE;
}
edit_hscroll_dragging = true;
//cerr << "PRESS" << endl;
return TRUE;
gint start;
gint width;
gint end;
gint x;
start = (gint) floor (edit_hscroll_slider_width * ((double) leftmost_frame / session->current_end_frame()));
width = (gint) floor (edit_hscroll_slider_width * ((canvas_width * frames_per_unit) / session->current_end_frame()));
end = start + width - 1;
x = (gint) max (0.0, ev->x);
if (x >= start && x <= end) {
edit_hscroll_drag_last = x;
edit_hscroll_dragging = true;
Gtk::Main::grab_add (edit_hscroll_slider);
}
return TRUE;
}
gint
Editor::hscroll_slider_button_release (GdkEventButton *ev)
{
if (!session) {
return TRUE;
}
gint start;
gint width;
gint end;
gint x;
gint bar_max = edit_hscroll_slider_width - 2;
jack_nframes_t new_leftmost = 0;
//cerr << "RELESAE" << endl;
if (edit_hscroll_dragging) {
// lets do a tempo redisplay now only, because it is dog slow
tempo_map_changed (Change (0));
edit_hscroll_dragging = false;
}
return TRUE;
start = (gint) floor (bar_max * ((double) leftmost_frame / session->current_end_frame()));
width = (gint) floor (bar_max * ((canvas_width * frames_per_unit) / session->current_end_frame()));
end = start + width - 1;
x = (gint) max (0.0, ev->x);
if (!edit_hscroll_dragging) {
new_leftmost = (jack_nframes_t) floor (((double) x/bar_max) * session->current_end_frame());
reposition_x_origin (new_leftmost);
}
if (edit_hscroll_dragging) {
// lets do a tempo redisplay now only, because it is dog slow
tempo_map_changed (Change (0));
edit_hscroll_dragging = false;
Gtk::Main::grab_remove (edit_hscroll_slider);
}
return TRUE;
}
gint
Editor::hscroll_slider_motion (GdkEventMotion *ev)
{
gint x, y;
GdkModifierType state;
gint bar_max = edit_hscroll_slider_width - 2;
if (!session || !edit_hscroll_dragging) {
return TRUE;
}
edit_hscroll_slider.get_window().get_pointer (x, y, state);
jack_nframes_t new_frame;
jack_nframes_t frames;
double distance;
double fract;
distance = x - edit_hscroll_drag_last;
fract = fabs (distance) / bar_max;
frames = (jack_nframes_t) floor (session->current_end_frame() * fract);
if (distance < 0) {
if (leftmost_frame < frames) {
new_frame = 0;
} else {
new_frame = leftmost_frame - frames;
}
} else {
if (leftmost_frame > max_frames - frames) {
new_frame = max_frames;
} else {
new_frame = leftmost_frame + frames;
}
}
if (new_frame != leftmost_frame) {
reposition_x_origin (new_frame);
}
edit_hscroll_drag_last = x;
return TRUE;
}
void
Editor::update_hscroller ()
{
//edit_hscroll_slider.queue_draw ();
// if (session) {
// track_canvas_scroller.get_hadjustment()->set_upper (session->current_end_frame() / frames_per_unit);
// track_canvas_scroller.get_hadjustment()->set_value (leftmost_frame/frames_per_unit);
// }
}
gint
Editor::hscroll_left_arrow_button_press (GdkEventButton *ev)
{
if (!session) {
return FALSE;
}
start_canvas_autoscroll (-1);
return TRUE;
}
gint
Editor::hscroll_right_arrow_button_press (GdkEventButton *ev)
{
if (!session) {
return FALSE;
}
start_canvas_autoscroll (1);
return TRUE;
}
gint
Editor::hscroll_left_arrow_button_release (GdkEventButton *ev)
{
if (!session) {
return FALSE;
}
stop_canvas_autoscroll ();
return TRUE;
}
gint
Editor::hscroll_right_arrow_button_release (GdkEventButton *ev)
{
if (!session) {
return FALSE;
}
stop_canvas_autoscroll ();
return TRUE;
}