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livetrax/gtk2_ardour/crossfade_view.cc
Paul Davis a0663fbd27 a few more header files fixes, plus cleanup from nick_m, and the start of Action/UIManager adoption
git-svn-id: svn://localhost/trunk/ardour2@48 d708f5d6-7413-0410-9779-e7cbd77b26cf
2005-10-06 04:59:20 +00:00

264 lines
6.2 KiB
C++

/*
Copyright (C) 2003 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 <algorithm>
#include <ardour/region.h>
#include <gtkmm2ext/doi.h>
#include "canvas-simplerect.h"
#include "canvas-curve.h"
#include "crossfade_view.h"
#include "rgb_macros.h"
#include "audio_time_axis.h"
#include "public_editor.h"
#include "regionview.h"
#include "utils.h"
using namespace sigc;
using namespace ARDOUR;
using namespace Editing;
sigc::signal<void,CrossfadeView*> CrossfadeView::GoingAway;
CrossfadeView::CrossfadeView (GnomeCanvasGroup *parent,
AudioTimeAxisView &tv,
Crossfade& xf,
double spu,
Gdk::Color& basic_color,
AudioRegionView& lview,
AudioRegionView& rview)
: TimeAxisViewItem ("xf.name()", parent, tv, spu, basic_color, xf.position(),
xf.overlap_length(), TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowFrame)),
crossfade (xf),
left_view (lview),
right_view (rview)
{
_valid = true;
_visible = true;
fade_in = gnome_canvas_item_new (GNOME_CANVAS_GROUP(group),
gnome_canvas_line_get_type(),
"fill_color_rgba", color_map[cCrossfadeLine],
"width_pixels", (guint) 1,
NULL);
fade_out = gnome_canvas_item_new (GNOME_CANVAS_GROUP(group),
gnome_canvas_line_get_type(),
"fill_color_rgba", color_map[cCrossfadeLine],
"width_pixels", (guint) 1,
NULL);
set_height (get_time_axis_view().height);
/* no frame around the xfade or overlap rects */
gnome_canvas_item_set (frame, "outline_what", 0, NULL);
/* never show the vestigial frame */
gnome_canvas_item_hide (vestigial_frame);
show_vestigial = false;
gtk_object_set_data (GTK_OBJECT(group), "crossfadeview", this);
gtk_signal_connect (GTK_OBJECT(group), "event",
(GtkSignalFunc) PublicEditor::canvas_crossfade_view_event,
this);
crossfade_changed (Change (~0));
crossfade.StateChanged.connect (mem_fun(*this, &CrossfadeView::crossfade_changed));
}
CrossfadeView::~CrossfadeView ()
{
GoingAway (this) ; /* EMIT_SIGNAL */
}
std::string
CrossfadeView::get_item_name ()
{
return "xfade";
// return crossfade.name();
}
void
CrossfadeView::reset_width_dependent_items (double pixel_width)
{
TimeAxisViewItem::reset_width_dependent_items (pixel_width);
active_changed ();
if (pixel_width < 5) {
gnome_canvas_item_hide (fade_in);
gnome_canvas_item_hide (fade_out);
}
}
void
CrossfadeView::set_height (double height)
{
if (height == TimeAxisView::Smaller ||
height == TimeAxisView::Small)
TimeAxisViewItem::set_height (height - 3 );
else
TimeAxisViewItem::set_height (height - NAME_HIGHLIGHT_SIZE - 3 );
redraw_curves ();
}
void
CrossfadeView::crossfade_changed (Change what_changed)
{
bool need_redraw_curves = false;
if (what_changed & BoundsChanged) {
set_position (crossfade.position(), this);
set_duration (crossfade.overlap_length(), this);
need_redraw_curves = true;
}
if (what_changed & Crossfade::ActiveChanged) {
/* calls redraw_curves */
active_changed ();
} else if (need_redraw_curves) {
redraw_curves ();
}
}
void
CrossfadeView::redraw_curves ()
{
GnomeCanvasPoints* points;
int32_t npoints;
float* vec;
double h;
/*
At "height - 3.0" the bottom of the crossfade touches the name highlight or the bottom of the track (if the
track is either Small or Smaller.
*/
switch(get_time_axis_view().height) {
case TimeAxisView::Smaller:
case TimeAxisView::Small:
h = get_time_axis_view().height - 3.0;
break;
default:
h = get_time_axis_view().height - NAME_HIGHLIGHT_SIZE - 3.0;
}
if (h < 0) {
/* no space allocated yet */
return;
}
npoints = get_time_axis_view().editor.frame_to_pixel (crossfade.length());
npoints = std::min (gdk_screen_width(), npoints);
if (!_visible || !crossfade.active() || npoints < 3) {
gnome_canvas_item_hide (fade_in);
gnome_canvas_item_hide (fade_out);
return;
} else {
gnome_canvas_item_show (fade_in);
gnome_canvas_item_show (fade_out);
}
points = get_canvas_points ("xfade edit redraw", npoints);
vec = new float[npoints];
crossfade.fade_in().get_vector (0, crossfade.length(), vec, npoints);
for (int i = 0, pci = 0; i < npoints; ++i) {
points->coords[pci++] = i;
points->coords[pci++] = 2.0 + h - (h * vec[i]);
}
gnome_canvas_item_set (fade_in, "points", points, NULL);
crossfade.fade_out().get_vector (0, crossfade.length(), vec, npoints);
for (int i = 0, pci = 0; i < npoints; ++i) {
points->coords[pci++] = i;
points->coords[pci++] = 2.0 + h - (h * vec[i]);
}
gnome_canvas_item_set (fade_out, "points", points, NULL);
delete [] vec;
gnome_canvas_points_unref (points);
/* XXX this is ugly, but it will have to wait till Crossfades are reimplented
as regions. This puts crossfade views on top of a track, above all regions.
*/
gnome_canvas_item_raise_to_top (group);
}
void
CrossfadeView::active_changed ()
{
if (crossfade.active()) {
gnome_canvas_item_set (frame, "fill_color_rgba", color_map[cActiveCrossfade], NULL);
} else {
gnome_canvas_item_set (frame, "fill_color_rgba", color_map[cInactiveCrossfade], NULL);
}
redraw_curves ();
}
void
CrossfadeView::set_valid (bool yn)
{
_valid = yn;
}
AudioRegionView&
CrossfadeView::upper_regionview () const
{
if (left_view.region.layer() > right_view.region.layer()) {
return left_view;
} else {
return right_view;
}
}
void
CrossfadeView::show ()
{
gnome_canvas_item_show (group);
_visible = true;
}
void
CrossfadeView::hide ()
{
gnome_canvas_item_hide (group);
_visible = false;
}
void
CrossfadeView::fake_hide ()
{
gnome_canvas_item_hide (group);
}