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livetrax/gtk2_ardour/crossfade_view.cc
2006-11-28 19:19:13 +00:00

264 lines
5.9 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 "audio_region_view.h"
#include "utils.h"
#include "canvas_impl.h"
using namespace sigc;
using namespace ARDOUR;
using namespace PBD;
using namespace Editing;
using namespace Gnome;
using namespace Canvas;
sigc::signal<void,CrossfadeView*> CrossfadeView::GoingAway;
CrossfadeView::CrossfadeView (ArdourCanvas::Group *parent,
RouteTimeAxisView &tv,
Crossfade& xf,
double spu,
Gdk::Color& basic_color,
AudioRegionView& lview,
AudioRegionView& rview)
: TimeAxisViewItem ("xfade" /*xf.name()*/, *parent, tv, spu, basic_color, xf.position(),
xf.length(), TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowFrame)),
crossfade (xf),
left_view (lview),
right_view (rview)
{
_valid = true;
_visible = true;
fade_in = new Line (*group);
fade_in->property_fill_color_rgba() = color_map[cCrossfadeLine];
fade_in->property_width_pixels() = 1;
fade_out = new Line (*group);
fade_out->property_fill_color_rgba() = color_map[cCrossfadeLine];
fade_out->property_width_pixels() = 1;
set_height (get_time_axis_view().height);
/* no frame around the xfade or overlap rects */
frame->property_outline_what() = 0;
/* never show the vestigial frame */
vestigial_frame->hide();
show_vestigial = false;
group->signal_event().connect (bind (mem_fun (tv.editor, &PublicEditor::canvas_crossfade_view_event), group, this));
crossfade_changed (Change (~0));
crossfade.StateChanged.connect (mem_fun(*this, &CrossfadeView::crossfade_changed));
}
CrossfadeView::~CrossfadeView ()
{
GoingAway (this) ; /* EMIT_SIGNAL */
}
void
CrossfadeView::reset_width_dependent_items (double pixel_width)
{
TimeAxisViewItem::reset_width_dependent_items (pixel_width);
active_changed ();
if (pixel_width < 5) {
fade_in->hide();
fade_out->hide();
}
}
void
CrossfadeView::set_height (double height)
{
if (height == TimeAxisView::hSmaller ||
height == TimeAxisView::hSmall)
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.length(), this);
need_redraw_curves = true;
}
if (what_changed & Crossfade::FollowOverlapChanged) {
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 ()
{
Points* points;
int32_t npoints;
float* vec;
double h;
if (!crossfade.following_overlap()) {
/* curves should not be visible */
fade_in->hide ();
fade_out->hide ();
return;
}
/*
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.
*/
double tav_height = get_time_axis_view().height;
if (tav_height == TimeAxisView::hSmaller ||
tav_height == TimeAxisView::hSmall) {
h = tav_height - 3.0;
} else {
h = tav_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) {
fade_in->hide();
fade_out->hide();
return;
} else {
fade_in->show();
fade_out->show();
}
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) {
Art::Point &p = (*points)[pci++];
p.set_x(i);
p.set_y(2.0 + h - (h * vec[i]));
}
fade_in->property_points() = *points;
crossfade.fade_out().get_vector (0, crossfade.length(), vec, npoints);
for (int i = 0, pci = 0; i < npoints; ++i) {
Art::Point &p = (*points)[pci++];
p.set_x(i);
p.set_y(2.0 + h - (h * vec[i]));
}
fade_out->property_points() = *points;
delete [] vec;
delete 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.
*/
group->raise_to_top();
}
void
CrossfadeView::active_changed ()
{
if (crossfade.active()) {
frame->property_fill_color_rgba() = color_map[cActiveCrossfade];
} else {
frame->property_fill_color_rgba() = color_map[cInactiveCrossfade];
}
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 ()
{
group->show();
_visible = true;
}
void
CrossfadeView::hide ()
{
group->hide();
_visible = false;
}
void
CrossfadeView::fake_hide ()
{
group->hide();
}