ardour/gtk2_ardour/crossfade_view.cc
Carl Hetherington 8934ff7867 Reintroduce crossfade views for tracks in stacked region mode.
git-svn-id: svn://localhost/ardour2/branches/3.0@5594 d708f5d6-7413-0410-9779-e7cbd77b26cf
2009-08-26 01:49:08 +00:00

267 lines
6.0 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.
*/
#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"
#include "ardour_ui.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,
boost::shared_ptr<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(), false, 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() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
fade_in->property_width_pixels() = 1;
fade_out = new Line (*group);
fade_out->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
fade_out->property_width_pixels() = 1;
set_height (get_time_axis_view().current_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));
ColorsChanged.connect (mem_fun (*this, &CrossfadeView::color_handler));
}
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)
{
double h = 0;
if (height <= TimeAxisView::hSmaller) {
h = height - 3;
} else {
h = height - NAME_HIGHLIGHT_SIZE - 3;
}
TimeAxisViewItem::set_height (h);
_height = h;
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);
/* set_duration will call reset_width_dependent_items which in turn will call redraw_curves via active_changed,
so no need for us to call it */
need_redraw_curves = false;
}
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;
if (!crossfade->following_overlap()) {
/* curves should not be visible */
fade_in->hide ();
fade_out->hide ();
return;
}
if (_height < 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().curve().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 + _height - (_height * vec[i]));
}
fade_in->property_points() = *points;
crossfade->fade_out().curve().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 + _height - (_height * 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() = ARDOUR_UI::config()->canvasvar_ActiveCrossfade.get();
} else {
frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_InactiveCrossfade.get();
}
redraw_curves ();
}
void
CrossfadeView::color_handler ()
{
active_changed ();
}
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();
}