crossfade_view.h

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/*
 * Copyright (C) 2005-2014 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2005 Nick Mainsbridge <mainsbridge@gmail.com>
 * Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
 * Copyright (C) 2006-2011 David Robillard <d@drobilla.net>
 * Copyright (C) 2007-2011 Carl Hetherington <carl@carlh.net>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef __gtk_ardour_crossfade_view_h__
#define __gtk_ardour_crossfade_view_h__
 
#include <vector>
#include "pbd/signals.h"
#include "ardour/crossfade.h"
 
#include "time_axis_view_item.h"
 
class RouteTimeAxisView;
class AudioRegionView;
 
namespace ArdourCanvas {
        class PolyLine;
}
 
class CrossfadeView : public TimeAxisViewItem
{
public:
        CrossfadeView (ArdourCanvas::Container*,
                       RouteTimeAxisView&,
                       std::shared_ptr<ARDOUR::Crossfade>,
                       double initial_samples_per_pixel,
                       Gdk::Color& basic_color,
                       AudioRegionView& leftview,
                       AudioRegionView& rightview);
 
        ~CrossfadeView ();
 
        std::shared_ptr<ARDOUR::Crossfade> crossfade;  // ok, let 'em have it
 
        AudioRegionView& left_view;    // and these too
        AudioRegionView& right_view;
 
        void set_heights (double, double);
 
        bool valid() const { return _valid; }
        bool visible() const { return _visible; }
        void set_valid (bool yn);
 
        static PBD::Signal1<void,CrossfadeView*> CatchDeletion;
 
        void fake_hide ();
        void hide ();
        void show ();
        void horizontal_position_changed ();
 
protected:
        void reset_width_dependent_items (double pixel_width);
 
private:
        bool _valid;
        bool _visible;
        bool _all_in_view;
        double _child_height;
 
        ArdourCanvas::PolyLine *fade_in;
        ArdourCanvas::PolyLine *fade_out;
 
        void crossfade_changed (const PBD::PropertyChange&);
        void crossfade_fades_changed ();
        void active_changed ();
        void redraw_curves ();
        void color_handler ();
};
 
#endif /* __gtk_ardour_crossfade_view_h__ */