crossfade_view.h

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/*
    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.

*/

#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&,
                       boost::shared_ptr<ARDOUR::Crossfade>,
                       double initial_samples_per_pixel,
                       Gdk::Color& basic_color,
                       AudioRegionView& leftview,
                       AudioRegionView& rightview);

        ~CrossfadeView ();

        boost::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__ */