/*
 * 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.
 */

#pragma once

#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::Signal<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 ();
};