/*
    Copyright (C) 2011 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_panner_interface_h__
#define __gtk_ardour_panner_interface_h__

#include <boost/shared_ptr.hpp>
#include <gtkmm/drawingarea.h>
#include <gtkmm/label.h>

namespace ARDOUR {
	class Panner;
}

/** Parent class for some panner UI classes that contains some common code */
class PannerInterface : public Gtk::DrawingArea
{
public:
	PannerInterface (boost::shared_ptr<ARDOUR::Panner>);
	virtual ~PannerInterface ();

protected:
	virtual void set_drag_data () = 0;
	
	void show_drag_data_window ();
	void hide_drag_data_window ();
	void value_change ();
	
        bool on_enter_notify_event (GdkEventCrossing *);
        bool on_leave_notify_event (GdkEventCrossing *);
	bool on_key_release_event  (GdkEventKey *);

	boost::shared_ptr<ARDOUR::Panner> _panner;
        Gtk::Window* _drag_data_window;
        Gtk::Label*  _drag_data_label;
        bool _dragging;

private:
	bool drag_data_timeout ();
	sigc::connection _drag_data_timeout;
};

#endif