/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef NUVIE_GUI_GUI_DRAG_MANAGER_H
#define NUVIE_GUI_GUI_DRAG_MANAGER_H

#include "ultima/nuvie/gui/gui_status.h"
#include "ultima/nuvie/gui/gui_drag_area.h"

namespace Ultima {
namespace Nuvie {

// Drag Messages.
#define GUI_DRAG_OBJ 0

class Screen;

class GUI_DragManager {

protected:

	Screen *screen;

	GUI_DragArea *drag_source;
	int message;
	void *data;
	bool is_out_of_range;

public:

	GUI_DragManager(Screen *s);

	GUI_status start_drag(GUI_DragArea *src, int msg, void *d, unsigned char *icon_buf, uint16 w, uint16 h, uint8 bpp, bool out_of_range = false);
	void drop(GUI_DragArea *drag_target, int x, int y);

// let us find out where the drag originated, because we might
// need to do something different depending on where a dragged
// object is coming from.
	GUI_DragArea *get_source();

	void draw(int x, int y);
};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif