/* 
 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
 *
 * 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; version 2 of the
 * License.
 * 
 * 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 St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#ifndef __MDC_CONNECTOR_H__
#define __MDC_CONNECTOR_H__

#include "mdc_common.h"
#include "base/trackable.h"

BEGIN_MDC_DECLS

class Magnet;
class CanvasItem;

class MYSQLCANVAS_PUBLIC_FUNC Connector : public base::trackable
{
public:
  Connector(CanvasItem *owner);
  virtual ~Connector();

  void set_update_handler(const boost::function<void (Connector*)> &update_handler);
  
  virtual bool try_connect(Magnet *magnet);
  virtual bool try_disconnect();
  
  virtual void connect(Magnet *magnet);
  virtual void disconnect();

  void set_draggable(bool flag);
  bool is_draggable() { return _draggable; }

  void set_tag(int tag) { _tag= tag; }
  int get_tag() { return _tag; }
  
  Magnet *get_connected_magnet() { return _magnet; }
  CanvasItem *get_connected_item();
  CanvasItem *get_owner() { return _owner; }

  MySQL::Geometry::Point get_position(const MySQL::Geometry::Point &srcpos);
  MySQL::Geometry::Point get_position();


  // callback for Magnet
  virtual void magnet_moved(Magnet *magnet);

protected:
  CanvasItem *_owner;
  Magnet *_magnet;
  int _tag;

  bool _draggable;
  
  boost::function<void (Connector*)> _update_handler;
};


END_MDC_DECLS

#endif

