/* 
 * 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_GROUP_H_
#define _MDC_GROUP_H_

#include "mdc_layouter.h"

BEGIN_MDC_DECLS

class Layer;
  
class MYSQLCANVAS_PUBLIC_FUNC Group : public Layouter {
public:
  Group(Layer *layer);
  virtual ~Group();
  
  virtual void dissolve();

  virtual void add(CanvasItem *item);
  virtual void remove(CanvasItem *item);

  bool has_item(CanvasItem *item);
  std::list<CanvasItem*> &get_contents() { return _contents; };
  bool empty() const { return _contents.empty(); };

  virtual void foreach(const boost::function<void (CanvasItem*)> &slot);

  void freeze();
  void thaw();

  CanvasItem *get_direct_subitem_at(const MySQL::Geometry::Point &point);
  virtual CanvasItem *get_other_item_at(const MySQL::Geometry::Point &point, CanvasItem *item);
  virtual CanvasItem *get_item_at(const MySQL::Geometry::Point &point);  
  
  virtual void move_item(CanvasItem *child_item, const MySQL::Geometry::Point &pos);
  
  virtual void raise_item(CanvasItem *item, CanvasItem *above= 0);
  virtual void lower_item(CanvasItem *item);
  
  virtual void move_to(const MySQL::Geometry::Point &point);

  virtual void set_selected(bool flag);
    
  virtual void repaint(const MySQL::Geometry::Rect &clipArea, bool direct);

protected:
  struct ItemInfo
  {
    boost::signals2::connection connection;
  };
    
  // front of list is top stack
  std::list<CanvasItem*> _contents;

  std::map<CanvasItem*, ItemInfo> _content_info;
  int _freeze_bounds_updates;
#ifdef no_group_activate
  bool _activated;
#endif

  virtual void update_bounds();
  
  void focus_changed(bool f, CanvasItem *item);
#ifdef no_group_activate
  void activate_group(bool flag);
#endif
};

END_MDC_DECLS

#endif /* _MDC_GROUP_H_ */
