#ifndef __cpBaseQtApplication__Pipeline__EventFilter__h__
#define __cpBaseQtApplication__Pipeline__EventFilter__h__

#include <cpBaseQtApplication_Export.h>
#include <QObject>
#include <QPointF>

class QGraphicsScene;
class QGraphicsSceneMouseEvent;
class QGraphicsItem;
class QGraphicsSceneContextMenuEvent;
class QGraphicsSceneDragDropEvent;
class QGraphicsSceneHelpEvent;
class QGraphicsSceneHoverEvent;
class QGraphicsSceneMouseEvent;
class QGraphicsSceneMoveEvent;
class QGraphicsSceneResizeEvent;
class QGraphicsSceneWheelEvent;

// -------------------------------------------------------------------------
#define cpBaseQtApplicationPipelineEventFilterCallbackDCL( E )  \
  void _##E##_cbk( QGraphicsScene##E##Event* e );

namespace cpBaseQtApplication
{
  namespace Pipeline
  {
    class Canvas;

    /**
     */
    class cpBaseQtApplication_EXPORT EventFilter
      : public QObject
    {
      Q_OBJECT;

    public:
      typedef EventFilter  Self;
      typedef QObject Superclass;

    public:
      explicit EventFilter( QObject* parent = 0 );
      virtual ~EventFilter( );

      Canvas* canvas( );
      const Canvas* canvas( ) const;
      void setCanvas( Canvas* c );

      void install( QGraphicsScene* s );
      bool eventFilter( QObject* o, QEvent* e );

    private:
      QGraphicsItem* itemAt( const QPointF& pos );

    protected:
      typedef QGraphicsSceneDragDropEvent QGraphicsSceneDragEnterEvent;
      typedef QGraphicsSceneDragDropEvent QGraphicsSceneDragLeaveEvent;
      typedef QGraphicsSceneDragDropEvent QGraphicsSceneDragMoveEvent;
      typedef QGraphicsSceneDragDropEvent QGraphicsSceneDropEvent;
      typedef QGraphicsSceneHoverEvent    QGraphicsSceneHoverEnterEvent;
      typedef QGraphicsSceneHoverEvent    QGraphicsSceneHoverMoveEvent;
      typedef QGraphicsSceneHoverEvent    QGraphicsSceneHoverLeaveEvent;
      typedef QGraphicsSceneMouseEvent    QGraphicsSceneMouseDoubleClickEvent;
      typedef QGraphicsSceneMouseEvent    QGraphicsSceneMouseMoveEvent;
      typedef QGraphicsSceneMouseEvent    QGraphicsSceneMousePressEvent;
      typedef QGraphicsSceneMouseEvent    QGraphicsSceneMouseReleaseEvent;

      cpBaseQtApplicationPipelineEventFilterCallbackDCL( ContextMenu );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( DragEnter );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( DragLeave );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( DragMove );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( Drop );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( Help );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( HoverEnter );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( HoverLeave );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( HoverMove );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( MouseDoubleClick );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( MouseMove );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( MousePress );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( MouseRelease );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( Move );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( Resize );
      cpBaseQtApplicationPipelineEventFilterCallbackDCL( Wheel );

    private:
      QGraphicsScene* m_Scene;
      Canvas*         m_Canvas;
    };

  } // ecapseman

} // ecapseman

#endif // __cpBaseQtApplication__Pipeline__EventFilter__h__

// eof - $RCSfile$