berryIDropTargetListener.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
 
#ifndef BERRYIDROPTARGETLISTENER_H
#define BERRYIDROPTARGETLISTENER_H
 
#include <org_blueberry_ui_qt_Export.h>
 
#include "berryMessage.h"
 
class QDragEnterEvent;
class QDragLeaveEvent;
class QDragMoveEvent;
class QDropEvent;
 
namespace berry {
 
struct BERRY_UI_QT IDropTargetListener
{
 
  virtual ~IDropTargetListener();
 
  struct Events {
 
    enum Type {
      NONE  = 0x00000000,
      ENTER = 0x00000001,
      LEAVE = 0x00000002,
      MOVE  = 0x00000004,
      DROP  = 0x00000008,
 
      ALL   = 0xffffffff
    };
 
    Q_DECLARE_FLAGS(Types, Type)
 
    typedef Message1<QDragEnterEvent*> DragEnterEventType;
    typedef Message1<QDragLeaveEvent*> DragLeaveEventType;
    typedef Message1<QDragMoveEvent*> DragMoveEventType;
    typedef Message1<QDropEvent*> DropEventType;
 
    DragEnterEventType dragEnter;
    DragLeaveEventType dragLeave;
    DragMoveEventType dragMove;
    DropEventType drop;
 
    void AddListener(IDropTargetListener* listener);
    void RemoveListener(IDropTargetListener* listener);
 
  private:
    typedef MessageDelegate1<IDropTargetListener, QDragEnterEvent*> DragEnterDelegate;
    typedef MessageDelegate1<IDropTargetListener, QDragLeaveEvent*> DragLeaveDelegate;
    typedef MessageDelegate1<IDropTargetListener, QDragMoveEvent*> DragMoveDelegate;
    typedef MessageDelegate1<IDropTargetListener, QDropEvent*> DropDelegate;
  };
 
  virtual Events::Types GetDropTargetEventTypes() const = 0;
 
  virtual void DragEnterEvent(QDragEnterEvent* /*event*/) {}
  virtual void DragLeaveEvent(QDragLeaveEvent* /*event*/) {}
  virtual void DragMoveEvent(QDragMoveEvent* /*event*/) {}
  virtual void DropEvent(QDropEvent* /*event*/) {}
 
};
 
}
 
Q_DECLARE_OPERATORS_FOR_FLAGS(berry::IDropTargetListener::Events::Types)
 
#endif // BERRYIDROPTARGETLISTENER_H