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  #ifndef QSIMPLEDRAG_P_H
  #define QSIMPLEDRAG_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <qpa/qplatformdrag.h>
  
  #include <QtCore/QObject>
  
  QT_BEGIN_NAMESPACE
  
  #ifndef QT_NO_DRAGANDDROP
  
  class QMouseEvent;
  class QWindow;
  class QEventLoop;
  class QDropData;
  class QShapedPixmapWindow;
  
  class Q_GUI_EXPORT QBasicDrag : public QPlatformDrag, public QObject
  {
  public:
      virtual ~QBasicDrag();
  
      virtual Qt::DropAction drag(QDrag *drag) Q_DECL_OVERRIDE;
  
      virtual bool eventFilter(QObject *o, QEvent *e) Q_DECL_OVERRIDE;
  
  protected:
      QBasicDrag();
  
      virtual void startDrag();
      virtual void cancel();
      virtual void move(const QMouseEvent *me);
      virtual void drop(const QMouseEvent *me);
      virtual void endDrag();
  
      QShapedPixmapWindow *shapedPixmapWindow() const { return m_drag_icon_window; }
      void updateCursor(Qt::DropAction action);
  
      bool canDrop() const { return m_can_drop; }
      void setCanDrop(bool c) { m_can_drop = c; }
  
      Qt::DropAction executedDropAction() const { return m_executed_drop_action; }
      void  setExecutedDropAction(Qt::DropAction da) { m_executed_drop_action = da; }
  
      QDrag *drag() const { return m_drag; }
  
  private:
      void enableEventFilter();
      void disableEventFilter();
      void restoreCursor();
      void exitDndEventLoop();
  
      bool m_restoreCursor;
      QEventLoop *m_eventLoop;
      Qt::DropAction m_executed_drop_action;
      bool m_can_drop;
      QDrag *m_drag;
      QShapedPixmapWindow *m_drag_icon_window;
  };
  
  class Q_GUI_EXPORT QSimpleDrag : public QBasicDrag
  {
  public:
      QSimpleDrag();
      virtual QMimeData *platformDropData() Q_DECL_OVERRIDE;
  
  protected:
      virtual void startDrag() Q_DECL_OVERRIDE;
      virtual void cancel() Q_DECL_OVERRIDE;
      virtual void move(const QMouseEvent *me) Q_DECL_OVERRIDE;
      virtual void drop(const QMouseEvent *me) Q_DECL_OVERRIDE;
  
  private:
      QWindow *m_current_window;
  };
  
  #endif // QT_NO_DRAGANDDROP
  
  QT_END_NAMESPACE
  
  #endif
  