CDragDropTargetFlavorHelper.h

//========================================================================================
// 
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// Owner: Dave Burnard
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// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
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// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
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#ifndef __CDragDropTargetFlavorHelper__
#define __CDragDropTargetFlavorHelper__

#include "IDragDropTargetFlavorHelper.h"

#include "IDragDropSource.h"
#include "IDragDropTarget.h"
#include "IDragDropController.h"
#include "IDataExchangeHandler.h"


//========================================================================
// Class CDragDropTargetFlavorHelper
//========================================================================
class CDragDropTargetFlavorHelper : public IDragDropTargetFlavorHelper
{
 public:
 CDragDropTargetFlavorHelper(IPMUnknown *boss);
 virtual ~CDragDropTargetFlavorHelper();
 
 virtual DragDrop::eHelperType
 GetHelperType() const;

 virtual bool16 HelperWillDoDragTracking() const;

 virtual void PrepareHelperForDrag() const;

 virtual DragDrop::TargetResponse
 CouldAcceptTypes(const IDragDropTarget*, DataObjectIterator*, const IDragDropSource*, const IDragDropController*) const = 0;

 bool16 CanHandleDragData() const {return fCanHandleDragData;}
 void SetCanHandleDragData(bool16 can) {fCanHandleDragData = can;}

 virtual bool16 DoDragEnter_PreflightDragData(IDragDropTarget*, IDragDropController*);

 virtual void DoDragEnter(IDragDropTarget*);
 virtual void DoDragWithin(IDragDropTarget*, const PMPoint& localPt);
 virtual void DoDragLeave(IDragDropTarget*);

 virtual ErrorCode ProcessDragDropCommand(IDragDropTarget*, IDragDropController*, DragDrop::eCommandType) = 0;

 DragDrop::TargetResponse
 HandleCouldAcceptTypes(const IDragDropTarget*, DataObjectIterator*, const IDragDropSource*, const IDragDropController*) const;
 
 virtual PMRect GetDragDataBounds() const; 

 protected:
 DragDrop::TargetResponse GetCachedResponse() const {return fCachedResponse;}
 
 mutable DragDrop::TargetResponse fCachedResponse;
 mutable bool16 fCanHandleDragData; 
};


#endif