CListBoxDragDropTarget.h

//========================================================================================
// 
// $File$
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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 
// with the terms of the Adobe license agreement accompanying it. If you have received
// this file from a source other than Adobe, then your use, modification, or 
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// 
// Implementation of a ListBox Drag and Drop target
// 
//========================================================================================

#ifdef ID_DEPRECATED // listboxes will disappear from a future version of InDesign. Please use TreeViews instead.

#include "ShuksanID.h"
#include "DragDropID.h"

#include "IEvent.h"
#include "CDragDropTarget.h"
#include "IDragDropController.h"
#include "PMFlavorTypes.h"
#include "DataObjectIterator.h"
#include "CmdUtils.h"
#include "PMRect.h"

#include "DVAForwardDeclarations.h"

#ifdef WIDGET_BUILD
#endif

class CListBoxDragDropTarget : public CDragDropTarget
{
 public:
 CListBoxDragDropTarget(IPMUnknown *boss);
 virtual ~CListBoxDragDropTarget();

 virtual void DoDragEnter();
 virtual void DoDragWithin(const PMPoint& localPt);
 virtual void DoDragLeave();
 // Tracking the drag as it enters, drags, and leaves this target
 
 virtual DragDrop::TargetResponse
 CouldAcceptTypes(DataObjectIterator*, const IDragDropSource*, const IDragDropController*) const;
 // Can the target accept the data being dragged?
 // (Drag source is provided to determine if data should be moved, copied or linked.)

 virtual bool16 HitTest_OutsideBounds(const SysPoint&) const;
 // Override to allow drop targets to respond outside their actual bounds. 
 // (usually used for autoscrolling a target when over its scroll bars)
 // default implementation returns kFalse

 protected:
 virtual void CalculateCanInsertRange(int32 item);
 virtual bool16 CanInsertBefore(int32 item) const;
 virtual bool16 ShouldDrawInsertionGraphic() const;
 virtual int32 GetDropBeforeItemNumber() const;
 
 virtual void DrawInsertionGraphic(const PMRect& itemBounds);
 virtual void RemoveInsertionGraphic(const PMRect& itemBounds);
 bool DoDirectDrawingForTargetHilite(const dvaui::ui::UI_Node* nodeP, dvaui::drawbot::Drawbot* drawbotP);
 bool DirectDrawHilite(const dvaui::ui::UI_Node* nodeP, dvaui::drawbot::Drawbot* drawbotP);

 bool16 fLocalDrop; // true if target == source
 
 
 private:
 int32 fStartCanInsertItem;
 int32 fEndCanInsertItem;
 bool16 fInsertDrawn; // true if insert graphic is currently visible
 int32 fItemLocation; // 0 - item in middle; 1 - first item in view; 2 - last item in view
 int32 fInsertBeforeItem;
 PMRect fInsertionBounds;
 SysRect fPreviousHilite;
 int32 fInsertionPointIndex;
};


#endif