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90 lines
2.8 KiB
90 lines
2.8 KiB
/***************************************************************************\
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*
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* File: DragDrop.h
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*
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* Description:
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* DragDrop.h defines drag and drop operations
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*
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*
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* History:
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* 7/31/2000: JStall: Created
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*
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* Copyright (C) 2000 by Microsoft Corporation. All rights reserved.
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*
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\***************************************************************************/
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#if !defined(CORE__OldDragDrop_h__INCLUDED)
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#define CORE__OldDragDrop_h__INCLUDED
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#pragma once
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#include "OldExtension.h"
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class OldTargetLock;
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class OldDropTarget :
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public OldExtension,
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public IDropTarget
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{
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protected:
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inline OldDropTarget();
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~OldDropTarget();
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public:
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static HRESULT Build(HGADGET hgadRoot, HWND hwnd, OldDropTarget ** ppdt);
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// IDropTarget
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public:
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STDMETHOD(DragEnter)(IDataObject * pdoSrc, DWORD grfKeyState, POINTL ptDesktopPxl, DWORD * pdwEffect);
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STDMETHOD(DragOver)(DWORD grfKeyState, POINTL ptDesktopPxl, DWORD * pdwEffect);
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STDMETHOD(DragLeave)();
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STDMETHOD(Drop)(IDataObject * pdoSrc, DWORD grfKeyState, POINTL ptDesktopPxl, DWORD * pdwEffect);
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// Operations
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public:
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// Implementation
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protected:
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inline BOOL HasSource() const;
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inline BOOL HasTarget() const;
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HRESULT xwDragScan(POINTL ptDesktopPxl, DWORD * pdwEffect, POINT * pptClientPxl);
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HRESULT xwUpdateTarget(POINT ptContainerPxl, DWORD * pdwEffect, POINT * pptClientPxl);
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HRESULT xwUpdateTarget(HGADGET hgadFound, DWORD * pdwEffect, POINT * pptClientPxl);
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HRESULT xwDragEnter(POINT * pptClientPxl, DWORD * pdwEffect);
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void xwDragLeave();
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virtual void OnDestroyListener();
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virtual void OnDestroySubject();
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// Data
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protected:
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static const IID * s_rgpIID[];
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IDropTarget *
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m_pdtCur; // Current Gadget OldDropTarget
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IDataObject *
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m_pdoSrc; // Source's data object
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HWND m_hwnd; // Containing HWND
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DWORD m_grfLastKeyState; // Last key state
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POINT m_ptLastContainerPxl; // Last container pixel
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HGADGET m_hgadDrop; // Current OldDropTarget
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static PRID s_pridListen; // PRID for OldDropTarget
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friend class OldTargetLock;
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};
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class OldTargetLock
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{
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public:
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inline OldTargetLock();
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inline ~OldTargetLock();
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BOOL Lock(OldDropTarget * p, DWORD * pdwEffect, BOOL fAddRef = TRUE);
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protected:
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IUnknown * m_punk;
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BOOL m_fAddRef;
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};
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#include "OldDragDrop.inl"
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#endif // CORE__OldDragDrop_h__INCLUDED
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