DragSource Lib for BCB(DragDrop.h)
2013年01月25日
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//---------------------------------------------------------------------------
// DragSource Lib.
// Copyright (c) 2006, 2007 by Mao yongjun
// All rights reserved
// Add "WINOLEAPI OleInitialize (LPVOID pvReserved)" before use DragDropLib on each thread
// Don't forget "WINOLEAPI OleUninitialize ()" on exit the thread
//---------------------------------------------------------------------------
#ifndef DragDropH
#define DragDropH
#include <oleidl.h>
#include <objidl.h>
#include <vector>
#include <string>
struct THDROP_Files :
std::vector<std::string>...{
void *Create_HDROP() const;
};
struct TDropResult ...{
DWORD Result;
/**//*
* DRAGDROP_S_DROP
* The OLE drag-and-drop operation was successful.
* DRAGDROP_S_CANCEL
* The OLE drag-and-drop operation was canceled.
* E_UNSPEC
* Unexpected error occurred.
*/
DWORD Effect;
/**//*
* typedef enum tagDROPEFFECT
* {
* DROPEFFECT_NONE = 0,
* DROPEFFECT_COPY = 1,
* DROPEFFECT_MOVE = 2,
* DROPEFFECT_LINK = 4,
* DROPEFFECT_SCROLL = 0x80000000
* }DROPEFFECT;
*/
};
//---------------------------------------------------------------------------
TDropResult DoDragDrop(FORMATETC *fmtetc, STGMEDIUM *stgmeds,UINT count=1,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE); //Drag fms,
TDropResult DoDragDrop(CLIPFORMAT ctFormat,DWORD tymed,void *hStorage,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE); //Drag simple type, hStorage will be freed
TDropResult DoDragDrop(char *szText,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE); //Drag Text
TDropResult DoDragDropURL(char *URL,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE|DROPEFFECT_LINK); //Drag URL
TDropResult DoDragDrop(wchar_t *wszText,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE); //Drag Unicode Text
TDropResult DoDragDrop(HBITMAP hBitmap,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE); //Drag Bitmap
TDropResult DoDragDrop(const THDROP_Files &files,
DWORD dwOKEffect=DROPEFFECT_COPY|DROPEFFECT_MOVE|DROPEFFECT_LINK); //Drag Files
HRESULT CreateDataObject (FORMATETC *fmtetc, STGMEDIUM *stgmeds, UINT count, IDataObject **ppDataObject);
HRESULT CreateEnumFormatEtc (UINT cfmt, FORMATETC *afmt, IEnumFORMATETC **ppEnumFormatEtc);
HANDLE MemToHandle (void *pMem, int nSize);
//----------------TDropSource-----------------------------------------------------------
class TDropSource
:public IDropSource
...{
private:
ULONG _iRefCount;
public:
// IUnknown members
HRESULT __stdcall QueryInterface(REFIID iid, void **ppv);
ULONG __stdcall AddRef(void) ...{ return ++_iRefCount; }
ULONG __stdcall Release(void) ...{ if(--_iRefCount==0)...{delete this; return 0;} return _iRefCount; }
// IDropSource
HRESULT __stdcall QueryContinueDrag(BOOL fEscapePressed,DWORD grfKeyState);
HRESULT __stdcall GiveFeedback(DWORD dwEffect);
//
TDropSource():_iRefCount(1)...{;}
virtual ~TDropSource() ...{;}
};
//----------------TDataObject-----------------------------------------------------------
class TDataObject : public IDataObject
...{
public:
// IUnknown members
HRESULT __stdcall QueryInterface (REFIID iid, void ** ppv);
ULONG __stdcall AddRef (void) ...{ return ++_iRefCount; }
ULONG __stdcall Release (void) ...{ if(--_iRefCount==0)...{delete this; return 0;} return _iRefCount; }
// IDataObject members
HRESULT __stdcall GetData (FORMATETC *pFormatEtc, STGMEDIUM *pStgMedium);
HRESULT __stdcall QueryGetData (FORMATETC *pFormatEtc);
HRESULT __stdcall EnumFormatEtc (DWORD dwDirection, IEnumFORMATETC **ppEnumFormatEtc);
HRESULT __stdcall GetDataHere (FORMATETC *pFormatEtc, STGMEDIUM *pmedium)...{
return DATA_E_FORMATETC;
}
HRESULT __stdcall GetCanonicalFormatEtc (FORMATETC *pFormatEct, FORMATETC *pFormatEtcOut)...{
// Apparently we have to set this field to NULL even though we don't do anything else
pFormatEtcOut->ptd = NULL;
return E_NOTIMPL;
}
HRESULT __stdcall SetData (FORMATETC *pFormatEtc, STGMEDIUM *pMedium, BOOL fRelease)...{
return E_NOTIMPL;
}
HRESULT __stdcall DAdvise (FORMATETC *pFormatEtc, DWORD advf, IAdviseSink *, DWORD *)...{
return OLE_E_ADVISENOTSUPPORTED;
}
HRESULT __stdcall DUnadvise (DWORD dwConnection)...{
return OLE_E_ADVISENOTSUPPORTED;
}
HRESULT __stdcall EnumDAdvise (IEnumSTATDATA **ppEnumAdvise)...{
return OLE_E_ADVISENOTSUPPORTED;
}
// Constructor / Destructor
TDataObject():_iRefCount(1) ...{;}
virtual ~TDataObject ()...{;}
void Add(FORMATETC *fmtetc, STGMEDIUM *stgmeds, UINT count);
void Add(CLIPFORMAT ctFormat,DWORD tymed,void *hStorage);
size_t size()...{return _pFormatEtc.size();}
bool empty()...{return _pFormatEtc.empty();}
void Clear();
void ClearAndRelease();
private:
ULONG _iRefCount;
std::vector<FORMATETC> _pFormatEtc;
std::vector<STGMEDIUM> _pStgMedium;
int LookupFormatEtc(FORMATETC *pFormatEtc);
};
//----------------TEnumFormatEtc-----------------------------------------------------------
class TEnumFormatEtc : public IEnumFORMATETC
...{
public:
// IUnknown members
HRESULT __stdcall QueryInterface (REFIID iid, void ** ppv)
...{
if((iid==IID_IUnknown)||(iid==IID_IEnumFORMATETC))
...{
*ppv=this;
AddRef();
return S_OK;
}
else
...{
*ppv=NULL;
return E_NOINTERFACE;
}
}
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