133 lines
2.5 KiB
C++
133 lines
2.5 KiB
C++
//____________________________________________________________________________
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1996 - 1999
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//
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// File: NMTempl.h
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//
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// Contents:
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//
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// Classes:
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//
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// Functions:
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//
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// History: 12/11/1996 RaviR Created
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//____________________________________________________________________________
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//
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#ifndef NMTEMPL_H
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#define NMTEMPL_H
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//____________________________________________________________________________
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//
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// Template: XMapIterator
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//____________________________________________________________________________
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//
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template<typename _MAP, typename _KEY, typename _VALUE> class XMapIterator
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{
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public:
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typedef _MAP MAP;
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typedef _KEY KEY;
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typedef _VALUE VALUE;
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// Constructor
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inline XMapIterator(MAP& map) : m_map(map), m_pos(NULL), m_bEnd(FALSE)
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{
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Reset();
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}
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// Attributes
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inline BOOL IsEnd()
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{
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return m_bEnd;
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}
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inline operator VALUE ()
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{
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return m_value;
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}
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inline KEY& GetKey(void)
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{
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return m_key;
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}
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inline VALUE& GetValue(void)
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{
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return m_value;
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}
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// Operations
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inline void Reset()
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{
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m_bEnd = FALSE;
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m_pos = m_map.GetStartPosition();
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if (m_pos)
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m_map.GetNextAssoc(m_pos, m_key, m_value);
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else
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m_bEnd = TRUE;
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}
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inline void Advance()
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{
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ASSERT(IsEnd() == FALSE);
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if (m_pos)
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m_map.GetNextAssoc(m_pos, m_key, m_value);
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else
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m_bEnd = TRUE;
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}
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// Implementation
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private:
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VALUE m_value;
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KEY m_key;
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MAP& m_map;
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POSITION m_pos;
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BOOL m_bEnd;
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};
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HRESULT
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DataObject_GetHGLOBALData(
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IDataObject* piDataObject,
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CLIPFORMAT cfClipFormat,
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HGLOBAL* phGlobal);
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template <typename DATATYPE>
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HRESULT ExtractData(IDataObject* pDO, CLIPFORMAT cf, DATATYPE* pDATATYPE)
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{
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ASSERT(pDO != NULL);
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ASSERT(pDATATYPE!= NULL);
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if (pDO == NULL || pDATATYPE == NULL)
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return E_POINTER;
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HGLOBAL hGlobal = NULL;
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HRESULT hr = DataObject_GetHGLOBALData(pDO, cf, &hGlobal);
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if (FAILED(hr))
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return hr;
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DATATYPE* pdata = reinterpret_cast<DATATYPE*>(::GlobalLock(hGlobal));
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ASSERT(pdata != NULL);
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*pDATATYPE = *pdata;
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::GlobalUnlock(hGlobal);
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::GlobalFree(hGlobal);
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return S_OK;
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}
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#endif // NMTEMPL_H
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