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119 lines
2.4 KiB
119 lines
2.4 KiB
#pragma once
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class CTestDropTarget :public IDropTarget
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{
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public:
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CTestDropTarget()
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{
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nRef = 0;
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}
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virtual ~CTestDropTarget() {}
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//////////////////////////////////////////////////////////////////////////
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// IUnknown
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(
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/* [in] */ REFIID riid,
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/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject)
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{
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HRESULT hr = S_FALSE;
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if (riid == __uuidof(IUnknown))
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*ppvObject = (IUnknown*)this, hr = S_OK;
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else if (riid == __uuidof(IDropTarget))
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*ppvObject = (IDropTarget*)this, hr = S_OK;
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if (SUCCEEDED(hr)) AddRef();
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return hr;
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}
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virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++nRef; }
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virtual ULONG STDMETHODCALLTYPE Release(void) {
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ULONG uRet = --nRef;
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if (uRet == 0) delete this;
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return uRet;
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}
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//////////////////////////////////////////////////////////////////////////
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// IDropTarget
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virtual HRESULT STDMETHODCALLTYPE DragEnter(
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/* [unique][in] */ IDataObject *pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD *pdwEffect)
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{
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*pdwEffect = DROPEFFECT_LINK;
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE DragOver(
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD *pdwEffect)
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{
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*pdwEffect = DROPEFFECT_LINK;
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE DragLeave(void)
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{
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return S_OK;
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}
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protected:
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int nRef;
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};
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class CTestDropTarget1 : public CTestDropTarget
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{
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protected:
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SWindow *m_pEdit;
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public:
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CTestDropTarget1(SWindow *pEdit) :m_pEdit(pEdit)
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{
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if (m_pEdit) m_pEdit->AddRef();
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}
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~CTestDropTarget1()
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{
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if (m_pEdit) m_pEdit->Release();
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}
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public:
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virtual HRESULT STDMETHODCALLTYPE Drop(
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/* [unique][in] */ IDataObject *pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD *pdwEffect)
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{
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FORMATETC format =
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{
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CF_HDROP, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL
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};
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STGMEDIUM medium;
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if (FAILED(pDataObj->GetData(&format, &medium)))
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{
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return S_FALSE;
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}
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HDROP hdrop = static_cast<HDROP>(GlobalLock(medium.hGlobal));
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if (!hdrop)
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{
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return S_FALSE;
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}
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bool success = false;
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TCHAR filename[MAX_PATH];
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success = !!DragQueryFile(hdrop, 0, filename, MAX_PATH);
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DragFinish(hdrop);
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GlobalUnlock(medium.hGlobal);
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if (success && m_pEdit)
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{
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m_pEdit->SetWindowText(filename);
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}
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*pdwEffect = DROPEFFECT_LINK;
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return S_OK;
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}
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};
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