107 lines
3 KiB
C
107 lines
3 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 2000
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//
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// File: cbsc.h
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//
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//--------------------------------------------------------------------------
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#ifndef __TASKUI_CBSC_H
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#define __TASKUI_CBSC_H
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template <DWORD dwBindFlags=BINDF_ASYNCHRONOUS|BINDF_ASYNCSTORAGE|BINDF_PULLDATA>
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class ATL_NO_VTABLE CBindStatusCallback :
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public CComObjectRoot,
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public IBindStatusCallback
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{
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private:
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BEGIN_COM_MAP(CBindStatusCallback)
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COM_INTERFACE_ENTRY(IBindStatusCallback)
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END_COM_MAP()
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STDMETHOD(OnStartBinding)(DWORD dwReserved, IBinding *pBinding)
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{
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return S_OK;
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}
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STDMETHOD(GetPriority)(LONG *pnPriority)
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{
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if (NULL == pnPriority)
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return E_POINTER;
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*pnPriority = THREAD_PRIORITY_NORMAL;
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return S_OK;
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}
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STDMETHOD(OnLowResource)(DWORD reserved)
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{
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return S_OK;
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}
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STDMETHOD(OnProgress)(ULONG ulProgress, ULONG ulProgressMax, ULONG ulStatusCode, LPCWSTR szStatusText)
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{
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return S_OK;
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}
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STDMETHOD(OnStopBinding)(HRESULT hresult, LPCWSTR szError)
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{
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return S_OK;
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}
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STDMETHOD(GetBindInfo)(DWORD *pgrfBINDF, BINDINFO *pbindInfo)
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{
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if (pbindInfo==NULL || pbindInfo->cbSize==0 || pgrfBINDF==NULL)
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return E_INVALIDARG;
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*pgrfBINDF = dwBindFlags; //BINDF_ASYNCHRONOUS | BINDF_ASYNCSTORAGE | BINDF_PULLDATA;
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ULONG cbSize = pbindInfo->cbSize; // remember incoming cbSize
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memset(pbindInfo, 0, cbSize); // zero out structure
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pbindInfo->cbSize = cbSize; // restore cbSize
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pbindInfo->dwBindVerb = BINDVERB_GET; // set verb
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return S_OK;
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}
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STDMETHOD(OnDataAvailable)(DWORD grfBSCF, DWORD dwSize, FORMATETC *pformatetc, STGMEDIUM *pstgmed)
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{
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return S_OK;
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}
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STDMETHOD(OnObjectAvailable)(REFIID riid, IUnknown *punk)
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{
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return S_OK;
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}
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public:
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static HRESULT Download(BSTR bstrURL, IStream** ppStream)
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{
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CComObject<CBindStatusCallback<dwBindFlags> > *pbsc;
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HRESULT hr = CComObject<CBindStatusCallback<dwBindFlags> >::CreateInstance(&pbsc);
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if (SUCCEEDED(hr))
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{
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CComPtr<IMoniker> spMoniker;
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hr = CreateURLMoniker(NULL, bstrURL, &spMoniker);
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if (SUCCEEDED(hr))
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{
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CComPtr<IBindCtx> spBindCtx;
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hr = CreateBindCtx(0, &spBindCtx);
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if (SUCCEEDED(hr))
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{
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hr = RegisterBindStatusCallback(spBindCtx, static_cast<IBindStatusCallback*>(pbsc), 0, 0L);
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if (SUCCEEDED(hr))
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hr = spMoniker->BindToStorage(spBindCtx, 0, IID_IStream, (void**)ppStream);
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}
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}
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}
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return hr;
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}
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};
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HRESULT BindToURL(BSTR bstrURL, IStream** ppStream)
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{
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return CBindStatusCallback<>::Download(bstrURL, ppStream);
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}
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#endif // __TASKUI_CBSC_H
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