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139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
// ImageDataObject.h: Impementation for IDataObject Interface to be used
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// in inserting bitmap to the RichEdit Control.
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//
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// Author : Hani Atassi (atassi@arabteam2000.com)
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//
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// How to use : Just call the static member InsertBitmap with
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// the appropriate parrameters.
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//
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// Known bugs :
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//
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//
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//////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "ImageDataObject.h"
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#ifdef _DEBUG
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#undef THIS_FILE
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static char THIS_FILE[]=__FILE__;
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#define new DEBUG_NEW
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#endif
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//////////////////////////////////////////////////////////////////////
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// Static member functions
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//////////////////////////////////////////////////////////////////////
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void CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap)
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{
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SCODE sc;
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// Get the image data object
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//
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CImageDataObject *pods = new CImageDataObject;
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LPDATAOBJECT lpDataObject;
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pods->QueryInterface(IID_IDataObject, (void **)&lpDataObject);
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pods->SetBitmap(hBitmap);
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// Get the RichEdit container site
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//
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IOleClientSite *pOleClientSite;
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pRichEditOle->GetClientSite(&pOleClientSite);
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// Initialize a Storage Object
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//
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IStorage *pStorage;
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LPLOCKBYTES lpLockBytes = NULL;
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sc = ::CreateILockBytesOnHGlobal(NULL, TRUE, &lpLockBytes);
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if (sc != S_OK)
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AfxThrowOleException(sc);
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ASSERT(lpLockBytes != NULL);
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sc = ::StgCreateDocfileOnILockBytes(lpLockBytes,
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STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, &pStorage);
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if (sc != S_OK)
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{
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VERIFY(lpLockBytes->Release() == 0);
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lpLockBytes = NULL;
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AfxThrowOleException(sc);
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}
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ASSERT(pStorage != NULL);
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// The final ole object which will be inserted in the richedit control
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//
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IOleObject *pOleObject;
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pOleObject = pods->GetOleObject(pOleClientSite, pStorage);
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// all items are "contained" -- this makes our reference to this object
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// weak -- which is needed for links to embedding silent update.
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OleSetContainedObject(pOleObject, TRUE);
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// Now Add the object to the RichEdit
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//
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REOBJECT reobject;
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ZeroMemory(&reobject, sizeof(REOBJECT));
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reobject.cbStruct = sizeof(REOBJECT);
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CLSID clsid;
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sc = pOleObject->GetUserClassID(&clsid);
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if (sc != S_OK)
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AfxThrowOleException(sc);
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reobject.clsid = clsid;
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reobject.cp = REO_CP_SELECTION;
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reobject.dvaspect = DVASPECT_CONTENT;
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reobject.poleobj = pOleObject;
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reobject.polesite = pOleClientSite;
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reobject.pstg = pStorage;
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// Insert the bitmap at the current location in the richedit control
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//
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pRichEditOle->InsertObject(&reobject);
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// Release all unnecessary interfaces
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//
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pOleObject->Release();
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pOleClientSite->Release();
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lpLockBytes->Release(); // new
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pStorage->Release();
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lpDataObject->Release();
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}
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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void CImageDataObject::SetBitmap(HBITMAP hBitmap)
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{
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ASSERT(hBitmap);
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STGMEDIUM stgm;
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stgm.tymed = TYMED_GDI; // Storage medium = HBITMAP handle
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stgm.hBitmap = hBitmap;
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stgm.pUnkForRelease = NULL; // Use ReleaseStgMedium
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FORMATETC fm;
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fm.cfFormat = CF_BITMAP; // Clipboard format = CF_BITMAP
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fm.ptd = NULL; // Target Device = Screen
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fm.dwAspect = DVASPECT_CONTENT; // Level of detail = Full content
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fm.lindex = -1; // Index = Not applicaple
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fm.tymed = TYMED_GDI; // Storage medium = HBITMAP handle
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this->SetData(&fm, &stgm, TRUE);
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}
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IOleObject *CImageDataObject::GetOleObject(IOleClientSite *pOleClientSite, IStorage *pStorage)
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{
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ASSERT(m_stgmed.hBitmap);
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SCODE sc;
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IOleObject *pOleObject;
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sc = ::OleCreateStaticFromData(this, IID_IOleObject, OLERENDER_FORMAT,
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&m_fromat, pOleClientSite, pStorage, (void **)&pOleObject);
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if (sc != S_OK)
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AfxThrowOleException(sc);
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return pOleObject;
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}
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