请问在RichEdit里面通过IDataObject接口插入的图片怎么动态修改？

[luoxiangdong]

请问在RichEdit里面通过IDataObject接口插入的图片怎么动态修改？

图片是插入方法：

CImageDataObject* CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap,DWORD index,long iPos)
{

if(!hBitmap)return NULL;

SCODE sc;

// Get the image data object
//
CImageDataObject *pods = new CImageDataObject;
LPDATAOBJECT lpDataObject;
pods->QueryInterface(IID_IDataObject, (void **)&lpDataObject);
pods->SetBitmap(hBitmap);

// Get the RichEdit container site
//
IOleClientSite *pOleClientSite;
pRichEditOle->GetClientSite(&pOleClientSite);

// Initialize a Storage Object
//
IStorage *pStorage;

LPLOCKBYTES lpLockBytes = NULL;
sc = ::CreateILockBytesOnHGlobal(NULL, TRUE, &lpLockBytes);
if (sc != S_OK)
AfxThrowOleException(sc);
ASSERT(lpLockBytes != NULL);

sc = ::StgCreateDocfileOnILockBytes(lpLockBytes,
STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, &pStorage);
if (sc != S_OK)
{
VERIFY(lpLockBytes->Release() == 0);
lpLockBytes = NULL;
AfxThrowOleException(sc);
}
ASSERT(pStorage != NULL);

// The final ole object which will be inserted in the richedit control
//
IOleObject *pOleObject;
pOleObject = pods->GetOleObject(pOleClientSite, pStorage);

// all items are "contained" -- this makes our reference to this object
// weak -- which is needed for links to embedding silent update.
OleSetContainedObject(pOleObject, TRUE);

// Now Add the object to the RichEdit
//
REOBJECT reobject;
ZeroMemory(&reobject, sizeof(REOBJECT));
reobject.cbStruct = sizeof(REOBJECT);

CLSID clsid;
sc = pOleObject->GetUserClassID(&clsid);
if (sc != S_OK)
AfxThrowOleException(sc);

reobject.clsid = clsid;
reobject.cp =iPos;// REO_CP_SELECTION;
reobject.dvaspect = DVASPECT_CONTENT;
reobject.poleobj = pOleObject;
reobject.polesite = pOleClientSite;
reobject.pstg = pStorage;
reobject.dwUser=index;

// Insert the bitmap at the current location in the richedit control
//
pRichEditOle->InsertObject(&reobject);

// Release all unnecessary interfaces
//
pOleObject->Release();
pOleClientSite->Release();
pStorage->Release();
lpDataObject->Release();

return pods;
}

现在不知道怎样修改已经插入的图片，也就是重新绘制它

[luoxiangdong]

在运行时已经通过以下办法取得了对象：

REOBJECT obj;
ZeroMemory(&obj, sizeof(REOBJECT));
obj.cbStruct = sizeof(REOBJECT);
obj.cp=iPos;
m_pRichEditOleMain->GetObject(REO_IOB_USE_CP,&obj,REO_GETOBJ_POLEOBJ);

功过跟踪发现这时：obj.clsid显示为 设备独立位图，就是不知道怎样去重新绘制它

[luoxiangdong]

自己顶一下

[蒋晟]

http://www.blogcn.com/user3/jiangsheng/blog/1319738.html

[luoxiangdong]

问题是插入后，我要重新绘制它，怎么办呢？

[蒋晟]

重新设置cache的BMP

[luoxiangdong]

那以前的怎样释放？会不会有内存泄露？因为这个修改是很频繁的，是要实现类似MSN传输文件时的进度条效果的

[蒋晟]

那你还是写个基于进度条的ActiveX控件把

[luoxiangdong]

老大，ActiveX控件好了，但是怎样插入到richedit中去啊，我参照
http://community.csdn.net/Expert/topic/3334/3334209.xml?temp=.8609888

但是我把控件引入后，没有CreateDispatch方法啊

[蒋晟]

Create之后通过CWnd::GetControlUnknown查询IOleObject接口

[luoxiangdong]

谢谢，已经成功插入了，但是刷新好象有问题

[luoxiangdong]

好象必须点一下才会刷新一次

[luoxiangdong]

问题还没有解决，没法取得插入控件的Rect