有没有在CFormView中显示jpg文件（且可自动拉伸图）

yuanl 2003-08-21 05:09:23

能不能给提供一个实例？

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yuanl 2003-11-28

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help me

yuanl 2003-09-23

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我没有办法使＊.jpg占满整个CView空间？
即：如何使*.jpg随CView的大小进行自动拉伸图。

hellolwl 2003-08-28

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void CJPGGifView::OnDraw(CDC* pDC)
{
CJPGGifDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
IPicture *pPic;
IStream *pStm;

CFileStatus fstatus;
CFile file;
LONG cb;

if (file.Open("C:\\flore.jpg",CFile::modeRead)
&& file.GetStatus("C:\\flore.jpg", fstatus)
&& ((cb = fstatus.m_size) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);

if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,
IID_IPicture,(LPVOID*)&pPic)))
{
OLE_XSIZE_HIMETRIC hmWidth;
OLE_YSIZE_HIMETRIC hmHeight;

pPic->get_Width(&hmWidth);
pPic->get_Height(&hmHeight);

double fX,fY;
fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/
((double)pDC->GetDeviceCaps(HORZSIZE)*100.0);
fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/
((double)pDC->GetDeviceCaps(VERTSIZE)*100.0);

if(FAILED(pPic->Render(*pDC,100,50,(DWORD)fX,(DWORD)fY,
0,hmHeight,hmWidth,-hmHeight,NULL)))
AfxMessageBox("Failed To Render The picture!");
pDC->TextOut(120,175,"这是一个JPG图像");
pPic->Release();
}
else
{
AfxMessageBox("Error Loading Picture From Stream!");
}
}
}
}
else
{
AfxMessageBox("Can't Open Image File!");
}

}

yuanl 2003-08-28