在按钮上显示位图.......

[dama2003]

我想在按钮显示位图,不知道可以吗?
我希望能打开任何一个文件夹里的BMP文件,然后显示,可以吗?

[ljzcom]

用CButtonST类就可以了，CButtonST网上可以DOWNLOAD

[lygfqy]

自画的就行
选文件就loadimage（）

[dama2003]

请教(风清扬)大哥,怎么调用Loadimage()函数呢,!~~~~

[fandh]

按钮先设有BS_OWNERDRAW风格
下面是个例子,
m_pShowButton = new CBitmapButton;
m_pShowButton->Create(NULL,
WS_EX_CLIENTEDGE|BS_OWNERDRAW,rect,this,
ID_BOTTON_SHOWBUTTON);
m_pShowButton->LoadBitmaps(IDB_BITMAP_RIGHT);
m_pShowButton->SizeToContent();
m_pShowButton->ShowWindow(SW_SHOW);

[dama2003]

我是想用打开对话框来找要显示的图片,然后在指定的按钮上显示,老有问题,不知道该怎么显示哦,我觉得应该可以的,VC很强大的,就是偶不会,郁闷中........

[dama2003]

//???????????

[flyelf]

CButtonST

[flinming]

好像要重画按钮。。。。

[Kevin1121]

你申明一个CBitmapButton btn;
btn.LoadBitmaps(IDB_BITMAP3,IDB_BITMAP2);

[kongyunzhongque]

CButton: IDC_BUTTON2 more style: Owner draw and bitmap
at .h declare HBITMAP m_hBitmap;

void COpenDlg::OnButton1()
{
CFileDialog dlg(true);
dlg.DoModal();
CString strFile =dlg.GetFileName();
m_hBitmap =(HBITMAP)LoadImage(AfxGetInstanceHandle(),
strFile,IMAGE_BITMAP,0,0,
LR_LOADFROMFILE|LR_CREATEDIBSECTION);
if(m_hBitmap ==NULL)
MessageBox("it is null !\n");
else
Invalidate();

}

void COpenDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
TRACE("COpenDlg::OnDrawItem\n");

CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
if (nIDCtl ==IDC_BUTTON2 && m_hBitmap !=NULL)
{
CBitmap* pBitmap;
int nSave;
BITMAP bitMap;
CRect rectCtrl;
double dbRatio1,dbRatio2;
int nWidth,nHeight;
int nX=0,nY=0;
//
rectCtrl.CopyRect(&lpDrawItemStruct->rcItem);
pBitmap = CBitmap::FromHandle(m_hBitmap);
pBitmap->GetBitmap(&bitMap);
//计算最后图像显示的尺寸
dbRatio1 = ((double)rectCtrl.Width())/bitMap.bmWidth;
dbRatio2 = ((double)rectCtrl.Height())/bitMap.bmHeight;
if(dbRatio1<dbRatio2)
{
nWidth = rectCtrl.Width();
nHeight = bitMap.bmHeight*dbRatio1;
nY = (rectCtrl.Height()-nHeight)/2;
}
else
{
nWidth = bitMap.bmWidth*dbRatio2;
nHeight = rectCtrl.Height();
nX = (rectCtrl.Width() - nWidth)/2;
}
//
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
CDC memDC;
memDC.CreateCompatibleDC(pDC);
nSave = memDC.SaveDC();
memDC.SelectObject(pBitmap);
pDC->StretchBlt(nX,nY,nWidth,nHeight,&memDC,0,0,bitMap.bmWidth,bitMap.bmHeight,SRCCOPY);
memDC.RestoreDC(nSave);
memDC.DeleteDC();
pDC->DeleteDC();
}
}