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void CCheckBoxEx::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
//creation d'un DC en memoire .
CDC memDC;
memDC.CreateCompatibleDC( &dc );
CRect rcClip, rcClient;
dc.GetClipBox( &rcClip );
GetClientRect(&rcClient);
// seletionne un bitmap sur le DC en memoire
CBitmap bitmap;
bitmap.CreateCompatibleBitmap( &dc, rcClient.Width(), rcClient.Height() );
memDC.SelectObject( &bitmap );
// selectionne la region dans le dc en memoire
CRgn rgn;
rgn.CreateRectRgnIndirect( &rcClip );
memDC.SelectClipRgn(&rgn);
rgn.DeleteObject();
CClientDC clientDC(GetParent());
CRect crect;
CRect wrect;
GetClientRect(crect);
GetWindowRect(wrect);
GetParent()->ScreenToClient(wrect);
CRect rcText=crect;
// recopie du fond.
memDC.BitBlt(0, 0, rcClient.Width(), rcClient.Height(), &clientDC, wrect.left, wrect.top, SRCCOPY);
BOOL bChecked =GetCheck ();
crect.right=crect.left+13;
// dessin du check.
memDC.DrawFrameControl(crect, DFC_BUTTON,
(bChecked)? DFCS_BUTTONCHECK | DFCS_CHECKED : DFCS_BUTTONCHECK);
CString strText;
GetWindowText(strText);
rcText.OffsetRect(18,0);
memDC.SetBkMode(TRANSPARENT);
memDC.SelectObject(GetFont());
int nStyle= GetStyle();
memDC.DrawText(strText, &rcText, DT_LEFT | DT_VCENTER | DT_SINGLELINE);
// ecriture finale du bitmap.
dc.BitBlt( rcClip.left, rcClip.top, rcClip.Width(),
rcClip.Height(), &memDC, rcClip.left, rcClip.top, SRCCOPY );
} |
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