Re: Clickable images on a dialog

From:

paul@paullee.com

Newsgroups:

microsoft.public.vc.mfc

Date:

7 Jun 2006 09:35:39 -0700

Message-ID:

<1149698139.758303.299500@g10g2000cwb.googlegroups.com>

Alright, heres the code: IDC_DETECTION_ZONE is the ID of the image -
hopefully the rest is self explanatory- the image is going to be white
btw.

Shame it doesn't work! btw, do I need to call OnPaint in the dialog
initialisation routine?
I didn't think you had to (I didn't in this case)

void CLogoDetectConfigure::OnPaint()
{
    CWnd *pCanvas = GetDlgItem( IDC_DETECTION_ZONE );

    CPaintDC dc( pCanvas ); // device context for painting

    //Create a memory dc
    CDC MemDC;
    MemDC.CreateCompatibleDC(&dc);

    CRect image_location;
    pCanvas->GetClientRect(&image_location);

    //create a memory bitmap, and initialize it to all white
    CBitmap MemBmp;
    MemBmp.CreateCompatibleBitmap(&dc,100,100);
    CBitmap *pOldMemBmp = MemDC.SelectObject(&MemBmp);

    MemDC.FillSolidRect(image_location.left, image_location.top,
image_location.Width(), image_location.Height() ,RGB(255,255,255));

    //create a dc to hold the original bitmap
    CDC BmpDC;

    BmpDC.CreateCompatibleDC(&dc);

    CBitmap Bmp;

    CBitmap *pOldBmp = BmpDC.SelectObject(&Bmp);

    MemDC.BitBlt(image_location.left, image_location.top,
image_location.Width(), image_location.Height(), &BmpDC,14,14,SRCCOPY);
    BmpDC.SelectObject(&pOldBmp);
    MemDC.SelectObject(pOldMemBmp);

    // Do not call CDialog::OnPaint() for painting messages
}