(RESOLVED) Copy to clipboard

Hello,

I need to copy a chart image (rendered via CXTPChartControl) to the Windows clipboard.

I tried deriving from CXTPChartControl and adding a method that copies the contents of the CBitmap cache object (m_bmpCache member) to the clipboard, but it does not work. Here's what I'm trying to do (stripped of error checking for brevity):

VERIFY(OpenClipboard());
VERIFY(EmptyClipboard());
VERIFY(SetClipboardData(CF_BITMAP, m_bmpCache.GetSafeHandle()));
CloseClipboard();

None of these function calls fail, but clipboard contents are not valid. Perhaps CBitmap cache object is not safe to use for this purpose?

Thanks for the tip, Oleg. Working fine now.  :-)

Hi,

Here's the code I'm currently using for this purpose.

void CDFDChartControl::CopyToClipboard()
{
    BITMAP bmpInfo;
    m_bmpCache.GetBitmap(&bmpInfo);

    CBitmap bitmap;
    CClientDC dcClient(AfxGetMainWnd());

    CDC dcDest;
    dcDest.CreateCompatibleDC(&dcClient);

    CDC dcSource;
    dcSource.CreateCompatibleDC(&dcClient);

    HBITMAP oldhBitmap = (HBITMAP)dcSource.SelectObject((HBITMAP)m_bmpCache);

    bitmap.CreateCompatibleBitmap(&dcClient, bmpInfo.bmWidth, bmpInfo.bmHeight);

    CBitmap* pOldBitmap = dcDest.SelectObject(&bitmap);

    ::BitBlt(dcDest, 0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight, dcSource, 0, 0, SRCCOPY);

    dcSource.SelectObject(oldhBitmap);
    dcDest.SelectObject(pOldBitmap);

    VERIFY(::OpenClipboard(AfxGetMainWnd()->m_hWnd));
    VERIFY(::EmptyClipboard());
    VERIFY(::SetClipboardData(CF_BITMAP, bitmap.Detach()));
    ::CloseClipboard();
}

When pasting the image into Paint, it tells me:

It seems CClientDC is the key. This does not work: