Re: Print Preview Behavior in an MFC app
Anthony,
This looks like quite an easy fix. I am going to give it a try. The only
concern seems, like you said, IsFrameWnd which is only relevant when called
by GetParentFrame. I believe I have a few GetParentFrame calls, but I usually
put a safeguard with a IsKindOf call to verify that the frame returned is
indeed CMDIChildFrame.
Thanks,
Damir
"Anthony Wieser" wrote:
I found a partial old solution on CodeGuru, and followed up a lead from one
of the commenters
see:
<http://www.codeguru.com/cpp/w-d/doc_view/printing/comments.php/c3263/?thread=41430>
Now, what I ended up doing was in my CMDIChildDerived class I added a member
m_bPrintPreviewFrameHack.
and added this change of implmentation for is frame wnd.
BOOL CMDIChildDerived::IsFrameWnd() const
{
return m_bPrintPreviewFrameHack ? FALSE : CMDIChildWnd::IsFrameWnd();
}
Then in my view class, I handle OnFilePrintPreview, where I get my parent
(the CMDIChildDerived class), and set it's hack flag, and then call the
CView::OnFilePrintPreview implementation.
My first try was to immediately set the flag back as the commenter suggests,
but that caused an assertion failure.
So, I decided to try overriding CView::OnEndPrintPreview, and setting it
back there, after calling the default.
The net effect is that while my program is in preview mode, I claim my
window isn't a frame wnd.
Obviously this will break if for whatever reason my code were to call
GetParentFrame inside print preview, but I don't do this in my code.
Maybe this will work for you too.
Anthony Wieser
Wieser Software Ltd
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