Getting a CCmdUI from a CButton

[bulgakov]

History:
Buttons on a dialog bar can not be enabled and disabled
(see KBA 152376).
The answer is to have a handler for ON UPDATE COMMAND UI
to the button

void CMainFrame::OnUpdateButton1(CCmdUI *p)
{
p->Enable(TRUE);
}

so this is great it works, now I want to disable this
button when the operator clicks on a different button,
ie

void CMainFrame::OnPlayButton()
{
//Enable the Pause button
ExecuteFile(...); // a method to play a file
}

But I can not enable the pause button ! So can I
call the OnUpdateButton1(CCmdUI *p)
method ? If so how do I get the CCmdUI pointer to the
CButton ?

Thanks.

 

[palbano]

You need to have access to the state in any way you like then use the state in the OnUpdateButton1() handler to enable/disable the button.

There may be another problem however of getting the framework to send the message when working with a dialog bar. There may be more Technical articles about this subject.

Or perhaps you can manually set it (enable/disable) in the OnPlayButton() function and also in the OnUpdateButton1() handler.

-pete

 

[bulgakov]

I am answering this myself to help anyone else who reads
this and has the same problem.

To call the CMainFrame::OnUpdateButton1(CCmdUI *p)

with the correct CCmdUI do this..

CCmdUI p;
p.m_pOther = (CWnd*)GetDlgItem(ID_OF_BUTTON);
OnUpdateButton1(&p);

The intuitive m_pOther name gave it away, and of course
the direct access to an attribute, no need for
methods in microsofts cut down version of OO
methodology.

Marcus.