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Disabling button using OnUpdate handler

Posted on 1998-01-06
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Last Modified: 2013-11-20
Is it possible to disable (via EnableWindow( FALSE ) or some other documented mechanism) a CButton control in a VC 1.52 CRecordView by using an ON_UPDATE_COMMAND_UI handler ?  I know I could probably do it via a custom DDX routine (examine the value for the field, then disable the control) but for various reasons I don't really want to write another custom DDX routine for this application (although if I have to, I will).  Thanks.
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Question by:xn12z9i
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3 Comments
 
LVL 1

Expert Comment

by:richhxb
ID: 1313497
Just use UpdateData to get the value for the field,
then enable or disable the control according to the
value using EnableWindow.


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Author Comment

by:xn12z9i
ID: 1313498
From what function/handler should I call UpdateData() ? I've already tried doing this from my ON_UPDATE_COMMAND_UI handler. Also, as this is a Recordview, I would prefer to let the framework call UpdateData() so that my recordset does not get clobbered.

I guess what I want to know is, will the following work, and if not, what is the best way to implement what I want from a single handler function ?

ON_UPDATE_COMMAND_UI(IDC_MY_BUTTON, OnUpdateMyButton1)

void CMyRecordView::OnUpdateMyButton1(CCmdUI *pCmdUI)
{
    CButton *pb = (CButton *) GetDlgItem( IDC_MY_BUTTON );

    if( pb->GetCheck() )
        pCmdUI->Enable( FALSE );
    else
        pCmdUI->Enable( TRUE );
}
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Accepted Solution

by:
WBerthin earned 100 total points
ID: 1313499
THE FOLLOWING WILL WORK TO "GRAY" THE CONTROL
      
CWnd* pButton = GetDlgItem(IDC_MY_BUTTON );
pButton->EnableWindow(FALSE);

And of course substitute TRUE for FALSE to put the
button back on.

If you have the ON_UPDATE_COMMAND_UI handler set up
right you should be OK with this.

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