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SaveModified in dialog based app.

Posted on 1998-09-22
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Last Modified: 2013-11-19
I want to implement something like the savemodified function
in a dialog based application (so no document available). Does anybody how to do this ?

Thanks in advance
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Question by:dataman
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3 Comments
 
LVL 3

Accepted Solution

by:
plaroche earned 280 total points
ID: 1322412
This can only be done manually, you will need to check for any change in your dialog, wether it'd be EN_CHANGE from CEdit or anything else from your listboxes, combos, etc...

You can then flag a boolean member variable.

A "cute" alternative is to diable your OK button and leave the cancel button enabled. Then when a change is made enable the OK button, works much like the APPLY button in a property page.
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Author Comment

by:dataman
ID: 1322413
I have still one question. What if I youse the Alt-F4 key to terminate the program.
How can I catch this.
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Expert Comment

by:plaroche
ID: 1322414
void CDialogDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
      if ((nID & 0xFFF0) == IDM_ABOUTBOX)
      {
            CAboutDlg dlgAbout;
            dlgAbout.DoModal();
      }
    else if( (nID & 0xFFF0) == SC_CLOSE ) {
        int i =15;
        // Do your stuff
    }
      else
      {
            CDialog::OnSysCommand(nID, lParam);
      }
}

OnSysCommand is automatically inserted in your dialog application to handle the about menu added to the system menu. In that same call you can trap SC_CLOSE and if you don't call the base class, like I've done here your dialog won't close.

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