[Gtk-sharp-list] How do I keep main window from closing?

[bdubu]

I have a TextView on my main window.  I don't want to be able to close the
main window if the text in this TextView has been modified but not yet saved
to disk.  I realize I can check the control's Buffer.Modified property and
that this should likely be done in the main windows's OnDeleteEvent handler
but I don't know how to make this work.  I took a WAG and tried this...

	protected void OnDeleteEvent (object sender, DeleteEventArgs a)
	{
		MessageDialog WarningMesgDlg = new MessageDialog (this, 
		DialogFlags.DestroyWithParent, MessageType.Warning, 
		ButtonsType.YesNo, "Abandon changes?");

		try
		{
			if ((!docTextView.Buffer.Modified) || (WarningMesgDlg.Run() == (int)
ResponseType.Yes))
			{
				Application.Quit ();
				a.RetVal = true;
			}
		}
		finally
		{
			WarningMesgDlg.Destroy();
		}
	}

... but the main window closes even though the Modified property is true and
I answer "no" to the dialog's question, "Abandon changes?".  Can someone
shed some light on how I should go about this?  Thanks!


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