[Gtk-sharp-list] How to show custom window and do the computation in the background

[Maciej Pilichowski]

On Sunday 27 June 2010 17:58:44 Christopher David Howie wrote:

> The only thing you really have to worry about is if the Show() call
> happens after the Destroy() call.  But again, as you should be
> using Application.Invoke() to call Destroy(), the dialog cannot be
> destroyed until it is shown, since it is shown before control
> returns to the GLib main loop.
>
> Make sense?

Yes, but with the shift I described not such worry:

public void UpdateCorpusInfo()
{
	var dlg  = new ProgressDialog("My title");
	var thread = new Thread (new ParameterizedThreadStart 
			(doUpdateCorpusInfo));
	thread.Start(dlg);
}

private void doUpdateCorpusInfo(object _arg)
{
	var dlg = (ProgressDialog)_arg;

	try
	{
		Gtk.Application.Invoke (delegate{ dlg.Show(); });
		
		// loading data and refreshing GUI (via Invoke)

	}
	finally
	{
		if (dlg!=null)
			Gtk.Application.Invoke (delegate{ dlg.Destroy();});
	}
}

> I thought it already had an example of this... or maybe it was
> removed. I'm not sure.  But I do recall reading such an example on
> the Mono website a while ago.

There are examples, but all scattered all over the page, there is no 
section (task oriented). So it was (for me at least) get the big 
picture.

Cheers,