Re: Progress bar cancellation

[Attilio Fiandrotti <fiandro@tiscalinet.it>]

Colin Watson wrote:
> On Mon, Jan 16, 2006 at 09:47:23PM +0100, Attilio Fiandrotti wrote:
>
> > Today i've tried to implement the cancel button for the progressbar in 
> > the GTK frontend: as GTK is an event driven toolkit (differently from 
> > the NEWT toolkit) some thinking is needed on how to manage user's input 
> > and calls from cdebconf clients.
>
>
> You can't process the cancel button entirely asynchronously anyway,
> since the only point at which you get to communicate the fact that the
> user cancelled back to the confmodule is when a PROGRESS SET/STEP/INFO
> command is given.

I was thinking to asynchronously handling the "clicked" GtkSignal via a 
thread that, when the signal is received, sets a flags to "TRUE".
When gtk_progress_xxx() runs, before returning, the value of the flag is 
checked: in the case it's FALSE, then DC_OK is returned; else, if the 
flag was previously set to true, then the flag is resetted to FALSE and 
DC_GOBACK is returned.
Does this sound correct to you?

ciao

Attilio