Re: stop a procedure execution in GTK

[Roland Smith <rsmith xs4all nl>]

On Mon,  6 Jan 2003 03:00:43 +0100
447158@celes.unizar.es wrote:

> Hi,
> 
>   I'm programming an application using GTK+1.2.  I have to execute a procedure
> (for instance as a callback when clicking on a "start" button) and then I'd
> like to be able to stop it whenever the user gets bored (for instance by
> having another button "stop").  However I suppose that if a callback procedure
> is executed it cannot stop and of course it would not allow the application to
> catch new events till it's finished, or yes?

If it can take long enough for the user to get bored, it should _not_ be a
callback. Callbacks are supposed to run and return quickly.

If you want to do a timeconsuming procedure, chop the work up in littel pieces
and do a small piece of the work in a timeout function.

You can then also do things like update a status-bur at the end of each timeout
run, and have a global variable (set by the stop button) that stops the timeout.

Roland
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