Re: GTK and tasking (GNAT)

[hreba <hreba@terra.com.br>]

On 05/05/2014 04:33 AM, Dmitry A. Kazakov wrote:
> On Sun, 04 May 2014 18:32:45 -0300, hreba wrote:
>
>> I am talking about calculations that can be broken down, as in my
>> example at the beginning of this thread: I count from 1 to 10, update a
>> text box and call delay at each iteration, but the display changes only
>> after the termination of the loop.
>
> You can find an example of how to do this in GtkAda here:
>
> http://www.dmitry-kazakov.de/ada/aicwl.htm#12.6
>
> The example performs a very lengthy calculation in an independent task and
> among other updates a progress bar.
>
> The method is still the one I described.
>
> http://www.dmitry-kazakov.de/ada/gtkada_contributions.htm#1
>
> You post data (e.g. the bar position) to the main loop from where the
> action is performed.
>
> So the plotter in the example is based on this technique as well. Its
> refresh engine, which periodically updates the curves, is an Ada task that
> posts Queue_Draw to the main loop.
>
> There is no simple way of doing tasking in GUI.
>

Thanks a lot for the wealth of information.
-- 
Frank Hrebabetzky		+55 / 48 / 3235 1106
Florianopolis, Brazil