Re: ReFreshing a Window

[Joaquim Duran <joaquimduran adtelecom es>]

En/na Dimitri Holz ha escrit:
> I use a resize() - methode to change a size of my window, but I do it in 
> a do-while-trails to see the change-effect:
>
> void MyWindow::change_size()
> {
>     int x=100, y=100;
>         do
>         {           
>             MyWindow::resize(x, y);
>             .......................................................
>             x++;
>             y++;
>         }while(x<800||y<800);       
> }
>
> but the problem is that you see only the first and the last size and I 
> can`t find a GtKmm-methode for refresh a window like    ::refresh()   ; 
> or   ::reload()    or so. How can I solve this problem?
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When a widget (including your window) is resized, the widget generates 
an event to be redrawn, so the call to 'queue_redraw()' to force the 
redraw of the window is not needed.

The problem is in your code: In a simple loop you are performing many 
resize operations. Gtk and GTKmm is working based on events, so every 
time you call to resize, an event is generated and queued, and all 
generated events are processed once the loop is finished (the control 
returns to main loop and new events are processed).

You should change the implementation of your function and use a timer, 
in which at every timer callback an update should be done. For more 
information:

http://www.gtkmm.org/docs/gtkmm-2.4/docs/tutorial/html/chapter-chapter-timeouts.html#sec-timeouts

Joaquim Duran
Thanks and Best Regards,