Re: refreshing a drawing area when a spinbutton is used.

[TORRI Vincent <Vincent Torri math u-bordeaux fr>]

On Thu, 28 Nov 2002, Chris Garrett wrote:

> Hi,
>
> I have created a GtkWindow, with a horizontal box in it.  In the first cell 
> of the box, there is a drawing area containing one pixbuf.  In the second 
> cell there is a spinbutton.
>
> The pixbuf is to be used as a brush (This window is a preview of the brush), 
> the size of which is dictated by the spinbutton.
>
> I have successfully connected a signal to the spin button so that the brush 
> size is changed and the pixbuf is redrawn appropriately.  However, I cannot 
> seem to get the drawing area to refresh.
>
> The expose event on the drawing area is working fine - I can move the window 
> behind another, and when I bring it back to the front, the new brush is 
> shown.  I need it to do this as soon as a value is changed on the 
> spinbutton, however.
>
> How do I get the spinbutton to generate an expose event or tell the drawing 
> area to refresh itself?

you can try 

void gtk_widget_queue_draw_area (GtkWidget *widget, gint x, gint y, gint 
width, gint height);

to force the "expose-event" to be emitted.

regards

Vincent TORRI

> Best regards,
>
> Chris.
>
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-- 
TORRI Vincent
Mathematiques Appliquees Bordeaux                                                
Institut de Mathematiques                                                       
Universite Bordeaux 1                                                           
351 cours de la liberation                                                      
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