Re: Forcing size_allocate?

[The Surprises <thesurprises1 attbi com>]

This won't show correct values until a size_allocate event occurs.  This
is what I do inside my draw routine which gets called during a
size_allocate event.  Before the size_allocate event, both width and
height are set to 1.

On Wed, Oct 09, 2002 at 08:49:40AM -0400, Owen Taylor wrote:
> 
> Paul Davis <pbd op net> writes:
> 
> > >I have a gnome_canvas packed into a vbox.  All drawing in the canvas is
> > >connected to a size_allocate event because I need to know the width and
> > >height of the area before drawing.  
> > 
> > don't do this. a size allocate will always be followed by an expose
> > event. all drawing must be done from the expose event handler, always.
> > just store the width and height in the size allocate handler for later
> > use. if for some reason, the expose event is really missing, use
> > gtk_widget_queue_draw() to cause one to occur "soon".
> 
> Note also that you can simply get the current width and height
> of the canvas with:
> 
>  canvas->allocation.width
>  canvas->allocation.height
> 
> Regards,
>                                         Owen
>  
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