Re: Change viewport size requisition?

[Jeff Garzik <jgarzik pobox com>]

Owen Taylor wrote:
> 
> 
> I'm about to commit the patch gtk-rao-981125, which
> adds the long-requested feature of GTK_POLICY_NEVER
> to the scrolled window. But I notice that it really
> isn't as useful as it should be because of an
> odditity in the way the Viewport widget works.
> 
> Instead of reporting a requisition equal to the 
> size of it's child plus borders, it always reports
> a requisition of just the size of the borders. This
> means that the GTK_POLICY_NEVER can't be used
> to make a scrolled_window "snap" to the size of the
> child in one direction.
> 
> I'd like to change the viewport so that the requested
> area includes the size of the child. This may
> cause some backwards-incompatibility for programs
> that don't set the usize of scrolled windows and
> assume that their size will be determined by surrounding
> widgets, however such programs can be fixed by the
> simple expedient of:
> 
>  gtk_widget_set_usize (scrolled_window, 0, 0);
> 
> I don't see any other way to enable users to get
> the IMO, very useful above "snapping" behavior
> without gross hacks.
> 
> Comments?

1)  Thanks.  I've wanted POLICY_NEVER for a long time.  :)

2)  The usize change will break a lot of things.  I think it is
important to let a widget resize itself based on overall window size,
without programmer intervention.  Can't you call

	gtk_widget_set_usize (scrolled_window, 0, 0);

in widget setup, unless otherwise directed to by the programmer?

	Jeff