Re: Widget management

[Havoc Pennington <rhpennin midway uchicago edu>]

On Fri, 6 Nov 1998, Eric Faurot wrote:
> 
> If I call gtk_widget_destroy(wdg), are all the sub-widgets
> attached to wdg destroyed too?

Yes, all children of containers get destroyed.

> (If so what if I attach a
> widget to two others?)

You can't do this, a widget can only display in one place on the screen.
You can add refcounts to the widget though to keep it from dying.

> I don't quite understand ref and unref. Is there a kind
> of garbage-collection in the gtk_main loop?
> 

No, it's simpler than that; it just keeps a count of ref's and when that
reaches zero does a destroy. You can ignore these most of the time.

Look at refcounting.txt in the docs directory of gtk+.

Mostly if you add every widget to a container, you only need to worry
about destroying toplevel windows.

Havoc