Re: Repacking a table

["muppet" <scott asofyet org>]

Johan Aberg wrote:
> I'm trying to update the items packed in the table but I'm not sure I
> understand how to do it. I was trying to destroy everything in the
> table and then loop over my new images and then call attach to rebuild
> the table with new the images. For various reasons in my design,  I
> can not just simply keep the images and just replace their pixbuffers
> to update the content of the table.

That seems like an odd limitation.  The Gtk2::Image widgets are just views for
your images and should be interchangeable.  Can't you fix your design?  After
all, if you wind up having to manipulate a table as you propose below, you're
doing something that is not very idiomatic for the toolkit and there's likely
to be an easier way.

For example, can you use a Gtk2::IconView instead of this manual table thing?


> My question is, is it possible to repack after the main event loop has
> been started? I seems to be able to destroy items, but not add table
> items once the program is running?

Yes.  Your solution will involve Gtk2::Container::remove() and
Gtk2::Container::get_children().

Note that Gtk2::Table does not appear to have a way to get the widget at some
location, so you need to know which child is which when you iterate over the
list of children.


> When I destroy an item with children, does GTK2 remove the children
> and free up the memory they allocated?

For the most part, yes.  Watch for reference cycles.  This is yet another
reason you'd likely be better off keeping only the pixbufs...


-- 
muppet <scott at asofyet dot org>