Re: [Vala] gtk treeview (one column) example

[pancake <pancake youterm com>]

On Thu, Nov 08, 2007 at 06:36:08PM +0100, J?rg Billeter wrote:
> On Thu, 2007-11-08 at 14:43 +0100, pancake wrote:
> > Here's a one column example for using gtktreeview with Vala.
> >
> > Maybe the code can be better, but it works, and imho is most ok.
> >
> > the treeview is one of the most complicated things to manage with gtk, so
> > a good documentation for it would be good.
> >
> > The example is attached.
>
> You should be able to use
>
> string foo;
> ?tv.model.get(ref iter, 0, out foo);

Oh yes, sorry. I missed that point. but what about passing:

  tv.model.get(ref iter, 0, foo.str);

does this code leaks?

> to retrieve a string. Your version will lead to a memory leak as the
> preallocated GString will be replaced by the string allocated by the
> tree model.

I remember to had problems with this, and the only way to get no segfaults
was to allocate a statically sized string passing it as argument for the
tv.model.get, so at C level this is a "char*", and makes gcc not cry
with warnings or so. But that's not clean for my eyes.

But I have fixed that on the source. Take a look on the attachment.

> What about adding this example after the simplification to the Wiki?

What's clener for you? Store ListStore twice inside tv.model and on a private
variable? or cast it everytime ((ListStore)tv.model).xxx ?



--pancake