Re: [gtk-list] tree{,item} widget questions

[Tim Janik <timj gimp org>]

On 8 Mar 1998, Michael Poole wrote:

> 	I was browsing through the tree widget source for 0.99.4, and I had
> two questions:
> 
> 1) If I wanted to tack on 'satellite' data to something such as a
>    GTKTreeItem (to hook on my own data to a tree item to refer to when
>    the user selects the item), is gtk_object_{set,get}_data (or the
>    {get,set}_user_data wrappers) the "right" way to do this?

gtk_object_set_data/gtk_object_get_data or gtk_object_set_data_full is what
you want.

> 2) In gtk_tree_insert, there's a check to make sure the new child is a tree
>    item, but there's no such check in gtk_tree_add; is this intentional?
>    There are (unprotected, as nearly as I can determine) GTK_TREE_ITEM()
>    casts made on a child in:
>    gtk_tree_draw, gtk_tree_foreach, gtk_tree_map, gtk_tree_remove_items,
>    gtk_tree_size_allocate, and gtk_tree_size_request
>    and there are type-checked casts several other places.  It seems likely
>    to me that the intention was for a GTKTree to only allow GTKTreeItems
>    as children, although these GTKTreeItems may have other kinds of
>    children themselves (which is allowed -- or at least handled -- in
>    gtk_tree_button_press).

quoting from the TODO:

 * GtkTree and GtkList should express in their *_add implementations,
   that they expect GtkListItems/GtkTreeItems as children. Similar
   things might apply to other containers.

> 
> Thanks in advance,
> - Michael
> 

---
ciaoTJ