Re: Using a TreeStore with a ComboBox

["Jonathon Jongsma" <jonathon jongsma gmail com>]

On 6/21/07, Jef Driesen <jefdriesen hotmail com> wrote:
> Using a treestore model with a combobox creates a nice dropdown list
> with submenus. Inside each submenu, the parent item is shown with a
> separator below to separate it from its children. I want to know how I
> can hide this parent node, so I can only select leaf nodes (e.g items
> without children).
>
> The model contains places that can be are arranged by the user in an
> arbitrary hierarchy, to group related places together (for instance by
> continent and/or country). This is very similar how files (my places)
> can be arranged into directories (my hierarchy). But when the user needs
> to select a place with the combobox, it doesn't make sense to be able to
> select an item that is not a place.

You could probably accomplish this fairly easily with TreeModelFilter
(http://gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1TreeModelFilter.html)
wrapping your existing treestore. You'd just need to provide a
function which checks whether a node has children or not, and pass
that function to TreeModelFilter::set_visible_func().  Hope that
helps.
--
jonner