or -1 if there’s no active item
ComboBox.getActive
int getActive()Returns the index of the currently active item.
If the model is a non-flat treemodel, and the active item is not an immediate child of the root of the tree, this function returns gtk_tree_path_get_indices (path)[0], where path is the gtk.tree_path.TreePath of the active item.
Returns
An integer which is the index of the currently active item,