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 [[email protected]] of the active item.
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A `GtkComboBox` |
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An integer which is the index of the currently active item, or -1 if there’s no active item |