public static interface TreeModelFilter.Visible

The callback invoked when a TreeModelFilter wants to ask if a given row in its child TreeModel should be considered visible in the TreeModelFilter.

Typically when you receive this callback you will reach into the underlying model and query a column by which you will determine whether or not to include this row. This grants the opportunity to put some very complex logic into the TextModelFilter.Visible callback. We tend to prefer this approach, but if you're rather pre-calculate such states, then you can always add a DataColumnBoolean to the model and simply return the state of that column as the return value from this interface when it is invoked.

If you are researching the GTK API documentation, see (*GtkTreeModelFilterVisibleFunc). Creating and invoking this "visible" signal is how java-gnome has implemented the function pointer expected by gtk_tree_model_filter_set_visible_func().