org.gnome.gtk
Interface TreeModelFilter.Visible

Enclosing class:

TreeModelFilter

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().

Since:

4.0.6

Author:

Andrew Cowie

onVisible

boolean onVisible(TreeModelFilter source,
                  TreeModel base,
                  TreeIter row)

Answer the question "is this row to be visible?" Return true for the row to be included in the model, or false for the row to be filtered out.

Warning!
row is a valid TreeIter in base, not source. This makes sense if you consider that you will need to ask the underlying proxied TreeModel for information about a row; the only rows you can see in the source TreeModelFilter are, of course, the ones that have passed this test.

Since:

4.0.6

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