By setting a sort function on the box one can dynamically reorder the rows
of the list, based on the contents of the rows.
The sort_func will be called for each row after the call, and will continue to
be called each time a row changes (via ListBox.rowChanged) and when
ListBox.invalidateSort is called.
Note that using a sort function is incompatible with using a model
(see ListBox.bindModel).
By setting a sort function on the box one can dynamically reorder the rows of the list, based on the contents of the rows.
The sort_func will be called for each row after the call, and will continue to be called each time a row changes (via ListBox.rowChanged) and when ListBox.invalidateSort is called.
Note that using a sort function is incompatible with using a model (see ListBox.bindModel).