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