set_filter_func

By setting a filter function on the this one can decide dynamically which of the children to show.

For instance, to implement a search function that only shows the children matching the search terms.

The filter_func will be called for each child after the call, and it will continue to be called each time a child changes (via [ method@Gtk.FlowBoxChild.changed]) or when [method@Gtk.FlowBox.invalidate_filter] is called.

Note that using a filter function is incompatible with using a model (see [method@Gtk.FlowBox.bind_model]).

Parameters:

this	a `GtkFlowBox`
filter_func	callback that lets you filter which children to show
destroy	destroy notifier for user_data
user_data	user data passed to filter_func