Emitted when the set of selected children changes.
Use [method@Gtk.FlowBox.selected_foreach] or [method@Gtk.FlowBox.get_selected_children] to obtain the selected children.
See Implementation
Emitted when the set of selected children changes.
Use [method@Gtk.FlowBox.selected_foreach] or [method@Gtk.FlowBox.get_selected_children] to obtain the selected children.