Function on_interactivity_changed 

pub fn on_interactivity_changed(
    child: impl IntoUiNode,
    handler: Handler<Interactivity>,
) -> UiNode

P Widget interactivity changed.

Note that there are multiple specific events for interactivity changes, on_enabled, on_disabled, on_blocked and on_unblocked are some of then.

Route

This event property uses a direct route, that is, it cannot be intercepted in parent widgets.