Function on_collapse

pub fn on_collapse(
    child: impl UiNode,
    handler: impl WidgetHandler<VisibilityChangedArgs>,
) -> impl UiNode

P Widget visibility changed to collapsed.

Preview

You can preview this event using on_pre_collapse. Otherwise the handler is only called after the widget content has a chance to stop propagation.

Async

You can use async event handlers with this property.