Function on_mouse_down 

pub fn on_mouse_down(
    child: impl IntoUiNode,
    handler: Handler<MouseInputArgs>,
) -> UiNode

P Mouse button pressed while the cursor is over the widget, the widget is enabled and cursor capture allows it.

Preview

You can preview this event using on_pre_mouse_down. 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.