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Receiveing Events

Events are received by a widget through the on_event() function within the EventHandler trait which is implemented by all widgets. To access the message within an event, the message must be downcast to the correct type. For example, inside the on_event function:

if let Some(window_event) = event.message.downcast::<WindowEvent>() {
    // Do something with the window_event, like matching on the different variants
}