Function on_pre_key_input 

pub fn on_pre_key_input(
    child: impl IntoUiNode,
    handler: Handler<KeyInputArgs>,
) -> UiNode

P Event fired when a keyboard key is pressed or released and the widget is enabled.

Route

The event is raised in the keyboard focused widget and then each parent up to the root. If propagation stop is requested the event is not notified further. If the widget is disabled or blocked the event is not notified.

This route is also called bubbling.

Keys

Any key press/release generates a key input event, including keys codes that don’t map to any virtual key, see KeyInputArgs for more details.

For key combinations consider using a click_shortcut with a click handler.

Underlying Event

This event property uses the KEY_INPUT_EVENT that is included in the default app.

Route

This event property uses the preview route, that is, the handler is called before the children widget handlers and before the $pn_ident handlers.