Manual/UIE-faq-event-and-input-system

[giscus[bot]]

Manual/UIE-faq-event-and-input-system

https://docs.unity3d.com/Manual/UIE-faq-event-and-input-system.html

[vertxxyz]

The GameObject containing the PanelRaycaster and PanelEventHandler can be found via the UIDocument's runtimePanel.selectableGameObject.

[vertxxyz]

Because Tab is forcibly bound to NavigationMoveEvent's Next/Previous you may want to stop those events from entering your hierarchy using something similar to this code:

// If you send your own Next/Prev event, assign it before calling SendEvent.
private NavigationMoveEvent? _allowedNextPrevEvent;

private void OnEnable()
{
    ...
    rootVisualElement.RegisterCallback<NavigationMoveEvent>(OnNavigationMoveEvent, TrickleDown.TrickleDown);
}

private void OnNavigationMoveEvent(NavigationMoveEvent evt) {
  if (evt.direction is not (NavigationMoveEvent.Direction.Next or NavigationMoveEvent.Direction.Previous)
    || evt.propagationPhase != PropagationPhase.TrickleDown) {
    // Allow other directions or subsequent phases.
    return;
  }
  
  if (evt == _allowedNextPrevEvent) {
    // Allow a manually assigned event.
    _allowedNextPrevEvent = null;
    return;
  }

  // Stop handling this event because it was likely sent from the forcibly-enabled internal Tab-handling code.
  evt.StopImmediatePropagation();
  _document.rootVisualElement.focusController.IgnoreEvent(evt);
}