When making a game menu, how do I hook into "OnSelect"/"OnDeselect"/"OnHighlight"/etc with custom callbacks?
The Button MonoBehaviour doesn't seem to allow subscribing to those events. And extending the class doesn't seem to work either.
I've worked on projects that built their own button system to get around this, but that felt wrong.
If you are using the default unity UI, one way to do that is by implementing some interfaces that unity provides for those callbacks.
ISelectHandler: Called when an object is selected.
IDeselectHandler: Called when an object is deselected.
IPointerEnterHandler: Called when the pointer enters an object's area (highlight).
IPointerExitHandler: Called when the pointer exits an object's area.
using UnityEngine;
using UnityEngine.EventSystems;
public class MenuCallbacks : MonoBehaviour, ISelectHandler, IDeselectHandler
{
// Called when the object is selected
public void OnSelect(BaseEventData eventData)
{
Debug.Log("Selected: " + gameObject.name);
// Custom callback logic
}
// Called when the object is deselected
public void OnDeselect(BaseEventData eventData)
{
Debug.Log("Deselected: " + gameObject.name);
// Custom callback logic
}
}
