You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.6 KiB
46 lines
1.6 KiB
// UI Drop Zone|UI|80040
|
|
namespace VRTK
|
|
{
|
|
using UnityEngine;
|
|
using UnityEngine.EventSystems;
|
|
|
|
/// <summary>
|
|
/// Specifies a Unity UI Element as being a valid drop zone location for a UI Draggable element.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// > It's appropriate to use a Panel UI element as a drop zone with a layout group applied so new children dropped into the drop zone automatically align.
|
|
///
|
|
/// **Script Usage:**
|
|
/// * Place the `VRTK_UIDropZone` script on the Unity UI element that is to become the drop zone.
|
|
/// </remarks>
|
|
/// <example>
|
|
/// `VRTK/Examples/034_Controls_InteractingWithUnityUI` demonstrates a collection of UI Drop Zones.
|
|
/// </example>
|
|
[AddComponentMenu("VRTK/Scripts/UI/VRTK_UIDropZone")]
|
|
public class VRTK_UIDropZone : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
|
|
{
|
|
protected VRTK_UIDraggableItem droppableItem;
|
|
|
|
public virtual void OnPointerEnter(PointerEventData eventData)
|
|
{
|
|
if (eventData.pointerDrag != null)
|
|
{
|
|
VRTK_UIDraggableItem dragItem = eventData.pointerDrag.GetComponent<VRTK_UIDraggableItem>();
|
|
if (dragItem != null && dragItem.restrictToDropZone)
|
|
{
|
|
dragItem.validDropZone = gameObject;
|
|
droppableItem = dragItem;
|
|
}
|
|
}
|
|
}
|
|
|
|
public virtual void OnPointerExit(PointerEventData eventData)
|
|
{
|
|
if (droppableItem != null)
|
|
{
|
|
droppableItem.validDropZone = null;
|
|
}
|
|
droppableItem = null;
|
|
}
|
|
}
|
|
}
|