PropertyBinding.cs

using UnityEngine;

[AddComponentMenu("NGUI/Internal/Property Binding")]
[ExecuteInEditMode]
public class PropertyBinding : MonoBehaviour
{
	public enum UpdateCondition
	{
		OnStart,
		OnUpdate,
		OnLateUpdate,
		OnFixedUpdate
	}

	public enum Direction
	{
		SourceUpdatesTarget,
		TargetUpdatesSource,
		BiDirectional
	}

	public PropertyReference source;

	public PropertyReference target;

	public Direction direction;

	public UpdateCondition update = UpdateCondition.OnUpdate;

	public bool editMode = true;

	private object mLastValue;

	private void Start()
	{
		UpdateTarget();
		if (update == UpdateCondition.OnStart)
		{
			base.enabled = false;
		}
	}

	private void Update()
	{
		if (update == UpdateCondition.OnUpdate)
		{
			UpdateTarget();
		}
	}

	private void LateUpdate()
	{
		if (update == UpdateCondition.OnLateUpdate)
		{
			UpdateTarget();
		}
	}

	private void FixedUpdate()
	{
		if (update == UpdateCondition.OnFixedUpdate)
		{
			UpdateTarget();
		}
	}

	private void OnValidate()
	{
		if (source != null)
		{
			source.Reset();
		}
		if (target != null)
		{
			target.Reset();
		}
	}

	[ContextMenu("Update Now")]
	public void UpdateTarget()
	{
		if (source != null && target != null && source.isValid && target.isValid)
		{
			if (direction == Direction.SourceUpdatesTarget)
			{
				target.Set(source.Get());
			}
			else if (direction == Direction.TargetUpdatesSource)
			{
				source.Set(target.Get());
			}
			else if (source.GetPropertyType() == target.GetPropertyType())
			{
				object obj = source.Get();
				if (mLastValue == null || !mLastValue.Equals(obj))
				{
					mLastValue = obj;
					target.Set(obj);
				}
				else
				{
					obj = target.Get();
					if (!mLastValue.Equals(obj))
					{
						mLastValue = obj;
						source.Set(obj);
					}
				}
			}
		}
	}
}