Popup for nGUI,Unity3D

UIPopup.cs

using UnityEngine;
using System.Collections;

// delegates
public enum UIPopupState {
	SUBMIT,
	CANCEL
}
public delegate void ClickDelegate(UIPopupState state);

/// <summary>
/// 	Common Popup Framework
///		by koki ibukuro
/// </summary>
[AddComponentMenu("NGUI/Interaction/Ex/Popup")]
public class UIPopup : MonoBehaviour {

	public bool enableCoverCancel = true;
	public UIEventListener submitButton;
	public UIEventListener cancelButton;
	public UIEventListener coverButton;
	
	public UILabel mainLabel;
	public string mainText;
	
	public UILabel submitLabel;
	public string submitText = "ok";
	
	public UILabel cancelLabel;
	public string cancelText = "cancel";	
	
	
	private ClickDelegate _popupDelegate = null;
	
	void Start () {
		if(submitButton) {
			submitButton.onClick = onSubmitClicked;
		}
		if(cancelButton) {
			cancelButton.onClick = onCancelClicked;
		}
		if(coverButton) {
			coverButton.onClick = onCoverClicked;
		}
		if(mainLabel) {
			mainLabel.text = mainText;
		}
		if(submitLabel) {
			submitLabel.text = submitText;
		}
		if(cancelLabel) {
			cancelLabel.text = cancelText;
		}
	}
	
	void OnDestroy() {
		submitButton.onClick = null;
		cancelButton.onClick = null;
		coverButton.onClick = null;
		
		submitButton = null;
		cancelButton = null;
		coverButton = null;
		
		mainLabel = null;
		submitLabel = null;
		cancelLabel = null;
	}
	
	/// <summary>
	/// 	Set Click Delegate
	/// </summary>
	public void SetClickDelegate(ClickDelegate del) {
		_popupDelegate = del;
	}
		
	void onSubmitClicked(GameObject go) {
		animateDestroy();
		callDelegte(UIPopupState.SUBMIT);
	}
	
	void onCancelClicked(GameObject go) {
		animateDestroy();
		callDelegte(UIPopupState.CANCEL);
	}
	
	void onCoverClicked(GameObject go) {
		if(enableCoverCancel) {
			animateDestroy();
			if(cancelButton != null) {
				callDelegte(UIPopupState.CANCEL);
			}
			else {
			    callDelegte(UIPopupState.SUBMIT);
			}
		}
	}
	
	
	void animateDestroy() {
		UIWidget[] wigets = GetComponentsInChildren<UIWidget>();
		Color toColor = new Color(1f,1f,1f,0f);
		float tweenTime = 0.5f;
		
		foreach(UIWidget wiget in wigets) {
			TweenColor tween = TweenColor.Begin(wiget.gameObject, tweenTime, toColor);
			tween.method = UITweener.Method.EaseOut;
			tween.Play(true);
		}
		StartCoroutine(OnAnimateDestroyFinished(tweenTime));
	}
	
	IEnumerator OnAnimateDestroyFinished(float time) {
		yield return new WaitForSeconds(time);
		Destroy(gameObject);
	}
	
	void callDelegte(UIPopupState state) {
		if(_popupDelegate != null) {
			_popupDelegate(state);
		}
		else {
			Debug.LogWarning("you need set Delegate");
		}
	}
}