//-------------------------------------------------
//            NGUI: Next-Gen UI kit
// Copyright © 2011-2019 Tasharen Entertainment Inc
//-------------------------------------------------

using UnityEngine;

/// <summary>
/// Attaching this script to an element of a scroll view will make it possible to center on it by clicking on it.
/// </summary>

[AddComponentMenu("NGUI/Interaction/Center Scroll View on Click")]
public class UICenterOnClick : MonoBehaviour
{
	public void OnClick ()
	{
		UICenterOnChild center = NGUITools.FindInParents<UICenterOnChild>(gameObject);
		UIPanel panel = NGUITools.FindInParents<UIPanel>(gameObject);

        if (center != null)
		{
			center.bCenterOn = true;

			if (center.enabled)
				center.CenterOn(transform);
		}
		else if (panel != null && panel.clipping != UIDrawCall.Clipping.None)
		{
			UIScrollView sv = panel.GetComponent<UIScrollView>();
			Vector3 offset = -panel.cachedTransform.InverseTransformPoint(transform.position);
			if (!sv.canMoveHorizontally) offset.x = panel.cachedTransform.localPosition.x;
			if (!sv.canMoveVertically) offset.y = panel.cachedTransform.localPosition.y;
			SpringPanel.Begin(panel.cachedGameObject, offset, 6f);
		}
	}

    public void OnClick_byCenterOnChild()
    {
		UICenterOnChild center = NGUITools.FindInParents<UICenterOnChild>(gameObject);
		if (center == null) center = transform.parent.gameObject.AddComponent<UICenterOnChild>();
		center.bCenterOn = true;
		center.enabled = true;
		//Single.Coroutine.NextUpdate(() =>
		//{
		//	center.CenterOn(transform);
		//});
		center.onFinished = () =>
		{
			center.enabled = false;
			Destroy(this);
		};
	}
}