//--------------------------------------------------------
//    [Author]:           第二世界
//    [  Date ]:           Monday, April 09, 2018
//--------------------------------------------------------
using UnityEngine;
using System.Collections;
using UnityEngine.UI;


public class UISmoothMove : MonoBehaviour
{
    [SerializeField] Vector2 m_To;
    public Vector2 to {
        get { return m_To; }
        set { m_To = value; }
    }

    [SerializeField] float m_Smooth = 0.2f;

    Vector2 refPosition = Vector2.zero;
    RectTransform rectTransform { get { return this.transform as RectTransform; } }

    bool show = false;

    public void Begin()
    {
        refPosition = Vector2.zero;
        show = true;
    }

    public void Stop()
    {
        show = false;
    }

    private void LateUpdate()
    {
        if (Vector2.Distance(rectTransform.anchoredPosition, to) > 1f)
        {
            if (show)
            {
                var newPosition = Vector2.SmoothDamp(rectTransform.anchoredPosition, to, ref refPosition, m_Smooth, 1000, Time.deltaTime);
                rectTransform.anchoredPosition = newPosition;
            }
        }
        else
        {
            show = false;
        }
    }


}