private void AnimateBoxToBox(Vector2Int _fromIndex, Vector2Int _toIndex)
{
GridBox gbFrom = mGridBoxList[GetMapedInex(_fromIndex.x, _fromIndex.y)];
GridBox gbTo = mGridBoxList[GetMapedInex(_toIndex.x, _toIndex.y)];
//Debug.Log ("converting from " + gbFrom.GetCurrentValue () + " >> " + gbTo.GetCurrentValue ());
Vector2 posFrom = gbFrom.transform.localPosition;
Vector2 posTo = gbTo.transform.localPosition;
GridBox dummyBox = GetAnimatingBox();
dummyBox.ModifyValue(gbFrom.GetCurrentValue());
dummyBox.SetBgSize(gbFrom.GetComponent <RectTransform> ().sizeDelta.x);
dummyBox.transform.localPosition = posFrom;
dummyBox.gameObject.SetActive(true);
gbFrom.ModifyValue(0);
dummyBox.transform.DOLocalMove(posTo, m_AnimationDuration).OnComplete(() => {
dummyBox.gameObject.SetActive(false);
PrintGrid();
});
}