Fix AspectRatioLayoutElement to use its own transform.

Assets/Cryville/Common/Unity/UI/AspectRatioLayoutElement.cs

@@ -1,17 +1,9 @@
-using System;
-using UnityEngine;
+using UnityEngine;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
 
 namespace Cryville.Common.Unity.UI {
 	public class AspectRatioLayoutElement : UIBehaviour, ILayoutElement {
-		[SerializeField]
-		private RectTransform m_containerTransform = null;
-		public RectTransform ContainerTransform {
-			get { return m_containerTransform; }
-			set { SetProperty(ref m_containerTransform, value); }
-		}
-
 		[SerializeField]
 		private float m_aspectRatio = 1;
 		public float AspectRatio {
@@ -40,8 +32,8 @@ namespace Cryville.Common.Unity.UI {
 		public float minWidth {
 			get {
 				return m_isVertical
-					? m_containerTransform.rect.width
-					: m_containerTransform.rect.height * m_aspectRatio;
+					? (transform as RectTransform).rect.width
+					: (transform as RectTransform).rect.height * m_aspectRatio;
 			}
 		}
 		public float preferredWidth { get { return minWidth; } }
@@ -50,8 +42,8 @@ namespace Cryville.Common.Unity.UI {
 		public float minHeight {
 			get {
 				return m_isVertical
-					? m_containerTransform.rect.width / m_aspectRatio
-					: m_containerTransform.rect.height;
+					? (transform as RectTransform).rect.width / m_aspectRatio
+					: (transform as RectTransform).rect.height;
 			}
 		}
 		public float preferredHeight { get { return minHeight; } }
@@ -59,13 +51,6 @@ namespace Cryville.Common.Unity.UI {
 
 		public int layoutPriority { get { return 1; } }
 
-		private bool isRootLayoutGroup {
-			get {
-				Transform parent = transform.parent;
-				return parent == null || transform.parent.GetComponent(typeof(ILayoutGroup)) == null;
-			}
-		}
-
 		public void CalculateLayoutInputHorizontal() { }
 
 		public void CalculateLayoutInputVertical() { }