using System.Collections.Generic;
using UnityEngine;

namespace UIWidgets
{
	public abstract class BaseDragSupport : MonoBehaviour
	{
		protected static Dictionary<Transform, RectTransform> DragPoints;

		private Transform canvasTransform;

		protected Transform CanvasTransform
		{
			get
			{
				if (canvasTransform == null)
				{
					canvasTransform = Utilites.FindCanvas(base.transform);
				}
				return canvasTransform;
			}
		}

		public RectTransform DragPoint
		{
			get
			{
				if (DragPoints == null)
				{
					DragPoints = new Dictionary<Transform, RectTransform>();
				}
				if (!DragPoints.ContainsKey(CanvasTransform))
				{
					GameObject gameObject = new GameObject("DragPoint");
					RectTransform rectTransform = gameObject.AddComponent<RectTransform>();
					rectTransform.SetParent(CanvasTransform, false);
					rectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, 0f);
					rectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0f);
					DragPoints.Add(CanvasTransform, rectTransform);
				}
				return DragPoints[CanvasTransform];
			}
		}
	}
}