using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
[DisallowMultipleComponent]
[RequireComponent(typeof(RectTransform))]
[RequireComponent(typeof(CanvasRenderer))]
[AddComponentMenu("UI/UI_Image", 99)]
[ExecuteInEditMode]
public class UI_Image : Image {
	[SerializeField]
	private Vector3 offsetLeftButtom = Vector3.zero;
	public Vector3 OffsetLeftButtom{
		get{return offsetLeftButtom;}
		set{
			offsetLeftButtom = value;
			SetAllDirty();
		}
	}
	[SerializeField]
	private Vector3 offsetRightButtom = Vector3.zero;
	public Vector3 OffsetRightButtom{
		get{return offsetRightButtom;}
		set{
			offsetRightButtom = value;
			SetAllDirty();
		}
	}
	[SerializeField]
	private Vector3 offsetLeftTop = Vector3.zero;
	public Vector3 OffsetLeftTop{
		get{return offsetLeftTop;}
		set{
			offsetLeftTop = value;
			SetAllDirty();
		}
	}
	[SerializeField]
	private Vector3 offsetRightTop = Vector3.zero;
	public Vector3 OffsetRightTop{
		get{return offsetRightTop;}
		set{
			offsetRightTop = value;
			SetAllDirty();
		}
	}
	Vector3 GetOffsetVector(int i){
		if (i == 0){
			return offsetLeftButtom;
		}else if (i == 1){
			return offsetLeftTop;
		}else if (i == 2){
			return offsetRightTop;
		}else {
			return offsetRightButtom;
		}
	}
	protected override void OnPopulateMesh(VertexHelper toFill){
		base.OnPopulateMesh(toFill);
		int count = toFill.currentVertCount;
		for(int i=0;i<count;i++){
			UIVertex vertex = new UIVertex();
			toFill.PopulateUIVertex(ref vertex, i);
			// Debug.Log(i.ToString() + ": " + oldPosition[i].ToString());
			vertex.position += GetOffsetVector(i);
			toFill.SetUIVertex(vertex, i);
		}
	}
}