//--------------------------------------------------------
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// [Author]: 玩个游戏
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// [ Date ]: Monday, July 31, 2017
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//--------------------------------------------------------
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using UnityEngine;
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using System.Collections;
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using UnityEngine.EventSystems;
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using System;
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public class DragItem:MonoBehaviour,ICanvasRaycastFilter,IBeginDragHandler,IDragHandler,IEndDragHandler {
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[SerializeField]
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RectTransform m_Area;
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public RectTransform area { get { return m_Area; } }
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[SerializeField]
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bool m_RaycastTarget = true;
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public bool raycastTarget {
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get { return m_RaycastTarget; }
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private set { m_RaycastTarget = value; }
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}
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RectTransform m_RectTransform;
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public RectTransform rectTransform { get { return this.transform as RectTransform; } }
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public void OnBeginDrag(PointerEventData eventData) {
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raycastTarget = false;
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this.transform.position = UIUtility.ClampWorldPosition(area,eventData);
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}
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public void OnDrag(PointerEventData eventData) {
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this.transform.position = UIUtility.ClampWorldPosition(area,eventData);
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}
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public void OnEndDrag(PointerEventData eventData) {
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raycastTarget = true;
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if(eventData.pointerEnter == null) {
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return;
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}
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var container = eventData.pointerEnter.GetComponent<DragContainer>();
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if(container == null) {
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return;
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}
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var contain = UIUtility.RectTransformContain(eventData.pointerEnter.transform as RectTransform,rectTransform);
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if(contain) {
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rectTransform.position = eventData.pointerEnter.transform.position;
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}
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}
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public bool IsRaycastLocationValid(Vector2 sp,Camera eventCamera) {
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return raycastTarget;
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}
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}
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