82 lines
2.4 KiB
C#
82 lines
2.4 KiB
C#
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using UnityEngine;
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using System.Collections;
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using UnityEngine.UI;
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using System;
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using frame8.Logic.Misc.Other.Extensions;
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using UnityEngine.EventSystems;
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namespace Com.ForbiddenByte.OSA.Util
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{
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/// <summary>
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/// Utility to delegate the "long click" event to <see cref="longClickListener"/>
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/// It requires a graphic component (can be an image with zero alpha) that can be clicked in order to receive OnPointerDown, OnPointerUp etc.
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/// No other UI elements should be on top of this one in order to receive pointer callbacks
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/// </summary>
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[RequireComponent(typeof(Graphic))]
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public class LongClickableItem : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, ICancelHandler
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{
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public float longClickTime = .7f;
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public IItemLongClickListener longClickListener;
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public StateEnum State { get { return _State; } }
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float _PressedTime;
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StateEnum _State;
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//int _PointerID;
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public enum StateEnum
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{
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NOT_PRESSING,
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PRESSING_WAITING_FOR_LONG_CLICK,
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PRESSING_AFTER_LONG_CLICK
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}
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void Update()
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{
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if (_State == StateEnum.PRESSING_WAITING_FOR_LONG_CLICK)
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{
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if (Time.unscaledTime - _PressedTime >= longClickTime)
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{
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_State = StateEnum.PRESSING_AFTER_LONG_CLICK;
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if (longClickListener != null)
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longClickListener.OnItemLongClicked(this);
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}
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}
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}
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#region Callbacks from Unity UI event handlers
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public void OnPointerDown(PointerEventData eventData)
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{
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//Debug.Log("OnPointerDown" + eventData.button);
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if (eventData.button != PointerEventData.InputButton.Left)
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return;
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//_PointerID = eventData.pointerId;
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_State = StateEnum.PRESSING_WAITING_FOR_LONG_CLICK;
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_PressedTime = Time.unscaledTime;
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}
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public void OnPointerUp(PointerEventData eventData)
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{
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//Debug.Log("OnPointerUp" + eventData.button);
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if (eventData.button != PointerEventData.InputButton.Left)
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return;
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_State = StateEnum.NOT_PRESSING;
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}
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public void OnCancel(BaseEventData eventData)
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{
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//Debug.Log("OnCancel");
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_State = StateEnum.NOT_PRESSING;
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}
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#endregion
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/// <summary>Interface to implement by the class that'll handle the long click events</summary>
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public interface IItemLongClickListener
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{
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void OnItemLongClicked(LongClickableItem longClickedItem);
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}
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}
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}
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