156 lines
4.5 KiB
C#
156 lines
4.5 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace FairyGUI
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{
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/// <summary>
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/// 长按手势。当按下一定时间后(duration)，派发onAction，如果once为false，则间隔duration时间持续派发onAction，直到手指释放。
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/// </summary>
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public class LongPressGesture : EventDispatcher
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{
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/// <summary>
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///
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/// </summary>
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public GObject host { get; private set; }
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/// <summary>
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/// 当手指按下时派发该事件。
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/// </summary>
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public EventListener onBegin { get; private set; }
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/// <summary>
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/// 手指离开屏幕时派发该事件。
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/// </summary>
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public EventListener onEnd { get; private set; }
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/// <summary>
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/// 当手指按下后一段时间后派发该事件。并且在手指离开前按一定周期派发该事件。
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/// </summary>
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public EventListener onAction { get; private set; }
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/// <summary>
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/// 第一次派发事件的触发时间。单位秒
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/// </summary>
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public float trigger;
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/// <summary>
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/// 派发onAction事件的时间间隔。单位秒。
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/// </summary>
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public float interval;
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/// <summary>
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/// 如果为真，则onAction再一次按下释放过程只派发一次。如果为假，则每隔duration时间派发一次。
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/// </summary>
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public bool once;
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/// <summary>
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/// 手指按住后，移动超出此半径范围则手势停止。
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/// </summary>
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public int holdRangeRadius;
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Vector2 _startPoint;
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bool _started;
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int _touchId;
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public static float TRIGGER = 1.5f;
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public static float INTERVAL = 1f;
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public LongPressGesture(GObject host)
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{
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this.host = host;
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trigger = TRIGGER;
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interval = INTERVAL;
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holdRangeRadius = 50;
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Enable(true);
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onBegin = new EventListener(this, "onLongPressBegin");
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onEnd = new EventListener(this, "onLongPressEnd");
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onAction = new EventListener(this, "onLongPressAction");
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}
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public void Dispose()
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{
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Enable(false);
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host = null;
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}
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public void Enable(bool value)
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{
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if (value)
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{
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if (host == GRoot.inst)
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{
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Stage.inst.onTouchBegin.Add(__touchBegin);
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Stage.inst.onTouchEnd.Add(__touchEnd);
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}
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else
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{
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host.onTouchBegin.Add(__touchBegin);
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host.onTouchEnd.Add(__touchEnd);
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}
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}
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else
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{
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if (host == GRoot.inst)
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{
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Stage.inst.onTouchBegin.Remove(__touchBegin);
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Stage.inst.onTouchEnd.Remove(__touchEnd);
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}
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else
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{
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host.onTouchBegin.Remove(__touchBegin);
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host.onTouchEnd.Remove(__touchEnd);
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}
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Timers.inst.Remove(__timer);
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}
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}
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public void Cancel()
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{
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Timers.inst.Remove(__timer);
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_started = false;
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}
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void __touchBegin(EventContext context)
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{
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InputEvent evt = context.inputEvent;
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_startPoint = host.GlobalToLocal(new Vector2(evt.x, evt.y));
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_started = false;
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_touchId = evt.touchId;
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Timers.inst.Add(trigger, 1, __timer);
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context.CaptureTouch();
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}
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void __timer(object param)
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{
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Vector2 pt = host.GlobalToLocal(Stage.inst.GetTouchPosition(_touchId));
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if (Mathf.Pow(pt.x - _startPoint.x, 2) + Mathf.Pow(pt.y - _startPoint.y, 2) > Mathf.Pow(holdRangeRadius, 2))
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{
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Timers.inst.Remove(__timer);
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return;
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}
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if (!_started)
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{
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_started = true;
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onBegin.Call();
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if (!once)
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Timers.inst.Add(interval, 0, __timer);
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}
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onAction.Call();
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}
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void __touchEnd(EventContext context)
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{
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Timers.inst.Remove(__timer);
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if (_started)
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{
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_started = false;
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onEnd.Call();
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}
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}
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}
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}
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