88 lines
2.3 KiB
C#
88 lines
2.3 KiB
C#
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namespace SRF.UI
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{
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using System;
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using Internal;
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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[AddComponentMenu(ComponentMenuPaths.SRSpinner)]
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public class SRSpinner : Selectable, IDragHandler, IBeginDragHandler
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{
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private float _dragDelta;
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[SerializeField] private SpinEvent _onSpinDecrement = new SpinEvent();
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[SerializeField] private SpinEvent _onSpinIncrement = new SpinEvent();
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/// <summary>
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/// Number of units a drag must accumulate to trigger a change
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/// </summary>
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public float DragThreshold = 20f;
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public SpinEvent OnSpinIncrement
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{
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get { return _onSpinIncrement; }
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set { _onSpinIncrement = value; }
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}
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public SpinEvent OnSpinDecrement
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{
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get { return _onSpinDecrement; }
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set { _onSpinDecrement = value; }
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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_dragDelta = 0;
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (!interactable)
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{
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return;
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}
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_dragDelta += eventData.delta.x;
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if (Mathf.Abs(_dragDelta) > DragThreshold)
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{
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var direction = Mathf.Sign(_dragDelta);
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var quantity = Mathf.FloorToInt(Mathf.Abs(_dragDelta)/DragThreshold);
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if (direction > 0)
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{
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OnIncrement(quantity);
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}
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else
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{
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OnDecrement(quantity);
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}
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_dragDelta -= quantity*DragThreshold*direction;
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}
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}
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private void OnIncrement(int amount)
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{
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for (var i = 0; i < amount; i++)
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{
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OnSpinIncrement.Invoke();
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}
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}
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private void OnDecrement(int amount)
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{
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for (var i = 0; i < amount; i++)
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{
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OnSpinDecrement.Invoke();
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}
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}
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[Serializable]
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public class SpinEvent : UnityEvent {}
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}
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}
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