56 lines
1.7 KiB
C#
56 lines
1.7 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.UI;
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namespace MoreMountains.Tools
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{
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/// <summary>
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/// Add this class to a UI slider and it'll let you trigger events when the cursor moves past a certain step
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/// </summary>
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[AddComponentMenu("More Mountains/Tools/GUI/MMSliderStep")]
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[RequireComponent(typeof(Slider))]
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public class MMSliderStep : MonoBehaviour
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{
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[Header("Slider Step")]
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/// the threshold to trigger steps at
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public float StepThreshold = 0.1f;
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/// the event to trigger when a step is met
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public UnityEvent OnStep;
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protected Slider _slider;
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protected float _lastStep = 0f;
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/// <summary>
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/// On enable, starts listening for value change events
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/// </summary>
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protected virtual void OnEnable()
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{
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_slider = this.gameObject.GetComponent<Slider>();
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_slider.onValueChanged.AddListener(ValueChangeCheck);
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}
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/// <summary>
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/// On disable, stops listening for value change events
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/// </summary>
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protected virtual void OnDisable()
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{
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_slider.onValueChanged.RemoveListener(ValueChangeCheck);
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}
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/// <summary>
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/// when a value change is met, we trigger an event
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/// </summary>
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/// <param name="value"></param>
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public virtual void ValueChangeCheck(float value)
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{
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if (Mathf.Abs(_slider.value - _lastStep) > StepThreshold)
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{
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_lastStep = _slider.value;
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OnStep?.Invoke();
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}
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}
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}
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}
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