53 lines
2.1 KiB
C#
53 lines
2.1 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.EventSystems;
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using UnityEngine.UI;
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namespace Ichni.UI
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{
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public class ModifyValueSlider : MonoBehaviour, IPointerClickHandler, IDragHandler
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{
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public ValueModifier valueModifier;
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public RectTransform sliderBackground;
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public void OnPointerClick(PointerEventData eventData)
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{
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valueModifier.SetValue(valueModifier.GetNearestValue(GetPercentage(eventData.position)));
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}
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public void OnDrag(PointerEventData eventData)
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{
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valueModifier.SetValue(valueModifier.GetNearestValue(GetPercentage(eventData.position)));
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}
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private float GetPercentage(Vector2 inputPosition)
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{
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if (RectTransformUtility.ScreenPointToLocalPointInRectangle(sliderBackground, inputPosition, Camera.main, out Vector2 localCursor))
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{
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// 4. 计算百分比
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// localCursor.x 是相对于RectTransform轴心（Pivot）的x坐标
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// 我们需要将其转换为从左边界（0%）到右边界（100%）的百分比
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// 获取RectTransform的宽度
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float width = sliderBackground.rect.width;
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// 将相对于轴心的坐标转换为相对于左边界的坐标
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// localCursor.x + rectTransform.pivot.x * width
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// 例如：如果pivot在中心(0.5)，localCursor.x的范围是 -width/2 到 +width/2
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// 加上 pivot.x * width (即 0.5 * width) 后，范围就变为 0 到 width
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float distanceFromLeft = localCursor.x + sliderBackground.pivot.x * width;
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// 计算百分比 (0.0到1.0之间)
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float percentage = distanceFromLeft / width;
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// 使用Mathf.Clamp01确保结果在0和1之间，防止点击到UI外部一点点时出现误差
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percentage = Mathf.Clamp01(percentage);
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return percentage;
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}
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return 0f;
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}
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}
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}
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