84 lines
2.1 KiB
C#
84 lines
2.1 KiB
C#
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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 RoR2.UI;
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[RequireComponent(typeof(ScrollRect))]
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[RequireComponent(typeof(MPEventSystemLocator))]
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public class ScrollToSelection : MonoBehaviour
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{
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private ScrollRect scrollRect;
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private MPEventSystemLocator eventSystemLocator;
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private Vector3[] targetWorldCorners = new Vector3[4];
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private Vector3[] viewPortWorldCorners = new Vector3[4];
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private GameObject lastSelectedObject;
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private EventSystem eventSystem => eventSystemLocator.eventSystem;
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private void Awake()
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{
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scrollRect = GetComponent<ScrollRect>();
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eventSystemLocator = GetComponent<MPEventSystemLocator>();
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}
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private void Update()
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{
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GameObject gameObject = (eventSystem ? eventSystem.currentSelectedGameObject : null);
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if (lastSelectedObject != gameObject)
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{
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if ((bool)gameObject && gameObject.transform.IsChildOf(base.transform))
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{
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ScrollToRect((RectTransform)gameObject.transform);
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}
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lastSelectedObject = gameObject;
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}
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}
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private void ScrollToRect(RectTransform targetRectTransform)
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{
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targetRectTransform.GetWorldCorners(targetWorldCorners);
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((RectTransform)base.transform).GetWorldCorners(viewPortWorldCorners);
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if (scrollRect.vertical && (bool)scrollRect.verticalScrollbar)
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{
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float y = targetWorldCorners[1].y;
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float y2 = targetWorldCorners[0].y;
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float y3 = viewPortWorldCorners[1].y;
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float y4 = viewPortWorldCorners[0].y;
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float num = y - y3;
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float num2 = y2 - y4;
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float num3 = y3 - y4;
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if (num > 0f)
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{
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scrollRect.verticalScrollbar.value += num / num3;
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}
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if (num2 < 0f)
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{
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scrollRect.verticalScrollbar.value += num2 / num3;
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}
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}
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if (scrollRect.horizontal && (bool)scrollRect.horizontalScrollbar)
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{
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float y5 = targetWorldCorners[2].y;
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float y6 = targetWorldCorners[0].y;
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float y7 = viewPortWorldCorners[2].y;
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float y8 = viewPortWorldCorners[0].y;
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float num4 = y5 - y7;
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float num5 = y6 - y8;
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float num6 = y7 - y8;
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if (num4 > 0f)
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{
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scrollRect.horizontalScrollbar.value += num4 / num6;
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}
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if (num5 < 0f)
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{
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scrollRect.horizontalScrollbar.value += num5 / num6;
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}
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}
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}
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}
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