49 lines
1.4 KiB
C#
49 lines
1.4 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(RectTransform))]
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public class DragResize : MonoBehaviour, IBeginDragHandler, IEventSystemHandler, IDragHandler
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{
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public RectTransform targetTransform;
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public Vector2 minSize;
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private Vector2 grabPoint;
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private RectTransform rectTransform;
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private void Awake()
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{
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rectTransform = (RectTransform)base.transform;
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}
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public void OnDrag(PointerEventData eventData)
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{
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UpdateDrag(eventData);
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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if ((bool)targetTransform)
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{
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RectTransformUtility.ScreenPointToLocalPointInRectangle(targetTransform, eventData.position, eventData.pressEventCamera, out grabPoint);
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}
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}
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private void UpdateDrag(PointerEventData eventData)
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{
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if (eventData.button == PointerEventData.InputButton.Left && (bool)targetTransform)
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{
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RectTransformUtility.ScreenPointToLocalPointInRectangle(targetTransform, eventData.position, eventData.pressEventCamera, out var localPoint);
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Vector2 vector = localPoint - grabPoint;
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grabPoint = localPoint;
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vector.y = 0f - vector.y;
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minSize = Vector2.Max(rhs: new Vector2(LayoutUtility.GetMinSize(targetTransform, 0), LayoutUtility.GetMinSize(targetTransform, 1)), lhs: minSize);
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targetTransform.sizeDelta = Vector2.Max(targetTransform.sizeDelta + vector, minSize);
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}
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}
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}
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