62 lines
2.2 KiB
C#
62 lines
2.2 KiB
C#
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/// Credit .entity
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/// Sourced from - http://forum.unity3d.com/threads/rescale-panel.309226/
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using UnityEngine.EventSystems;
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namespace UnityEngine.UI.Extensions
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{
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[AddComponentMenu("UI/Extensions/RescalePanels/RescalePanel")]
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public class RescalePanel : MonoBehaviour, IPointerDownHandler, IDragHandler
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{
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public Vector2 minSize;
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public Vector2 maxSize;
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private RectTransform rectTransform;
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private Transform goTransform;
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private Vector2 currentPointerPosition;
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private Vector2 previousPointerPosition;
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private RectTransform thisRectTransform;
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Vector2 sizeDelta;
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void Awake()
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{
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rectTransform = transform.parent.GetComponent<RectTransform>();
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goTransform = transform.parent;
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thisRectTransform = GetComponent<RectTransform>();
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sizeDelta = thisRectTransform.sizeDelta;
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}
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public void OnPointerDown(PointerEventData data)
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{
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rectTransform.SetAsLastSibling();
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RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, data.position, data.pressEventCamera, out previousPointerPosition);
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}
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public void OnDrag(PointerEventData data)
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{
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if (rectTransform == null)
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return;
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Vector3 scaleDelta = goTransform.localScale;
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RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, data.position, data.pressEventCamera, out currentPointerPosition);
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Vector2 resizeValue = currentPointerPosition - previousPointerPosition;
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scaleDelta += new Vector3(-resizeValue.y * 0.001f, -resizeValue.y * 0.001f, 0f);
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scaleDelta = new Vector3(
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Mathf.Clamp(scaleDelta.x, minSize.x, maxSize.x),
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Mathf.Clamp(scaleDelta.y, minSize.y, maxSize.y),
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1
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);
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goTransform.localScale = scaleDelta;
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previousPointerPosition = currentPointerPosition;
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float resizeDeltaValue = sizeDelta.x / goTransform.localScale.x;
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Vector2 newSizeDelta = new Vector2(resizeDeltaValue, resizeDeltaValue);
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thisRectTransform.sizeDelta = newSizeDelta;
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}
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}
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}
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