60 lines
2.2 KiB
C#
60 lines
2.2 KiB
C#
/// 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/ResizePanel")]
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public class ResizePanel : 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 Vector2 currentPointerPosition;
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private Vector2 previousPointerPosition;
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private float ratio;
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void Awake()
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{
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rectTransform = transform.parent.GetComponent<RectTransform>();
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float originalWidth;
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float originalHeight;
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originalWidth = rectTransform.rect.width;
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originalHeight = rectTransform.rect.height;
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ratio = originalHeight / originalWidth;
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minSize = new Vector2(0.1f * originalWidth, 0.1f * originalHeight);
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maxSize = new Vector2(10f * originalWidth, 10f * originalHeight);
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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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Vector2 sizeDelta = rectTransform.sizeDelta;
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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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sizeDelta += new Vector2(resizeValue.x, ratio * resizeValue.x);
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sizeDelta = new Vector2(
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Mathf.Clamp(sizeDelta.x, minSize.x, maxSize.x),
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Mathf.Clamp(sizeDelta.y, minSize.y, maxSize.y)
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);
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rectTransform.sizeDelta = sizeDelta;
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previousPointerPosition = currentPointerPosition;
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}
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}
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} |