216 lines
12 KiB
Plaintext
216 lines
12 KiB
Plaintext
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€ Þ € € . € € y €Q Þ € € . € € Þ €X ! H €i ÿÿÿÿ" € 1 €1 €ÿÿÿÿ# @ Þ € € $ Q €j € % H €u ÿÿÿÿ& € 1 €1 €ÿÿÿÿ' @ Þ € € ( Q €j € ) PPtr<EditorExtension> m_FileID m_PathID PPtr<PrefabInstance> m_DefaultReferences m_Icon m_ExecutionOrder m_ClassName m_Namespace l p \ ày¯ Ð hà4ídoO«|Œ^€1Z™C Packages/com.unity.ugui/Runtime/UI/Core/Layout/AspectRatioFitter.cs ày¯ AspectRatioFitter „ using UnityEngine.EventSystems;
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namespace UnityEngine.UI
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{
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[AddComponentMenu("Layout/Aspect Ratio Fitter", 142)]
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[ExecuteAlways]
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[RequireComponent(typeof(RectTransform))]
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[DisallowMultipleComponent]
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/// <summary>
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/// Resizes a RectTransform to fit a specified aspect ratio.
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/// </summary>
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public class AspectRatioFitter : UIBehaviour, ILayoutSelfController
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{
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/// <summary>
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/// Specifies a mode to use to enforce an aspect ratio.
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/// </summary>
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public enum AspectMode
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{
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/// <summary>
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/// The aspect ratio is not enforced
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/// </summary>
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None,
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/// <summary>
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/// Changes the height of the rectangle to match the aspect ratio.
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/// </summary>
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WidthControlsHeight,
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/// <summary>
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/// Changes the width of the rectangle to match the aspect ratio.
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/// </summary>
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HeightControlsWidth,
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/// <summary>
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/// Sizes the rectangle such that it's fully contained within the parent rectangle.
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/// </summary>
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FitInParent,
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/// <summary>
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/// Sizes the rectangle such that the parent rectangle is fully contained within.
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/// </summary>
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EnvelopeParent
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}
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[SerializeField] private AspectMode m_AspectMode = AspectMode.None;
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/// <summary>
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/// The mode to use to enforce the aspect ratio.
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/// </summary>
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public AspectMode aspectMode { get { return m_AspectMode; } set { if (SetPropertyUtility.SetStruct(ref m_AspectMode, value)) SetDirty(); } }
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[SerializeField] private float m_AspectRatio = 1;
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/// <summary>
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/// The aspect ratio to enforce. This means width divided by height.
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/// </summary>
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public float aspectRatio { get { return m_AspectRatio; } set { if (SetPropertyUtility.SetStruct(ref m_AspectRatio, value)) SetDirty(); } }
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[System.NonSerialized]
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private RectTransform m_Rect;
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// This "delayed" mechanism is required for case 1014834.
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private bool m_DelayedSetDirty = false;
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private RectTransform rectTransform
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{
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get
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{
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if (m_Rect == null)
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m_Rect = GetComponent<RectTransform>();
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return m_Rect;
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}
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}
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private DrivenRectTransformTracker m_Tracker;
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protected AspectRatioFitter() {}
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protected override void OnEnable()
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{
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base.OnEnable();
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SetDirty();
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}
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protected override void OnDisable()
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{
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m_Tracker.Clear();
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LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
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base.OnDisable();
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}
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/// <summary>
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/// Update the rect based on the delayed dirty.
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/// Got around issue of calling onValidate from OnEnable function.
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/// </summary>
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protected virtual void Update()
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{
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if (m_DelayedSetDirty)
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{
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m_DelayedSetDirty = false;
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SetDirty();
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}
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}
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/// <summary>
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/// Function called when this RectTransform or parent RectTransform has changed dimensions.
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/// </summary>
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protected override void OnRectTransformDimensionsChange()
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{
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UpdateRect();
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}
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private void UpdateRect()
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{
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if (!IsActive())
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return;
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m_Tracker.Clear();
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switch (m_AspectMode)
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{
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#if UNITY_EDITOR
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case AspectMode.None:
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{
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if (!Application.isPlaying)
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m_AspectRatio = Mathf.Clamp(rectTransform.rect.width / rectTransform.rect.height, 0.001f, 1000f);
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break;
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}
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#endif
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case AspectMode.HeightControlsWidth:
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{
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m_Tracker.Add(this, rectTransform, DrivenTransformProperties.SizeDeltaX);
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rectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, rectTransform.rect.height * m_AspectRatio);
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break;
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}
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case AspectMode.WidthControlsHeight:
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{
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m_Tracker.Add(this, rectTransform, DrivenTransformProperties.SizeDeltaY);
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rectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, rectTransform.rect.width / m_AspectRatio);
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break;
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}
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case AspectMode.FitInParent:
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case AspectMode.EnvelopeParent:
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{
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m_Tracker.Add(this, rectTransform,
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DrivenTransformProperties.Anchors |
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DrivenTransformProperties.AnchoredPosition |
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DrivenTransformProperties.SizeDeltaX |
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DrivenTransformProperties.SizeDeltaY);
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rectTransform.anchorMin = Vector2.zero;
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rectTransform.anchorMax = Vector2.one;
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rectTransform.anchoredPosition = Vector2.zero;
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Vector2 sizeDelta = Vector2.zero;
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Vector2 parentSize = GetParentSize();
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if ((parentSize.y * aspectRatio < parentSize.x) ^ (m_AspectMode == AspectMode.FitInParent))
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{
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sizeDelta.y = GetSizeDeltaToProduceSize(parentSize.x / aspectRatio, 1);
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}
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else
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{
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sizeDelta.x = GetSizeDeltaToProduceSize(parentSize.y * aspectRatio, 0);
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}
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rectTransform.sizeDelta = sizeDelta;
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break;
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}
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}
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}
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private float GetSizeDeltaToProduceSize(float size, int axis)
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{
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return size - GetParentSize()[axis] * (rectTransform.anchorMax[axis] - rectTransform.anchorMin[axis]);
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}
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private Vector2 GetParentSize()
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{
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RectTransform parent = rectTransform.parent as RectTransform;
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if (!parent)
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return Vector2.zero;
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return parent.rect.size;
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}
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/// <summary>
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/// Method called by the layout system. Has no effect
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/// </summary>
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public virtual void SetLayoutHorizontal() {}
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/// <summary>
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/// Method called by the layout system. Has no effect
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/// </summary>
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public virtual void SetLayoutVertical() {}
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/// <summary>
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/// Mark the AspectRatioFitter as dirty.
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/// </summary>
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protected void SetDirty()
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{
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UpdateRect();
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}
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#if UNITY_EDITOR
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protected override void OnValidate()
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{
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m_AspectRatio = Mathf.Clamp(m_AspectRatio, 0.001f, 1000f);
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m_DelayedSetDirty = true;
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}
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