128 lines
5.5 KiB
C#
128 lines
5.5 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using UnityEngine;
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using UnityEngine.UI;
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using System.Globalization;
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namespace UnityEditor.Events
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{
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[CustomPreview(typeof(GameObject))]
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/// <summary>
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/// Custom preview drawing that will draw the layout properties of a given object.
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/// </summary>
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class LayoutPropertiesPreview : ObjectPreview
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{
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private const float kLabelWidth = 110;
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private const float kValueWidth = 100;
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class Styles
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{
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public GUIStyle labelStyle = new GUIStyle(EditorStyles.label);
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public GUIStyle headerStyle = new GUIStyle(EditorStyles.boldLabel);
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public Styles()
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{
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labelStyle.padding.right += 4;
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headerStyle.padding.right += 4;
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}
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}
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private GUIContent m_Title;
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private Styles m_Styles = new Styles();
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public override void Initialize(UnityEngine.Object[] targets)
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{
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base.Initialize(targets);
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}
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public override GUIContent GetPreviewTitle()
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{
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if (m_Title == null)
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{
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m_Title = EditorGUIUtility.TrTextContent("Layout Properties");
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}
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return m_Title;
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}
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public override bool HasPreviewGUI()
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{
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GameObject go = target as GameObject;
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if (!go)
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return false;
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// Prevent allocations in the editor by using TryGetComponent
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ILayoutElement layoutElement;
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return go.TryGetComponent(out layoutElement);
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}
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public override void OnPreviewGUI(Rect r, GUIStyle background)
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{
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if (Event.current.type != EventType.Repaint)
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return;
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if (m_Styles == null)
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m_Styles = new Styles();
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GameObject go = target as GameObject;
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RectTransform rect = go.transform as RectTransform;
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if (rect == null)
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return;
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// Apply padding
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RectOffset previewPadding = new RectOffset(-5, -5, -5, -5);
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r = previewPadding.Add(r);
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// Prepare rects for columns
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r.height = EditorGUIUtility.singleLineHeight;
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Rect labelRect = r;
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Rect valueRect = r;
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Rect sourceRect = r;
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labelRect.width = kLabelWidth;
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valueRect.xMin += kLabelWidth;
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valueRect.width = kValueWidth;
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sourceRect.xMin += kLabelWidth + kValueWidth;
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// Headers
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GUI.Label(labelRect, "Property", m_Styles.headerStyle);
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GUI.Label(valueRect, "Value", m_Styles.headerStyle);
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GUI.Label(sourceRect, "Source", m_Styles.headerStyle);
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labelRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
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valueRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
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sourceRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
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// Prepare reusable variable for out argument
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ILayoutElement source = null;
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// Show properties
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Min Width", LayoutUtility.GetLayoutProperty(rect, e => e.minWidth, 0, out source).ToString(CultureInfo.InvariantCulture.NumberFormat), source);
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Min Height", LayoutUtility.GetLayoutProperty(rect, e => e.minHeight, 0, out source).ToString(CultureInfo.InvariantCulture.NumberFormat), source);
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Preferred Width", LayoutUtility.GetLayoutProperty(rect, e => e.preferredWidth, 0, out source).ToString(CultureInfo.InvariantCulture.NumberFormat), source);
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Preferred Height", LayoutUtility.GetLayoutProperty(rect, e => e.preferredHeight, 0, out source).ToString(CultureInfo.InvariantCulture.NumberFormat), source);
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float flexible = 0;
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flexible = LayoutUtility.GetLayoutProperty(rect, e => e.flexibleWidth, 0, out source);
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Flexible Width", flexible > 0 ? ("enabled (" + flexible.ToString(CultureInfo.InvariantCulture.NumberFormat) + ")") : "disabled", source);
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flexible = LayoutUtility.GetLayoutProperty(rect, e => e.flexibleHeight, 0, out source);
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ShowProp(ref labelRect, ref valueRect, ref sourceRect, "Flexible Height", flexible > 0 ? ("enabled (" + flexible.ToString(CultureInfo.InvariantCulture.NumberFormat) + ")") : "disabled", source);
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if (!rect.GetComponent<LayoutElement>())
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{
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Rect noteRect = new Rect(labelRect.x, labelRect.y + 10, r.width, EditorGUIUtility.singleLineHeight);
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GUI.Label(noteRect, "Add a LayoutElement to override values.", m_Styles.labelStyle);
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}
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}
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private void ShowProp(ref Rect labelRect, ref Rect valueRect, ref Rect sourceRect, string label, string value, ILayoutElement source)
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{
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GUI.Label(labelRect, label, m_Styles.labelStyle);
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GUI.Label(valueRect, value, m_Styles.labelStyle);
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GUI.Label(sourceRect, source == null ? "none" : source.GetType().Name, m_Styles.labelStyle);
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labelRect.y += EditorGUIUtility.singleLineHeight;
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valueRect.y += EditorGUIUtility.singleLineHeight;
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sourceRect.y += EditorGUIUtility.singleLineHeight;
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}
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}
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}
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