107 lines
4.0 KiB
C#
107 lines
4.0 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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using UnityEditorInternal;
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using UnityEditor.AnimatedValues;
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namespace UnityEditor.UI
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{
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[CustomEditor(typeof(LayoutElement), true)]
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[CanEditMultipleObjects]
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/// <summary>
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/// Custom editor for the LayoutElement component
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/// Extend this class to write a custom editor for a component derived from LayoutElement.
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/// </summary>
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public class LayoutElementEditor : Editor
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{
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SerializedProperty m_IgnoreLayout;
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SerializedProperty m_MinWidth;
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SerializedProperty m_MinHeight;
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SerializedProperty m_PreferredWidth;
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SerializedProperty m_PreferredHeight;
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SerializedProperty m_FlexibleWidth;
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SerializedProperty m_FlexibleHeight;
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SerializedProperty m_LayoutPriority;
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protected virtual void OnEnable()
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{
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m_IgnoreLayout = serializedObject.FindProperty("m_IgnoreLayout");
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m_MinWidth = serializedObject.FindProperty("m_MinWidth");
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m_MinHeight = serializedObject.FindProperty("m_MinHeight");
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m_PreferredWidth = serializedObject.FindProperty("m_PreferredWidth");
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m_PreferredHeight = serializedObject.FindProperty("m_PreferredHeight");
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m_FlexibleWidth = serializedObject.FindProperty("m_FlexibleWidth");
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m_FlexibleHeight = serializedObject.FindProperty("m_FlexibleHeight");
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m_LayoutPriority = serializedObject.FindProperty("m_LayoutPriority");
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}
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public override void OnInspectorGUI()
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{
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serializedObject.Update();
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EditorGUILayout.PropertyField(m_IgnoreLayout);
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if (!m_IgnoreLayout.boolValue)
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{
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EditorGUILayout.Space();
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LayoutElementField(m_MinWidth, 0);
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LayoutElementField(m_MinHeight, 0);
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LayoutElementField(m_PreferredWidth, t => t.rect.width);
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LayoutElementField(m_PreferredHeight, t => t.rect.height);
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LayoutElementField(m_FlexibleWidth, 1);
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LayoutElementField(m_FlexibleHeight, 1);
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}
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EditorGUILayout.PropertyField(m_LayoutPriority);
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serializedObject.ApplyModifiedProperties();
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}
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void LayoutElementField(SerializedProperty property, float defaultValue)
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{
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LayoutElementField(property, _ => defaultValue);
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}
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void LayoutElementField(SerializedProperty property, System.Func<RectTransform, float> defaultValue)
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{
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Rect position = EditorGUILayout.GetControlRect();
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// Label
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GUIContent label = EditorGUI.BeginProperty(position, null, property);
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// Rects
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Rect fieldPosition = EditorGUI.PrefixLabel(position, label);
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Rect toggleRect = fieldPosition;
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toggleRect.width = 16;
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Rect floatFieldRect = fieldPosition;
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floatFieldRect.xMin += 16;
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// Checkbox
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EditorGUI.BeginChangeCheck();
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bool enabled = EditorGUI.ToggleLeft(toggleRect, GUIContent.none, property.floatValue >= 0);
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if (EditorGUI.EndChangeCheck())
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{
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// This could be made better to set all of the targets to their initial width, but mimizing code change for now
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property.floatValue = (enabled ? defaultValue((target as LayoutElement).transform as RectTransform) : -1);
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}
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if (!property.hasMultipleDifferentValues && property.floatValue >= 0)
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{
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// Float field
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EditorGUIUtility.labelWidth = 4; // Small invisible label area for drag zone functionality
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EditorGUI.BeginChangeCheck();
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float newValue = EditorGUI.FloatField(floatFieldRect, new GUIContent(" "), property.floatValue);
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if (EditorGUI.EndChangeCheck())
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{
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property.floatValue = Mathf.Max(0, newValue);
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}
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EditorGUIUtility.labelWidth = 0;
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}
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EditorGUI.EndProperty();
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}
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}
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}
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