52 lines
1.4 KiB
C#
52 lines
1.4 KiB
C#
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#if UNITY_EDITOR
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using System;
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using UnityEditor.IMGUI.Controls;
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namespace UnityEngine.InputSystem.Editor
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{
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/// <summary>
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/// Extension methods for working with tree views.
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/// </summary>
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/// <seealso cref="TreeView"/>
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internal static class TreeViewHelpers
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{
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public static TItem TryFindItemInHierarchy<TItem>(this TreeViewItem item)
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where TItem : TreeViewItem
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{
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while (item != null)
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{
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if (item is TItem result)
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return result;
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item = item.parent;
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}
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return null;
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}
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public static bool IsParentOf(this TreeViewItem parent, TreeViewItem child)
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{
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if (parent == null)
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throw new ArgumentNullException(nameof(parent));
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if (child == null)
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throw new ArgumentNullException(nameof(child));
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do
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{
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child = child.parent;
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}
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while (child != null && child != parent);
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return child != null;
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}
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public static void ExpandChildren(this TreeView treeView, TreeViewItem item)
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{
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if (!item.hasChildren)
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return;
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foreach (var child in item.children)
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treeView.SetExpanded(child.id, true);
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}
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}
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}
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#endif // UNITY_EDITOR
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