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18a519f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | #if UNITY_EDITOR
using System;
using UnityEditor.IMGUI.Controls;
namespace UnityEngine.InputSystem.Editor
{
/// <summary>
/// Extension methods for working with tree views.
/// </summary>
/// <seealso cref="TreeView"/>
internal static class TreeViewHelpers
{
public static TItem TryFindItemInHierarchy<TItem>(this TreeViewItem item)
where TItem : TreeViewItem
{
while (item != null)
{
if (item is TItem result)
return result;
item = item.parent;
}
return null;
}
public static bool IsParentOf(this TreeViewItem parent, TreeViewItem child)
{
if (parent == null)
throw new ArgumentNullException(nameof(parent));
if (child == null)
throw new ArgumentNullException(nameof(child));
do
{
child = child.parent;
}
while (child != null && child != parent);
return child != null;
}
public static void ExpandChildren(this TreeView treeView, TreeViewItem item)
{
if (!item.hasChildren)
return;
foreach (var child in item.children)
treeView.SetExpanded(child.id, true);
}
}
}
#endif // UNITY_EDITOR
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