Version: 2017.4
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TreeView.SetExpandedRecursive

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public method SetExpandedRecursive(id: int, expanded: bool): void;
public void SetExpandedRecursive(int id, bool expanded);

Parameters

idTreeViewItem ID.
expandedExpanded state: true expands, false collapses.

Description

Expand or collapse all items under item with id.

This is also used internally when Alt/Option + clicking an foldout arrow of an item to expand/collapse the entire sub-tree under this item.

Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.

Copyright © 2020 Unity Technologies. Publication Date: 2020-06-05.
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