SceneHierarchyWindow

Internal reflection proxy for Unity's private UnityEditor.SceneHierarchyWindow. Provides programmatic control over scene expansion in the Hierarchy panel.

Definition

Namespace: Paragon.Core.SceneManagement.Editor.Internals Assembly: Paragon.Editor.dll

[InternalProxy("UnityEditor.SceneHierarchyWindow", "UnityEditor.CoreModule")]
internal class SceneHierarchyWindow : InternalProxy<SceneHierarchyWindow>

Inheritance: InternalProxy<SceneHierarchyWindow> → SceneHierarchyWindow

Remarks

SceneHierarchyWindow wraps Unity's internal SceneHierarchyWindow type using the InternalProxy<T> reflection pattern. This provides type-safe access to internal Unity APIs that are not publicly exposed.

The class is used by EditorSceneManager.RuntimeInitialize() to expand the active scene in the Hierarchy panel when entering play mode, ensuring the developer can see the scene's contents immediately.

All methods operate on the lastInteractedHierarchyWindow — the most recently focused Hierarchy panel. If no Hierarchy window exists, operations are safely no-ops (guarded by null-conditional ?. access).

Properties

lastInteractedHierarchyWindow

public static SceneHierarchyWindow lastInteractedHierarchyWindow { get; }

Gets the most recently interacted Hierarchy window, wrapped as a proxy. Returns null if no Hierarchy window is open.

Constructors

SceneHierarchyWindow

public SceneHierarchyWindow(object target) : base(target)

Parameter	Type	Description
target	object	The underlying Unity SceneHierarchyWindow instance

Methods

SetExpanded

Sets whether a scene's hierarchy is expanded (collapsed/expanded) in the Hierarchy panel.

public static void SetExpanded(Scene scene, bool expanded)

Parameter	Type	Description
scene	Scene	The scene to expand or collapse
expanded	bool	true to expand, false to collapse

SetExpandedRecursive

Sets whether a scene and all its children are expanded recursively.

public static void SetExpandedRecursive(Scene scene, bool expanded)

Parameter	Type	Description
scene	Scene	The scene to expand or collapse recursively
expanded	bool	true to expand all, false to collapse all

GetAllSceneHierarchyWindows

Returns all open Hierarchy windows as proxied instances.

public static IEnumerable<SceneHierarchyWindow> GetAllSceneHierarchyWindows()

Returns: All open SceneHierarchyWindow instances wrapped as proxies.

Common Pitfalls

Null-safe via lastInteractedHierarchyWindow All static methods access lastInteractedHierarchyWindow with null-conditional operators. If no Hierarchy window exists, calls silently do nothing.

Reflection-based — may break on Unity version changes This class accesses Unity internal APIs via reflection. Method signatures or type names may change between Unity versions.

See Also

• EditorSceneManager — Calls SetExpanded() during play mode initialization

• InternalProxy<T> — Base class providing cached reflection access to internal Unity types