# getNewSelectionOverride

> Register a callback to this field to override how the TreeView handles selection changes in response to keys and mouse clicks.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.IMGUI.Controls](/engine/6000.5/script-reference/unityeditor/imgui/controls.md)
* **Assembly:** UnityEditor.CoreModule

> **Warning:**
>
> **Removed.** TreeView is now deprecated. You can likely now use TreeView\\\<int\\> instead and not think more about it. But if you were using that identifier to store InstanceID data, you should instead opt to upgrade your TreeViews to use TreeView\\\<InstanceID\\> to get the proper typing.

```csharp
protected TreeView.GetNewSelectionFunction getNewSelectionOverride { set; }
```

### Remarks

Additional Resources: [TreeView.GetNewSelectionFunction](/engine/6000.5/script-reference/unityeditor/imgui/controls/treeview/getnewselectionfunction.md).