koobas.hobune.stream
Expand active children in Hierarchy
I know I can Alt-click on the arrow next to an object in the Hierarchy to recursively expand it's children. But is there a way for me to do that only to children that are active (GameObject.activeSelf == true)?
When I'm working on UI, I have lots of inactive elements. I'd like to only expand the currently visible parts to make it easier to see the hierarchy as a representation of what's in the Game view.
Best Answer
Thanks to some answers here, I figured something out:
public static class HierarchyOrganizer
{
// Expand recursively and collapse any inactive GameObjects in
// selection and children.
[MenuItem("GameObject/Expand Active Children", false, 46)]
static void Menu_ExpandActiveChildren()
{
EditorApplication.ExecuteMenuItem("Window/General/Hierarchy");
var hierarchy_window = EditorWindow.focusedWindow;
// Use transforms so it only works for hierarchy view.
foreach (var t in Selection.transforms)
{
ExpandActiveChildren(t.gameObject, hierarchy_window);
}
}
static void ExpandActiveChildren(GameObject parent, EditorWindow hierarchy_window)
{
SetExpandedRecursive(parent, true, hierarchy_window);
for (int i = 0; i < parent.transform.childCount; ++i)
{
var t = parent.transform.GetChild(i);
var obj = t.gameObject;
bool is_active = t.gameObject.activeSelf;
SetExpandedRecursive(obj, is_active, hierarchy_window);
//~ Debug.Log(string.Format("Setting hierarchy for {0} expanding={1}", obj.name, is_active), obj);
if (is_active)
{
ExpandActiveChildren(obj, hierarchy_window);
}
}
}
// https://answers.unity.com/questions/656869/foldunfold-gameobject-from-code.html
static void SetExpandedRecursive(GameObject go, bool expand, EditorWindow hierarchy_window)
{
var type = typeof(EditorWindow).Assembly.GetType("UnityEditor.SceneHierarchyWindow");
// There's no exposed nonrecursive function in 2018, so call the
// recursive one instead.
var methodInfo = type.GetMethod("SetExpandedRecursive");
Debug.Assert(methodInfo != null, "Failed to find SetExpandedRecursive. Maybe it changed in this version of Unity.");
methodInfo.Invoke(hierarchy_window, new object[] { go.GetInstanceID (), expand });
}
}
}
