/// <summary>
/// Sets parent Transform of child, with option to skip Hierarchy Folders.
/// When <paramref name="skipHierarchyFolders"/> is false will also automatically handle Flatten Hierarchy play mode behaviour (when enabled in preferences).
/// </summary>
/// <param name="child"> Child whose parent is being set. </param>
/// <param name="parent"> New parent for child. </param>
/// <param name="worldPositionStays"></param>
/// <param name="skipHierarchyFolders">
/// If true then Hierarchy Folders will be skipped when determining the parent. If <paramref name="parent"/> and all parents it might have are hierarchy folders,
/// then <paramref name="child"/> will be moved to hierarchy root.
/// </param>
public static void SetParent([NotNull] this Transform child, [CanBeNull] Transform parent, bool worldPositionStays, bool skipHierarchyFolders)
{
#if UNITY_EDITOR
if (parent != null && parent.gameObject.IsHierarchyFolder())
{
if (skipHierarchyFolders)
{
child.SetParent(parent.GetParent(true), worldPositionStays);
}
else if (HierarchyFolderPreferences.FlattenHierarchy)
{
int moveToIndex = HierarchyFolderUtility.GetLastChildIndexInFlatMode(parent.gameObject);
var parentOfFolder = parent.parent;
child.transform.SetParent(parentOfFolder, worldPositionStays);
if (moveToIndex < 0)
{
#if DEV_MODE
Debug.LogWarning("GetLastChildIndexInFlatMode result < 0");
#endif
return;
}
child.transform.SetSiblingIndex(moveToIndex);
return;
}
}
#endif
child.transform.SetParent(parent, worldPositionStays);
}
private void OnHierarchyChangedInPlayModeFlattened()
{
if (this == null)
{
EditorApplication.hierarchyChanged -= OnHierarchyChangedInPlayModeFlattened;
return;
}
OnHierarchyChangedShared();
#if DEV_MODE
if (transform.childCount > 0)
{
if (HierarchyFolderUtility.NowStripping)
{
Debug.LogWarning(name + " child count is " + transform.childCount + " but won't flatten because HierarchyFolderUtility.NowStripping already true.", gameObject);
}
else
{
Debug.Log(name + " child count " + transform.childCount + ". Flattening now...", gameObject);
}
}
#endif
if (transform.childCount > 0 && !HierarchyFolderUtility.NowStripping)
{
int moveToIndex = HierarchyFolderUtility.GetLastChildIndexInFlatMode(gameObject);
for (int n = transform.childCount - 1; n >= 0; n--)
{
var child = transform.GetChild(n);
child.SetParent(null, true);
child.SetSiblingIndex(moveToIndex);
}
}
}
internal static void CreateHierarchyFolderParent()
{
int count = Selection.transforms.Length;
var members = new Transform[count];
Array.Copy(Selection.transforms, 0, members, 0, count);
Array.Sort(members, SortByHierarchyOrder);
var firstMember = members[0];
var hierarchyFolderParent = firstMember.parent;
var folder = CreateHierarchyFolderInternal(firstMember is RectTransform);
// if not all selected have the same parent, then create folders as last item in hierarchy
for (int n = 1; n < count; n++)
{
if (members[n].parent != hierarchyFolderParent)
{
hierarchyFolderParent = null;
break;
}
}
if (hierarchyFolderParent != null)
{
folder.transform.UndoableSetParent(hierarchyFolderParent, "Hierarchy Folder Parent");
}
int hierarchyFolderSiblingIndex = firstMember.GetSiblingIndex();
folder.transform.SetSiblingIndex(hierarchyFolderSiblingIndex);
Undo.RegisterCreatedObjectUndo(folder, "Hierarchy Folder Parent");
#if UNITY_EDITOR
if (EditorApplication.isPlayingOrWillChangePlaymode && HierarchyFolderPreferences.Get().playModeBehaviour == StrippingType.FlattenHierarchy)
{
int moveToIndex = HierarchyFolderUtility.GetLastChildIndexInFlatMode(folder);
for (int n = count - 1; n >= 0; n--)
{
Undo.SetTransformParent(members[n], hierarchyFolderParent, "Hierarchy Folder Parent");
members[n].SetSiblingIndex(moveToIndex);
}
return;
}
#endif
for (int n = 0; n < count; n++)
{
Undo.SetTransformParent(members[n], folder.transform, "Hierarchy Folder Parent");
members[n].SetAsLastSibling();
}
Selection.activeGameObject = folder;
}
/// <summary>
/// Sets parent Transform of child, with option to skip Hierarchy Folders.
/// When <paramref name="skipHierarchyFolders"/> is false will also automatically handle Flatten Hierarchy play mode behaviour (when enabled in preferences).
/// </summary>
/// <param name="child"> Child whose parent is being set. </param>
/// <param name="parent"> New parent for child. </param>
/// <param name="worldPositionStays"></param>
/// <param name="skipHierarchyFolders">
/// If true then Hierarchy Folders will be skipped when determining the parent. If <paramref name="parent"/> and all parents it might have are hierarchy folders,
/// then <paramref name="child"/> will be moved to hierarchy root.
/// </param>
public static void UndoableSetParent([NotNull] this Transform child, [CanBeNull] Transform parent, string undoName, bool skipHierarchyFolders = false)
{
#if UNITY_EDITOR
if (parent != null && parent.gameObject.IsHierarchyFolder())
{
if (skipHierarchyFolders)
{
if (!Application.isPlaying)
{
Undo.SetTransformParent(child, parent.GetParent(true), undoName); //NOTE: Doesn't support worldPositionStays=false
}
else
{
child.SetParent(parent.GetParent(true), true);
}
}
else if (HierarchyFolderPreferences.FlattenHierarchy)
{
int moveToIndex = HierarchyFolderUtility.GetLastChildIndexInFlatMode(parent.gameObject);
var parentOfFolder = parent.parent;
if (!Application.isPlaying)
{
Undo.SetTransformParent(child, parentOfFolder, undoName); //NOTE: Doesn't support worldPositionStays=false
}
else
{
child.transform.SetParent(parentOfFolder, true);
}
if (moveToIndex < 0)
{
#if DEV_MODE
Debug.LogWarning("GetLastChildIndexInFlatMode result < 0");
#endif
return;
}
child.transform.SetSiblingIndex(moveToIndex);
return;
}
}
if (!Application.isPlaying)
{
Undo.SetTransformParent(child, parent, undoName);
return;
}
#endif
child.transform.SetParent(parent, true);
}
private void OnHierarchyChangedInPlayModeFlattened()
{
hierarchyFolders.RemoveAll(isNull);
hierarchyFolders.Sort(compareHierarchyDepth);
for (int n = 0, count = hierarchyFolders.Count - 1; n < count; n++)
{
var hierarchyFolder = hierarchyFolders[n];
// Only process scene objects, not prefabs.
if (!hierarchyFolder.gameObject.scene.IsValid())
{
continue;
}
OnHierarchyChangedShared(hierarchyFolder);
var transform = hierarchyFolder.transform;
#if DEV_MODE
if (transform.childCount > 0)
{
if (HierarchyFolderUtility.NowStripping)
{
Debug.LogWarning(hierarchyFolder.name + " child count is " + transform.childCount + " but won't flatten because HierarchyFolderUtility.NowStripping already true.", hierarchyFolder);
}
else
{
Debug.Log(hierarchyFolder.name + " child count " + transform.childCount + ". Flattening now...", hierarchyFolder);
}
}
#endif
if (transform.childCount > 0 && !HierarchyFolderUtility.NowStripping)
{
// todo: should we keep track of flattened children in play mode? Or only for prefabs?
// Would there be benefits to keeping track of them?
// Could select them when hierarchy folder is double clicked in hierarchy view?
// Could draw some sort of bounds around the children in the hierarchy?!!!
int moveToIndex = HierarchyFolderUtility.GetLastChildIndexInFlatMode(transform.gameObject);
for (int c = transform.childCount - 1; c >= 0; c--)
{
var child = transform.GetChild(c);
child.SetParent(null, true);
child.SetSiblingIndex(moveToIndex);
}
}
}
hierarchyFolders.RemoveAll(isNull);
}