private void SetIndent(VirtualizingTreeViewItem parent, ref int itemIndex)
{
while (true)
{
object obj = TreeView.GetItemAt(itemIndex + 1);
VirtualizingTreeViewItem child = (VirtualizingTreeViewItem)TreeView.GetItemContainer(obj);
if (child == null)
{
return;
}
if (child.Item == null)
{
return;
}
if (child.Parent != parent.m_treeViewItemData)
{
return;
}
child.m_treeViewItemData.Indent = parent.m_treeViewItemData.Indent + TreeView.Indent;
if (child.m_itemLayout != null && child.m_itemLayout.padding != null)
{
child.m_itemLayout.padding.left = child.m_treeViewItemData.Indent;
}
itemIndex++;
SetIndent(child, ref itemIndex);
}
}
void IEndDragHandler.OnEndDrag(PointerEventData eventData)
{
if (this.TreeView.DropTarget != null)
{
GameObject dropTarget = (GameObject)this.TreeView.DropTarget;
GameObject gameObject = new GameObject();
VirtualizingTreeViewItem itemContainer1 = (VirtualizingTreeViewItem)this.TreeView.GetItemContainer(this.TreeView.DropTarget);
if (this.TreeView.DropAction == ItemDropAction.SetLastChild)
{
gameObject.get_transform().SetParent(dropTarget.get_transform());
this.TreeView.AddChild(this.TreeView.DropTarget, (object)gameObject);
itemContainer1.CanExpand = true;
itemContainer1.IsExpanded = true;
}
else if (this.TreeView.DropAction != ItemDropAction.None)
{
int index = this.TreeView.DropAction != ItemDropAction.SetNextSibling ? this.TreeView.IndexOf((object)dropTarget) : this.TreeView.IndexOf((object)dropTarget) + 1;
gameObject.get_transform().SetParent(dropTarget.get_transform().get_parent());
gameObject.get_transform().SetSiblingIndex(index);
TreeViewItemContainerData itemContainerData = (TreeViewItemContainerData)this.TreeView.Insert(index, (object)gameObject);
VirtualizingTreeViewItem itemContainer2 = (VirtualizingTreeViewItem)this.TreeView.GetItemContainer((object)gameObject);
if (Object.op_Inequality((Object)itemContainer2, (Object)null))
{
itemContainer2.Parent = itemContainer1.Parent;
}
else
{
itemContainerData.Parent = itemContainer1.Parent;
}
}
}
this.TreeView.ExternalItemDrop();
}
protected override void SetNextSiblingInternal(ItemContainerData sibling, ItemContainerData nextSibling)
{
TreeViewItemContainerData tvSibling = (TreeViewItemContainerData)sibling;
TreeViewItemContainerData lastDescendant = tvSibling.LastDescendant(this);
if (lastDescendant == null)
{
lastDescendant = tvSibling;
}
TreeViewItemContainerData tvItemData = (TreeViewItemContainerData)nextSibling;
TreeViewItemContainerData dragItemChild = tvItemData.FirstChild(this);
base.SetNextSiblingInternal(lastDescendant, nextSibling);
if (dragItemChild != null)
{
MoveSubtree(tvItemData, dragItemChild);
}
SetParent(tvSibling.Parent, tvItemData);
VirtualizingTreeViewItem tvItem = (VirtualizingTreeViewItem)GetItemContainer(tvItemData.Item);
if (tvItem != null)
{
tvItem.UpdateIndent();
}
}
private void MoveSubtree(TreeViewItemContainerData parent, TreeViewItemContainerData child)
{
int num = this.IndexOf(parent.Item);
int siblingIndex = this.IndexOf(child.Item);
bool flag = false;
if (num < siblingIndex)
{
flag = true;
}
TreeViewItemContainerData itemContainerData = parent;
VirtualizingTreeViewItem itemContainer1 = (VirtualizingTreeViewItem)this.GetItemContainer(itemContainerData.Item);
if (Object.op_Inequality((Object)itemContainer1, (Object)null))
{
itemContainer1.UpdateIndent();
}
for (; child != null && child.IsDescendantOf(parent) && itemContainerData != child; child = (TreeViewItemContainerData)this.GetItemContainerData(siblingIndex))
{
base.SetNextSiblingInternal((ItemContainerData)itemContainerData, (ItemContainerData)child);
VirtualizingTreeViewItem itemContainer2 = (VirtualizingTreeViewItem)this.GetItemContainer(child.Item);
if (Object.op_Inequality((Object)itemContainer2, (Object)null))
{
itemContainer2.UpdateIndent();
}
itemContainerData = child;
if (flag)
{
++siblingIndex;
}
}
}
public override void SetPosition(Vector2 position)
{
if (Object.op_Equality((Object)this.Item, (Object)null))
{
return;
}
if (!this.m_treeView.CanReparent)
{
base.SetPosition(position);
}
else
{
RectTransform rectTransform1 = this.Item.RectTransform;
VirtualizingTreeViewItem virtualizingTreeViewItem = (VirtualizingTreeViewItem)this.Item;
Vector2 sizeDelta = this.m_rectTransform.get_sizeDelta();
ref Vector2 local1 = ref sizeDelta;
Rect rect1 = rectTransform1.get_rect();
double height1 = (double)((Rect) ref rect1).get_height();
local1.y = (__Null)height1;
if (this.m_useGrid)
{
ref Vector2 local2 = ref sizeDelta;
Rect rect2 = rectTransform1.get_rect();
double width = (double)((Rect) ref rect2).get_width();
local2.x = (__Null)width;
}
public override void DataBindItem(object item, VirtualizingItemContainer itemContainer)
{
itemContainer.Clear();
if (item != null)
{
VirtualizingTreeViewItemDataBindingArgs args = new VirtualizingTreeViewItemDataBindingArgs();
args.Item = item;
args.ItemPresenter = !Object.op_Equality((Object)itemContainer.ItemPresenter, (Object)null) ? itemContainer.ItemPresenter : ((Component)this).get_gameObject();
args.EditorPresenter = !Object.op_Equality((Object)itemContainer.EditorPresenter, (Object)null) ? itemContainer.EditorPresenter : ((Component)this).get_gameObject();
this.RaiseItemDataBinding(args);
VirtualizingTreeViewItem virtualizingTreeViewItem = (VirtualizingTreeViewItem)itemContainer;
virtualizingTreeViewItem.CanExpand = args.HasChildren;
virtualizingTreeViewItem.CanEdit = this.CanEdit && args.CanEdit;
virtualizingTreeViewItem.CanDrag = this.CanDrag && args.CanDrag;
virtualizingTreeViewItem.CanBeParent = args.CanBeParent;
virtualizingTreeViewItem.UpdateIndent();
}
else
{
VirtualizingTreeViewItem virtualizingTreeViewItem = (VirtualizingTreeViewItem)itemContainer;
virtualizingTreeViewItem.CanExpand = false;
virtualizingTreeViewItem.CanEdit = false;
virtualizingTreeViewItem.CanDrag = false;
virtualizingTreeViewItem.UpdateIndent();
}
}
public override void DataBindItem(object item, VirtualizingItemContainer itemContainer)
{
itemContainer.Clear();
if (item != null)
{
VirtualizingTreeViewItemDataBindingArgs args = new VirtualizingTreeViewItemDataBindingArgs();
args.Item = item;
args.ItemPresenter = itemContainer.ItemPresenter == null ? gameObject : itemContainer.ItemPresenter;
args.EditorPresenter = itemContainer.EditorPresenter == null ? gameObject : itemContainer.EditorPresenter;
RaiseItemDataBinding(args);
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)itemContainer;
treeViewItem.CanExpand = args.HasChildren;
treeViewItem.CanEdit = CanEdit && args.CanEdit;
treeViewItem.CanDrag = CanDrag && args.CanDrag;
treeViewItem.CanBeParent = args.CanBeParent;
treeViewItem.CanChangeParent = args.CanChangeParent;
treeViewItem.UpdateIndent();
}
else
{
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)itemContainer;
treeViewItem.CanExpand = false;
treeViewItem.CanEdit = false;
treeViewItem.CanDrag = false;
treeViewItem.CanBeParent = false;
treeViewItem.CanChangeParent = false;
treeViewItem.UpdateIndent();
}
}
public void RemoveChild(object parent, object item, bool isLastChild)
{
if (parent == null)
{
base.Remove(item);
}
else
{
if (GetItemContainer(item) != null)
{
base.Remove(item);
}
else
{
//Parent item is not expanded (if isLastChild just remove parent expander)
if (isLastChild)
{
VirtualizingTreeViewItem parentContainer = (VirtualizingTreeViewItem)GetItemContainer(parent);
if (parentContainer)
{
parentContainer.CanExpand = false;
}
}
}
}
}
public void Internal_Expand(object item)
{
TreeViewItemContainerData treeViewItemData = (TreeViewItemContainerData)GetItemContainerData(item);
if (treeViewItemData == null)
{
throw new ArgumentException("TreeViewItemContainerData not found", "item");
}
if (treeViewItemData.IsExpanded)
{
return;
}
treeViewItemData.IsExpanded = true;
if (m_expandSilently)
{
return;
}
if (ItemExpanding != null)
{
VirtualizingItemExpandingArgs args = new VirtualizingItemExpandingArgs(treeViewItemData.Item);
ItemExpanding(this, args);
IEnumerable children = args.Children == null ? null : args.Children.OfType <object>().ToArray();
int itemIndex = IndexOf(treeViewItemData.Item);
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)GetItemContainer(treeViewItemData.Item);
if (treeViewItem != null)
{
treeViewItem.CanExpand = children != null;
}
else
{
treeViewItemData.CanExpand = children != null;
}
if (treeViewItemData.CanExpand)
{
foreach (object childItem in children)
{
itemIndex++;
TreeViewItemContainerData childData = (TreeViewItemContainerData)Insert(itemIndex, childItem);
VirtualizingTreeViewItem childContainer = (VirtualizingTreeViewItem)GetItemContainer(childItem);
if (childContainer != null)
{
childContainer.Parent = treeViewItemData;
}
else
{
childData.Parent = treeViewItemData;
}
}
UpdateSelectedItemIndex();
}
}
}
public void AddChild(object parent, object item)
{
if (parent == null)
{
this.Add(item);
}
else
{
VirtualizingTreeViewItem itemContainer1 = (VirtualizingTreeViewItem)this.GetItemContainer(parent);
int index = -1;
TreeViewItemContainerData itemContainerData1;
if (Object.op_Equality((Object)itemContainer1, (Object)null))
{
itemContainerData1 = (TreeViewItemContainerData)this.GetItemContainerData(parent);
if (itemContainerData1 == null)
{
Debug.LogWarning((object)"Lost parent data");
return;
}
if (itemContainerData1.IsExpanded)
{
index = !itemContainerData1.HasChildren(this) ? this.IndexOf(itemContainerData1.Item) + 1 : this.IndexOf(itemContainerData1.LastDescendant(this).Item) + 1;
}
else
{
itemContainerData1.CanExpand = true;
}
}
else
{
if (itemContainer1.IsExpanded)
{
index = !itemContainer1.HasChildren ? this.IndexOf(itemContainer1.Item) + 1 : this.IndexOf(itemContainer1.LastDescendant().Item) + 1;
}
else
{
itemContainer1.CanExpand = true;
}
itemContainerData1 = itemContainer1.TreeViewItemData;
}
if (index <= -1)
{
return;
}
TreeViewItemContainerData itemContainerData2 = (TreeViewItemContainerData)this.Insert(index, item);
VirtualizingTreeViewItem itemContainer2 = (VirtualizingTreeViewItem)this.GetItemContainer(item);
if (Object.op_Inequality((Object)itemContainer2, (Object)null))
{
itemContainer2.Parent = itemContainerData1;
}
else
{
itemContainerData2.Parent = itemContainerData1;
}
}
}
public void UpdateIndent(object obj)
{
VirtualizingTreeViewItem itemContainer = (VirtualizingTreeViewItem)this.GetItemContainer(obj);
if (Object.op_Equality((Object)itemContainer, (Object)null))
{
return;
}
itemContainer.UpdateIndent();
}
/// <summary>
/// Add data item as last child of parent
/// </summary>
/// <param name="parent">parent data item</param>
/// <param name="item">data item to add</param>
public void AddChild(object parent, object item)
{
if (parent == null)
{
Add(item);
}
else
{
TreeViewItemContainerData parentContainerData = (TreeViewItemContainerData)GetItemContainerData(parent);
if (parentContainerData == null)
{
return;
}
int index = -1;
if (parentContainerData.IsExpanded)
{
if (parentContainerData.HasChildren(this))
{
TreeViewItemContainerData lastDescendant = parentContainerData.LastDescendant(this);
index = IndexOf(lastDescendant.Item) + 1;
}
else
{
index = IndexOf(parentContainerData.Item) + 1;
}
}
else
{
VirtualizingTreeViewItem parentContainer = (VirtualizingTreeViewItem)GetItemContainer(parent);
if (parentContainer != null)
{
parentContainer.CanExpand = true;
}
else
{
parentContainerData.CanExpand = true;
}
}
if (index > -1)
{
TreeViewItemContainerData addedItemData = (TreeViewItemContainerData)Insert(index, item);
VirtualizingTreeViewItem addedTreeViewItem = (VirtualizingTreeViewItem)GetItemContainer(item);
if (addedTreeViewItem != null)
{
addedTreeViewItem.Parent = parentContainerData;
}
else
{
addedItemData.Parent = parentContainerData;
}
}
}
}
public void UpdateIndent(object obj)
{
VirtualizingTreeViewItem item = (VirtualizingTreeViewItem)GetItemContainer(obj);
if (item == null)
{
return;
}
item.UpdateIndent();
}
private void SetParent(TreeViewItemContainerData parent, TreeViewItemContainerData child)
{
VirtualizingTreeViewItem tvDragItem = (VirtualizingTreeViewItem)GetItemContainer(child.Item);
if (tvDragItem != null)
{
tvDragItem.Parent = parent;
}
else
{
child.Parent = parent;
}
}
public void Collapse(object item)
{
VirtualizingTreeViewItem treeViewItem = this.GetTreeViewItem(item);
if (Object.op_Inequality((Object)treeViewItem, (Object)null))
{
treeViewItem.IsExpanded = false;
}
else
{
this.Internal_Collapse(item);
}
}
private void SetParent(TreeViewItemContainerData parent, TreeViewItemContainerData child)
{
VirtualizingTreeViewItem itemContainer = (VirtualizingTreeViewItem)this.GetItemContainer(child.Item);
if (Object.op_Inequality((Object)itemContainer, (Object)null))
{
itemContainer.Parent = parent;
}
else
{
child.Parent = parent;
}
}
public void Collapse(object item)
{
VirtualizingTreeViewItem tvi = GetTreeViewItem(item);
if (tvi != null)
{
tvi.IsExpanded = false;
}
else
{
Internal_Collapse(item);
}
}
public void Collapse(object item)
{
VirtualizingTreeViewItem tvi = GetTreeViewItem(item);
if (tvi != null)
{
tvi.IsExpanded = false;
}
else
{
TreeViewItemContainerData containerData = (TreeViewItemContainerData)GetItemContainerData(item);
containerData.IsExpanded = false;
}
}
protected override void DestroyItems(object[] items, bool unselect)
{
TreeViewItemContainerData[] array = ((IEnumerable <TreeViewItemContainerData>)((IEnumerable <object>)items).Select <object, ItemContainerData>((Func <object, ItemContainerData>)(item => this.GetItemContainerData(item))).OfType <TreeViewItemContainerData>().ToArray <TreeViewItemContainerData>()).Where <TreeViewItemContainerData>((Func <TreeViewItemContainerData, bool>)(container => container.Parent != null)).Select <TreeViewItemContainerData, TreeViewItemContainerData>((Func <TreeViewItemContainerData, TreeViewItemContainerData>)(container => container.Parent)).ToArray <TreeViewItemContainerData>();
this.Collapse(items);
base.DestroyItems(items, unselect);
foreach (TreeViewItemContainerData itemContainerData in array)
{
if (!itemContainerData.HasChildren(this))
{
VirtualizingTreeViewItem itemContainer = (VirtualizingTreeViewItem)this.GetItemContainer(itemContainerData.Item);
if (Object.op_Inequality((Object)itemContainer, (Object)null))
{
itemContainer.CanExpand = false;
}
}
}
}
void IEndDragHandler.OnEndDrag(PointerEventData eventData)
{
if (TreeView.DropTarget != null)
{
GameObject dropTarget = (GameObject)TreeView.DropTarget;
GameObject newDataItem = new GameObject();
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)TreeView.GetItemContainer(TreeView.DropTarget);
if (TreeView.DropAction == ItemDropAction.SetLastChild)
{
newDataItem.transform.SetParent(dropTarget.transform);
TreeView.AddChild(TreeView.DropTarget, newDataItem);
treeViewItem.CanExpand = true;
treeViewItem.IsExpanded = true;
}
else if (TreeView.DropAction != ItemDropAction.None)
{
int index;
if (TreeView.DropAction == ItemDropAction.SetNextSibling)
{
index = TreeView.IndexOf(dropTarget) + 1;
}
else
{
index = TreeView.IndexOf(dropTarget);
}
newDataItem.transform.SetParent(dropTarget.transform.parent);
newDataItem.transform.SetSiblingIndex(index);
TreeViewItemContainerData newTreeViewItemData = (TreeViewItemContainerData)TreeView.Insert(index, newDataItem);
VirtualizingTreeViewItem newTreeViewItem = (VirtualizingTreeViewItem)TreeView.GetItemContainer(newDataItem);
if (newTreeViewItem != null)
{
newTreeViewItem.Parent = treeViewItem.Parent;
}
else
{
newTreeViewItemData.Parent = treeViewItem.Parent;
}
}
}
TreeView.ExternalItemDrop();
}
private void SetIndent(VirtualizingTreeViewItem parent, ref int itemIndex)
{
while (true)
{
VirtualizingTreeViewItem itemContainer = (VirtualizingTreeViewItem)this.TreeView.GetItemContainer(this.TreeView.GetItemAt(itemIndex + 1));
if (!Object.op_Equality((Object)itemContainer, (Object)null) && itemContainer.Item != null && itemContainer.Parent == parent.m_treeViewItemData)
{
itemContainer.m_treeViewItemData.Indent = parent.m_treeViewItemData.Indent + this.TreeView.Indent;
((LayoutGroup)itemContainer.m_itemLayout).get_padding().set_left(itemContainer.m_treeViewItemData.Indent);
++itemIndex;
this.SetIndent(itemContainer, ref itemIndex);
}
else
{
break;
}
}
}
public override void SetTarget(VirtualizingItemContainer item)
{
base.SetTarget(item);
if (Object.op_Equality((Object)item, (Object)null))
{
return;
}
VirtualizingTreeViewItem virtualizingTreeViewItem = (VirtualizingTreeViewItem)item;
if (Object.op_Inequality((Object)virtualizingTreeViewItem, (Object)null))
{
this.m_siblingGraphicsRectTransform.set_offsetMin(new Vector2(virtualizingTreeViewItem.Indent, (float)this.m_siblingGraphicsRectTransform.get_offsetMin().y));
}
else
{
this.m_siblingGraphicsRectTransform.set_offsetMin(new Vector2(0.0f, (float)this.m_siblingGraphicsRectTransform.get_offsetMin().y));
}
}
public bool Expand(object item)
{
VirtualizingTreeViewItem treeViewItem = this.GetTreeViewItem(item);
if (Object.op_Inequality((Object)treeViewItem, (Object)null))
{
treeViewItem.IsExpanded = true;
}
else
{
if ((TreeViewItemContainerData)this.GetItemContainerData(item) == null)
{
Debug.LogWarning((object)("Unable find container data for item " + item));
return(false);
}
this.Internal_Expand(item);
}
return(true);
}
public override void SetTarget(VirtualizingItemContainer item)
{
base.SetTarget(item);
if (item == null)
{
return;
}
VirtualizingTreeViewItem tvItem = (VirtualizingTreeViewItem)item;
if (tvItem != null)
{
m_siblingGraphicsRectTransform.offsetMin = new Vector2(tvItem.Indent, m_siblingGraphicsRectTransform.offsetMin.y);
}
else
{
m_siblingGraphicsRectTransform.offsetMin = new Vector2(0, m_siblingGraphicsRectTransform.offsetMin.y);
}
}
public override void DataBindItem(object item, ItemContainerData containerData, VirtualizingItemContainer itemContainer)
{
itemContainer.Clear();
VirtualizingTreeViewItemDataBindingArgs args = new VirtualizingTreeViewItemDataBindingArgs();
args.Item = item;
args.ItemPresenter = itemContainer.ItemPresenter == null ? gameObject : itemContainer.ItemPresenter;
args.EditorPresenter = itemContainer.EditorPresenter == null ? gameObject : itemContainer.EditorPresenter;
RaiseItemDataBinding(args);
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)itemContainer;
treeViewItem.CanExpand = args.HasChildren;
treeViewItem.CanEdit = args.CanEdit;
treeViewItem.CanDrag = args.CanDrag;
treeViewItem.UpdateIndent();
}
public void Expand(object item)
{
VirtualizingTreeViewItem tvi = GetTreeViewItem(item);
if (tvi != null)
{
tvi.IsExpanded = true;
}
else
{
TreeViewItemContainerData containerData = (TreeViewItemContainerData)GetItemContainerData(item);
if (containerData == null)
{
Debug.LogWarning("Unable find container data for item " + item);
}
else
{
Internal_Expand(item);
}
}
}
protected override void DestroyItems(object[] items, bool unselect)
{
TreeViewItemContainerData[] itemContainers = items.Select(item => GetItemContainerData(item)).OfType <TreeViewItemContainerData>().ToArray();
TreeViewItemContainerData[] parents = itemContainers.Where(container => container.Parent != null).Select(container => container.Parent).ToArray();
Collapse(items);
base.DestroyItems(items, unselect);
foreach (TreeViewItemContainerData parent in parents)
{
if (!parent.HasChildren(this))
{
VirtualizingTreeViewItem treeViewItem = (VirtualizingTreeViewItem)GetItemContainer(parent.Item);
if (treeViewItem != null)
{
treeViewItem.CanExpand = false;
}
}
}
}
private void MoveSubtree(TreeViewItemContainerData parent, TreeViewItemContainerData child)
{
int parentSiblingIndex = IndexOf(parent.Item);
int siblingIndex = IndexOf(child.Item);
bool incrementSiblingIndex = false;
if (parentSiblingIndex < siblingIndex)
{
incrementSiblingIndex = true;
}
TreeViewItemContainerData prev = parent;
VirtualizingTreeViewItem tvItem = (VirtualizingTreeViewItem)GetItemContainer(prev.Item);
if (tvItem != null)
{
tvItem.UpdateIndent();
}
while (child != null && child.IsDescendantOf(parent))
{
if (prev == child)
{
break;
}
base.SetNextSiblingInternal(prev, child);
tvItem = (VirtualizingTreeViewItem)GetItemContainer(child.Item);
if (tvItem != null)
{
tvItem.UpdateIndent();
}
prev = child;
if (incrementSiblingIndex)
{
siblingIndex++;
}
child = (TreeViewItemContainerData)GetItemContainerData(siblingIndex);
}
}
protected override void SetPrevSiblingInternal(
ItemContainerData sibling,
ItemContainerData prevSibling)
{
TreeViewItemContainerData itemContainerData1 = (TreeViewItemContainerData)sibling;
TreeViewItemContainerData itemContainerData2 = (TreeViewItemContainerData)prevSibling;
TreeViewItemContainerData child = itemContainerData2.FirstChild(this);
base.SetPrevSiblingInternal(sibling, prevSibling);
if (child != null)
{
this.MoveSubtree(itemContainerData2, child);
}
this.SetParent(itemContainerData1.Parent, itemContainerData2);
VirtualizingTreeViewItem itemContainer = (VirtualizingTreeViewItem)this.GetItemContainer(itemContainerData2.Item);
if (!Object.op_Inequality((Object)itemContainer, (Object)null))
{
return;
}
itemContainer.UpdateIndent();
}
protected override void SetPrevSiblingInternal(ItemContainerData sibling, ItemContainerData prevSibling)
{
TreeViewItemContainerData tvSiblingData = (TreeViewItemContainerData)sibling;
TreeViewItemContainerData tvItemData = (TreeViewItemContainerData)prevSibling;
TreeViewItemContainerData tvDragItemChild = tvItemData.FirstChild(this);
base.SetPrevSiblingInternal(sibling, prevSibling);
if (tvDragItemChild != null)
{
MoveSubtree(tvItemData, tvDragItemChild);
}
SetParent(tvSiblingData.Parent, tvItemData);
VirtualizingTreeViewItem tvItem = (VirtualizingTreeViewItem)GetItemContainer(tvItemData.Item);
if (tvItem != null)
{
tvItem.UpdateIndent();
}
}