private bool MoveSelectedItems(SelectedListItemSet selectedItemSet, NodeTarget target)
{
if (target == null)
{
return(false);
}
ITreeFolder[] selectedFolders = selectedItemSet
.Where(item => item is ITreeFolder)
.Select(item => item as ITreeFolder).ToArray();
//자신 내부에 이동시도시 Reject
foreach (ITreeFolder folder in selectedFolders)
{
if (folder == target.node)
{
return(false);
}
if (IsContainsChildRecursive(folder, target.node))
{
MessageOccured?.Invoke("자신의 하위 폴더로 이동할 수 없습니다.");
return(false);
}
}
//정렬
ITreeItem[] sortedSelectedItems = CollectSelectedItems();
//이동
if (target.node is ITreeFolder && target.direction == NodeDirection.Bottom && ((ITreeFolder)target.node).ChildItemCollection.Count > 0)
{
target.direction = NodeDirection.InnerTop;
}
if (target.direction == NodeDirection.Bottom || target.direction == NodeDirection.InnerTop)
{
sortedSelectedItems = sortedSelectedItems.Reverse().ToArray();
}
foreach (ITreeItem item in sortedSelectedItems)
{
ITreeFolder oldParent = item.ParentItem;
ITreeFolder newParent = null;
int index = -1;
FrameworkElement uiItem = (FrameworkElement)item;
if (oldParent != null)
{
oldParent.ChildItemCollection.Remove(item as UIElement);
}
else if (uiItem.Parent != null)
{
((Panel)uiItem.Parent).Children.Remove(uiItem);
}
if (target.direction == NodeDirection.InnerTop)
{
//폴더 내부로
newParent = target.node as ITreeFolder;
index = 0;
}
else if (target.direction == NodeDirection.InnerBottom)
{
//폴더 내부로
newParent = target.node as ITreeFolder;
index = newParent.ChildItemCollection.Count;
}
else
{
//아이템 위아래로
newParent = target.node.ParentItem;
index = newParent.ChildItemCollection.IndexOf(target.node as UIElement) +
(target.direction == NodeDirection.Bottom ? 1 : 0);
}
if (AutoApplyItemMove)
{
newParent.ChildItemCollection.Insert(index, item as UIElement);
}
item.ParentItem = newParent;
ItemMoved?.Invoke(item, oldParent, newParent, index);
}
return(true);
}
public void OnMessageOccured(MessageArgs m)
{
MessageOccured?.Invoke(this, m);
}
