|
public static IsChildListForACollapsedParent ( IList |
||
| childList | IList |
|
| return | bool | |
private static void SetChildren(TreeViewItem item, List <TreeViewItem> newChildList)
{
if (!LazyTreeViewDataSource.IsChildListForACollapsedParent(item.children) || newChildList != null)
{
item.children = newChildList;
}
}
internal static HashSet <int> GetParentsBelowItem(TreeViewItem fromItem)
{
if (fromItem == null)
{
throw new ArgumentNullException("fromItem");
}
Stack <TreeViewItem> stack = new Stack <TreeViewItem>();
stack.Push(fromItem);
HashSet <int> hashSet = new HashSet <int>();
while (stack.Count > 0)
{
TreeViewItem treeViewItem = stack.Pop();
if (treeViewItem.hasChildren)
{
hashSet.Add(treeViewItem.id);
if (LazyTreeViewDataSource.IsChildListForACollapsedParent(treeViewItem.children))
{
throw new InvalidOperationException("Invalid tree for finding descendants: Ensure a complete tree when using this utillity method.");
}
foreach (TreeViewItem current in treeViewItem.children)
{
stack.Push(current);
}
}
}
return(hashSet);
}
// Assumes full tree
internal static void GetParentsBelowItem(TreeViewItem fromItem, HashSet <int> parentsBelow)
{
if (fromItem == null)
{
throw new ArgumentNullException("fromItem");
}
Stack <TreeViewItem> stack = new Stack <TreeViewItem>();
stack.Push(fromItem);
while (stack.Count > 0)
{
TreeViewItem current = stack.Pop();
if (current.hasChildren)
{
parentsBelow.Add(current.id);
if (LazyTreeViewDataSource.IsChildListForACollapsedParent(current.children))
{
throw new InvalidOperationException("Invalid tree for finding descendants: Ensure a complete tree when using this utillity method.");
}
foreach (var foo in current.children)
{
stack.Push(foo);
}
}
}
}
static void SetChildren(TreeViewItem item, List <TreeViewItem> newChildList)
{
// Do not touch children if we have a LazyParent and did not find any children == keep lazy children
if (LazyTreeViewDataSource.IsChildListForACollapsedParent(item.children) && newChildList == null)
{
return;
}
item.children = newChildList;
}
protected static bool IsChildListForACollapsedParent(IList <TreeViewItem> childList)
{
return(LazyTreeViewDataSource.IsChildListForACollapsedParent(childList));
}
