public void MoveElements(TreeItem parentItem, int insertionIndex, List <TreeItem> elements)
{
if (insertionIndex < 0)
{
throw new ArgumentException(Maintainer.ConstructError("Invalid input: insertionIndex is -1, client needs to decide what index elements should be reparented at!"));
}
if (parentItem == null)
{
return;
}
if (insertionIndex > 0)
{
insertionIndex -= parentItem.Children.GetRange(0, insertionIndex).Count(elements.Contains);
}
foreach (var draggedItem in elements)
{
draggedItem.Parent.Children.Remove(draggedItem);
draggedItem.Parent = parentItem;
}
if (parentItem.Children == null)
{
parentItem.Children = new List <TreeItem>();
}
parentItem.Children.InsertRange(insertionIndex, elements);
TreeItemUtility.UpdateDepthValues(root);
TreeItemUtility.TreeToList(root, data);
Changed();
}
public void AddElements(IList <T> elements, TreeItem parent, int insertPosition)
{
if (elements == null)
{
throw new ArgumentNullException("elements", Maintainer.ConstructError("elements is null!"));
}
if (elements.Count == 0)
{
throw new ArgumentNullException("elements", Maintainer.ConstructError("elements Count is 0: nothing to add!"));
}
if (parent == null)
{
throw new ArgumentNullException("parent", Maintainer.ConstructError("parent is null!"));
}
if (parent.Children == null)
{
parent.Children = new List <TreeItem>();
}
parent.Children.InsertRange(insertPosition, elements.Cast <TreeItem> ());
foreach (var element in elements)
{
element.Parent = parent;
element.depth = parent.depth + 1;
TreeItemUtility.UpdateDepthValues(element);
}
TreeItemUtility.TreeToList(root, data);
Changed();
}
public void AddElement(T element, TreeItem parent, int insertPosition)
{
if (element == null)
{
throw new ArgumentNullException("element", Maintainer.ConstructError("element is null!"));
}
if (parent == null)
{
throw new ArgumentNullException("parent", Maintainer.ConstructError("parent is null!"));
}
if (parent.Children == null)
{
parent.Children = new List <TreeItem> ();
}
parent.Children.Insert(insertPosition, element);
element.Parent = parent;
TreeItemUtility.UpdateDepthValues(parent);
TreeItemUtility.TreeToList(root, data);
Changed();
}
