public void AddElements(IList <T> elements, TreeElement parent, int insertPosition)
{
if (elements == null)
{
throw new ArgumentNullException("elements", "elements is null");
}
if (elements.Count == 0)
{
throw new ArgumentNullException("elements", "elements Count is 0: nothing to add");
}
if (parent == null)
{
throw new ArgumentNullException("parent", "parent is null");
}
if (parent.children == null)
{
parent.children = new List <TreeElement>();
}
parent.children.InsertRange(insertPosition, elements.Cast <TreeElement> ());
foreach (var element in elements)
{
element.parent = parent;
element.depth = parent.depth + 1;
TreeElementUtility.UpdateDepthValues(element);
}
TreeElementUtility.TreeToList(m_Root, m_Data);
Changed();
}
public void MoveElements(TreeElement parentElement, int insertionIndex, List <TreeElement> elements)
{
if (insertionIndex < 0)
{
throw new ArgumentException(
"Invalid input: insertionIndex is -1, client needs to decide what index elements should be reparented at");
}
// Invalid reparenting input
if (parentElement == null)
{
return;
}
// We are moving items so we adjust the insertion index to accomodate that any items above the insertion index is removed before inserting
if (insertionIndex > 0)
{
insertionIndex -= parentElement.children.GetRange(0, insertionIndex).Count(elements.Contains);
}
// Remove draggedItems from their parents
foreach (var draggedItem in elements)
{
draggedItem.parent.children.Remove(draggedItem); // remove from old parent
draggedItem.parent = parentElement; // set new parent
}
if (parentElement.children == null)
{
parentElement.children = new List <TreeElement>();
}
// Insert dragged items under new parent
parentElement.children.InsertRange(insertionIndex, elements);
TreeElementUtility.UpdateDepthValues(root);
TreeElementUtility.TreeToList(m_Root, m_Data);
Changed();
}
public void AddElement(T element, TreeElement parent, int insertPosition)
{
if (element == null)
{
throw new ArgumentNullException("element", "element is null");
}
if (parent == null)
{
throw new ArgumentNullException("parent", "parent is null");
}
if (parent.children == null)
{
parent.children = new List <TreeElement> ();
}
parent.children.Insert(insertPosition, element);
element.parent = parent;
TreeElementUtility.UpdateDepthValues(parent);
TreeElementUtility.TreeToList(m_Root, m_Data);
Changed();
}