/// <summary>
/// Inserts an item into the collection at the specified index.
/// </summary>
/// <param name="index">The index at which to insert the item.</param>
/// <param name="item">The item to insert into the collection.</param>
public override void Insert(int index, RecursiveCollection <T> item)
{
//Note: No error handling necessary.
// If the index is out of bounds, then let the list's insert method throw an exception.
base.Insert(index, item);
item.Parent = this;
}
/// <summary>
/// Removes the first occurrence of a specific item from the collection.
/// </summary>
/// <param name="item">The item to remove from the collection.</param>
/// <returns>
/// Returns true if the item was successfully removed from the collection, otherwise false.
/// This method also returns false if item was not found in the collection.
/// </returns>
public override bool Remove(RecursiveCollection <T> item)
{
bool removed = base.Remove(item);
if (removed)
{
if (item.Parent == this && !Contains(item))
{
item.Parent = null;
}
}
return(removed);
}
/// <summary>
/// Removes all items from the collection.
/// </summary>
public override void Clear()
{
var oldItems = new RecursiveCollection <T> [Count];
ListItems.CopyTo(oldItems, 0);
base.Clear();
foreach (var item in oldItems)
{
if (item.Parent == this)
{
item.Parent = null;
}
}
}
/// <summary>
/// Creates a new instance of <see cref="RecursiveCollection{T}"/>.
/// </summary>
/// <param name="value">
/// The value at this node of the <see cref="RecursiveCollection{T}"/>.
/// </param>
/// <param name="parent">
/// The collection of items that is the hierarchical parent of this collection.
/// </param>
/// <param name="childItems">
/// A collection of value to initialize this collection with, as
/// the hierarchical children of this node.
/// </param>
public RecursiveCollection(T value, RecursiveCollection <T> parent, params T[] childItems)
{
Value = value;
Parent = parent;
Children = new List <RecursiveCollection <T> >(childItems.Select(childItem => new RecursiveCollection <T>(childItem, this)));
}
/// <summary>
/// Creates a new instance of <see cref="RecursiveCollection{T}"/>.
/// </summary>
/// <param name="value">
/// The value at this node of the <see cref="RecursiveCollection{T}"/>.
/// </param>
/// <param name="parent">
/// The collection of items that is the hierarchical parent of this collection.
/// </param>
public RecursiveCollection(T value, RecursiveCollection <T> parent)
{
Value = value;
Parent = parent;
Children = new List <RecursiveCollection <T> >();
}
/// <summary>
/// Adds an item to the collection.
/// </summary>
/// <param name="item">The item to add.</param>
public override void Add(RecursiveCollection <T> item)
{
base.Add(item);
item.Parent = this;
}