/// <summary>
/// Inserts an item at the specified index
/// </summary>
///
/// <param name="index">
/// Zero-based index of the position to insert the item
/// </param>
/// <param name="item">
/// The item to insert.
/// </param>
public void Insert(int index, T item)
{
if (MutableList.Add(item))
{
MutableListOrdered.Insert(index, item);
Touch();
}
}
/// <summary>
/// Removes the item at the specified index.
/// </summary>
///
/// <exception cref="IndexOutOfRangeException">
/// Thrown when the index is outside the bound of the current set.
/// </exception>
///
/// <param name="index">
/// Zero-based index of the item to remove.
/// </param>
public void RemoveAt(int index)
{
if (index >= Count || Count == 0)
{
throw new IndexOutOfRangeException("Index out of range");
}
T item = OrderedList.ElementAt(index);
MutableList.Remove(item);
MutableListOrdered.Remove(item);
Touch();
}
/// <summary>
/// Removes the given item from the SelectionSet
/// </summary>
///
/// <param name="item">
/// The item to remove.
/// </param>
///
/// <returns>
/// true if it succeeds, false if it fails.
/// </returns>
public bool Remove(T item)
{
if (MutableList.Remove(item))
{
MutableListOrdered.Remove(item);
Touch();
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Adds a new item to the SelectionSet
/// </summary>
///
/// <param name="item">
/// The item to add.
/// </param>
///
/// <returns>
/// true if it succeeds, false if it fails.
/// </returns>
public bool Add(T item)
{
if (MutableList.Add(item))
{
MutableListOrdered.Add(item);
Touch();
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Use after set operations that alter the list
/// </summary>
private void SynchronizeOrderedList()
{
int index = 0;
while (index < MutableListOrdered.Count)
{
if (!MutableList.Contains(MutableListOrdered[index]))
{
MutableListOrdered.RemoveAt(index);
}
else
{
index++;
}
}
}
/// <summary>
/// Indexer to get or set items within this collection using array index syntax.
/// </summary>
///
/// <param name="index">
/// Zero-based index of the entry to access.
/// </param>
///
/// <returns>
/// The indexed item.
/// </returns>
public T this[int index]
{
get
{
return(OrderedList.ElementAt(index));
}
set
{
T item = OrderedList.ElementAt(index);
MutableList.Remove(item);
MutableList.Add(value);
int i = MutableListOrdered.IndexOf(item);
MutableListOrdered[i] = value;
Touch();
}
}
