/// <summary>
/// Adds to boundary.
/// </summary>
/// <param name="item">The item.</param>
private void addToBoundary(CompositeShape <T, TBoundary, TExtents> item)
{
if (IsBaseShape())
{
_boundary.Reset(item.Boundary);
}
else
{
_boundary.Add(item.Boundary);
}
}
/// <summary>
/// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.Generic.List`1" />.
/// </summary>
/// <param name="item">The object to remove from the <see cref="T:System.Collections.Generic.List`1" />. The value can be null for reference types.</param>
/// <returns>true if <paramref name="item" /> is successfully removed; otherwise, false. This method also returns false if <paramref name="item" /> was not found in the <see cref="T:System.Collections.Generic.List`1" />.</returns>
public new bool Remove(CompositeShape <T, TBoundary, TExtents> item)
{
if (!base.Remove(item))
{
return(false);
}
removeFromBoundary(item);
updateExtents();
return(true);
}
/// <summary>
/// Removes from boundary.
/// </summary>
/// <param name="item">The item.</param>
private void removeFromBoundary(CompositeShape <T, TBoundary, TExtents> item)
{
// Simple removal if last shape
if (Count == 1 &&
Contains(item))
{
_boundary.Clear();
}
else
{
_boundary.Remove(item.Boundary);
}
}
/// <summary>
/// Inserts an element into the <see cref="T:System.Collections.Generic.List`1" /> at the specified index.
/// </summary>
/// <param name="index">The zero-based index at which <paramref name="item" /> should be inserted.</param>
/// <param name="item">The object to insert. The value can be null for reference types.</param>
public new void Insert(int index, CompositeShape <T, TBoundary, TExtents> item)
{
addToBoundary(item);
base.Insert(index, item);
_extents.Add(item.Extents);
}
/// <summary>
/// Adds an object to the end of the <see cref="T:System.Collections.Generic.List`1" />.
/// </summary>
/// <param name="item">The object to be added to the end of the <see cref="T:System.Collections.Generic.List`1" />. The value can be null for reference types.</param>
public new void Add(CompositeShape <T, TBoundary, TExtents> item)
{
addToBoundary(item);
base.Add(item);
_extents.Add(item.Extents);
}