/// <summary>
/// Adds a shape to the display list.
/// </summary>
/// <param name="shape">Shape object to add.</param>
/// <returns>The shape object added.</returns>
public Shape AddShape( Shape shape )
{
Shapes.Add( shape );
return shape;
}
/// <summary>
/// Removes a shape from the display list.
/// </summary>
/// <param name="shape">Shape object to remove.</param>
/// <returns>The shape object removed.</returns>
public Shape RemoveShape( Shape shape )
{
Shapes.Remove( shape );
return shape;
}
private static int SortZIndex( Shape a, Shape b )
{
return a.ZIndex.CompareTo( b.ZIndex );
}