/// <summary>
/// Sets the state of DraftCanvas state as add primitive.
/// </summary>
/// <param name="primitiveName">Primitive's name.</param>
public void AddPrimitive(string primitiveName)
{
if (_primitiveCreator != null)
{
_primitiveCreator.CancelCreation(this);
_primitiveCreator = null;
}
_primitiveCreator = new DcLineSegmentCreator();
}
