public override void SerializeAttributes( PersistanceWriter op )
{
base.SerializeAttributes( op );
op.SetInt32( "t", m_Ticks );
op.SetInt32( "r", (int) m_RenderMode );
op.SetString( "x", m_xTitle );
op.SetString( "y", m_yTitle );
op.SetInt32( "s", m_FontSize );
op.SetInt32( "i", m_Interval );
}