/// <summary>
 /// Create simple square point on chart with specified color and text near it
 /// </summary>
 /// <param name="chart">Chart for point</param>
 /// <param name="text">Text near the point</param>
 /// <param name="center">The center position of this point, in real coordinates</param>
 /// <param name="place_type">Text placement type of text near the point</param>
 public ChartTextPoint(Chart chart, string text, DPoint center, TextPlaceType place_type)
     : base(chart, center)
 {
     Flags     = 0;
     Text      = text;
     Color     = Color.Black;
     TextPlace = place_type;
 }
 /// <summary>
 /// Create simple square point on chart with specified color and text near it 
 /// </summary>
 /// <param name="chart">Chart for point</param>
 /// <param name="text">Text near the point</param>
 /// <param name="center">The center position of this point, in real coordinates</param>
 /// <param name="place_type">Text placement type of text near the point</param>
 public ChartTextPoint(Chart chart, string text, DPoint center, TextPlaceType place_type)
     : base(chart, center)
 {
     Flags = 0;
     Text = text;
     Color = Color.Black;
     TextPlace = place_type;
 }