/// <summary>
/// Transforms point from data coordinates to screen.
/// </summary>
/// <param name="dataPoint">The point in data coordinates.</param>
/// <returns></returns>
public Point DataToScreen(Point dataPoint)
{
Point viewportPoint = dataTransform.DataToViewport(dataPoint);
Point screenPoint = new Point(viewportPoint.X * rxToScreen - cxToScreen, cyToScreen - viewportPoint.Y * ryToScreen);
return(screenPoint);
}