/// <summary>
/// Draw the shaded region as an approximated polygon and return the polygon
/// The Zindex, Top, and Left attributes will also be set and the shading will be added to the drawing.
/// </summary>
/// <param name="drawing">The current drawing</param>
/// <param name="shadingBrush">The brush to shade the region with</param>
/// <returns>The graphical representation of the region.</returns>
public UIElement Draw(Drawing drawing, Brush shadingBrush)
{
//Create the polygon with the correct physical points
Shading = new System.Windows.Shapes.Polygon();
SetPolygonPoints(Shading, drawing.CoordinateSystem);
//Color the polygon
Shading.Fill = shadingBrush;
Shading.Stroke = new SolidColorBrush(Colors.DarkGray);
Shading.StrokeThickness = 1;
//Orient the polygon
Canvas.SetTop(Shading, 0);
Canvas.SetLeft(Shading, 0);
Canvas.SetZIndex(Shading, (int)ZOrder.Shading);
//Add to the drawing
drawing.AddRegionShading(this);
return(Shading);
}
