static void Main(string[] args)
{
var circle = new Circle(4);
var rectangle = new Rectangle(1, 3);
var triangle = new Triangle(new Point(2, 2), new Point(4, 4), new Point(4, 2));
var rectangleClient = new RectangleClient(rectangle);
var circleClient = new CircleClient(circle);
var triangleClient = new TriangleClient(triangle);
var perimeterVisitor = new PerimeterVisitor();
var areaVisitor = new GetAreaVisitor();
var drawVisitor = new DrawVisitor();
var visitors = new IVisitor[] { perimeterVisitor, areaVisitor, drawVisitor };
foreach (var visitor in visitors)
{
visitor.Visit(circleClient);
visitor.Visit(rectangleClient);
visitor.Visit(triangleClient);
}
Console.WriteLine("Perimeters");
Console.WriteLine(rectangleClient.Perimeter);
Console.WriteLine(circleClient.Perimeter);
Console.WriteLine(triangleClient.Perimeter);
Console.WriteLine();
Console.WriteLine("Areas");
Console.WriteLine(rectangleClient.Area);
Console.WriteLine(circleClient.Area);
Console.WriteLine(triangleClient.Area);
}
public void Visit(CircleClient client)
{
var length = 2 * client.Figure.Radius;
var picture = new Bitmap(length, length);
using (var graphics = Graphics.FromImage(picture))
{
graphics.DrawEllipse(Pens.Blue, client.Figure.Radius, client.Figure.Radius,
client.Figure.Radius * 2, client.Figure.Radius * 2);
}
client.Picture = picture;
}
public void Visit(CircleClient client)
{
client.Area = Math.PI * Math.Pow(client.Figure.Radius, 2);
}
public void Visit(CircleClient client)
{
client.Perimeter = Math.PI * 2 * client.Figure.Radius;
}