The Magic of Pen

    In my last blog entry, I talked about the Avalon brushes and RadialGradientBrush in particular. In this episode, I am gonna talk about pen in Avalon, pen as its name indicates can be used to paint the outline of a specified UIElement or ContentElement, in the following code, I just instantiate a simple Ellipse shape and set its stroke with some tailor-made properties:

using System;
using System.Windows;
using System.Windows.Shapes;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace PenDemo
{
    public class PenDemoWindow : Window
    {
        [STAThread]
        public static void Main()
        {
            Application app = new Application();
            app.Run(new PenDemoWindow());
        }
        public PenDemoWindow()
        {
            // Set the transparent image as the window background, workaround for the black window problem.
            BitmapImage bitmap = new BitmapImage(new Uri("pack://application:,,/workaround_image.jpg"));
            ImageBrush workaroundImage = new ImageBrush(bitmap);
            this.Background = workaroundImage;

            this.Title = "The Magic of Pen";

            Ellipse ellipse = new Ellipse();
            ellipse.Margin = new Thickness(20d);
            ellipse.Width = 400d;
            ellipse.Height = 400d;
            ellipse.Fill = Brushes.Green;
            ellipse.Stroke = Brushes.Red;
            ellipse.StrokeThickness = 80d;
            ellipse.StrokeDashCap = PenLineCap.Round;

            DoubleCollection dc = new DoubleCollection();
            dc.Add(0d);
            dc.Add(2d);
            ellipse.StrokeDashArray = dc;

            this.Content = ellipse;
            this.SizeToContent = SizeToContent.WidthAndHeight;
        }
    }
}

    Here is the screenshot of this fancy application: