Trouble displaying an Image being drawn with the Drawing API

[garymooney]

Hi,

I'm very new to Xwt and am trying to procedurally generate and draw an image on a Gtk Window.

My code is as follows

Application.Initialize(ToolkitType.Gtk);
var mainWindow = new Window();
mainWindow.Title = "Xwt Demo Application";
mainWindow.Width = 500;
mainWindow.Height = 400;

Table vbox = new Table();
vbox.Add(new ImageView(new CustomImage()), 0, 0);
            
mainWindow.Content = vbox;
mainWindow.Show();
Application.Run();

mainWindow.Dispose();
Application.Dispose();

The CustomImage class overrides the OnDraw(Context, Rectangle) method with

ctx.Rectangle(new Rectangle(0, 0, 50, 50));
ctx.Arc(25, 25, 25, 0, 360);
ctx.SetColor(Colors.Black);
ctx.Stroke();

I see the window but no image inside. Using the Wpf toolkit type displays the image fine.

I'm finding Xwt to be quite hard to learn due to their being no tutorials or API documentation (at least from my search). Are there any recommendations of reference material you might have?

Thanks for any help,

Gary