Scale items with ViewBox within an ItemsControl

[Kenneth Haugland]

So I have some FrameworkElements that I want to scale with a ViewBox. This works fine with normal XAML code:

But as soon as I want to join them together and scale them appropriately to the available size I have a problem:

The ViewBox simply refuses to scale them according to the set size of the ViewBox. Any ideas on how to fix this?

[Kenneth Haugland]

Still havent found out what was wrong with this, but here is one of the FrameworkElements Im trying to bind the ItemsControl to

public class SourceDiagramBase : FrameworkElement, INotifyPropertyChanged
{
    private VisualCollection \_children;

    public SourceDiagramBase()
    {
        \_children = new VisualCollection(this);
        \_children.Add(CreateDrawingVisual());
    }

    protected override int VisualChildrenCount { get { return \_children.Count; } }


    protected override Visual GetVisualChild(int index)
    {
        return \_children\[index\];
    }



    public double Scale
    {
        get { return (double)GetValue(ScaleProperty); }
        set { SetValue(ScaleProperty, value); }
    }

    // Using a DependencyProperty as the backing store for Scale.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ScaleProperty =
        DependencyProperty.Register("Scale", typeof(double), typeof(SourceDiagramBase), new PropertyMetadata(20d));

    protected override Size MeasureOverride(Size availableSize)
    {
        return new Size(this.Scale \* 12d, this.Scale \* 12d);
    }


    private DrawingVisual CreateDrawingVisual()
    {
        DrawingVisual drawingVisual = new DrawingVisual();
        DrawingContext drawingContext = drawingVisual.RenderOpen();

        drawingContext.PushTransform(new ScaleTransform(this.Scale, this.Scale));

        double thick = 0.04;
        drawingContext.DrawEllipse(Brushes.Transparent, new Pen(Brushes.Black, thick), new Point(6, 6), 3,3);

        drawingContext.DrawLine(new Pen(Brushes.Black, thick), new Point(6, 3), new Point(6, 2));
        drawingContext.DrawLine(new Pen(Brushes.Black, thick), new Point(6, 9), new Point(6, 10));

        drawingContext.DrawLine(new Pen(Brushes.Black, thick), new Point(6, 2), new Point(12, 2));
        drawingContext.DrawLine(new Pen(Brushes.Black, thick), new Point(6, 10), new Point(12, 10));

        drawingContext.Close();
        return drawingVisual;
    }

    public event PropertyChangedEventHandler PropertyChanged;

    // This method is called by the Set accessor of each property.
    // The CallerMemberName attribute that is applied to the optional propertyName
    // parameter causes the property name of the caller to be substituted as