Nested Scroll Areas

Question

I creating a control for WPF, and I have a question for you WPF gurus out there.

I want my control to be able to expand to fit a resizable window.

In my con

Answer 1

I've created a class to work around this problem:

public class RestrictDesiredSize : Decorator
{
    Size lastArrangeSize = new Size(double.PositiveInfinity, double.PositiveInfinity);

    protected override Size MeasureOverride(Size constraint)
    {
        Debug.WriteLine("Measure: " + constraint);
        base.MeasureOverride(new Size(Math.Min(lastArrangeSize.Width, constraint.Width),
                                      Math.Min(lastArrangeSize.Height, constraint.Height)));
        return new Size(0, 0);
    }

    protected override Size ArrangeOverride(Size arrangeSize)
    {
        Debug.WriteLine("Arrange: " + arrangeSize);
        if (lastArrangeSize != arrangeSize) {
            lastArrangeSize = arrangeSize;
            base.MeasureOverride(arrangeSize);
        }
        return base.ArrangeOverride(arrangeSize);
    }
}

It will always return a desired size of (0,0), even if the containing element wants to be bigger. Usage: