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 used Daniels solution. That works great. Thank you.

Then I added two boolean dependency properties to the decorator class: KeepWidth and KeepHeight. So the new feature can be suppressed for one dimension.

This requires a change in MeasureOverride:

protected override Size MeasureOverride(Size constraint)
{
    var innerWidth = Math.Min(this._lastArrangeSize.Width, constraint.Width);
    var innerHeight = Math.Min(this._lastArrangeSize.Height, constraint.Height);
    base.MeasureOverride(new Size(innerWidth, innerHeight));

    var outerWidth = KeepWidth ? Child.DesiredSize.Width : 0;
    var outerHeight = KeepHeight ? Child.DesiredSize.Height : 0;
    return new Size(outerWidth, outerHeight);
}