ProgressRing does not collapse if IsActive="False"

[davikor]

I recently updated my project from MahApps 1.5 to 1.6.1 and discovered that the ProgressRing control does not collapse anymore, when its IsActiveproperty is set to False.

Since I position this control on top of other controls, I cannot interact with the underlying controls anymore, or at least not with the parts that are covered by the progress ring.

I think this behavior change is a bug, because ProgressRings are likely to be used on top of other controls, therefore the old collapse behavior was better suited in my opinion.

As a workaround I use the following Blend Behavior, which sets the Visibility-property to collapsed when IsActive changes to false

public class CollapseBehavior : Behavior<ProgressRing>
{
    protected override void OnAttached()
    {
        base.OnAttached();
        SetVisibility();
        DependencyPropertyDescriptor.FromProperty(ProgressRing.IsActiveProperty, typeof(ProgressRing))
            .AddValueChanged(AssociatedObject, OnIsActiveChanged);
    }

    protected override void OnDetaching()
    {
        base.OnDetaching();
        DependencyPropertyDescriptor.FromProperty(ProgressRing.IsActiveProperty, typeof(ProgressRing))
            .RemoveValueChanged(AssociatedObject, OnIsActiveChanged);
    }

    private void OnIsActiveChanged(object sender, EventArgs eventArgs)
    {
        SetVisibility();
    }

    private void SetVisibility()
    {
        AssociatedObject.Visibility = AssociatedObject.IsActive ? Visibility.Visible : Visibility.Collapsed;
    }
}

However, I would prefer to remove this behavior again with an upcoming version of MahApps.