static public void Showing(Page page, Windows.UI.ViewManagement.InputPane sender, Windows.UI.ViewManagement.InputPaneVisibilityEventArgs args)
        {
            const double extraHeightBuffer = 20.0;

            UIElement focused = FocusManager.GetFocusedElement() as UIElement;
            if (null != focused)
            {
                GeneralTransform gt = focused.TransformToVisual(page);
                Point focusedPoint = gt.TransformPoint(new Point(0, focused.RenderSize.Height - 1));
                double bottomOfFocused = focusedPoint.Y + extraHeightBuffer;
                double windowHeight = Window.Current.Bounds.Height;
                double topOfInputPane = windowHeight - args.OccludedRect.Height;
                if (bottomOfFocused > topOfInputPane)
                {
                    var trans = new TranslateTransform();
                    trans.Y = -(bottomOfFocused - topOfInputPane);
                    page.RenderTransform = trans;
                }

                args.EnsuredFocusedElementInView = true;
            }
        }