Fluent.InRibbonGallery.OnResizeBothDelta C# (CSharp) Method

        private void OnResizeBothDelta(object sender, DragDeltaEventArgs e)
        {
            if (double.IsNaN(scrollViewer.Height)) scrollViewer.Height = scrollViewer.ActualHeight;
            scrollViewer.Height = Math.Min(Math.Max(galleryPanel.GetItemSize().Height, scrollViewer.Height + e.VerticalChange), MaxDropDownHeight);

            menuPanel.Width = Double.NaN;
            if (Double.IsNaN(galleryPanel.Width)) galleryPanel.Width = galleryPanel.ActualWidth;
            galleryPanel.Width = Math.Max(galleryPanel.Width + e.HorizontalChange, minimalGallerylWidth);

        }