BlueSky.Windows.DataGridAlignCol.Update C# (CSharp) Method

        public void Update()
        {
            double totalWidth = 0;
            int maxNestedLevels = 0;

            // initialize grid
            var panel = new Grid();
            panel.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(DataGridValueLablesCol.LevelHeaderHeight) });
            panel.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(DataGridValueLablesCol.LevelHeaderHeight) });
            foreach (var col in InnerColumns)
            {
                // support nested scenarios
                var cc = col as DataGridValueLablesCol;
                if (cc != null)
                {
                    cc.Update();
                    maxNestedLevels = Math.Max(cc.NestedLevels, maxNestedLevels);
                }

                panel.ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(col.Width.Value) });
                totalWidth += col.Width.Value;
            }

            // add global header
            var globalHeader = new ContentControl() { Content = CompositeHeader };
            Grid.SetColumnSpan(globalHeader, InnerColumns.Count);
            panel.Children.Add(globalHeader);

            // add individual headers
            for (int i = 0; i < InnerColumns.Count; i++)
            {
                var col = InnerColumns[i];

                // add nested headers
                var content = new DataGridColumnHeaderPresenter() { Content = col.Header, Background = new SolidColorBrush(Colors.Transparent) };
                Grid.SetColumn(content, i);
                Grid.SetRow(content, 1);
                panel.Children.Add(content);
            }

            // update header & global width
            Header = panel;
            Width = new C1.WPF.DataGrid.DataGridLength(totalWidth);
            NestedLevels = 1 + maxNestedLevels;
        }