Banshee.Sources.Gui.SourceView.BuildColumns C# (CSharp) Method

        private void BuildColumns ()
        {
            // Hidden expander column
            TreeViewColumn col = new TreeViewColumn ();
            col.Visible = false;
            AppendColumn (col);
            ExpanderColumn = col;

            source_column = new TreeViewColumn ();
            source_column.Sizing = TreeViewColumnSizing.Autosize;

            uint xpad = 2;

            // Special renderer for header rows; hidden for normal source rows
            header_renderer = new CellRendererText () {
                Xpad = xpad,
                Ypad = 4,
                Ellipsize = Pango.EllipsizeMode.End,
                Weight = (int)Pango.Weight.Bold,
                Variant = Pango.Variant.SmallCaps
            };

            // Renderer for source rows; hidden for header rows
            source_renderer = new SourceRowRenderer ();
            source_renderer.Xpad = xpad;

            source_column.PackStart (header_renderer, true);
            source_column.SetCellDataFunc (header_renderer, new Gtk.CellLayoutDataFunc ((layout, cell, model, iter) => {
                var type = (SourceModel.EntryType) model.GetValue (iter, (int)SourceModel.Columns.Type);
                header_renderer.Visible = type == SourceModel.EntryType.Group;
                source_renderer.Visible = type == SourceModel.EntryType.Source;
                if (type == SourceModel.EntryType.Group) {
                    var source = model.GetValue (iter, (int)SourceModel.Columns.Source) as Source;
                    header_renderer.Visible = true;
                    header_renderer.Text = source.Name;
                } else {
                    header_renderer.Visible = false;
                }
            }));

            int width, height;
            Gtk.Icon.SizeLookup (IconSize.Menu, out width, out height);
            source_renderer.RowHeight = RowHeight.Get ();
            source_renderer.RowHeight = height;

            source_renderer.Ypad = (uint)RowPadding.Get ();
            source_renderer.Ypad = 2;
            source_column.PackStart (source_renderer, true);
            source_column.SetCellDataFunc (source_renderer, new CellLayoutDataFunc (SourceRowRenderer.CellDataHandler));
            AppendColumn (source_column);

            HeadersVisible = false;
        }