TreeViewColumn column = new TreeViewColumn("Number", new CellRendererText(), "text", 0); column.SetCellDataFunc(new CellLayoutDataFunc(NumberCellDataFunc)); // function to display number as decimal format private void NumberCellDataFunc(TreeViewColumn column, CellRenderer cell, TreeModel model, TreeIter iter) { int number = (int)model.GetValue(iter, 0); (cell as CellRendererText).Text = number.ToString("D"); }
TreeViewColumn column = new TreeViewColumn("Icon", new CellRendererPixbuf(), "pixbuf", 0); column.SetCellDataFunc(new CellLayoutDataFunc(IconCellDataFunc)); // function to display icon using pixbuf private void IconCellDataFunc(TreeViewColumn column, CellRenderer cell, TreeModel model, TreeIter iter) { string iconPath = (string)model.GetValue(iter, 0); Gdk.Pixbuf icon = new Gdk.Pixbuf(iconPath); (cell as CellRendererPixbuf).Pixbuf = icon; }In both examples, the SetCellDataFunc method is used to set a function that takes parameters for the column, cell, model, and iter, and then displays custom data in the cell using the appropriate cell renderer. The Gdk library is used to work with the pixbuf image format.