using System;
using Gtk;

public class SortableTreeView : TreeView	{

	TreeStore ts;
	TreeIter iter;
	TreeViewColumn col0;
	TreeViewColumn col1;

	public SortableTreeView	()	{
		Type[] col_types = {typeof(string), typeof(string)};

		ts = new TreeStore (col_types);
		ts.SetSortFunc (0, col0_compare, IntPtr.Zero, null); // use col0_compare to sort

		iter = new TreeIter ();

		AddRow ("1,1", "1,2");
		AddRow ("2,1", "2,2");
		
		
		this.Model = ts;
		this.HeadersClickable = true;
		this.HeadersVisible = true;

		col0 = new TreeViewColumn ();
		col0.Clickable = true;
		col0.Title = "Column 1";
		CellRendererText col0_renderer = new CellRendererText ();
		col0.PackStart (col0_renderer, true);
		col0.AddAttribute (col0_renderer, "text", 0);
		col0.Clicked += new EventHandler (col0_clicked);
		this.AppendColumn (col0);

		col1 = new TreeViewColumn ();
		col1.Title = "Column 2";
		CellRendererText col1_renderer = new CellRendererText ();
		col1.PackStart (col1_renderer, true);
		col1.AddAttribute (col1_renderer, "text", 1);
		this.AppendColumn (col1);
	}

	public void AddRow (string val1, string val2)	{
		ts.Append (out iter);
		ts.SetValue (iter, 0, val1);
		ts.SetValue (iter, 1, val2);
	}

	public int col0_compare (TreeModel model, TreeIter tia, TreeIter tib)	{
		return String.Compare ((string) model.GetValue (tia, 0),
				(string) model.GetValue (tib, 0));
	}

	private void col0_clicked (object o, EventArgs args)	{
		col0.SortOrder = SetSortOrder (col0); // set order asc or desc
		col0.SortIndicator = true; // turn on sort indicator
		ts.SetSortColumnId (0, col0.SortOrder);
	}

	public SortType SetSortOrder (TreeViewColumn col)	{
		if (col.SortIndicator)  {
			if (col.SortOrder == SortType.Ascending)
				return SortType.Descending;
			else return SortType.Ascending;
		}
		else return SortType.Ascending;
	}

	public static void Main ()	{
		Application.Init ();

		Window win = new Window ("TreeIterCompareFunc Example");
		win.DeleteEvent += new DeleteEventHandler (delete_event);
		win.SetDefaultSize (400, 250);

		ScrolledWindow sw = new ScrolledWindow ();
		win.Add (sw);

		SortableTreeView stv = new SortableTreeView ();
		sw.Add (stv);

		win.ShowAll ();
		Application.Run ();
	}

	private static void delete_event (object o, DeleteEventArgs args)	{
		Application.Quit ();
	}
		
}