A messy example showing use of the GTK# TreeView

testingTreeView.cs

using System;
using System.IO;
using Gtk;

namespace DemoII
{
	public class FruitTreePiece
	{
		public string name;
		public string description;
		public int    quantity;
		public bool   isKindNotType;
		
		public FruitTreePiece ( string name, string description, int quantity, bool isKindNotType )
		{
			this.name          = name;
			this.description   = description;
			this.quantity      = quantity;
			this.isKindNotType = isKindNotType;
		}
		
		public static void iwanttobealambda (TreeViewColumn column, CellRenderer cell, TreeModel model, TreeIter iter)
		{
			FruitTreePiece piece = (FruitTreePiece) model.GetValue (iter, 0);
			(cell as Gtk.CellRendererText).Text = piece.name;
		}
		
		public static void makeMyTree (Gtk.TreeView kevinTree)
		{
			//kevinTree.AppendColumFn ("A column with strings...", new Gtk.CellRendererText (), "text", 0);
			Gtk.TreeViewColumn col = new Gtk.TreeViewColumn ();
			Gtk.CellRendererText r = new Gtk.CellRendererText ();
			col.PackStart (r, true);
			col.SetCellDataFunc (r, new Gtk.TreeCellDataFunc (iwanttobealambda));
			kevinTree.AppendColumn (col);
			
			// model
			Gtk.TreeStore kevinModel;
			Gtk.TreeIter fruit, redFruit, cherry;
			kevinModel = new Gtk.TreeStore ( typeof (FruitTreePiece) );
			
			fruit    = kevinModel.AppendValues (new FruitTreePiece ("fruit", "not vegetables", 0, true));
			redFruit = kevinModel.AppendValues (fruit,    new FruitTreePiece ("apple", "Tasty red tree growing things.", 15, true));
			cherry   = kevinModel.AppendValues (redFruit, new FruitTreePiece ("cherry", "Sweet and maybe sour!", 12, true));
			
			kevinModel.AppendValues (cherry,   new FruitTreePiece ("bing cherry", "", 1, false));
			kevinModel.AppendValues (redFruit, new FruitTreePiece ("strawberry", "", 1, false));
			kevinModel.AppendValues (fruit,    new FruitTreePiece ("pear", "", 1, false));
							
			// model -> view
			kevinTree.Model = kevinModel;
			
			return;
		}
	}
	
	public class FileTreeView : Gtk.TreeView {
		public Gtk.TreeView target;  // tree view we're going to asign a new model to
		
		public FileTreeView (Gtk.TreeView target)
		{
			this.target = target;
		}
		
		protected override bool OnButtonPressEvent (Gdk.EventButton e)
		{
			Gtk.TreeIter iter;
			Gtk.TreePath path;
			
			System.Console.WriteLine ("There's been a button press!");
			
			// given this click event, get its window path
			path = new Gtk.TreePath ();
			GetPathAtPos (System.Convert.ToInt16 (e.X), System.Convert.ToInt16 (e.Y), out path);
			
			// given the path, get some data out of the model for this item
			if (this.Model.GetIter (out iter, path)) {
				FruitTreePiece piece = (FruitTreePiece) this.Model.GetValue (iter, 0);
				string name = piece.name;
				System.Console.WriteLine ("Selected row during click: " + name);
			
				FruitTreePiece.makeMyTree(this.target);
			}
			
			return base.OnButtonPressEvent (e);
		}
	}
	
	
	class Demo
	{
		public static void Main (string[] args)
		{
			Application.Init ();

			Gtk.TreeView tree1, tree2;
			tree2 = new Gtk.TreeView ();
			tree1 = new FileTreeView (tree2);
			
			FruitTreePiece.makeMyTree (tree1);
			
			new TwoTreeWindow ("Reference", "", tree1, "Test", tree2);
			Application.Run ();
		}
		
	}
	
	class TwoTreeWindow
	{
		public TwoTreeWindow (string titleText, string labelText1, Gtk.TreeView treeview1, string labelText2, Gtk.TreeView treeview2)
		{
			// overall
			Gtk.Window win;
			Gtk.VBox box;
			Gtk.HPaned panes;
			win = new Gtk.Window (titleText);
			box = new Gtk.VBox ();
			box.Spacing = 6;
			panes = new Gtk.HPaned ();
			panes.Position = 400;
			
			// frame1
			Gtk.Frame fr1;
			Gtk.Label label1;
			Gtk.Alignment align1;
			Gtk.ScrolledWindow sw1;
			fr1 = new Gtk.Frame ();
			fr1.ShadowType = (Gtk.ShadowType) 0;
			label1 = new Gtk.Label ();
			label1.UseMarkup = true;
			label1.LabelProp = "<b>" + labelText1 + "</b>";
			align1 = new Gtk.Alignment (0F, 0F, 1F, 1F);
			sw1 = new Gtk.ScrolledWindow ();
			sw1.ShadowType = (Gtk.ShadowType) 1;
			treeview1.CanFocus = true;
			
			// frame2
			Gtk.Frame fr2;
			Gtk.Label label2;
			Gtk.Alignment align2;
			Gtk.ScrolledWindow sw2;
			fr2 = new Gtk.Frame ();
			fr2.ShadowType = (Gtk.ShadowType) 0;
			label2 = new Gtk.Label ();
			label2.UseMarkup = true;
			label2.LabelProp = "<b>" + labelText2 + "</b>";
			align2 = new Gtk.Alignment (0F, 0F, 1F, 1F);
			sw2 = new Gtk.ScrolledWindow ();
			sw2.ShadowType = (Gtk.ShadowType) 1;
			treeview2.CanFocus = true;
			
			// frame 1 connections
			sw1.Add (treeview1);
			align1.Add (sw1);
			fr1.Add (align1);
			fr1.LabelWidget = label1;
			panes.Add (fr1);
			
			// frame 2 connections
			sw2.Add (treeview2);
			align2.Add (sw2);
			fr2.Add (align2);
			fr2.LabelWidget = label2;
			panes.Add (fr2);	
			
			// status bar
			Gtk.Statusbar sbar;
			sbar = new Gtk.Statusbar ();
			sbar.Spacing = 6;
			
			// ???
			Gtk.HPaned.PanedChild pc1;
			pc1 = (Gtk.Paned.PanedChild) panes [fr1];
			pc1.Resize = false;

			// vbox connections
			Gtk.Box.BoxChild boxchild1;
			Gtk.Box.BoxChild boxchild2;
			box.Add (panes);
			box.Add (sbar);
			boxchild1 = (Gtk.Box.BoxChild) box [panes];
			boxchild1.Position = 0;
			boxchild2 = (Gtk.Box.BoxChild) box [sbar];
			boxchild2.Position = 1;
			boxchild2.Expand = false;
			boxchild2.Fill = false;
			win.Add (box);
			win.DefaultWidth = 800;
			win.DefaultHeight = 600;
			
			// display
			if (win.Child != null) {
				win.Child.ShowAll ();
			}
			win.Show ();
		}
	}
}