using System;
using Gtk;

// A namespace with various classes to be used in a text-editing application
namespace TextEditing {
	
	// Main application, uses text-editing classes found in this namespace
	public class SmallTextEditor
	{	
		private Window app;
		private VBox mainBox;
		private ScrolledWindow scroll;
		private TextView textArea;
		private TextBuffer buffer;
		private Toolbar tools;
		private ToolButton newFileButton, openFileButton, saveFileButton;
		
		public SmallTextEditor(string[] args)
		{
			// Do useless stuff with the arguments (will be worked on later)
			foreach (string arg in args)
			{
				Console.WriteLine(arg);
			}
			
			Application.Init();
			
			// Window
			app = new Window("Small editor");
			app.DeleteEvent += new DeleteEventHandler(Exit);
			
			// Containers
			mainBox = new VBox(false, 0);
			scroll = new ScrolledWindow(null, null);
			scroll.SetPolicy(PolicyType.Automatic, PolicyType.Automatic);
			scroll.WindowPlacement = CornerType.BottomLeft;
			
			// Widgets
			textArea = new TextView();
			buffer = textArea.Buffer;
			buffer.Changed += new EventHandler(ScrollDown);
			//buffer.UserActionEnded += new EventHandler(ScrollDown);
			//buffer.UserActionBegun += new EventHandler(ScrollDown);
			tools = new Toolbar();
			
			newFileButton = new ToolButton(Stock.New);
			openFileButton = new ToolButton(Stock.Open);
			saveFileButton = new ToolButton(Stock.Save);
			
			
			// Adding to containers
			tools.Add(newFileButton);
			tools.Add(openFileButton);
			tools.Add(saveFileButton);
			
			scroll.AddWithViewport(textArea);
			
			mainBox.PackStart(tools, false, false, 0);
			mainBox.PackStart(scroll, true, true, 0);
			
			app.Add(mainBox);
			
			app.DefaultWidth = 400;
			app.DefaultHeight = 400;
			app.ShowAll();
			
			Application.Run();
		}
		
		public void ScrollDown(object obj, EventArgs args)
		{
			Console.WriteLine("adjusts");
			scroll.Vadjustment.Value = scroll.Vadjustment.Upper - scroll.Vadjustment.PageSize;
			
		}
		
		public void Exit(object obj, DeleteEventArgs args)
		{
			Application.Quit();
		}
	}
}

// Create an instance of the SmallTextEditor class
class UseTextEditing
{
	public static void Main(string[] args)
	{
		new TextEditing.SmallTextEditor(args);
	}
}