GtkSharp/sample/tutorial/helloworld/helloworld.cs

// helloworld.cs - Gtk# Tutorial example
//
// Author: Johannes Roith <johannes@jroith.de>
//
// (c) 2002 Johannes Roith

namespace GtkSharpTutorial {

	using Gtk;
	using GtkSharp;
	using System;
	using System.Drawing;


	public class helloworld {

		/* This is a callback function. The data arguments are ignored
		 * in this example. More on callbacks below. */
		static void hello (object obj, EventArgs args)
		{
			Console.WriteLine("Hello World");
			Application.Quit ();
		}

		static void delete_event (object obj, DeleteEventArgs args)
		{
			/* If you return FALSE in the "delete_event" signal handler,
			 * GTK will emit the "destroy" signal. Returning TRUE means
			 * you don't want the window to be destroyed.
			 * This is useful for popping up 'are you sure you want to quit?'
			 * type dialogs. */

			    Console.WriteLine ("delete event occurred\n");
			    Application.Quit ();
		}

		public static void Main(string[] args)
		{
			/* This is called in all GTK applications. Arguments are parsed
			 * from the command line and are returned to the application. */
			Application.Init ();

			/* create a new window */
			Window window = new Window ("helloworld");
			/* When the window is given the "delete_event" signal (this is given
			 * by the window manager, usually by the "close" option, or on the
			 * titlebar), we ask it to call the delete_event () function
			 * as defined above. The data passed to the callback
			 * function is NULL and is ignored in the callback function. */

			window.DeleteEvent += new DeleteEventHandler (delete_event);
    
			/* Sets the border width of the window. */
			window.BorderWidth = 10;
			/*  gtk_container_set_border_width (GTK_CONTAINER (window), 10);*/
    
			/* Creates a new button with the label "Hello World". */
			Button btn = new Button ("Hello World");
    
			/* When the button receives the "clicked" signal, it will call the
			 * function hello() passing it NULL as its argument.  The hello()
			 * function is defined above. */
			btn.Clicked += new EventHandler (hello);

       
			/* This packs the button into the window (a gtk container). */
			window.Add (btn);

			/* The final step is to display this newly created widget. */
			window.ShowAll ();
    

			/* All GTK applications must have a gtk_main(). Control ends here
			* and waits for an event to occur (like a key press or
			* mouse event). 
			* In C#, we use Application.Run(), as used in Windows.Forms*/

			Application.Run ();
    
			}
	}

}