OpenTK Keyboard Input Example

using System;
using OpenTK;
using OpenTK.Input;
namespace OpenTKKey
{
	class MainClass : GameWindow
	{
		// 1. Exit using keyboard event handler
		// 2. Exit by using method of OpenTK GameWindow
		// 3. By using the Keyboard property
 
		protected override void OnLoad (EventArgs e)
		{
			// 1
			Keyboard.KeyDown += HandleKeyDown;
		}
 
		// 1
		void HandleKeyDown (object sender, KeyboardKeyEventArgs e)
		{
			if (e.Key == Key.Escape) Exit ();
		}
 
		// 2
		protected override void OnKeyPress (OpenTK.KeyPressEventArgs e)
		{
			// This brings this Exact string "Escape"
			// If you don not want to use Windows.Forms assembly then
			// check against plain charachters else you do it like this
			// for type value safety: System.Windows.Forms.Keys.Q
			if (e.KeyChar == 'q' || e.KeyChar == 'Q')
				Exit ();
		}
 
		// 3
		protected override void OnUpdateFrame (FrameEventArgs e)
		{
			if (Keyboard[Key.Space])
				Exit ();
 
			base.OnUpdateFrame (e);
		}
 
		public static void Main (string[] args)
		{
			using (var m = new MainClass()) {
				m.Run ();
			}
		}
	}
}