Source/OpenTK/Input/KeyboardDevice.cs

#region --- License ---
/* Copyright (c) 2007 Stefanos Apostolopoulos
 * See license.txt for license info
 */
#endregion

#region --- Using directives ---

using System;

using OpenTK.Input;
using System.Diagnostics;

#endregion

namespace OpenTK.Input
{
    public sealed class KeyboardDevice : IInputDevice
    {
        //private IKeyboard keyboard;
        private bool[] keys = new bool[Enum.GetValues(typeof(Key)).Length];
        private string description;
        private int numKeys, numFKeys, numLeds;
        private IntPtr devID;
        private bool repeat;
        private KeyboardKeyEventArgs args = new KeyboardKeyEventArgs();

        #region --- Constructors ---

        internal KeyboardDevice() { }

        #endregion

        #region --- IKeyboard members ---

        public bool this[Key key]
        {
            get { return keys[(int)key]; }
            internal set
            {
                if (keys[(int)key] != value || KeyRepeat)
                {
                    keys[(int)key] = value;

                    if (value && KeyDown != null)
                    {
                        args.Key = key;
                        KeyDown(this, args);
                    }
                    else if (!value && KeyUp != null)
                    {
                        args.Key = key;
                        KeyUp(this, args);
                    }
                }
            }
        }

        public int NumberOfKeys
        {
            get { return numKeys; }
            internal set { numKeys = value; }
        }

        public int NumberOfFunctionKeys
        {
            get { return numFKeys; }
            internal set { numFKeys = value; }
        }

        public int NumberOfLeds
        {
            get { return numLeds; }
            internal set { numLeds = value; }
        }

        public IntPtr DeviceID
        {
            get { return devID; }
            internal set { devID = value; }
        }

        #region public bool KeyRepeat

        public bool KeyRepeat
        {
            get { return repeat; }
            set { repeat = value; }
        }

        #endregion

        #region KeyDown

        public event EventHandler<KeyboardKeyEventArgs> KeyDown;

        #endregion

        #region KeyUp

        public event EventHandler<KeyboardKeyEventArgs> KeyUp;

        #endregion

        #endregion

        #region --- IInputDevice Members ---

        public string Description
        {
            get { return description; }
            internal set { description = value; }
        }

        public InputDeviceType DeviceType
        {
            get { return InputDeviceType.Keyboard; }
        }

        #endregion

        #region --- Public Methods ---

        public override int GetHashCode()
        {
            //return base.GetHashCode();
            return (int)(numKeys ^ numFKeys ^ numLeds ^ devID.GetHashCode() ^ description.GetHashCode());
        }

        public override string ToString()
        {
            //return base.ToString();
            return String.Format("ID: {0} ({1}). Keys: {2}, Function keys: {3}, Leds: {4}",
                DeviceID, Description, NumberOfKeys, NumberOfFunctionKeys, NumberOfLeds);
        }

        #endregion

        #region --- Internal Methods ---

        #region internal void ClearKeys()

        internal void ClearKeys()
        {
            for (int i = 0; i < keys.Length; i++)
                if (this[(Key)i])       // Make sure KeyUp events are *not* raised for keys that are up, even if key repeat is on.
                    this[(Key)i] = false;
        }

        #endregion

        #endregion
    }
}

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