/// <summary>
/// Reads the keyboard state using the <see cref="GameTime"/> from the update frame.
/// </summary>
/// <param name="gameTime"></param>
public void ProcessKeys(GameTime gameTime)
{
this.KeysPressed.Clear();
this.KeysReleased.Clear();
#if !SILVERLIGHT && !SHARPDX
KeyboardState state = Keyboard.GetState();
bool shiftPressed = state.IsKeyDown(Keys.LeftShift) || state.IsKeyDown(Keys.RightShift);
var keys = state.GetPressedKeys();
#elif SHARPDX
Keyboard k = new Keyboard(new DirectInput());
KeyboardState state = k.GetCurrentState();
k.Dispose();
bool shiftPressed = state.IsPressed(Keys.LeftShift) || state.IsPressed(Keys.RightShift);
var keys = state.PressedKeys;
#else
KeyboardState state = Keyboard.GetState();
bool shiftPressed = state.IsKeyDown(Keys.Shift);
var keys = state.GetPressedKeys();
#endif
// Cycle all the keys down known if any are up currently, remove
for (int i = 0; i < this.KeysDown.Count;)
{
#if SHARPDX
if (!state.PressedKeys.Contains(this.KeysDown[i].XnaKey))
#else
if (state.IsKeyUp(this.KeysDown[i].XnaKey))
#endif
{
KeysReleased.Add(this.KeysDown[i]);
this.KeysDown.Remove(this.KeysDown[i]);
}
else
{
i++;
}
}
// For all new keys down, if we don't know them, add them to pressed, add them to down.
#if SHARPDX
for (int i = 0; i < keys.Count; i++)
#else
for (int i = 0; i < keys.Length; i++)
#endif
{
bool firstPressed = false;
Input.AsciiKey key = new AsciiKey();
Input.AsciiKey keyOppositeShift = new AsciiKey();
Input.AsciiKey activeKey;
key.Fill(keys[i], shiftPressed);
keyOppositeShift.Fill(keys[i], !shiftPressed);
if (this.KeysDown.Contains(key))
{
activeKey = this.KeysDown.First(k => k == key);
activeKey.TimeHeld += (float)gameTime.ElapsedGameTime.TotalSeconds;
this.KeysDown.Remove(key);
}
else if (this.KeysDown.Contains(keyOppositeShift))
{
activeKey = this.KeysDown.First(k => k == keyOppositeShift);
activeKey.Character = key.Character;
activeKey.TimeHeld += (float)gameTime.ElapsedGameTime.TotalSeconds;
this.KeysDown.Remove(keyOppositeShift);
}
else
{
activeKey = key;
firstPressed = true;
}
if (firstPressed)
{
this.KeysPressed.Add(activeKey);
}
else if (activeKey.PreviouslyPressed == false && activeKey.TimeHeld >= InitialRepeatDelay)
{
activeKey.PreviouslyPressed = true;
activeKey.TimeHeld = 0f;
this.KeysPressed.Add(activeKey);
}
else if (activeKey.PreviouslyPressed == true && activeKey.TimeHeld >= RepeatDelay)
{
activeKey.TimeHeld = 0f;
this.KeysPressed.Add(activeKey);
}
this.KeysDown.Add(activeKey);
}
}