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PresenterWpf/src/WPFInputHandler.cs

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+using System.Windows;
+using System.Windows.Input;
+using Engine.Input;
+
+namespace PresenterWpf;
+
+public class WpfInputHandler : IInputHandler
+{
+  private readonly Window _window;
+
+  private readonly bool[] _currentKeys = new bool[(int)KeyboardButtonCode.TotalCount];
+  private readonly bool[] _previousKeys = new bool[(int)KeyboardButtonCode.TotalCount];
+  private readonly bool[] _currentMouseButtons = new bool[(int)MouseButtonCode.TotalCount];
+  private readonly bool[] _previousMouseButtons = new bool[(int)MouseButtonCode.TotalCount];
+
+  public WpfInputHandler(Window parWindow)
+  {
+    _window = parWindow;
+
+    _window.PreviewKeyDown += Window_PreviewKeyDown;
+    _window.PreviewKeyUp += Window_PreviewKeyUp;
+    _window.PreviewMouseDown += Window_PreviewMouseDown;
+    _window.PreviewMouseUp += Window_PreviewMouseUp;
+  }
+
+  public void Update(double parDeltaTime)
+  {
+    for (var i = 0; i < _currentKeys.Length; i++)
+    {
+      _previousKeys[i] = _currentKeys[i];
+    }
+
+    for (var i = 0; i < _currentMouseButtons.Length; i++)
+    {
+      _previousMouseButtons[i] = _currentMouseButtons[i];
+    }
+  }
+
+  private void Window_PreviewKeyDown(object parSender, KeyEventArgs parEventArgs)
+  {
+    var keyCode = ConvertToKeyboardButtonCode(parEventArgs.Key);
+    if (keyCode >= 0 && keyCode < _currentKeys.Length)
+    {
+      _currentKeys[keyCode] = true;
+    }
+  }
+
+  private void Window_PreviewKeyUp(object parSender, KeyEventArgs parEventArgs)
+  {
+    var keyCode = ConvertToKeyboardButtonCode(parEventArgs.Key);
+    if (keyCode >= 0 && keyCode < _currentKeys.Length)
+    {
+      _currentKeys[keyCode] = false;
+    }
+  }
+
+  private void Window_PreviewMouseDown(object parSender, MouseButtonEventArgs parEventArgs)
+  {
+    var buttonCode = ConvertToMouseButtonCode(parEventArgs.ChangedButton);
+    if (buttonCode >= 0 && buttonCode < _currentMouseButtons.Length)
+    {
+      _currentMouseButtons[buttonCode] = true;
+    }
+  }
+
+  private void Window_PreviewMouseUp(object parSender, MouseButtonEventArgs parEventArgs)
+  {
+    var buttonCode = ConvertToMouseButtonCode(parEventArgs.ChangedButton);
+    if (buttonCode >= 0 && buttonCode < _currentMouseButtons.Length)
+    {
+      _currentMouseButtons[buttonCode] = false;
+    }
+  }
+
+  public bool IsKeyPressed(KeyboardButtonCode parKeyboardButtonCode)
+  {
+    var keyCode = (int)parKeyboardButtonCode;
+    return _currentKeys[keyCode];
+  }
+
+  public bool IsKeyJustPressed(KeyboardButtonCode parKeyboardButtonCode)
+  {
+    var keyCode = (int)parKeyboardButtonCode;
+    return _currentKeys[keyCode] && !_previousKeys[keyCode];
+  }
+
+  public bool IsMouseButtonPressed(MouseButtonCode parButtonCode)
+  {
+    var buttonCode = (int)parButtonCode;
+    return _currentMouseButtons[buttonCode];
+  }
+
+  public bool IsMouseButtonJustPressed(MouseButtonCode parButtonCode)
+  {
+    var buttonCode = (int)parButtonCode;
+    return _currentMouseButtons[buttonCode] && !_previousMouseButtons[buttonCode];
+  }
+
+  private static int ConvertToKeyboardButtonCode(Key parKey) => parKey switch
+  {
+    Key.A => (int)KeyboardButtonCode.A,
+    Key.B => (int)KeyboardButtonCode.B,
+    Key.C => (int)KeyboardButtonCode.C,
+    Key.D => (int)KeyboardButtonCode.D,
+    Key.E => (int)KeyboardButtonCode.E,
+    Key.F => (int)KeyboardButtonCode.F,
+    Key.G => (int)KeyboardButtonCode.G,
+    Key.H => (int)KeyboardButtonCode.H,
+    Key.I => (int)KeyboardButtonCode.I,
+    Key.J => (int)KeyboardButtonCode.J,
+    Key.K => (int)KeyboardButtonCode.K,
+    Key.L => (int)KeyboardButtonCode.L,
+    Key.M => (int)KeyboardButtonCode.M,
+    Key.N => (int)KeyboardButtonCode.N,
+    Key.O => (int)KeyboardButtonCode.O,
+    Key.P => (int)KeyboardButtonCode.P,
+    Key.Q => (int)KeyboardButtonCode.Q,
+    Key.R => (int)KeyboardButtonCode.R,
+    Key.S => (int)KeyboardButtonCode.S,
+    Key.T => (int)KeyboardButtonCode.T,
+    Key.U => (int)KeyboardButtonCode.U,
+    Key.V => (int)KeyboardButtonCode.V,
+    Key.W => (int)KeyboardButtonCode.W,
+    Key.X => (int)KeyboardButtonCode.X,
+    Key.Y => (int)KeyboardButtonCode.Y,
+    Key.Z => (int)KeyboardButtonCode.Z,
+    Key.LeftCtrl => (int)KeyboardButtonCode.Ctrl,
+    Key.LeftAlt => (int)KeyboardButtonCode.Alt,
+    Key.LeftShift => (int)KeyboardButtonCode.Shift,
+    Key.RightCtrl => (int)KeyboardButtonCode.Ctrl,
+    Key.RightAlt => (int)KeyboardButtonCode.Alt,
+    Key.RightShift => (int)KeyboardButtonCode.Shift,
+    Key.Space => (int)KeyboardButtonCode.Space,
+    Key.Tab => (int)KeyboardButtonCode.Tab,
+    Key.Back => (int)KeyboardButtonCode.Backspace,
+    Key.Return => (int)KeyboardButtonCode.Enter,
+    Key.Escape => (int)KeyboardButtonCode.Escape,
+    Key.PageUp => (int)KeyboardButtonCode.PageUp,
+    Key.PageDown => (int)KeyboardButtonCode.PageDown,
+    Key.Up => (int)KeyboardButtonCode.Up,
+    Key.Down => (int)KeyboardButtonCode.Down,
+    Key.Left => (int)KeyboardButtonCode.Left,
+    Key.Right => (int)KeyboardButtonCode.Right,
+    Key.Delete => (int)KeyboardButtonCode.Delete,
+    Key.Insert => (int)KeyboardButtonCode.Insert,
+    Key.Home => (int)KeyboardButtonCode.Home,
+    Key.End => (int)KeyboardButtonCode.End,
+    _ => -1
+  };
+
+  private static int ConvertToMouseButtonCode(MouseButton parButton) =>
+    parButton switch
+    {
+      MouseButton.Left => (int)MouseButtonCode.Left,
+      MouseButton.Right => (int)MouseButtonCode.Right,
+      MouseButton.Middle => (int)MouseButtonCode.Middle,
+      _ => -1
+    };
+
+  ~WpfInputHandler()
+  {
+    _window.PreviewKeyDown -= Window_PreviewKeyDown;
+    _window.PreviewKeyUp -= Window_PreviewKeyUp;
+    _window.PreviewMouseDown -= Window_PreviewMouseDown;
+    _window.PreviewMouseUp -= Window_PreviewMouseUp;
+  }
+}