将 RawKeyEvent/RawKeyboard 系统迁移到 KeyEvent/HardwareKeyboard 系统

KeyEventResult _handleKeyEvent(RawKeyEvent keyEvent) {
  if (keyEvent.isControlPressed ||
      keyEvent.isShiftPressed ||
      keyEvent.isAltPressed ||
      keyEvent.isMetaPressed) {
    print('Modifier pressed: $keyEvent');
  }
  if (keyEvent.isKeyPressed(LogicalKeyboardKey.keyA)) {
    print('Key A pressed.');
  }
  return KeyEventResult.ignored;
}

KeyEventResult _handleKeyEvent(KeyEvent _) {
  if (HardwareKeyboard.instance.isControlPressed ||
      HardwareKeyboard.instance.isShiftPressed ||
      HardwareKeyboard.instance.isAltPressed ||
      HardwareKeyboard.instance.isMetaPressed) {
    print('Modifier pressed: $keyEvent');
  }
  if (HardwareKeyboard.instance.isLogicalKeyPressed(LogicalKeyboardKey.keyA)) {
    print('Key A pressed.');
  }
  return KeyEventResult.ignored;
}

Widget build(BuildContext context) {
  return Focus(
    onKey: (RawKeyEvent keyEvent) {
      print('Key event: $keyEvent');
      return KeyEventResult.ignored;
    }
    child: child,
  );
}

Widget build(BuildContext context) {
  return Focus(
    onKeyEvent: (KeyEvent keyEvent) {
      print('Key event: $keyEvent');
      return KeyEventResult.ignored;
    }
    child: child,
  );
}

KeyEventResult _handleKeyEvent(RawKeyEvent keyEvent) {
  if (keyEvent is RawKeyDownEvent) {
    print('Key down: ${keyEvent.data.logicalKey.keyLabel}(${keyEvent.repeat ? ' (repeated)' : ''})');
  }
  return KeyEventResult.ignored;
}

KeyEventResult _handleKeyEvent(KeyEvent _) {
  if (keyEvent is KeyDownEvent || keyEvent is KeyRepeatEvent) {
    print('Key down: ${keyEvent.logicalKey.keyLabel}(${keyEvent is KeyRepeatEvent ? ' (repeated)' : ''})');
  }
  return KeyEventResult.ignored;
}