bind static method

void bind(
  1. Keybinding keybinding,
  2. Function callback
)

Binds the callback to keybinding in the Keybinder.

callback can be provided as a Function without a parameter, as a ValueChanged<bool> callback (a function with a single boolean parameter,) or as a KeybindingEvent, which has a Keybinding parameter and a boolean parameter: void Function(Keybinding keybinding, bool pressed).

Implementation

static void bind(Keybinding keybinding, Function callback) {
  assert(
      callback is VoidCallback ||
          callback is ValueChanged<bool> ||
          callback is KeybindingEvent,
      '[callback] must be a [VoidCallback], `ValueChanged<bool>`, '
      'or a [KeybindingEvent].');

  // Initialize the [HardwareKeyboard] listener, if it hasn't already been.
  if (_hardwareKeyboard == null) _init();

  // Add the callback to the [_keybindings] map.
  if (_keybindings.containsKey(keybinding)) {
    _keybindings[keybinding]!.add(callback);
  } else {
    _keybindings.addAll({
      keybinding: [callback],
    });
  }
}