initialize method

void initialize(Vector2 _screenSize, JoystickController joystickController)

Implementation

void initialize(Vector2 _screenSize, JoystickController joystickController) {
  _joystickController = joystickController;
  double radius = size / 2;
  double dx = 0, dy = 0;
  switch (align) {
    case JoystickActionAlign.TOP_LEFT:
      dx = margin.left + radius;
      dy = margin.top + radius;
      break;
    case JoystickActionAlign.BOTTOM_LEFT:
      dx = margin.left + radius;
      dy = _screenSize.y - (margin.bottom + radius);
      break;
    case JoystickActionAlign.TOP_RIGHT:
      dx = _screenSize.x - (margin.right + radius);
      dy = margin.top + radius;
      break;
    case JoystickActionAlign.BOTTOM_RIGHT:
      dx = _screenSize.x - (margin.right + radius);
      dy = _screenSize.y - (margin.bottom + radius);
      break;
  }
  _rect = Rect.fromCircle(
    center: Offset(dx, dy),
    radius: radius,
  ).toVector2Rect();

  _rectBackgroundDirection = Rect.fromCircle(
    center: Offset(dx, dy),
    radius: _sizeBackgroundDirection / 2,
  ).toVector2Rect();

  _dragPosition = _rect!.center;
}