Esempi in C++ (Cpp) per Value::isNullOrUndefined

Esempio n. 1

File: CameraControl.cpp Progetto: caindove/mozilla-central

/* void setExposureCompensation (const JS::Value& aCompensation, JSContext* cx); */
NS_IMETHODIMP
nsCameraControl::SetExposureCompensation(const JS::Value& aCompensation, JSContext* cx)
{
  if (aCompensation.isNullOrUndefined()) {
    // use NaN to switch the camera back into auto mode
    return SetHelper(CAMERA_PARAM_EXPOSURECOMPENSATION, NAN);
  }

  double compensation;
  if (!JS_ValueToNumber(cx, aCompensation, &compensation)) {
    return NS_ERROR_INVALID_ARG;
  }

  return SetHelper(CAMERA_PARAM_EXPOSURECOMPENSATION, compensation);
}