Method layoutIfNeeded

snap_drawing/src/snap_drawing/cpp/Layers/LayerRoot.cpp:255–271

                                  lastEvent.getActionIndex(),
                                  lastEvent.getPointerLocations(),
                                  currentTime,
                                  lastEvent.getOffsetSinceSource() + offsetSinceLastEvent,
                                  lastEvent.getSource()));
    return true;
}

EventId LayerRoot::enqueueEvent(EventCallback&& eventCallback, Duration after) {
    auto eventId = _eventQueue.enqueue(after, std::move(eventCallback));
    enqueueFrame();
    return eventId;
}

bool LayerRoot::cancelEvent(EventId eventId) {
    return _eventQueue.cancel(eventId);
}

void LayerRoot::enqueueFrame() {
    if (canEnqueueFrame() && _listener != nullptr) {
        _didEnqueueFrame = true;
        _listener->onNeedsProcessFrame(*this);