disconnect(signalbase.get(), SIGNAL(samples_cleared()),
this, SLOT(on_data_updated()));
disconnect(signalbase.get(), SIGNAL(samples_added(uint64_t, uint64_t, uint64_t)),
disconnect(signalbase.get(), SIGNAL(samples_cleared()),
this, SLOT(on_data_updated()));
disconnect(signalbase.get(), SIGNAL(samples_added(uint64_t, uint64_t, uint64_t)),