connect(new_session_button_, SIGNAL(clicked(bool)),
this, SLOT(on_new_session_clicked()));
connect(run_stop_button_, SIGNAL(clicked(bool)),
this, SLOT(on_run_stop_clicked()));
connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
this, SLOT(on_capture_state_changed(QObject*)));
connect(new_session_button_, SIGNAL(clicked(bool)),
this, SLOT(on_new_session_clicked()));
connect(run_stop_button_, SIGNAL(clicked(bool)),
this, SLOT(on_run_stop_clicked()));
connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
this, SLOT(on_capture_state_changed(QObject*)));