connect(ui->homeButton, SIGNAL(clicked()), this, SLOT(_home()));
connect(ui->selectToggleButton, SIGNAL(clicked()), this, SLOT(_toggle_selection()));
connect(ui->addButton, SIGNAL(clicked()), this, SLOT(_add()));
connect(ui->homeButton, SIGNAL(clicked()), this, SLOT(_home()));
connect(ui->selectToggleButton, SIGNAL(clicked()), this, SLOT(_toggle_selection()));
connect(ui->addButton, SIGNAL(clicked()), this, SLOT(_add()));