Separating GUI into classes

I am wanting to neaten up my classes, and need some advise how to proceed.
Currently in my main file I have

Code:

{
    QApplication app(argc, argv);
    Client client;
    client.show();
    return client.exec();
}

In my Client constructor I have

Code:

QGridLayout *mainLayout = new QGridLayout;
    mainLayout->addWidget(inputOptionsGroup(), 1, 0, 1, 2);
    mainLayout->addWidget(resultsGroup(), 2, 0, 1, 2);
    setLayout(mainLayout);

and then in resultsGroup (similar to inputOptionsGroup)

Code:

QGroupBox *Client::resultsGroup()
{
    eccentricityLabel = new QLabel(tr("<b>Eccentricity</b>"));
    diameterLabel = new QLabel(tr("<b>Diameter</b>"));
    eccentricityLineEdit = new QLineEdit("0");
    eccentricityLineEdit->setReadOnly(true);
    diameterLineEdit = new QLineEdit("0");
    diameterLineEdit->setReadOnly(true);
    connectionStateLabel = new QLabel("<font color='red'><b>State : Not connected to camera</b></font>");
    dbConnectionLabel = new QLabel("<font color='purple'><b>Connecting to MySQL DB...</b></font>");
    countLabelPass = new QLabel("<font color='green'><b>Pass : 0</b></font>");
    countLabelFail = new QLabel("<font color='red'><b>Fail (Con/Dia/Total) : 0/0/0</b></font>");
 
    queryLineEdit = new QLineEdit;
 
    QGridLayout *vbox = new QGridLayout;
    vbox->addWidget(eccentricityLabel, 0, 0, 1, 1);
    vbox->addWidget(eccentricityLineEdit, 0, 1, 1, 1);
    vbox->addWidget(diameterLabel, 1, 0, 1, 1);
    vbox->addWidget(diameterLineEdit, 1, 1, 1, 1);
    vbox->addWidget(connectionStateLabel, 2, 0, 1, 2);
    vbox->addWidget(dbConnectionLabel, 3, 0, 1, 2);
    vbox->addWidget(queryLineEdit, 4, 0, 1, 2);
    vbox->addWidget(countLabelPass,5, 0, 1, 2);
    vbox->addWidget(countLabelFail,6, 0, 1, 2);
 
    QGroupBox *groupBox = new QGroupBox(tr("Results"));
    groupBox->setLayout(vbox);
 
    return groupBox;
}

Essentially I am splitting up the various pieces of the GUI setup into separate functions. I would instead like to move the whole GUI setup to a separate class. I know this is probably simple to some, but I don't know how to do it, and I have been searching.

My fear is that I am going to fall into problems trying to access various components on the GUI, but I would assumedly get round this using slots/signals.

Thanks.