adding multiple qslider and qspinner

Question

I add QSlider and QSpinBox with this code

QSpinBox *spinner2 = new QSpinBox;
QSlider *slider2   = new QSlider(Qt::Vertical);
spinner2->setRange(2,100);
slider2->setRange(2,100);
QObject::connect(spinner2, SIGNAL(valueChanged(int)), slider2, SLOT(setValue(int)));
QObject::connect(slider2, SIGNAL(valueChanged(int)), spinner2, SLOT(setValue(int)));
spinner2->setValue(10);

QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(slider2);
layout->addWidget(spinner2);

I would like to add 30 of them, how can I do it by a loop?

Answer 1

I would do that in the following way:

QWidget *widget = new QWidget;

// The main layout of the widget that will hold multiple spinner-slider pairs.
QVBoxLayout *mainLayout = new QVBoxLayout;

for (int i = 0; i < 30; i++) {
    QSpinBox *spinner2 = new QSpinBox(widget);
    QSlider *slider2   = new QSlider(Qt::Vertical, widget);
    spinner2->setRange(2, 100);
    slider2->setRange(2, 100);
    QObject::connect(spinner2, SIGNAL(valueChanged(int)), slider2, SLOT(setValue(int)));
    QObject::connect(slider2, SIGNAL(valueChanged(int)), spinner2, SLOT(setValue(int)));
    spinner2->setValue(10);

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(slider2);
    layout->addWidget(spinner2);

    mainLayout->addLayout(layout);
}

widget->setLayout(mainLayout);