main.cpp

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// ======================================================================
//  main.cpp
// ======================================================================
//                   This file is a part of the book 
//             "Qt 5.10 Professional programming with C++"
//                       http://qt-book.com
// ======================================================================
//  Copyright (c) 2017 by Max Schlee
// ======================================================================

#include <QtWidgets>

// ----------------------------------------------------------------------
int main (int argc, char** argv)
{
    QApplication app(argc, argv);

    QWidget  wgt;
    QSlider* psld = new QSlider(Qt::Horizontal);
    QLabel*  plbl = new QLabel("3");

    psld->setRange(0, 9);
    psld->setPageStep(2);
    psld->setValue(3);
    psld->setTickInterval(2);
    psld->setTickPosition(QSlider::TicksBelow);
    QObject::connect(psld, SIGNAL(valueChanged(int)), 
                     plbl, SLOT(setNum(int))
                    );

    //Layout setup
    QHBoxLayout* phbxLayout = new QHBoxLayout;
    phbxLayout->addWidget(psld);    
    phbxLayout->addWidget(plbl); 
    wgt.setLayout(phbxLayout);

    wgt.show();

    return app.exec();
}