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A simple example of the Thumb Wheel component

This example shows a thumb-wheel widget whose value range is set from -100 to 100. An LCDNumber display shows the value of the thumb-wheel.

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 #include <QtGui/QApplication>
 #include <QtGui/QLCDNumber>
 #include <QtGui/QDialog>
 #include <QtGui/QLayout>
 #include <qtthumbwheel.h>

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QDialog dialog;

     QtThumbWheel *wheel = new QtThumbWheel(&dialog);
     wheel->setRange(-100, 100);

     QLCDNumber *lcd = new QLCDNumber(&dialog);
     QObject::connect(wheel, SIGNAL(valueChanged(int)), lcd, SLOT(display(int)));

     QVBoxLayout *vbox = new QVBoxLayout(&dialog);
     vbox->addWidget(wheel);
     vbox->addWidget(lcd);

     dialog.show();
     return app.exec();
 }