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);

    QGroupBox gbx("&Colors");

    QRadioButton* pradRed   = new QRadioButton("&Red");
    QRadioButton* pradGreen = new QRadioButton("&Green");
    QRadioButton* pradBlue  = new QRadioButton("&Blue");
    pradGreen->setChecked(true);

    //Layout setup 
    QVBoxLayout* pvbxLayout = new QVBoxLayout;
    pvbxLayout->addWidget(pradRed);
    pvbxLayout->addWidget(pradGreen);
    pvbxLayout->addWidget(pradBlue);
    gbx.setLayout(pvbxLayout);

    gbx.show();

    return app.exec();
}