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# main.cpp Example File
tutorial/t8/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QApplication>
     #include <QFont>
     #include <QGridLayout>
     #include <QPushButton>

     #include "cannonfield.h"
     #include "lcdrange.h"

     class MyWidget : public QWidget
     {
     public:
         MyWidget(QWidget *parent = 0);
     };

     MyWidget::MyWidget(QWidget *parent)
         : QWidget(parent)
     {
         QPushButton *quit = new QPushButton(tr("Quit"));
         quit->setFont(QFont("Times", 18, QFont::Bold));

         connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));

         LCDRange *angle = new LCDRange;
         angle->setRange(5, 70);

         CannonField *cannonField = new CannonField;

         connect(angle, SIGNAL(valueChanged(int)),
                 cannonField, SLOT(setAngle(int)));
         connect(cannonField, SIGNAL(angleChanged(int)),
                 angle, SLOT(setValue(int)));

         QGridLayout *gridLayout = new QGridLayout;
         gridLayout->addWidget(quit, 0, 0);
         gridLayout->addWidget(angle, 1, 0);
         gridLayout->addWidget(cannonField, 1, 1, 2, 1);
         gridLayout->setColumnStretch(1, 10);
         setLayout(gridLayout);

         angle->setValue(60);
         angle->setFocus();
     }

     int main(int argc, char *argv[])
     {
         QApplication app(argc, argv);
         MyWidget widget;
         widget.setGeometry(100, 100, 500, 355);
         widget.show();
         return app.exec();
     }