# Qt 4.5: main.cpp Example File (script/calculator/main.cpp)

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# main.cpp Example File
script/calculator/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial Usage
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     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
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     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
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     #include <QApplication>
     #include <QUiLoader>
     #include <QtScript>
     #include <QWidget>
     #include <QFile>
     #include <QMainWindow>
     #include <QLineEdit>

     #ifndef QT_NO_SCRIPTTOOLS
     #include <QScriptEngineDebugger>
     #endif

     int main(int argc, char **argv)
     {
         Q_INIT_RESOURCE(calculator);

         QApplication app(argc, argv);
         QScriptEngine engine;

     #ifndef QT_NO_SCRIPTTOOLS
         QScriptEngineDebugger debugger;
         debugger.attachTo(&engine);
         QMainWindow *debugWindow = debugger.standardWindow();
         debugWindow->resize(1024, 640);
     #endif

         QString scriptFileName(":/calculator.js");
         QFile scriptFile(scriptFileName);
         scriptFile.open(QIODevice::ReadOnly);
         engine.evaluate(scriptFile.readAll(), scriptFileName);
         scriptFile.close();

         QUiLoader loader;
         QFile uiFile(":/calculator.ui");
         uiFile.open(QIODevice::ReadOnly);
         QWidget *ui = loader.load(&uiFile);
         uiFile.close();

         QScriptValue ctor = engine.evaluate("Calculator");
         QScriptValue scriptUi = engine.newQObject(ui, QScriptEngine::ScriptOwnership);
         QScriptValue calc = ctor.construct(QScriptValueList() << scriptUi);

     #ifndef QT_NO_SCRIPTTOOLS
         QLineEdit *display = qFindChild<QLineEdit*>(ui, "display");
         QObject::connect(display, SIGNAL(returnPressed()),
                          debugWindow, SLOT(show()));
     #endif
         ui->show();
         return app.exec();
     }