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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);
//! [0a]
    QScriptEngine engine;
//! [0a]

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

//! [0b]
    QString scriptFileName(":/calculator.js");
    QFile scriptFile(scriptFileName);
    scriptFile.open(QIODevice::ReadOnly);
    engine.evaluate(scriptFile.readAll(), scriptFileName);
    scriptFile.close();
//! [0b]

//! [1]
    QUiLoader loader;
    QFile uiFile(":/calculator.ui");
    uiFile.open(QIODevice::ReadOnly);
    QWidget *ui = loader.load(&uiFile);
    uiFile.close();
//! [1]

//! [2]
    QScriptValue ctor = engine.evaluate("Calculator");
    QScriptValue scriptUi = engine.newQObject(ui, QScriptEngine::ScriptOwnership);
    QScriptValue calc = ctor.construct(QScriptValueList() << scriptUi);
//! [2]

#if !defined(QT_NO_SCRIPTTOOLS)
    QLineEdit *display = qFindChild<QLineEdit*>(ui, "display");
    QObject::connect(display, SIGNAL(returnPressed()),
                     debugWindow, SLOT(show()));
#endif
//! [3]
    ui->show();
    return app.exec();
//! [3]
}