Qt 4.8: main.cpp Example File (script/marshal/main.cpp)

Qt Reference Documentation

# main.cpp Example File

script/marshal/main.cpp

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     #include <QtCore>
     #include <QtScript>

     template <class Container>
     QScriptValue toScriptValue(QScriptEngine *eng, const Container &cont)
     {
         QScriptValue a = eng->newArray();
         typename Container::const_iterator begin = cont.begin();
         typename Container::const_iterator end = cont.end();
         typename Container::const_iterator it;
         for (it = begin; it != end; ++it)
             a.setProperty(quint32(it - begin), eng->toScriptValue(*it));
         return a;
     }

     template <class Container>
     void fromScriptValue(const QScriptValue &value, Container &cont)
     {
         quint32 len = value.property("length").toUInt32();
         for (quint32 i = 0; i < len; ++i) {
             QScriptValue item = value.property(i);
             typedef typename Container::value_type ContainerValue;
             cont.push_back(qscriptvalue_cast<ContainerValue>(item));
         }
     }

     typedef QVector<int> IntVector;
     typedef QVector<QString> StringVector;

     Q_DECLARE_METATYPE(IntVector)
     Q_DECLARE_METATYPE(StringVector)

     int main(int argc, char *argv[])
     {
         QCoreApplication app(argc, argv);

         QScriptEngine eng;
         // register our custom types
         qScriptRegisterMetaType<IntVector>(&eng, toScriptValue, fromScriptValue);
         qScriptRegisterMetaType<StringVector>(&eng, toScriptValue, fromScriptValue);

         QScriptValue val = eng.evaluate("[1, 4, 7, 11, 50, 3, 19, 60]");

         fprintf(stdout, "Script array: %s\n", qPrintable(val.toString()));

         IntVector iv = qscriptvalue_cast<IntVector>(val);

         fprintf(stdout, "qscriptvalue_cast to QVector<int>: ");
         for (int i = 0; i < iv.size(); ++i)
             fprintf(stdout, "%s%d", (i > 0) ? "," : "", iv.at(i));
         fprintf(stdout, "\n");

         val = eng.evaluate("[9, 'foo', 46.5, 'bar', 'Qt', 555, 'hello']");

         fprintf(stdout, "Script array: %s\n", qPrintable(val.toString()));

         StringVector sv = qscriptvalue_cast<StringVector>(val);

         fprintf(stdout, "qscriptvalue_cast to QVector<QString>: ");
         for (int i = 0; i < sv.size(); ++i)
             fprintf(stdout, "%s%s", (i > 0) ? "," : "", qPrintable(sv.at(i)));
         fprintf(stdout, "\n");

         return 0;
     }