[Qt-interest] QScriptValue::setPrototype doens't work in Qt4.6?

[Dong Tiger]

Bug is fired:

http://bugreports.qt.nokia.com/browse/QTBUG-7066

The sample code attached to this bug is updated. If method1 or method2 can
be fixed to work, that will be great.


2009/12/29 Kent Hansen <khansen at trolltech.com>

> Hi,
> Method 3 works here after I modify your queryProperty() to return
> Handles{Read,Write}Access.
> But if the other methods work with 4.5 but not with 4.6, that sounds
> like unintended regressions. I recommend creating a task at
> bugreports.qt.nokia.com.
>
> Regards,
> Kent
>
>
>
> Dong Tiger skrev:
> > Sorry, the sample code should be as following. And I've verified that
> > method 1-4 work with Qt4.5.
> >
> > #include <QScriptEngine>
> > #include <QCoreApplication>
> > #include <QScriptClass>
> > #include <QtDebug>
> >
> > class ResolveClass : public QScriptClass {
> >  public:
> >   ResolveClass(QScriptEngine *engine) : QScriptClass(engine) {}
> >   QScriptValue property(const QScriptValue &obj, const QScriptString
> > &name, uint id) {
> >     qDebug() << name;
> >     return QScriptValue();
> >   }
> >   QueryFlags queryProperty(const QScriptValue &obj, const
> > QScriptString &name, QueryFlags flags, uint *id) {
> >     qDebug() << name;
> >     return 0;
> >   }
> > };
> >
> > int main(int argc, char **argv) {
> >   QCoreApplication app(argc, argv);
> >   QScriptEngine engine;
> >   ResolveClass resolve_class(&engine);
> >
> >   // method1: doesn't work.
> >   // engine.globalObject().setScriptClass(&resolve_class);
> >
> >   // method2: doesn't work.
> >   //
> engine.globalObject().setPrototype(engine.newObject(&resolve_class));
> >
> >   // method3: doesn't work.
> >   // engine.setGlobalObject(engine.newObject(&resolve_class));
> >
> >   // method4: doesn't work.
> >   // QScriptValue global = engine.newObject();
> >   // global.setPrototype(engine.newObject(&resolve_class));
> >   // engine.setGlobalObject(global);
> >
> >   // This works but not what I need.
> >   QScriptValue global = engine.newObject();
> >   global.setProperty("b", 200);
> >   engine.setGlobalObject(global);
> >
> >   engine.evaluate("var a = 100; a = b;");
> >   QScriptValue a = engine.globalObject().property("a");
> >   qDebug() << a.toInt32() << "\n";
> >   return 0;
> > }
> >
> >
> > 2009/12/28 Dong Tiger <idlecat511 at gmail.com <mailto:idlecat511 at gmail.com
> >>
> >
> >     Hi,
> >
> >     My code that works with Qt4.5 doesn't work with 4.6. I wrote a
> >     short code to demonstrate the problem. What I want to do is trying
> >     to get ResolveClass::property being called when a global variable
> >     b is referred.
> >
> >     #include <QCoreApplication>
> >     #include <QScriptEngine>
> >     #include <QScriptClass>
> >     #include <QtDebug>
> >
> >     class ResolveClass : public QScriptClass {
> >      public:
> >       ResolveClass(QScriptEngine *engine) : QScriptClass(engine) {}
> >       QScriptValue property(const QScriptValue &obj, const
> >     QScriptString &name, uint id) {
> >         qDebug() << name;
> >       }
> >     };
> >
> >     int main(int argc, char **argv) {
> >       QCoreApplication app(argc, argv);
> >       QScriptEngine engine;
> >       ResolveClass resolve_class(&engine);
> >
> >       // method1: doesn't work.
> >       // engine.globalObject().setScriptClass(&resolve_class);
> >
> >       // method2: works with 4.5 but not with 4.6.
> >       //
> >     engine.globalObject().setPrototype(engine.newObject(&resolve_class));
> >
> >       // method3: doesn't work.
> >       // engine.setGlobalObject(engine.newObject(&resolve_class));
> >
> >       // method4: doesn't work.
> >       // QScriptValue global = engine.newObject();
> >       // global.setPrototype(engine.newObject(&resolve_class));
> >       // engine.setGlobalObject(global);
> >
> >       // This works but not what I need.
> >       QScriptValue global = engine.newObject();
> >       global.setProperty("b", 200);
> >       engine.setGlobalObject(global);
> >
> >       engine.evaluate("var a = 100; a = b;");
> >       QScriptValue a = engine.globalObject().property("a");
> >       qDebug() << a.toInt32() << "\n";
> >       return 0;
> >     }
> >
> >     I don't have Qt4.5 at hand so I didn't verify if these methods
> >     work with Qt4.5 except method2.
> >     Any  idea of that? Thanks in advance.
> >
> >     --
> >     Tiger
> >
> >
> > ------------------------------------------------------------------------
> >
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