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

[Dong Tiger]

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>

> 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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