[Qt-interest] What QT version is this?

[Scott Sibley]

Right. It's working now, except that the function's not available. Anything
wrong with this?

Evaluator::Evaluator() {
    obj = new QObject();
    QScriptEngine::QObjectWrapOptions opt;
    QScriptValue objVal = engine.newQObject(val, obj,
QScriptEngine::AutoOwnership, opt);
    engine.globalObject().setProperty("lcd", objVal);
    plugin_uptime_init(this);
}

QScriptValue Evaluator::Eval(const char *str) {
    return engine.evaluate(str);
}

void Evaluator::AddFunction(const char *name,
    QScriptValue (*func)(QScriptContext *ctx, QScriptEngine *eng)) {
    QString key = name;
    val.setProperty(key, engine.newFunction(func),
QScriptValue::PropertyGetter);
}


Here's where I'm adding the function:

void plugin_uptime_init(Evaluator *visitor) {
    visitor->AddFunction("uptime", my_uptime);
}


I'm calling the method like this:

std::cout << "Eval: " << (Eval("lcd.uptime()").toString().toStdString()) <<
std::endl;

And it prints:

Eval: ReferenceError: uptime is not defined

On Thu, Oct 15, 2009 at 1:54 AM, Rohan McGovern <rohan.mcgovern at nokia.com>wrote:

> On Thursday 15 October 2009 08:48:23 ext Scott Sibley wrote:
>
> >
> > Evaluator.cpp:26: error: passing 'const QScriptValue' as 'this' argument
> of
> >  'void QScriptValue::setProperty(const QString&, const QScriptValue&,
> const
> >  QFlags<QScriptValue::PropertyFlag>&)' discards qualifiers scons: ***
> >  [Evaluator.o] Error 1
> >
> > void Evaluator::AddFunction(const char *name,
> >     QScriptValue (*func)(QScriptContext *ctx, QScriptEngine *eng)) {
> >     QString key = name;
> >     obj.setProperty(key, engine.newFunction(func),
> >  QScriptValue::PropertyGetter); // line 26 }
> >
>
> > newFunction returns a const QScriptValue. I'm confused. Why does it
> except
> >  a non-const QScriptValue, but not the const?
>
> You're looking at the wrong QScriptValue.  The error is: "error: passing
> 'const QScriptValue' as 'this' argument of ..."
>
> It's telling you: the problem is you're passing a const QScriptValue as the
> "this" argument to a QScriptValue member function not marked as const.  In
> obj.setProperty(...), obj is the "this" argument.
>
> i.e., at line 26, `obj' is const.  If it's const then you can't set
> properties
> on it.
>
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