CODEWITHSUNDEEP
javascriptc++qtqml
nib
nib

Reputation: 720

Is it possible to access anything inside QScriptValue holding QVariantMap from qml?

Hi there I want pass javascript function to c++ code from qml and later call it, but stuck with QScriptValue holding QVariantMap, which dont want to be accessed from javascript. Am I doing everything in right way and can I do what I want without hacks? Im using QtQuick1.1 and Qt 5.5.0.

I have c++ class with method:

void SomeClass::setQmlCallback(const QScriptValue &fn)
{
    QScriptValue scriptFn = fn;
    QScriptValueList args;

    QVariantMap m;
    m.insert(QStringLiteral("a"), 96);
    m.insert(QStringLiteral("b"), 97);
    args << scriptFn.engine()->newVariant(m); // To pass VariantMap to qml I wrap it in ScriptValue

    scriptFn.call(scriptFn, args);
}

And some qml code:

onSomethingHappend: {
SomeClass.setQmlCallback(function(row) {
//        console.log(row.a); // NotOk
//        row's key `a` is undefined here
        var convertedToVariant = SomeClass.convertToVariant(row);
        console.log(convertedToVariant.a); // Ok
});
}

Hack to explicitly convert ScriptValue to Variant:

QVariant SomeClass::convertToVariant(const QVariant &v)
{
        return v;
}

Also if I will pass QString instead of QVariantMap everything will work

Upvotes: 0

Views: 340

Answers (1)

nib
nib

Reputation: 720

I dont know why, but changing QScriptEngine::newVariant to QScriptEngine::toScriptValue solves the issue so I can access passed QVariantMap as js object without hacks.

Upvotes: 1

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