[Development] QJSEngine debuging

[Michal Dorner]

2012/11/19 Koehne Kai <Kai.Koehne at digia.com>
>
> Hi,
>
> Even if you're not using QML, you might look into using it's debugging
> infrastructure. All you'll probably have to do is create a dummy QQmlEngine
> at the start of your app: Since breakpoints, stepping are global for v8,
> you should be able to debug any JS code run by your app from within Qt
> Creator. With a bit of work you could also implement an Eclipse backend:
> The debugging protocol of QML just wraps the V8 JSON one.
>
> Drop me a mail if you need further links.
>
> Regards
>
> Kai
>


2012/11/19 Kevin Krammer <kevin.krammer at kdab.com>

> On Monday, 2012-11-19, Koehne Kai wrote:
> Also, QML is not tied to UI at all.
>
> Cheers,
> Kevin



Hi,

thanks for all advices. I have looked better into qml and found it solves
all my problems (debuging, importing modules etc. ).
Before i misunderstood qml concept. I thought all qml is deeply connected
with QtQuick and gui.
Maybe some example describing this usecase will not be bad idea.

So, currently i have something like this (inspired by code from QQuickView):

        ......

    qmlRegisterType<Test>("MyModule", 1, 0, "Test");

    engine = new QQmlEngine();


    component = new QQmlComponent(engine, QUrl::fromLocalFile("module.qml"));


    if (!component->isLoading()) {

        onComponentReady();

    } else {

        connect(component,
SIGNAL(statusChanged(QQmlComponent::Status)), this,
SLOT(onComponentReady()));

    }


}



void QmlTest::onComponentReady()

{

    disconnect(component,
SIGNAL(statusChanged(QQmlComponent::Status)), this,
SLOT(onComponentReady()));



    if (component->isError()) {

        QList<QQmlError> errorList = component->errors();

        foreach (const QQmlError &error, errorList) {

            QMessageLogger(error.url().toString().toLatin1().constData(),
error.line(), 0).warning()

                    << error;

        }

        return;

    }




    Test *test = qobject_cast<Test *>( component->create() );


    test->doSomeStuff();



Am i doing it right way?

Regards
Michal
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