[Interest] QQmlPropertyList x QList in hybrid C++/QML APIs

[Sandro Andrade]

On Sun, Jun 16, 2013 at 6:27 AM, Stephen Kelly <stephen.kelly at kdab.com> wrote:
> On Friday, June 14, 2013 16:43:12 Sandro Andrade wrote:
>> Am I missing something ?
>
> The QML engine doesn't use the QVariant API for accessing things in a
> QVariant. So capabilities you have when using QVariant/Q_PROPERTY are not
> available in QML. This is probably fixable, but I'm not sure it's understood
> by the people who know QML well enough to fix it.
>
>   QGuiApplication app(argc, argv);
>
>   QList<QUmlObject*> l;
>   QUmlObject *o1 = new QUmlObject;
>   Q_SET_OBJECT_NAME(o1);
>   l.push_back(o1);
>   QUmlObject *o2 = new QUmlObject;
>   Q_SET_OBJECT_NAME(o2);
>   l.push_back(o2);
>
>   QVariant v = QVariant::fromValue(l);
>
>   if (v.canConvert<QVariantList>()) {
>       QSequentialIterable seqIter = v.value<QSequentialIterable>();
>       qDebug() << seqIter.size();
>
>       foreach(const QVariant &item, seqIter) {
>         qDebug() << item;
>       }
>   }
>
>   QQmlEngine engine;
>   engine.rootContext()->setContextProperty("_objList", v);
>   QQmlComponent component(&engine);
>   component.setData("import QtQuick 2.0\nItem { Component.onCompleted :
> console.log(_objList), _objList.length() }", QUrl());
>   component.create();
>
>
> 2
> QVariant(QUmlObject*, QUmlObject(0xa05920, name = "o1") )
> QVariant(QUmlObject*, QUmlObject(0xa11190, name = "o2") )
> QVariant(QList<QUmlObject*>)
> <Unknown File>: TypeError: Object [object Object] has no method 'length'
>
>

Well, I'm directly registering all required data converted to
QVariantData by now.
I'll try to investigate further in the beginning of July.

Thanks Stephen and Allan,

>
>
> Thanks,
>
> --
> Stephen Kelly <stephen.kelly at kdab.com> | Software Engineer
> KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company
> www.kdab.com || Germany +49-30-521325470 || Sweden (HQ) +46-563-540090
> KDAB - Qt Experts - Platform-Independent Software Solutions
>
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