I'm using qmlRegisterType now. I have problems, because two QML objects in different QML files it is two different objects in C++. I registered as type class that have static object of Engine, but now I have butthurt with it (I need retranslate all signals, getters and setters)
2013/9/30 Michael Zanetti <michael.zane...@canonical.com> > On Monday 30 September 2013 12:05:03 Николай Шатохин wrote: > > Can I set only one object as context property that contains other objects > > (and this objects contain objects too) and get this deep objects in QML? > > > > For i.e. I have object of class Engine that has object of class Game, > Game > > contains object of Ship and Ship contains object of Reactor. So, I set > > object of Engine as context property and in QML write: > > > > engine.game.ship.reactor > > > > Can I use it? > > > Yes, given that "game" is a Q_PROPERTY() of "enigne", "ship" is a > Q_PROPERTY() > of "game" etc... > > Still, I recommend to register the type of the Engine instead of setting > it as > a context property. > > It's really just using qmlRegisterType() instead of setContextProperty(). > It's > not more or more complex code, but gives you better ways of structuring > your > QML code. > > > > > > > 2013/9/30 Николай Шатохин <n.shatok...@gmail.com> > > > > > I've already found this solution: > > > > http://qt-project.org/doc/qt-5.0/qtqml/qtqml-cppintegration-contextpropert > > > ies.html It helps. Thanks. > > > > > > > > > 2013/9/30 Michael Zanetti <michael.zane...@canonical.com> > > > > > >> On Sunday 29 September 2013 13:45:01 Vladimir M. wrote: > > >> > Sounds like a "context property" use case (you plain set a QObject > as a > > >> > context property for a view's root scope, w/o even registering the > > >> > > >> object's > > >> > > >> > type, and all its properties and invokables become available). > > >> > > >> I don't recommend using context properties. While they are useful for > > >> some > > >> cases, this one doesn't seem to be one of those. Using too many global > > >> context > > >> properties can make the code very ugly to work with. > > >> > > >> You probably want to create something like this: > > >> > > >> class ViewController: public QObject > > >> { > > >> > > >> Q_PROPERTY(QList<MyClass> viewObjects READ viewObjects NOTIFY > > >> > > >> viewObjectsChanged) > > >> ... > > >> QList<MyClass> viewObjects() const { > > >> > > >> return objectList; > > >> > > >> } > > >> ... > > >> }; > > >> > > >> qmlRegisterType<ViewController>(uri, 0, 1, "ViewController"); > > >> > > >> Then in QML you can do something like this: > > >> > > >> ViewController { > > >> > > >> id: viewController > > >> > > >> } > > >> > > >> Repeater { > > >> > > >> model: viewController.viewObjects > > >> MyView { > > >> > > >> property var viewObject: viewController.viewObjects[index] > > >> > > >> } > > >> > > >> } > > >> > > >> > > >> Note that if you want your code to adjust more flexible (i.e. the > > >> viewObjects > > >> change a lot), consider using a QAbstractListModel (or some other > model) > > >> instead of a QList. > > >> > > >> Hope this helps, > > >> Michael > > >> > > >> > On Sun, Sep 29, 2013 at 6:38 AM, Николай Шатохин > > >> > > >> <n.shatok...@gmail.com>wrote: > > >> > > Hello. > > >> > > > > >> > > When I create a class in C++, I can register it for QML and can > > >> > > create > > >> > > view for it. It's very convenient. But, if I need many objects of > the > > >> > > >> same > > >> > > >> > > type, and need to show few views on screen, I got problems. > > >> > > Is it possible to register QML type for object, not for class? > > >> > > If I change some object, I need to see only its view changed. > > >> > > > > >> > > Best regard, > > >> > > Nick > > >> > > > > >> > > -- > > >> > > Mailing list: https://launchpad.net/~ubuntu-phone > > >> > > Post to : ubuntu-phone@lists.launchpad.net > > >> > > Unsubscribe : https://launchpad.net/~ubuntu-phone > > >> > > More help : https://help.launchpad.net/ListHelp > >
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