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 -- 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
