QML and Qt Quick

currentItem was not initialized

[quote author="chetankjain" date="1283405899"]not sure eraseRect can help here, you will have to repaint that rect from the original image, there may be accuracy issue as tskd has already tried[/quote] Right, good point. I was assuming the image was just a plain white fill. Thanks for the clarification. Michael

I agree with you guys... My main objective is to build apps in C++ using QML as visual layer and it works pretty well yet. But especially the singal or method interface between both is a bit difficult. So I would recommend it when you provide some more advanced tutorials in this topic. "Tips and tricks for making your QML app fast" sounds interesting too.

mario, yeah, I've uploaded this example to our lug server and you can download it "here":http://dl.yarlug.org/devel/Qt/qmlTreeModel.tar.gz .

whenever that data in the model changes make sure to call dataChanged() in the model.This will update the listView.

Hi, If these things are working correctly with other (e.g. webkit) xmlhttprequest implementations, then it is likely a bug in the QML implementation. Is it possible to provide an example or specific instructions to reproduce in the "bugtracker":http://bugreports.qt.nokia.com, so we can further track this down?

It's unlikely that it will appear in 4.7.0 at this point -- most likely 4.7.1 .

Hmm, I see. Thank you very much

There is also an associated "blog post":http://labs.trolltech.com/blogs/2010/08/10/qml3d-demo/ available on Qt Labs.

After reading the documentation again, I figured out that it should be the decoration role and not the display role for the gif to render.

In qdeclarativeitemsmodule.cpp, QAction is registered as @qmlRegisterType<QAction>();@ This type of registration does not make the class available for instantion in QML as an element. There are (at least) two pieces missing: QAction doesn't have a default constructor (see requirement "here":http://doc.qt.nokia.com/4.7-snapshot/qml-extending.html#adding-types) registration would need to be done via qmlRegisterType<QAction>("Qt",4,7,"Action"); One option might be for you to subclass QAction, provide a default constructor, and then register the type yourself, in a QML plugin. e.g. @qmlRegisterType<QAction>("MyComponents",1,0,"Action");@ and then @import Qt 4.7 import MyComponents 1.0 as Extras Item { Extras.Action { ... } } @ Regards, Michael

@mario, this is a while out in the future, but check out "http://labs.trolltech.com/blogs/2010/05/18/a-qt-scenegraph/":http://labs.trolltech.com/blogs/2010/05/18/a-qt-scenegraph/

I don't think the model above can be done, but even it were possible it's not really a good fit for how QML was designed, and I think you'll lose a lot (if not all) of the advantages of QML in trying to develop this way (for example object.property = foo.bar in javascript performs an assignment, and doesn't establish a binding). That said, you should still be able to code application logic in script -- see for example the samegame or calculator demos in which all of the logic is implemented in script. The script will need to be coded in a "QML friendly" way though; for example you'll need to use the "dynamic object management":http://doc.qt.nokia.com/4.7-snapshot/qdeclarativedynamicobjects.html functionality provided by QML.

[quote author="mario" date="1280820453"]@mbasser: What version of Qt are you using? I can't make it work on the beta 1 release. Well, maybe it's time to update to beta 2 anyway. [/quote] I'm using HEAD of the qt-qml staging branch. contentItem was introduced in change 9d6ccfea89ae99b747f70ece71185868f189d0f9 (June 24) -- I'm not sure if it is in beta2; if not it will definitely be in the next release candidate. Regards, Michael

That's great! Thanks for both.

There is a special factory QDeclarativeNetworkAccessManagerFactory to create a network access manager that should be used when accessing the network from QML. The manager created is then made known to the declarative engine by QDeclarativeEngine::setNetworkAccessManagerFactory(), as PixelQ stated already.

[quote author="aviral" date="1280731394"]how about trying on getting the selected item in list view and then selectedItem->setSelection() for required operation.[/quote] But I don't think I can do that in QML?

Hi, The "Exposing Data" section of "http://doc.qt.nokia.com/4.7-snapshot/qtbinding.html":http://doc.qt.nokia.com/4.7-snapshot/qtbinding.html gives an explanation of several recommended ways of passing data between C++ and QML. Regards, Michael

Oh thanks the "QT += declarative" statement was missing in my .pro file. I know this is a greenhorn mistake but sometime I'll get even this ; )

Ok thank you thats what I'm searching for.