[SOLVED] Several Qt problem on BB Qt



  • Hi,
    I'm trying a very simple app, there are so many problems!

    1. import QtMultimediaKit 1.1 (causes the app to show white screen without any objects on it)
    2. I'm not able to use a simple javascript function from within qml file (using import "file.js" as JsUtil)
    3. There is a big problem with rotation, autorotation and lock Qt instruction that cause the app to crash immediately

    Actually I cannot create a landscape background app (even I change the resolution of main rectangle, it doesn't change the image aspect and so on...)
    It's very impossible to port an app on BB isn't it?



  • [quote author="AlterX" date="1356805238"]

    1. There is a big problem with rotation, autorotation and lock Qt instruction that cause the app to crash immediately
      [/quote]

    Could you please specify which BlackBerry OS do you target how to you test your app? PlayBook OS or BlackBerry 10? Real device or simulator?



  • I am using a dev alpha B with tbe last os update and last ndk...currently i just deploy the app and launch it on the device (see my last thrad on ssh rejection).



    1. Sounds like it can't find the QtMultimediaKit libraries. I haven't tried that myself, I'm not even sure if these are supposed to be available for BB10
    2. Any errors? That works for me.
    3. See http://qt-project.org/forums/viewthread/22712/ . It will apparently be fixed in the next ndk version. Previous version should also work, or disable rotation for now.
      If you're using the qt creator qml viewer template, you can use:
      viewer.setOrientation(QmlApplicationViewer::ScreenOrientationLockLandscape);
      to lock the app in landscape.


  • Any news about QtMultimediaKit libraries for BB10?



  • QtMultimediaKit should be there. However, not everything is implemented yet (like the camera).

    JavaScript functions should work without any problems. Is there any error message?



  • I don't know...I've given it up for now...I'm using cascades for this simple project (just qml, javascript and sounds using multimediakit).
    It was wonder if I could use qtcreator with just few port hours...but it wasn't!
    Anyway I will give a try to it...
    Does Someone know if NumberAnimation and PropertyAnimation are supported?



  • bq. Does Someone know if NumberAnimation and PropertyAnimation are supported?

    Yes, of course.

    Setting up the Qt Creator with BB10 canbe somewhat anoying, still. But it will improve in the next version.



  • I've just tried again to load the main qml onto device without success!
    the form uses qtmultimediakit and a Rectangle in which I set a background image (get from resource).
    It shows me just a white form (locking orientation on the device; if not it shows half white image and then it crash)!



  • I suspect you either did not package the asset (qml file) correctly or, you specify the wrong path.
    Are you using qrc or are you deploying your files?



  • [quote author="Bomb3rman" date="1357134484"]I suspect you either did not package the asset (qml file) correctly or, you specify the wrong path.
    Are you using qrc or are you deploying your files?[/quote]

    I have used both because of I've two versions: one symbian that deploys all files and an other one for n950 that uses resources. I think the symbian version worked for me (showing background but always in portrait mode).



  • So are you now using qrc or assets now? Is there an error message from the program?



  • [quote author="Bomb3rman" date="1357140516"]So are you now using qrc or assets now? Is there an error message from the program?[/quote]

    currently I'm using qrc for images and sounds and I haven't any error from Qtcreator (but if see another my post, I'm not able to launch app directly from within qtcreator, so I suppose I cannot view normal output)



  • What about the qml files...how are these packaged?



  • They are packaged in the normal way...just added in the project file



  • AlterX, bar-descriptor.xml file is important as well. Adding files into pro file is not enough. Look how sample app is done.

    White rectangle means that something has failed to load or there is error

    Choose one orientation in bar-descriptor.xml for now. There is bug (some other recent thread) that prevents orientation change - it is fixed and will be available with next NDK release.



  • I'm creating an app from scratch...ok I'm able to show a background in portrait mode, but when I just put
    @
    import QtMultimediaKit 1.1
    @

    The screen returns to be white (doesn't matter if I put multimedia in .pro file)



  • QtMultimediaKit should be there. However, not everything is implemented yet (like the camera).

    I am getting "module "QtMultimediaKit" is not installed" error.



  • I am getting “module “QtMultimediaKit” is not installed” error.

    Are you using the simulator or a dev alpha?
    Did you set a qml import path in the bar descriptor file?



  • [quote author="Bomb3rman" date="1357823744"]
    Are you using the simulator or a dev alpha?
    Did you set a qml import path in the bar descriptor file?[/quote]

    I'm using a alpha dev B. What do you mean with set import in bar descriptor?
    I've set qml dir in bar descriptor.



  • Are you having sth like this in the bar descriptor? If the answer is yes, how does this line of code look like? And if no, can you add this line and try it again?

    <env var="QML_IMPORT_PATH" value="/usr/lib/qt4/imports"/>


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