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Create a global object

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  • I Offline
    I Offline
    ivan
    wrote on last edited by
    #4

    Sorry, didn't realize you are talking about scripting. Haven't played with QML that much, bit if things are inherited from the QtScript module, it should go something like this:

    @engine.globalObject().setProperty("myObject", engine.newQObject(object));@

    After that, your object will be available to qtscript.

    As for making it pluggable with both c++ and js, I can't really help. (I could think of a dirty way to achieve it, but IMO it is better to wait for our friendly Trolls to tell us the proper way)

    Ivan Čukić | ivan.cukic(at)kde.org | KDE e.V.
    Qt Ambassador (from the old Nokia days)

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    • Y Offline
      Y Offline
      yan_
      wrote on last edited by
      #5

      Thanks.

      They do it in Qt Declarative code (QDeclarativeScriptEngine constructor in QDeclarativeEngine code)

      I've an access to QDeclarativeEngine which use a QScriptEngine (internaly) on plugin init function.
      But i don't find how to access to a QScriptEngine.

      "QExtend":http://www.developpez.net/forums/d906429/c-cpp/bibliotheques/qt/naissance-projet-qextend/
      "QEXtend Video":http://www.youtube.com/user/QEx...

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      • M Offline
        M Offline
        mbrasser
        wrote on last edited by
        #6

        You could try using setContextProperty() on the root context of the engine -- this will effectively add the object as a context property that is available to all the elements in the engine. From a plugin, you can do so inside the "initializeEngine()":http://doc.trolltech.com/main-snapshot/qdeclarativeextensionplugin.html#initializeEngine function.

        I believe there are plans to look at this more for a future release, so plugins can easily add "namespaces" like the Qt object with functions, enum values, etc.

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        • Y Offline
          Y Offline
          yan_
          wrote on last edited by
          #7

          With this method, how create QScriptValue with newXXXX function ?
          "http://doc.qt.nokia.com/4.7-snapshot/qscriptengine.html":http://doc.qt.nokia.com/4.7-snapshot/qscriptengine.html

          Another solution that i will test, it's create a component with QDeclarativeComponent
          "http://doc.qt.nokia.com/4.7-snapshot/qdeclarativecomponent.html":http://doc.qt.nokia.com/4.7-snapshot/qdeclarativecomponent.html

          Make @import "file.js" as myObject@ equivalent in qmldir file could be interesting.

          [edit: fixed hyperlink / $chetakjain ]

          "QExtend":http://www.developpez.net/forums/d906429/c-cpp/bibliotheques/qt/naissance-projet-qextend/
          "QEXtend Video":http://www.youtube.com/user/QEx...

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          • ? This user is from outside of this forum
            ? This user is from outside of this forum
            Guest
            wrote on last edited by
            #8

            hi yan, you could also use the link feature for hyperlinks

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            • Y Offline
              Y Offline
              yan_
              wrote on last edited by
              #9

              [quote author="chetankjain" date="1283761818"]hi yan, you could also use the link feature for hyperlinks[/quote]
              Sorry. I don't see this forum don't make auto-linked.

              "QExtend":http://www.developpez.net/forums/d906429/c-cpp/bibliotheques/qt/naissance-projet-qextend/
              "QEXtend Video":http://www.youtube.com/user/QEx...

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              • ? This user is from outside of this forum
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                Guest
                wrote on last edited by
                #10

                yan wrote:

                bq. Sorry. I don’t see this forum don’t make auto-linked.

                That I believe is in the roadmap ... :)

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                • M Offline
                  M Offline
                  mbrasser
                  wrote on last edited by
                  #11

                  [quote author="yan_" date="1283758523"]With this method, how create QScriptValue with newXXXX function ?[/quote]

                  With the setContextProperty() approach, you would use a QObject with slots or Q_INVOKABLEs for your "global" object, rather than a QScriptValue. The Minehunt demo shows this approach (adds a MinehuntGame object in the root context).

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                  • Y Offline
                    Y Offline
                    yan_
                    wrote on last edited by
                    #12

                    [quote author="mbrasser" date="1283814387"]With the setContextProperty() approach, you would use a QObject with slots or Q_INVOKABLEs for your "global" object, rather than a QScriptValue. The Minehunt demo shows this approach (adds a MinehuntGame object in the root context).[/quote]
                    Thanks.
                    I've ever test it and it's work perfectly ^^

                    I find a solution for JS code :D
                    1- create a qml file wich define function on the root element (I use QtObject)
                    2- in initializeEngine(), use a"QDeclarativeComponent ":http://doc.qt.nokia.com/4.7-snapshot/qdeclarativecomponent.html.
                    3- set qml file path or use setData
                    4- use create to make a QObject
                    5- add this QObject with setContextProperty

                    Like QDeclarativeComponent use qml file, i think it's so possible to mix JS and C++ code

                    "QExtend":http://www.developpez.net/forums/d906429/c-cpp/bibliotheques/qt/naissance-projet-qextend/
                    "QEXtend Video":http://www.youtube.com/user/QEx...

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                    • J Offline
                      J Offline
                      johnlamericain
                      wrote on last edited by
                      #13

                      It's really impressive, thanks for that !

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