Hi Alejandro Exojo, > -----Ursprüngliche Nachricht----- > Von: interest-bounces+christoph.petzold=hasomed...@qt-project.org > [mailto:interest-bounces+christoph.petzold=hasomed...@qt-project.org] > Im Auftrag von Alejandro Exojo > Gesendet: Samstag, 31. Januar 2015 16:11 > An: interest@qt-project.org > Betreff: Re: [Interest] [QML] Different behaviour between QML Scene > and QQmlApplicationEngine when using getContext("2d") > > El Thursday 29 January 2015, Christoph Petzold escribió: > > qrc:/NotWorkingRectangle.qml:7:5: QML Canvas: Unable to use > > getContext() at this time, please wait for available: true > (...) > > > NotWorkingRectangle.qml: > > ----------------------------------- > > import QtQuick 2.3 > > import QtQuick.Controls 1.2 > > Rectangle { > > anchors.fill: parent > > Canvas { > > property var ctx: getContext("2d") > (...) > > > In my real world component i have lots of painting functions and i > > do not want to pass the ctx element every time i want to use it. I > > also do not want to call getContext("2d") locally. I know it returns > > the same Object every next call but it is just code i would like to spare. > > There are some things that I might try: > > Does it change if you set the property in Component.onCompleted? Or > better yet, onAvailableChanged? After all is what the warning suggests.
Yes, both solutions are working fine for me. > > Note that your cpp file uses QQmlApplicationEngine, while qmlscene > uses a QQuickView IIRC. It might be that some initialization is done > earlier with the latter. > > Also, note that the canvas element already has a "context" property, > so you should have access to it anyway. I don't understand why you > want the custom "ctx" one. This is a really good point. I just did not know this. Thank you very much for you're help! > > -- > Alex (a.k.a. suy) | GPG ID 0x0B8B0BC2 > http://barnacity.net/ | http://disperso.net > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > > !DSPAM:1879,54ccf0a0267601779215299! > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
