Hello Again, I just saw on stackoverflow that it is possible with a Q_GADGET, I tried and it works as expected. That's good, seems it appeared in Qt 5.5. (Just missing now the auto completion from Qt Creator on the QML side for Q_GADGET objects)
I honestly tried this one as well without success, I just found out it is because I did qmlRegisterType on this type which is obviously incorrect I recognise it I learn the hard way - but is there other ways? :-) https://stackoverflow.com/questions/31433260/passing-q-gadget-as-signal-parameter-from-c-to-qml Best regards, Sylvain On Fri, Mar 1, 2019 at 11:00 PM Jérôme Godbout <godbo...@amotus.ca> wrote: > You can also give CBor implementation a look,maybe it could fit your bill > too: > > > > https://doc.qt.io/qt-5/qcbormap.html > > > > > > *From:* Sylvain Pointeau <sylvain.point...@gmail.com> > *Sent:* March 1, 2019 4:46 PM > *To:* Jérôme Godbout <godbo...@amotus.ca> > *Cc:* Qt Project <interest@qt-project.org> > *Subject:* Re: [Interest] using a custom class as parameter of > signal/slot, used in QML > > > > On Fri, Mar 1, 2019 at 10:29 PM Jérôme Godbout <godbo...@amotus.ca> wrote: > > Why is the struct deleted one the signal is finished? You create a > structure only for the signal? it’s not an object or data that will outlive > that call in the end? If so, you really need to make a copiable > representation of the struct. > > > > Yes it is just an object created for the time of the signal, to avoid > having 5 parameters to my signal. > > > > > > What kind of data live into your struct? are they all basic type or > pointer? or do you have QObject into it? > > QVariantMap seem like an easy way out. > > > > it is (for now) just integers, I just tried QVariantMap (just after my > previous email), I find it good enough, I will stay with this I think. > > > > JSON serialization or even better QDataStream (which is really fast > compare to JSON) could help you do it. You could do an operator<<() and > operator>>() with QDataStream on your struct to do it. QByteArray are > copiable. > > > > If you can provide more information about your struct data that could help. > > > > it is just basic data for now. > > > > But I would really wish that Qt could do that for us so I can just keep on > using my structure. > > >
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