Complete QtCreator project in attachment. I'm running it on QtCreator 2.7.0 and Qt 5.0.1, SUSE Linux 12.3.
On Fri, Apr 5, 2013 at 2:30 PM, Pritam Ghanghas <[email protected] > wrote: > can you send compilable code that reproduces this problem. I will try here. > ________________________________ > From: > [email protected][interest-bounces+pritam_ghanghas= > [email protected]] on behalf of Aekold Helbrass [ > [email protected]] > Sent: Friday, April 05, 2013 4:45 PM > To: Qt-interest Interest > Subject: Re: [Interest] QVariant cannot take custom type > > Ok, I've tried this one: > > QVariant var(QMetaType::QObjectStar, &item); > > > and it almost works. Pointer somehow gets crippled after using > QMetaProperty.write. When Item* is created originally - address is > 0x1b952fo. But into Holder it is written as 0x1b95480. > > Is is even possible? Maybe I'm constructing QMetaProperty not as > intended?... > > > On Fri, Apr 5, 2013 at 2:00 PM, Pritam Ghanghas < > [email protected]<mailto:[email protected]>> wrote: > use gdb and see where exactly it segfaults. That will give better pointers > than random guesses. > You can try posting backtrace here. > ________________________________ > From: [email protected]<mailto: > [email protected]> [interest-bounces+pritam_ghanghas= > [email protected]<mailto:[email protected]>] on behalf > of Aekold Helbrass [[email protected]<mailto:[email protected]>] > Sent: Friday, April 05, 2013 4:15 PM > To: Conti Manuele > Cc: Qt-interest Interest > Subject: Re: [Interest] QVariant cannot take custom type > > Thanx, that one was close, but still segfault: > > QSharedPointer<Item> pointer(item); > > QVariant var = QVariant::fromValue(pointer); > > list.append(var); > > > > On Fri, Apr 5, 2013 at 1:33 PM, Conti Manuele <[email protected]<mailto: > [email protected]><mailto:[email protected]<mailto:[email protected]>>> > wrote: > Hi All, > There is a problem in your code, actually I use this and work perfectly: > Q_DECLARE_METATYPE(QSharedPointer<QPlcServerSocket::QExternalCommand>) > qRegisterMetaType< QSharedPointer<QPlcServerSocket::QExternalCommand> >(); > > > Bye > > On 04/05/2013 12:27 PM, Samuel Gaist wrote: > > He explains how to handle QObject * so a pointer to QObject instance, > not a QObject instance. > > > > On 5 avr. 2013, at 12:22, Aekold Helbrass wrote: > > > >> So, it is absolutely impossible to use QObject-derived class with > QVariant? I'm storing QList of pointers already, and I want to write that > with QMetaProperty. The only thing that needs copy-constructor, in my > understanding, is qRegisterMetaType invocation. > >> > >> I even read an article where guy explains how to get other types than > one you're storing, so it looks like there is no problem in storing QObject > in QVariant, but for some reason it doesn't work for me: > >> > http://steveire.wordpress.com/2011/03/16/implementing-qvariantqmetatype-features-with-template-tricks/ > >> > >> > >> On Fri, Apr 5, 2013 at 12:44 PM, André Somers <[email protected] > <mailto:[email protected]><mailto:[email protected]<mailto: > [email protected]>>> wrote: > >> Op 5-4-2013 11:39, Sven Bergner schreef: > >>> Hello, > >>> you can use a custom type with QVariant by declaring it > >>> using Q_DECLARE_METATYPE ( Type ). > >>> Hope that helps. > >>> > >> It does not. That was already in the code posted in the opening post. As > >> noted by others, the issue lies with trying to use a QObject derived > >> class here. > >> > >> André > >> > >> -- > >> You like Qt? > >> I am looking for collegues to join me at i-Optics! > >> > >> _______________________________________________ > >> Interest mailing list > >> [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>> > >> http://lists.qt-project.org/mailman/listinfo/interest > >> > >> _______________________________________________ > >> Interest mailing list > >> [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>> > >> http://lists.qt-project.org/mailman/listinfo/interest > > _______________________________________________ > > Interest mailing list > > [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>> > > http://lists.qt-project.org/mailman/listinfo/interest > > > > _______________________________________________ > Interest mailing list > [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>> > http://lists.qt-project.org/mailman/listinfo/interest > > > **************** CAUTION - Disclaimer ***************** > This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended > solely > for the use of the addressee(s). If you are not the intended recipient, > please > notify the sender by e-mail and delete the original message. Further, you > are not > to copy, disclose, or distribute this e-mail or its contents to any other > person and > any such actions are unlawful. This e-mail may contain viruses. Infosys > has taken > every reasonable precaution to minimize this risk, but is not liable for > any damage > you may sustain as a result of any virus in this e-mail. You should carry > out your > own virus checks before opening the e-mail or attachment. Infosys reserves > the > right to monitor and review the content of all messages sent to or from > this e-mail > address. Messages sent to or from this e-mail address may be stored on the > Infosys e-mail system. > ***INFOSYS******** End of Disclaimer ********INFOSYS*** > >
qvariantConversions.tar.xz
Description: Binary data
_______________________________________________ Interest mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/interest
