[Interest] using a custom class as parameter of, signal/slot, used in QML

Sylvain Pointeau sylvain.pointeau at gmail.com
Thu Mar 21 15:52:46 CET 2019

Do you mean a copy / assignment of a QVariantMap to their classes?
In the meantime, I also provided the answer that Q_GADGET was working fine.

On Thu, Mar 21, 2019 at 1:21 PM Roland Hughes <roland at logikalsolutions.com>

> One can define their own copy constructors and assignment operators for
> their own classes.
> On 3/1/19 11:52 AM, interest-request at qt-project.org wrote:
> > Since signal are not sync all the time but can be async, the argument
> need to be copiable to allow this. So you need to be able to copy the
> arguments on the signals. Therefore the QObject is not copiable, they
> cannot be passed as arguments directly, you need a pointer. The ownership
> and lifetime of that object is up to you, but you need it to live until all
> handler have finish processing the signal (this can be longer then the
> signal emit for queued connection).
> >
> > If you can easily copy the structure you probably can
> serialize/deserialize it or put it into a QVariant, QVariantList or
> QVariantMap. That would be copiable.
> --
> Roland Hughes, President
> Logikal Solutions
> (630)-205-1593  (cell)
> http://www.theminimumyouneedtoknow.com
> http://www.infiniteexposure.net
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