Qt ─ how to use enum as the QMimeData type/format

Marek Kochanowicz sirherrbatka at gmail.com
Mon Feb 3 16:19:49 GMT 2014

Dnia poniedziałek, 3 lutego 2014 17:01:31 Kevin Krammer pisze:
> On Monday, 2014-02-03, 16:43:39, Marek Kochanowicz wrote:
> > Dnia poniedziałek, 3 lutego 2014 16:24:08 Kevin Krammer pisze:
> > > Do we talk about an application internal drag&drop operation here?
> > > 
> > > In such a case the easiest case might be to store an identifier of some
> > > sort and let the drop recipient use that to do an look up for the actual
> > > object.
> > 
> > First of: thanks for the answer. I probably should consider going to the
> > KDE- devel but honestly, I forgot about it. ;-)
> > 
> > Yes, those are inner drag & drops, and are not meant to handled outside of
> > the application.
> > 
> > The approach you suggested  would work, but I would like to use type in
> > the
> > QMimeData and properly accept, just because this would provide user visual
> > feedback (cursor change to no-drop) if the drop will not be accepted.
> I didn't mean to imply that the only information you can send is the
> identifier :)
> But even with just the identifier your use case (selective drag/drop
> handling) is still possible. You just get the identifier, get the object
> and check the object's type.
> If for whatever reason you don't want to do the object lookup in e.g.
> dragMoveEvent, just use a different MIME type for each object type.
> Cheers,
> Kevin

I think I misunderstood you initially but now I see what do you mean. This 
appears to be a good solution, probably less complex, than attempt to create 
object with format corresponding to the data type.
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