[Development] QVariant comparison in Qt6
thiago.macieira at intel.com
Wed Sep 23 21:12:52 CEST 2020
On Wednesday, 23 September 2020 06:59:16 PDT Milian Wolff wrote:
> > 1
> > 10
> > 11
> > 2
> > 3
> > 21
> > A few of the above are strings and the others are numbers. It should
> > always
> > lexicographically sort or use numeric/natural sorting.
> This wouldn't be an issue if you sort by the integral values instead.
And how do you sort these variants:
if you convert to integer, the string becomes 0, so it sorts first. If you
convert the integer to string, "1" sorts before "hello". Note that
QAbstractItemModelPrivate::isVariantLessThan returns false for BOTH orders:
isVariantLessThan(1, "hello") == false
isVariantLessThan("hello", 1) == false
> > > Maybe making QAbstractItemModelPrivate::isVariantLessThan public and
> > > clearly defining what it was would be good enough (i mean if it is good
> > > enough for QAbstractItemModel it could be enough for most of the other
> > > implementations).
> > That's a good idea.
And fix the case above.
Which in my mind involves converting to string if the two types aren't equal
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel DPG Cloud Engineering
More information about the Development