[Qt-interest] QVariant and user defined types

[Thiago Macieira]

Em Terça-feira 01 Junho 2010, às 13:52:07, Justus Best escreveu:
> Hi,
> 
> I currenty stuck a little while trying to add some of my classes to
> QVariant.
> My problem is that I can't find a way to put my Types in an enum and use
> them in a switch case with QVariant::userType().
> I tried with an enum like :
> enum MyTypes { Type1 = QVariant::UserType, Type2, Type3,  Type4, Type5 };
> But this doesn't correspond with the TypeIds I get if I call
> QVariant::userType().
> 
> So is there any possibility to use QVariant with user definded types in
> a switch statment ?

You have to register the metatype with a call to qRegisterMetaType first. You 
shouldn't assign your own numbers. Most applications have user-defined 
metatypes registered, so there's a huge risk of clashing if you do it the way 
you wrote above.

QVariant::type() will return UserType if it's a user type. However, 
QVariant::userType() returns the actual ID.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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