template class that inherits from QObject

[canellas]

Hi,

I wrote this class

template <typename t_figure>
class drawing : public QObject, public t_figure  {
     Q_OBJECT
...

And when I try to compile it, I get :

mainwindow.o:-1: error: referência indefinida para `drawing<QGraphicsRectItem>::metaObject() const'

Where "referência indefinida" means "undefined reference".

Can I create such a class in Qt?

Thanks

[raven-worx]

@canellas
AFAIK Q_OBJECT macro can't be used in templated classes.

[sierdzio]

Indeed. QObjects classes cannot be templated. There are some workarounds for that (example), or you can use Qt modifications (Woboq's moc-less Qt or Coperspice) where it is allowed.

[canellas]

Thanks all for your contribution