Re: Q_OBJECT in implementation file

["Fanda Vacek"]

thank you very much

Fanda

On Tue, 25 Jul 2006 17:41:38 +0200, Volker Hilsheimer <unwatched@xxxxxxx>  
wrote:

> "Fanda Vacek" <fanda.vacek@xxxxxxxx> wrote in message
> news:op.tc83fecjasg76k@xxxxxxxxxxxxxxxxxxxxxxxx
> > The QT4 documnetation does not tell a much about (QT3 doc does). I've
> > found only this in a moc chapter.
> >
> > For Q_OBJECT class declarations in implementation (.cpp) files, we
> > suggest  a makefile rule like this:
> >     foo.o: foo.moc
> >
> >     foo.moc: foo.cpp
> >             moc $(DEFINES) $(INCPATH) -i $< -o $@
> >
> > This guarantees that make will run the moc before it compiles foo.cpp.
> > You  can then put
> >     #include "foo.moc"
> >
> > at the end of foo.cpp, where all the classes declared in that file are
> > fully known.
> >
> >
> > After some playing and inspecting QT4 sources, I've found that I have to
> > include 2 files 'sourcename.moc' and 'moc_sourcename.cpp' at the end of
> > 'sourcename.cpp', but I still do not know why.
> >
> > Fanda
>
> You only have to #include the .moc file. The moc_*.cpp file can be
> compiled as a separate compilation unit, where as the .moc file cannot
> (the declaration of the class that the .moc file implements is not
> available).
>
> This is really all the same as in Qt 3.
>
> Volker



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