The same code works under Windows and fails under GNU/Linux

[jerome.bouat]

It seems to be an OpenGL issue but the error message I reported is far from that.

I'm investigating.

[jerome.bouat]

Just a Qt newbie question : I assume that all calls like below should be located into header files only and not cpp files :
@QObject::connect(scrollBar, SIGNAL(valueChanged(int)), label, SLOT(setNum(int)));@
?

Or could we possibly use this call into cpp files by including the right Qt file ?

[goetz]

It's an ordinary call of a static method. You put it into regular method bodies. That happens mostly in the .cpp files, but can be put into headers too.

[andre]

What's more, in most cases the right file is already included when you call this: the header of either of the objects you want to connect. If you find that you can not use the connect call: it is to be found in the QObject header.

[jerome.bouat]

I assume the "emit" keyword can be used in cpp files ?

[andre]

Perhaps you should work through one of the basic Qt tutorials. This is all explained very well in the documentation, there is even a section called "Signals & Slots" that explains in detail how this all works.