[Qt-interest] how to create custom signal and slot?

[Murphy, Sean M.]

> I have a class called RenderArea that extend QWidget and a class
called
> Rectangle that extend QObject. An object of type REctangle is created
> into the RenderArea object. Now....

Is there a reason that you are using two classes to do this?  It seems
like you could just have a Rectangle class that inherits from QWidget,
and skip the whole RenderArea class.

Sean