[Qt-interest] signals and slots....revisited...

[Arnold Krille]

On Monday 14 March 2011 20:17:16 K. Frank wrote:
> On Mon, Mar 14, 2011 at 4:47 AM, Arnold Krille <arnold at arnoldarts.de> wrote:
> > On Sunday 13 March 2011 19:00:34 sarvesh saran wrote:
> >> this is what i know (correct me if i am wrong)
> >>    1. slots are like ordinary member functions.however they can be
> >> called via signals irrespective of their access specifier.
> > Yes, slots are ordinary function, no, 'calling' them from signals can not
> > invalidate access specifiers.
> 
> I think that Sarvesh is right about signals bypassing the access
> specifiers of slots.  From:
> 
>    http://doc.qt.nokia.com/latest/signalsandslots.html
> 
> Since slots are normal member functions, they follow the normal C++
> rules when called directly. However, as slots, they can be invoked by
> any component, regardless of its access level, via a signal-slot
> connection. This means that a signal emitted from an instance of an
> arbitrary class can cause a private slot to be invoked in an instance
> of an unrelated class.
> 
> (I've never actually tried using a private slot, though.)

I am under the impression that you can only connect to slots you "see", so 
from the outside of the object, only the public slots can be used for 
connections. But I might be wrong…

Have fun,

Arnold
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