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

[Reaves, Timothy]

Several of these things are incorrect, at least from an interaction
perspective.  However, I'm not the person to correct you, as I may misstate
something at the implementation level.

I'd susggest spending more time with the Qt documentation on signals &
slots; it's really very good.

On Sun, Mar 13, 2011 at 2:00 PM, sarvesh saran
<aquarian.thunder at gmail.com>wrote:

> Hi,
>
> I have been a Qt programmer for quite some time now and i understand most
> of the general features of Qt. I am still confused  about how signals and
> slots work...
>
> 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.
>    2. emit is a macro that expands to nothing.
>    3. when you write emit mysignal() you are just calling a function
>    called mysignal which has been implemented in the generated moc file.
>    4. for every object (instantiated from a class containing Q_OBJECT
>    macro and inheriting QObject) an addition meta object is instantiated ?
>    5. QT stores the names slots and signals of an object in its  meta
>    object? in what format.....<name,function pointer> ?
>    6. connections between objects are made at runtime...how?? not sure how
>    and where a slot is searched for....
>    7. but the arguments in the connect call are matched at compile time?
>    8. while connecting, only the arguments of the slot is
>    checked...surplus arguments are discarded.
>    9. SIGNAL and SLOT are macros......not sure what their purpose is....
>
> i tried to look into the generated moc file but things are still murky..any
> help will be greatly appreciated.
>
> thanks,
> Sarvesh
>
>
>
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