[PySide] What can be returned from a slot?

[Aaron Richiger]

The reason for the slot declaration of rowCount() is very simple :-) I 
use it in the view.qml (see the line: "helloText.rotation = 
con.get_model().rowCount()")! Calling rowCount() without the slot 
declaration from qml would fail. And no, it is not generally helpful, I 
would even say, that the opposite (declare only as many slots as really 
necessary) is the better solution because you get cleaner code and a 
narrower (=simpler) interface to the qml part.
Aaron

Am 13.01.2013 14:40, schrieb Yosef Meller:
>
> On Sunday 13 January 2013 14:32:10 Aaron Richiger wrote:
>
> > I think, this question is related to an earlier one from me... Anatoly
>
> > then told me the truth about lifetimes of QObjects that are created in
>
> > methods without any parent reference. They won't survive such a method
>
> > call as you try to do. By giving your model a parent reference that
>
> > survives the method call, the model will be available as well after the
>
> > return statement. The following code also shows, that the "QVariant"
>
> > trick is not necessary, but setting the result type to QObject is
>
> > enough. I hope this helps...
>
> You're right, QVariant isn't necessary, only parenting. It's not very 
> significant though as it only appears in the slot declaration.
>
> BTW, I see in your code that the model's rowCount method is declared 
> as a slot. What is the value in that? Does anything use this? I'm sure 
> it's optional because it works without it, but is it generally helpful 
> to declare it a slot anyway?
>
> Yosef.
>
>
>
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