[Qt-jambi-interest] Error on connecting QCheckBox.toggled with QDialog.setVisible(boolean)

[Eskil Abrahamsen Blomfeldt]

Curt Nowak wrote:
> I'm trying to toggle the visibility of a QDialog 'dialog' when a QCheckBox 'checkBox' is toggled.
> So I thought
>  
> <code>
> checkBox.toggled.connect(dialog, "setVisible(boolean)");
> </code>
>  
> would do the trick. But instead I get a com.trolltech.qt.QNoSuchSlotException.
> Misteriously 
>  
> <code>
> checkBox.toggled.connect(dialog, "setEnabled(boolean)");
> </code>
>  
> works fine. What's up with that?
>   

Hi, Curt.

This is a bug in the Qt Jambi generator. If the Generator sees a 
function in a QObject subclass (such as QDialog) which is not set as a 
slot in C++, and thus not intended to be a slot in the API, then it will 
mark it with a @QtBlockedSlot annotation in Java. This means the method 
will not be connectable and will not turn up in lists over available 
slots in Designer etc. The bug your case has revealed is that when the 
slot is virtual and is reimplemented in a subclass, then the Generator 
will not realize that the new implementation is also considered a slot 
in the original API.

QDialog reimplements setVisible() which causes this problem to occur in 
your case.

Thanks for the report!

-- Eskil