[PyQt] converting old signal/slot to new signal/slot

[Florian Bruhin]

> It looks as if you are trying to have your signal not just exist but pass a
> parameter? The syntax for that in pyQtSignal is a bit obscure and I'm not
> comfortable with it so maybe somebody else can write about that.

It's quite simple, IMHO (at least as you don't need overloaded
signals):

    class myWidget( QWidget ):
        databaseChanged = pyqtSignal(str)

    [...]

    # self.react_to_db is a callable taking one argument.
    self.databaseChanged.connect( self.react_to_db )

    [...]

    if database_has_changed :
        # database_name has to be a string
        self.databaseChanged.emit(database_name)

(also, note that it's pyqtSignal, not pyQtSignal)

Florian

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