[QGIS-Developer] Signal/slots in Processing scripts/algorithms

[Nyall Dawson]

On Fri, 20 Jul 2018 at 22:54, matteo <matteo.ghetta at gmail.com> wrote:
>
> Hi devs,
>
> is there a way to update a widget (e.g. setting a ComboBox as not
> enabled) depending on another widget within a Processing script?
>
> Something like:
>
> if val == 'whatever':
>   self.processingComboBox.setEnabled(False)

Not really - Processing doesn't currently have any support for
dependencies amongst parameters. You could maybe hack around this by
directly accessing widgets, but that wouldn't be version safe and
would be quite fragile.

The "canonical" way to handle this currently is to throw an error when
the algorithm is executed if the combination of parameters does not
make sense.

Nyall


>
>
> Thanks for all the hints
>
> Cheers
>
> Matteo
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