[Paraview] How to know that the filter was applied?

[Artem Bodrin]

Hello, Utkarsh

Yes, connecting to that signal might do the trick. 
Thank you very much for a tip :-)

> 26 марта 2018 г., в 17:14, Utkarsh Ayachit <utkarsh.ayachit at kitware.com> написал(а):
> 
> There's no such thing as "already applied", since even an already
> applied filter may be re-executed if a filter downstream makes a
> different request. Whenever a filter is executed, however,
> `pqPipelineSource::dataUpdated` signal is fired. You can look at the
> implementation of this signal to see that it's connected to
> `vtkCommand::DataUpdateEvent` event fired by the vtkSMSourceProxy.
> 
> Hopefully that helps.
> 
> Utkarsh
>