[Paraview-developers] Disabling a menu item in Paraview GUI

[Joachim Pouderoux]

Prashant,

Sure. You could listen for object builder events (see signals section of
pqObjectBuilder.h):

  QObject::connect(pqApplicationCore::instance()->getObjectBuilder(),
    SIGNAL(destroying(pqPipelineSource*)),
    this,
    SLOT(onSourceRemoved(pqPipelineSource*)));


*Joachim Pouderoux*

*PhD, Technical Expert*
*Kitware SAS <http://www.kitware.fr>*


2015-12-08 15:48 GMT+01:00 Prashant V <prashant.v at quest-global.com>:

> Hi Joachim,
>
> Thanks for sharing this snippet. This is really helpful. I have one more
> question further.
> In my case, how should I access object of my menu when user clicks on
> 'Delete' button. I don't want to change Paraview source code where 'Delete'
> callback slot is implemented.
>
> Regards,
> Prashant
> ------------------------------
> *From:* Joachim Pouderoux [joachim.pouderoux at kitware.com]
> *Sent:* Tuesday, December 08, 2015 4:36 PM
> *To:* Prashant V
> *Cc:* paraview-developers at paraview.org
> *Subject:* Re: [Paraview-developers] Disabling a menu item in Paraview GUI
>
> Prashant,
>
> I think you could track the number of objects available in the model,
> something like :
>
>   pqServerManagerModel* model =
>     pqApplicationCore::instance()->getServerManagerModel();
>   pqServer* server = pqApplicationCore::instance()->getActiveServer();
>   QList<pqPipelineSource*> sources =
> model->findItems<pqPipelineSource*>(server);
>   int numberOfPipelineSources = sources.size();
>   mymenu->setEnable(numberOfPipelineSources != 0);
>
> Best,
> Joachim
>
>
> *Joachim Pouderoux*
>
> *PhD, Technical Expert*
> *Kitware SAS <http://www.kitware.fr>*
>
>
> 2015-12-08 10:42 GMT+01:00 Prashant V <prashant.v at quest-global.com>:
>
>> Hello,
>>
>>
>>
>> I have added a menu item in Paraview GUI. I want to disable this menu
>> item when user deletes all objects from pipeline browser. What I want to
>> achieve is quite similar to enabling/disabling of Filter menu. Can anybody
>> please guide, how this can be done? Thanks.
>>
>>
>>
>> Regards,
>>
>> Prashant
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