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

[Prashant V]

Hi Joachim,

Now I want to do operations with my menu when user clicks on Apply button. Taking cue from this link (https://cmake.org/pipermail/paraview/2015-July/034476.html)
I tried to connect Apply button signal 'applied()' (defined in pqPropertiesPanel.h) with a slot defined in my menu class. My code snippet is:

QList<pqPropertiesPanel*> ppanels = pqCoreUtilities::mainWidget()->findChildren<pqPropertiesPanel*>();
  foreach (pqPropertiesPanel* ppanel, ppanels)
  {
    QObject::connect(ppanel, SIGNAL(applied()), myMenuObject, SLOT(onApplyClicked()));
  }

This code doesn't work because QList ppanels remains empty. How should I access pqPropertiesPanel object in my menu class? Thanks.

Regards,
Prashant
________________________________
From: Paraview-developers [paraview-developers-bounces at paraview.org] on behalf of Prashant V
Sent: Wednesday, December 09, 2015 1:34 PM
To: Joachim Pouderoux
Cc: paraview-developers at paraview.org
Subject: Re: [Paraview-developers] Disabling a menu item in Paraview GUI


Thanks Joachim. This works absolutely the way I wanted.



________________________________
From: Joachim Pouderoux [joachim.pouderoux at kitware.com]
Sent: Tuesday, December 08, 2015 8:23 PM
To: Prashant V
Cc: paraview-developers at paraview.org
Subject: Re: [Paraview-developers] Disabling a menu item in Paraview GUI

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<mailto: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<mailto:joachim.pouderoux at kitware.com>]
Sent: Tuesday, December 08, 2015 4:36 PM
To: Prashant V
Cc: paraview-developers at paraview.org<mailto: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<mailto: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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