[Paraview] New panel, widget update

Wed Aug 7 21:02:37 EDT 2013

Utkarsh, thanks for the input about the behavior.

> If you can point me to the code, I wouldn't mind taking a look. Also,
> should we be moving this reader/panel code into ParaView itself?

The code is available from (it's still an SVN project):
svn checkout svn://svn.code.sf.net/p/of-interfaces/code/trunk/vtkPOFFReader

I would be _very happy_ if you (or someone) integrate the code into
ParaView itself.

Takuya OSHIMA, Ph.D.
Faculty of Engineering, Niigata University
8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN

From: Utkarsh Ayachit <utkarsh.ayachit at kitware.com>
Subject: Re: [Paraview] New panel, widget update
Date: Wed, 7 Aug 2013 11:20:57 -0400

> Takuya,
> 
> You can still continue to do what you're doing. You can add a custom
> widget for some property that still listens to the dataUpdated() event
> from the pqPipelineSource corresponding to the reader's proxy.  But I
> don't think logic, as this this for adding text to views should be in
> the panel. It should be a separate component, e.g. the behaviors
> (http://www.paraview.org/ParaView3/Doc/Nightly/www/cxx-doc/group__Behaviors.html).
> That makes it possible to handle the cases where multiple views are
> created/added more gracefully than one could with the panel.
> 
> If you can point me to the code, I wouldn't mind taking a look. Also,
> should we be moving this reader/panel code into ParaView itself?
> 
> Utkarsh
> 
> On Sat, Aug 3, 2013 at 10:23 PM, Takuya OSHIMA
> <oshima at eng.niigata-u.ac.jp> wrote:
>> Hi Felipe, Utkarsh,
>>
>> I'm interested in this too because the custom panel of my reader (the
>> SourceForge version of the OpenFOAM reader) does a similar thing. In
>> my scenario I wanted to add some text actors on the 3D views outside of
>> the pipeline. The world coordinates of the actors are calculated by
>> the reader during update and the panel pulls the results after the
>> update. Then the panel instructs back the server to generate text
>> actors outside of the pipeline and to superimpose them on the 3D
>> views.
>>
>> I haven't tried the new panel architecture yet but in the old
>> architecture, I created a slot (named onDataUpdated()) in my custom
>> panel code and connected it to the dataUpdated() signal of the
>> corresponding pqPipelineSource of the reader proxy (not the
>> dataUpdated() of the pqProxyPanel). The methodology worked well for
>> the old architecture. I wonder if by any chance it also works for the
>> new one or not?
>>
>> Takuya OSHIMA, Ph.D.
>> Faculty of Engineering, Niigata University
>> 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
>>
>> From: Utkarsh Ayachit <utkarsh.ayachit at kitware.com>
>> Subject: Re: [Paraview] New panel, widget update
>> Date: Thu, 1 Aug 2013 14:21:45 -0400
>>
>>> The short answer is this is not possible. The properties panel is not
>>> really meant to show results produced by the filter/reader. You could
>>> add a "information panel" i.e. a new dock widget that shows all such
>>> relevant information ad then you can use custom information properties
>>> on the proxy for the reader to query the current value for f2, for
>>> example.
>>>
>>> We could extend the pqProxyWidget class to show widgets for
>>> information-only properties, but that too won't solve your problem
>>> since ParaView will not know when the information has changed.
>>> Currently, it will do that when the property on that proxy was changed
>>> and the user hit apply -- which is a good time to assume some of the
>>> information-properties may have changed.
>>>
>>> Sorry, I don't have a direct answer for you, but I hope that gives you
>>> some ideas.
>>>
>>> Utkarsh
>>>
>>> On Thu, Aug 1, 2013 at 8:43 AM, felipe.bordeu at ec-nantes.fr
>>> <felipe.bordeu at ec-nantes.fr> wrote:
>>>> Also, had I said before, my reader y capable of generate data based in the value of the slider. This value is send using a keyinformation downstream in the pipeline.  Then I have an optimizer fiter capable of setting automatically this value(sending a request upstream). I whould like the properties panel to be updated with the final valiue.
>>>>
>>>> Felipe
>>>> -----Message d'origine-----
>>>> De:Felipe Bordeu
>>>> Envoyé: 01/08/2013, 14:33
>>>> A: Felipe Bordeu Weldt
>>>> Sujet: RE: [Paraview] New panel, widget update
>>>>
>>>> -----Message d'origine-----
>>>> De:Felipe Bordeu Weldt
>>>> Envoyé: 30/07/2013, 21:23
>>>> A: paraview at paraview.org
>>>> Sujet: Re: [Paraview] New panel, widget update
>>>>
>>>>
>>>> Hi,
>>>>
>>>> the short story:
>>>>
>>>> In my custom reader select some values using some sliders. Then push
>>>> the Apply, at that moment, I (I mean the reader) read the file make
>>>> the calculations for the construction of a field and set the sliders
>>>> to the real final values calculated by the reader (so the user is
>>>> aware of with values are used).
>>>>
>>>> the long story:
>>>>
>>>> Ok, my solution can be written like this T(x,y,z,r,s,t) =
>>>> f1(x,y,z)*f2(r,s,t)   (this is a separation of variables). where f1 is
>>>> a nodalfield in a mesh on the x,y,z space, and f2 is a nodalfield in a
>>>> different mesh in the (r,s,t) space.
>>>> So my file holds 2 (or more) meshes with associated fields.
>>>> My field T (that lives in a 6 dimension space) cant be visualized in
>>>> ParaView (or any visualization tool). So my idea is to fix (r,s,t) so
>>>> the field T  becomes T(x,y,z,r0,s0,t0) = T(x,y,z) (this is a 3D field
>>>> and can be visualized in ParaView).
>>>>
>>>> In my custom reader I use 3 slider to select the values of r,s,t, and
>>>> then internally I search for the closest point in the mesh (to get the
>>>> value of f2). And with the older panel I used to update the slider so
>>>> the user can know the point that is used for the calculation.
>>>>
>>>> In this video you can see the reader in action http://www.youtube.com/watch?v=o6Vzww_cmhA#at
>>>> =26 (details in  http://rom.research-centrale-nantes.com/overview/)
>>>> but in this case I use the interpolation in the r,s,t space  so no
>>>> update is done.
>>>>
>>>>
>>>> It this clear enough?
>>>>
>>>> Felipe
>>>>
>>>>
>>>>
>>>>
>>>> Le 30 juil. 13 à 16:01, Utkarsh Ayachit a écrit :
>>>>
>>>>> Felipe,
>>>>>
>>>>> Can you elaborate on why you need to do this?
>>>>>
>>>>> Thanks
>>>>> Utkarsh
>>>>>
>>>>> On Tue, Jul 30, 2013 at 2:35 AM, Felipe Bordeu Weldt
>>>>> <felipe.bordeu at ec-nantes.fr> wrote:
>>>>>> Hello,
>>>>>>
>>>>>> In the old panel system, the pqProxyPanel  has a
>>>>>> updateInformationAndDomains() and the dataUpdated() to update the
>>>>>> panel AFTER the algorithm is executed.
>>>>>> How can I achieve this in the new panel architecture ??
>>>>>>
>>>>>> My new panel is a subclass of pqPropertyWidget.
>>>>>>
>>>>>> Felipe
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>>>
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