[Paraview] New panel, widget update

Sat Aug 3 22:23:01 EDT 2013

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
>>>> _______________________________________________
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> http://www.paraview.org/mailman/listinfo/paraview
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.paraview.org/mailman/listinfo/paraview
>>
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.paraview.org/mailman/listinfo/paraview
>>
> 