[Paraview] [EXT] Re: More Customization of Python programmable Filter Panel

Dennis Conklin dennis_conklin at goodyear.com
Thu Sep 24 15:18:13 EDT 2015 

Cory,

I had just thought of this and tried it (successfully) about when your note came in.

I hate to quibble, but I would suggest that in the typeMap in the python_filter_generator.py vtkMultiBlockDataSet is listed as vtkMultiblockDataSet and I had to figure this out and use a small ‘b’ before it would work – so if you are going to publish this routine anywhere, you might want to edit that!

Thanks again – as soon as I figure out why it is grayed out on the Filter list I am going to test this thing out.

Dennis

From: Cory Quammen [mailto:cory.quammen at kitware.com]
Sent: Thursday, September 24, 2015 3:13 PM
To: Dennis Conklin <dennis_conklin at goodyear.com>
Cc: Paraview (paraview at paraview.org) <paraview at paraview.org>
Subject: Re: [EXT] Re: [Paraview] More Customization of Python programmable Filter Panel

Hi Dennis,

The converter evaluates your Python script and then uses some Python reflection features to extract the code in your RequestData function. But it does this only for the RequestData function (as well as a RequestInformation and RequestUpdateExtent functions, but these aren't always needed). The converter is simply ignoring your other functions.

To get around this, try defining your sub* functions as inner functions in RequestData(), e.g.,

Def RequestData():
   Def sub1:
      Do some stuff
      Return var

   Def sub2(var):
      Do some stuff
      Return newVar

   Def sub3(var):
      Do some stuff
      Return newVar

   X=sub1()
   Y=sub2(X)
   Z=sub3(Y)
   Do something with Z

Best regards,
Cory

On Thu, Sep 24, 2015 at 2:39 PM, Dennis Conklin <dennis_conklin at goodyear.com<mailto:dennis_conklin at goodyear.com>> wrote:
Cory,

I’m pretending to be a real programmer, so my Programmable Filter script looks something like this:

Def sub1:
   Do some stuff
   Return var

Def sub2(var):
   Do some stuff
   Return newVar

Def sub3(var):
   Do some stuff
   Return newVar

Def RequestData():
       X=sub1()
       Y=sub2(X)
       Z=sub3(Y)
      Do something with Z

Everything except RequestData gets lost – should I just manually break everything down and insert at the beginning of the default_values in StringVectorProperty, or is there some way to trick it into reading the entire script?

Thanks

Dennis

From: Cory Quammen [mailto:cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>]
Sent: Thursday, September 24, 2015 1:02 PM
To: Dennis Conklin <dennis_conklin at goodyear.com<mailto:dennis_conklin at goodyear.com>>
Cc: Paraview (paraview at paraview.org<mailto:paraview at paraview.org>) <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: Re: [EXT] Re: [Paraview] More Customization of Python programmable Filter Panel

Dennis,

Great! I'm glad it's what you are looking for.

You can hide any property by editing the XML file. In the property element, add an attribute called "panel_visibility" and set this to "never". This will hide the property from view. You can also set it to "advanced" so that it shows up only when the advanced option is enabled.

Here's an example:

      <StringVectorProperty
        panel_visibility="never"
        name="Script"
        command="SetScript"
        number_of_elements="1"
        default_values="my python script">
      <Documentation>This property contains the text of a python program that
      the programmable source runs.</Documentation>
      </StringVectorProperty>

Cheers,
Cory

On Thu, Sep 24, 2015 at 12:47 PM, Dennis Conklin <dennis_conklin at goodyear.com<mailto:dennis_conklin at goodyear.com>> wrote:
One more question – the original article says that

Alternatively, the Script properties can be hidden completely from the properties panel.

How is this accomplished?

Thanks again

Dennis

From: Dennis Conklin
Sent: Thursday, September 24, 2015 12:20 PM
To: 'Cory Quammen' <cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>>
Cc: Paraview (paraview at paraview.org<mailto:paraview at paraview.org>) <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: RE: [EXT] Re: [Paraview] More Customization of Python programmable Filter Panel

Cory,

Wow, that’s exactly what I need – now I just need to get some time to re-implement my filters using this!

Thanks again

Dennis

From: Cory Quammen [mailto:cory.quammen at kitware.com]
Sent: Thursday, September 24, 2015 11:07 AM
To: Dennis Conklin <dennis_conklin at goodyear.com<mailto:dennis_conklin at goodyear.com>>
Cc: Paraview (paraview at paraview.org<mailto:paraview at paraview.org>) <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: [EXT] Re: [Paraview] More Customization of Python programmable Filter Panel

Hi Dennis,

Answers inlined below.

On Wed, Sep 23, 2015 at 2:39 PM, Dennis Conklin <dennis_conklin at goodyear.com<mailto:dennis_conklin at goodyear.com>> wrote:
All,

Pat Marion discussed adding interactive Properties for a Programmable Filter here:
http://www.kitware.com/blog/home/post/534

I have a few questions about this:

1.       Is this still valid for v4.4 with the original python_filter_generator.py?
Yes, I just tested it.

2.      Have we added any other capability.  For instance,  I would love to present a list of variables to be calculated and let my user select or unselect each to decide exactly what he wants as output.   With a numeric field with 0 as unselect and 1 as select, people will always manage to type something else in there.    If this interface could have a checklist, or if fields could have a drop down list (Yes/No, etc) then this would greatly expand the utility of this technique.
You can do this if you have a fixed number of variables. Just list each variable option as a IntVectorProperty with a BooleanDomain in the XML. In the input file for the filter generator, just express these options with the default values, .e.g,


Properties = dict(

  generate_var1 = True,

  generate_var2 = False,

  generate_var3 = False

  )

The filter generator will convert each of these lines into XML of the following form:

      <IntVectorProperty
        name="generate_var1"
        label="generate var1"
        initial_string="generate_var1"
        command="SetParameter"
        animateable="1"
        default_values="1"
        number_of_elements="1">
        <BooleanDomain name="bool" />
        <Documentation></Documentation>
      </IntVectorProperty>


These properties will appear as checkboxes in the UI of your filter.

Of course, you can tweak the XML files that are generated if it doesn't get the label attribute for the property right, for instance.

I hope that helps.
Cory


So, is anyone using this and perhaps knows how to do these extended things?

Thanks for any hints

Dennis

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--
Cory Quammen
R&D Engineer
Kitware, Inc.



--
Cory Quammen
R&D Engineer
Kitware, Inc.



--
Cory Quammen
R&D Engineer
Kitware, Inc.
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