[Paraview] XML plugin based on programmable filter with a slider

[Shuhao Wu]

Hello Alessandro:

It may be possible but it's not obvious to me. I suspect I can use the 
ArrayListDomain xml element but I don't quite understand how it works. I 
also don't have time right now to dive into the PV source code.

I do see from the Threshold filter:

       <DoubleVectorProperty command="ThresholdBetween"
                             default_values="0 0"
                             label="Threshold Range"
                             name="ThresholdBetween"
                             number_of_elements="2"
                             panel_widget="double_range">
         <ArrayRangeDomain name="range">
           <RequiredProperties>
             <Property function="Input"
                       name="Input" />
             <Property function="ArraySelection"
                       name="SelectInputScalars" />
           </RequiredProperties>
         </ArrayRangeDomain>
       </DoubleVectorProperty>

Perhaps someone from the Paraview development team can chime in on this 
issue? I'll be happy to add it once I understand how it actually works.

Thanks,
Shuhao

On 2018-03-22 09:59 AM, Alessandro De Maio wrote:
> Hello  Shuhao,
>     thank you for your reply and for your really great job on the
> pvpyfilter. I had already tried it and it's very useful.
> But I'm looking for the possibility to automatically assign the slider
> range (in this case the upper value will be enough) depending on
> information about the input of the programmable filter (in this case the
> number of blocks of a multiblock dataset) and not to set it hardcoded in
> the xml as from your approach. I would like that, if I apply this filter to
> a mbdataset with 5 blocks, the slider can choose an int value from 0 to 4,
> and if I apply the same filter (without modifying xml) to another mbdataset
> with 8 blocks the slider provides an int from 0 to 7.
> 
> Cheers
> 
> Alessandro
> 
> PS With pvpyfilter is there the possibility of decide in the .py file the
> order of the widgets in the property panel? It seems to me that the order
> is random
> 
> On Thu, Mar 22, 2018 at 12:39 AM, Shuhao Wu <shuhao at shuhaowu.com> wrote:
> 
>> Accidentally hit Reply instead of hit Reply list. The record is below:
>>
>> -------- Forwarded Message --------
>> Subject: Re: [Paraview] XML plugin based on programmable filter with a
>> slider
>> Date: Wed, 21 Mar 2018 19:38:40 -0400
>> From: Shuhao Wu <shuhao at shuhaowu.com>
>> To: Alessandro De Maio <demaio.a at gmail.com>
>>
>> Hello Alessandro,
>>
>> I just published a library that allows you to do _just this_. See:
>> https://github.com/shuhaowu/pvpyfilter
>>
>> The example covers exactly this and specifically you can use the property:
>>
>> double_slider = Double("double with slider", default=0.5, slider=[0.0,
>> 1.0], help="double with slider between 0.0 and 1.0 and a default of 0.5")
>>
>> Let me know if the library works for you or if you encounter any bug as it
>> is still early days for this library.
>>
>> Cheers,
>> Shuhao
>>
>> On 2018-03-21 01:37 PM, Alessandro De Maio wrote:
>>> Hello,
>>> I'm trying to write a plugin based on a programmable filter in order to
>>> extract a single block from a multiblockdataset (with a single level
>> tree)
>>> in input chosing it through a slider in the property panel.
>>> I need help to automatically set the range of the slider (the higher
>> limit
>>> as the lower is always 0) as the number of blocks of the
>> multiblockdataset
>>> in input, but the XML ServerManager definition of the slider is not clear
>>> enough for me.
>>>
>>> I'm trying to follow Utkarsh suggestion in
>>>
>>> https://public.kitware.com/pipermail/paraview/2009-March/011599.html
>>>
>>> but I'm missing how to recovery the number of blocks of the input of the
>>> programmable filter and how to set it as the upper value of the slider
>>> range.
>>>
>>> Thank you in advance for your kind help
>>>
>>> Alessandro
>>>
>>>
>>>
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