[Paraview-developers] Question about SubProxy

[Utkarsh Ayachit]

David,

I am correct is assuming that you have  ProxyProperty on the filter proxy
that you are expecting have this Contour proxy be set on? In that case, I
don't think that's what you want. Here's what I'd suggest:

1. Remove the ProxyProperty from your filter XML.
2. Change your XML as follows:



      <SubProxy* command="SetContourProxy"*>

        <Proxy name="ContourProxy" proxygroup="filters" proxyname="Contour"
 />

        <ExposedProperties>

          <Property name="SelectInputScalars" />

          <Property name="ComputeNormals" />



        </ExposedProperties>

      </SubProxy>


Note the *command* attribute on SubProxy.


On Tue, May 16, 2017 at 6:40 AM, David Lawrie <dlawrie at ara.co.uk> wrote:

> Hi All,
>
>
>
> I am trying to create a simple filter that uses the SubProxy approach as
> a learning exercise as I believe it will be useful in  a more complex
> filter I will need to create later.
>
>
>
> Currently I am trying to create a filter which has a Contour sub-filter,
> exposes a couple of the properties then runs the contour filter using the
> user set values.
>
>
>
> In my XML I have the following subproxy block
>
>
>
>       <SubProxy>
>
>         <Proxy name="ContourProxy" proxygroup="filters" proxyname="Contour
> " />
>
>         <ExposedProperties>
>
>           <Property name="SelectInputScalars" />
>
>           <Property name="ComputeNormals" />
>
>
>
>         </ExposedProperties>
>
>       </SubProxy>
>
>
>
> In my filter header I have included the following lines to provide storage
> for the sub-proxy and my constructor sets it to NULL at creation.
>
>
>
> vtkSetObjectMacro(ContourProxy, vtkPVContourFilter);
>
> vtkPVContourFilter* ContourProxy;
>
>
>
> So far so good, the gui does have the elements which are exposed, however
> the drop down box is empty and as far as I can tell the ContourProxy
> variable remains NULL. Presumably I have to create the vtkPVContourFilter
> object somewhere, however I am unsure as to how/where.
>
>
>
> Can anyone provide some guidance on what steps I am missing?
>
>
>
> Thanks.
>
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