[Paraview] Module Doesn't Get Variable Selection

[Kent Eschenberg]

A new ParaView module I am writing tries to get the user's selection of a 
variable in "RequestData" with

   vtkDataArray *D = this->GetInputArrayToProcess( 0, inputVector );

but D is always a null. The GUI shows a pulldown menu for this selection 
that shows all of the input object's variables as expected. The GUI 
definition for this selection is

      <ArrayMenu
         id="arrMen"
         input_menu="inpMen"
         trace_name="Scalars"
         property="VariableForDensity"
         label="Density Scalar"
         help="Input cell scalar used for point density"
      />

and the corresponding piece of the server XML is

         <StringVectorProperty name="VariableForDensity"
            command="SetInputArrayToProcess"
            number_of_elements="5"
            element_types="0 0 0 0 2"
         >
            <ArrayListDomain  name="array_list"
               attribute_type="Scalars"
               input_domain_name="input_array1"
            >
               <RequiredProperties>
                  <Property name="Input" function="Input"/>
               </RequiredProperties>
            </ArrayListDomain>
         </StringVectorProperty>

I've attached the complete XML for the new module. The new module inherits 
vtkPolyDataAlgorithm. I've been using vtkRibbonFilter as a guide.

Can anyone suggest where to look for the cause of this problem? Thanks!


Kent
Pittsburgh Supercomputing Center
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cloudGUI.xml
Type: text/xml
Size: 2403 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/paraview/attachments/20060630/2600f701/cloudGUI.bin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cloudSM.xml
Type: text/xml
Size: 3042 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/paraview/attachments/20060630/2600f701/cloudSM.bin