[Paraview] python programmable filter via xml with multiple input

[Fraser Callaghan]

Thanks for the clarification. I had tried this with the following error:
vtkPythonProgrammableFilter (0x5458a60): Attempt to connect input port
index 1 for an algorithm with 1 input ports.

I gather that 'SetNumberOfInputPorts()' should be called in the
constructor of the filter, which I gather is governed by the xml file?

If so, how can I expose editing of the algorithm constructor via the xml
file? 

Thanks,
Fraser




On Mon, 2014-09-29 at 08:48 -0400, Utkarsh Ayachit wrote:
> In your example, your XML is setup to provide the inputs on multiple
> "ports", while you're code is expecting multiple "connections" on same
> port. Use the following script, instead.
> 
>     print self.GetInputDataObject(0, 0).GetNumberOfPoints()
>     print self.GetInputDataObject(1, 0).GetNumberOfPoints()
> 
> Utkarsh
> 
> On Sat, Sep 27, 2014 at 8:10 AM, Fraser Callaghan
> <fraser.callaghan at sydney.edu.au> wrote:
> > Hi,
> >
> > I am able to run a python programmable filter accessing multiple inputs selected from the pipe line e.g:
> > #
> > numInputs = self.GetNumberOfInputConnections(0)
> > for i in range(numInputs):
> >          print self.GetInputDataObject(0,i).GetNumberOfPoints()
> > ##
> >
> > I am able to use the xml format to define multiple inputs in a cleaner way, but can not access the input data (example below).
> > Changing "command" value does not help.
> > How should I be accessing the inputs available from the xml setup?
> >
> > Thanks for the help,
> > Fraser
> >
> > xml file:
> >
> > <ServerManagerConfiguration>
> >   <ProxyGroup name="filters">
> >     <!-- ================================================================== -->
> >     <SourceProxy name="MyFilter" class="vtkPythonProgrammableFilter" label="MyFilter">
> >       <Documentation
> >          long_help="long help."
> >          short_help="short help.">
> >       </Documentation>
> >
> >       <InputProperty
> >          name="Input0"
> >                port_index="0"
> >          command="SetInputConnection">
> >         <ProxyGroupDomain name="groups">
> >           <Group name="sources"/>
> >           <Group name="filters"/>
> >         </ProxyGroupDomain>
> >         <DataTypeDomain name="input_type">
> >           <DataType value="vtkPolyData"/>
> >         </DataTypeDomain>
> >         <Documentation>
> >           Input data 0.
> >         </Documentation>
> >       </InputProperty>
> >
> >       <InputProperty
> >          name="Input1"
> >                port_index="1"
> >          command="SetInputConnection">
> >         <ProxyGroupDomain name="groups">
> >           <Group name="sources"/>
> >           <Group name="filters"/>
> >         </ProxyGroupDomain>
> >         <DataTypeDomain name="input_type">
> >           <DataType value="vtkPolyData"/>
> >         </DataTypeDomain>
> >         <Documentation>
> >           Input data 1
> >         </Documentation>
> >       </InputProperty>
> >
> >       <!-- Output data type: "vtkPolyData" -->
> >       <StringVectorProperty
> >         name="Script"
> >         command="SetScript"
> >         number_of_elements="1"
> >         default_values="print 'Filter Working'&#xA;print self.GetInputDataObject(0,0)&#xA;#prints polydata&#xA;print self.GetInputDataObject(0,1)&#xA;#prints None&#xA;&#xA;"
> >         panel_visibility="advanced">
> >         <Hints>
> >          <Widget type="multi_line"/>
> >        </Hints>
> >       <Documentation>This property contains the text of a python program that
> >       the programmable source runs.</Documentation>
> >       </StringVectorProperty>
> >
> >     </SourceProxy>
> >     <!-- End LandmarkTransformFilter -->
> >   </ProxyGroup>
> >   <!-- End Filters Group -->
> > </ServerManagerConfiguration>
> >
> >
> >
> > Error on loading:
> >
> > ERROR: In /home/utkarsh/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/VTK/Common/ExecutionModel/vtkAlgorithm.cxx, line 893
> > vtkPythonProgrammableFilter (0x56aff30): Attempt to connect input port index 1 for an algorithm with 1 input ports.
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-- 
Dr Fraser Callaghan
Research Fellow
Sydney Translational Imaging Laboratory
Charles Perkins Centre
The University of Sydney
NSW 2006 Australia
p: 02 8627 1700
e: fraser.callaghan at sydney.edu.au