[Paraview] Ordered xml inputs?

[Utkarsh Ayachit]

There are two ways:

1> Use attribute "port_index" on the InputProperty to specify which
input port it's going to eg.

<InputProperty name="Source" port_index="0" command="AddInputConnection" ... />

<InputProperty name="Target" port_index="1" command="AddInputConnection" ... />

2> Use helper methods defined on the filter eg.
      void AddSource(vtkAlgorithmOutput* input) {
this->AddInputConnection(0, input); }
      void AddTarget(vtkAlgorithmOutput* input) {
this->AddInputConnection(1, input); }

   And use these as the command's for your two input properties.

Utkarsh



On Tue, Nov 3, 2009 at 11:16 AM, David Doria <daviddoria at gmail.com> wrote:
> Are the InputProperties specified in the XML file ordered?
>
> That is, if I do something like this in the VTK filter's RequestData
>
> vtkPolyData * Source = static_cast<vtkPolyData
> *>(this->GetExecutive()->GetInputData(0, 0));
> vtkPolyData * Target = static_cast<vtkPolyData
> *>(this->GetExecutive()->GetInputData(1, 0));
>
> Then in the XML I have this:
>
>      <InputProperty
>         name="Source"
>         command="AddSourceConnection"
>         clean_command="RemoveAllSources">
>        <ProxyGroupDomain name="groups">
>          <Group name="sources"/>
>          <Group name="filters"/>
>        </ProxyGroupDomain>
>        <DataTypeDomain name="input_type">
>          <DataType value="vtkPolyData"/>
>        </DataTypeDomain>
>        <Documentation>
>          Set the source data set. This data set that will move
> towards the target data set.
>        </Documentation>
>      </InputProperty>
>
>      <InputProperty
>         name="Target"
>         command="AddInputConnection"
>         clean_command="RemoveAllInputs">
>        <ProxyGroupDomain name="groups">
>          <Group name="sources"/>
>          <Group name="filters"/>
>        </ProxyGroupDomain>
>        <DataTypeDomain name="input_type">
>          <DataType value="vtkPolyData"/>
>        </DataTypeDomain>
>        <Documentation>
>          Set the target data set. This data set will stay stationary.
>        </Documentation>
>      </InputProperty>
>
> but no where was it specified that Source is input 0 and Target is
> input 1. Is the order implied? If so, maybe this is not such a good
> idea as it could get confusing if there are other types of properties
> (IntVectorProperty, for example) thrown in the mix. I'm assuming the
> placement of something like IntVector property does not matter (i.e.
> they could be listed before, after, or in between input properties?)
> and does not increment the InputProperty counter?
>
> Can anyone comment on this / confirm it is all correct?
>
> Thanks,
>
> David
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