[Paraview] Question on Information Objects

[burlen]

hi, information keys are more for passing info between filters through 
the pipeline. if all you want is to display a string, you could make a 
second output port to your reader that produces a vtkTable and populate 
it with the string. This could be displayed in the pv ui. here's a quick 
example of what you'd do in your request data:


315   vtkInformation *outInfo;
316   vtkTable *output;
317   vtkStringArray *data;
318
319   // output port 1 -> bw data
320   outInfo=outputVector->GetInformationObject(0);
321   output
322     = 
dynamic_cast<vtkTable*>(outInfo->Get(vtkDataObject::DATA_OBJECT()));
323   data=vtkStringArray::New();
324   data->SetName("BW Data");
325   data->SetNumberOfComponents(1);
326   data->InsertNextValue(bwData.c_str());
327   output->AddColumn(data);
328   data->Delete();



On 03/22/2012 03:38 PM, Joshua Murphy wrote:
> Hello,
>
> I am trying to get meta-data information from a file into ParaView.  I 
> have successfully built the information key-value pairs in the 
> information object in my reader, but I am uncertain how to get the 
> data out on the ParaView side of things.
>
> Example:
>
> I want to get the Calendar date meta-data from my model file.  I added 
> Key to the information object to the results info object.
>
> I set keys as follows:
>
>    request->AppendUnique(vtkExecutive::KEYS_TO_COPY(), vtkENLILMetaDataKeys::REFDATE_CAL());
>
>
> I have a function to add the value to the key like such:
>
> void vtkENLILMetaDataKeys::populate_meta_data(vtkInformation* request, vtkInformationStringKey *key, char* value)
> {
>    request->Set(key, value);
> }
>
>
> I then add the values to the keys as follows:
>
>    vtkENLILMetaDataKeys::populate_meta_data(outInfo, vtkENLILMetaDataKeys::REFDATE_CAL(), temp);
>
> After I do this, I can successfully pull the placed data from the 
> information object from within the reader.
>
> What I cannot figure out is how to access this object from within 
> Paraview.
>
> My goal is to be able to include the calendar date (as text) in the 
> render view.
>
> Can someone guide me in the correct direction on how to do this?  I am 
> looking for possibly a python way of getting at this data.
>
> Thanks,
>
> Josh
>
>
>
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