[Paraview] How to update GUI/paraview when data and time change in a reader ?

[R M]

Hi,

Here’s my problems. I have a reader that load a geometry and some attributes (at 
the points). These attributes changed in the time and I can select one of them 
in a combo box (GUI in the reader).
For example, I have 2 attributes «A» and «B».  So In the reader, by default the 
first attribute is seleted (« A »).  The  selection in the reader GUI makes  the 
call of a method doing the change of the selected attribute (« A ») and 
corresponding time values. For time values it looks like this :

vtkDemandDrivenPipeline* ddp = 
vtkDemandDrivenPipeline::SafeDownCast(this->GetExecutive());
vtkInformationVector* outputVector = ddp->GetOutputInformation();
vtkInformation* outInfo = outputVector->GetInformationObject(0);
                    
outInfo->Set(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), & timeData[0], 
numTimeData);                   

                                  
doubletimeRange[2];
 
timeRange[0] = timeData[0];
timeRange[1] = timData[numTimeData-1];                      
                    
outInfo->Set(vtkStreamingDemandDrivenPipeline::TIME_RANGE(), timeRange, 2);
 
The problems are the following. When I select «B» and make apply, timevalues 
corresponding to «B» are set and a new vtkPolyData is made with the 
corresponding point attribute data of «B» for the given time step. But, in 
paraview, the mapped variable of the toolbars is not update. «A» is always here 
(whereas I would like to have «B»). 


-> How and where can we say to paraview to update the GUI and have the B appears 
in the mapped variable of the toolbars ?

Moreover, Paraview has a geometry cache  (Edit/settings /Animation). But when 
for example atributes «A» and «B» have the same time values and that we have 
selected all the time step for « A », when we select «B», nothing is done 
because paraview has cached data for the «A» and for the same time values than 
«B». So paraview doesn’t need to update beacause it considerer to have data for 
the requested time step.

-> So, How can I say to Paraview that when a new attribute is selected, it needs 
to empty it’s cache and load data for requested time ?
 
Thank you.


      
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