To get back "values" from the server, you can use either "information properties" or "information objects".
Information properties are properites with information_only="1" set in the XML (eg. in Servers/ServerManager/Resources/rendering.xml the "Camera" proxy has "CameraPositionInfo" as an information property). Such properties need an "InformationHelper" which knows how to obtain the values from the server. For simple Get*() methods, you can use the <SimpleDoubleInformationHelper/> or <SimpleIntInformationHelper /> etc. based on the type of the property. Complex information helpers can be written as well. Look at TimeStepsInformationHelper (vtkSMTimeStepsInformationHelper.h|cxx) as an example. Information objects are used to get data from server which cannot be simply put in a property for example information about the data object produced by a filter (vtkPVDataInformation). These are vtkPVInformation subclasses. You can create you own vtkPVInformation subclass that knows how to collect information and then serialize/deserialize it for transfer to the client from the server (if needed). To gather such information, one uses vtkProcessModule::GatherInformation(vtkIdType connectionID, vtkTypeUInt32 serverFlags, vtkPVInformation* info, vtkClientServerID id) where "id" is vtkSMProxy::GetID() returned for the proxy from which you want to collect the information. In your case, information property may be an easier solution -- if I understand your problem correctly. There is a pqServerManagerModel instance accessible as pqApplicationCore::instance()->getServerManagerModel() that can be used to access sources/filters their representations, views etc. Take a look at Qt/Core/pqServerManagerModel.h for the API. That should help you access the visualization pipeline. "How to get, for instance, the ids of the nodes which are displayed after the application of a filter to the model ?" Not sure I understand what you mean by that. Can you please elaborate? Utkarsh On Tue, Dec 16, 2008 at 6:38 AM, Rafael March <rafaelmar...@yahoo.com> wrote: > Hey all, > > I'm programming a filter with a custom Object Panel, > and I'm feeling a little bit lost about the ParaView architecture and > code design. > > My great problem is the comunication between the > Object Panel and the Model. I know I can't have a pointer to my > vtkUnstructuredGrid displayed, 'cause they are not necessarily at the > same machine or process. I also know that I'm able to send information > to the model through properties, since I can get the vtkSMProxy in my > panel. But what about the way back ? Is there a way to send information > from the display view to the panel ? How can I display in a QTable, for > instance, the nodes of my model which have some property equals to 1 ? > > Another problem is the Visualization Pipeline: is there a way to "walk" on > it ? > I mean, if I have a filter name, am I able to get the the filter no > matter where it is in the Pipeline ? > > Sorry for the mess with the questions. I hope I made it clear and someone > can help me ! :) > > Regards, > Rafael March. > > _______________________________________________ > ParaView mailing list > ParaView@paraview.org > http://www.paraview.org/mailman/listinfo/paraview > > _______________________________________________ ParaView mailing list ParaView@paraview.org http://www.paraview.org/mailman/listinfo/paraview