It is possible that the timer times out in middle of a progress event which happens while filters are executing.
Utkarsh On Mon, May 31, 2010 at 7:32 AM, Biddiscombe, John A. <biddi...@cscs.ch> wrote: > We have been developing an interface which allows us to control our > simulations on the fly and have used a Qtimer in a custom panel, to query > when new data is available from the server. When data is ready we > > > > when the timer is triggered and the server reports that data is ready, we do > a number of bookkepping taks, and then update the pipeline/representation > and other stuff using server manager objects like so... > > > > this->Reader->InvokeCommand("Modified"); > > this->Reader->UpdatePropertyInformation(); > > this->Reader->UpdateVTKObjects(); > > this->Reader->UpdatePipeline(); > > > > and finally after more stuff ... trigger a render ... > > > > > > if (pqActiveObjects::instance().activeView()) > > { > > pqActiveObjects::instance().activeView()->render(); > > } > > > > This has been working fine for some months, but recently, we’ve been getting > strange errors which look like the paraview client is interacting with the > server manager, at the same time as we are triggering updates. A classic > threading type problem. [We have added another thread to pvserver which > accepts data from the simulation via its own socket communicator, this > appears stable as we can do much stuff without forcing updates in the > pvclient gui and we get no errors, these threads reside only inside pvserver > ] > > > > Within a Qt+ParaView framework, can anyone tell me if it is “safe” to Update > pipelines from the server manager within a timer triggered slot. Is there an > existing example of anything similar which updates server manager objects > from a timer – also forcing renders. I know that rendering should be > triggered from the gui thread only – should this be removed from the Qtimer > slot. > > > > Any feedback welcome. > > > > Thanks > > > > JB > > > > -- > > John Biddiscombe, email:biddisco @ cscs.ch > > http://www.cscs.ch/ > > CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07 > > Via Cantonale, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82 > > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview > > _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview