[Paraview-developers] Writing a plugin that automatically adds a source after ParaView client starts up

[Utkarsh Ayachit]

Cory,

Attached is a modified version of the Autostart plugin example that
does what you expect.

Utkarsh

On Fri, Jul 29, 2011 at 11:15 AM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> Hi all,
>
> I'm trying to write a plugin that will add a source to ParaView
> immediately after the client starts up. I've figured out the code
> needed to create the source. Now, the only problem is figuring out
> when to call this code.
>
> I'm attempting to do this with an autostart plugin. The problem is
> that plugins appear to be loaded *before* everything my plugin needs
> is set up, so setting up the source within the onStartup() method in
> my autostart plugin does not work.
>
> What I'd like to be able to do is set up a slot in my plugin that
> connects to a Qt signal that is fired after everything necessary for
> adding a source is set up. Unfortunately, the signals I've tried
> (listed below) appear to be emitted too early:
>
> pqServerManagerModel::serverAdded(pqServer *)
> pqActiveObjects::serverChanged(pqServer *)
>
> Specifically, I am getting an error in pqPipelineModel.cxx:934, "Could
> not locate server on which the source is being added." It seems the
> server hasn't yet been added to the pqPipelineModel.
>
> Does anyone have a suggestion for a signal that is emitted towards the
> very end of the client program startup? Other suggestions on how to
> add a source after startup are also appreciated. I'd like to avoid
> modifying the ParaView application code itself if at all possible.
>
> Thanks,
> Cory
>
> P.S.
>
> In case it is helpful, here is the code I'm using to set up the source:
>
>  pqActiveObjects* activeObjects = &pqActiveObjects::instance();
>  pqApplicationCore* app = pqApplicationCore::instance();
>  pqObjectBuilder* builder = app->getObjectBuilder();
>  pqPipelineSource *text = builder->createSource("sources",
>                                                 "TextSource",
>
> pqActiveObjects::instance().activeServer());
>  text->rename(tr("Text"));
>  text->setModifiedState(pqProxy::UNMODIFIED);
>  pqDisplayPolicy* displayPolicy =
> pqApplicationCore::instance()->getDisplayPolicy();
>  displayPolicy->setRepresentationVisibility(
>    text->getOutputPort(0), pqActiveObjects::instance().activeView(), true);
>
>
> --
> Cory Quammen
> Research Associate
> Department of Computer Science
> University of North Carolina at Chapel Hill
> http://www.cs.unc.edu/~cquammen
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> Paraview-developers at paraview.org
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>
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