[kepler-dev] Ptolemy selection event api

[Matt Jones]

Shawn --

You should also discuss this with Ben Leinfelder, who has created a
more traditional GUI event subscription system to allow multiple views
of models to stay synchronized.  His work is probably very relevant to
your needs.

Matt

On Mon, Jul 13, 2009 at 7:25 PM, Christopher
Brooks<cxh at eecs.berkeley.edu> wrote:
>
>
> Shawn Bowers wrote:
>>
>> Hi Christopher,
>>
>> I was wondering if there is a listener api for vergil selection
>> events. In particular, for the tagging work we are doing, we would
>> like to register for and be notified of selection events on actors,
>> ports, the canvas (i.e., a model), channels, etc.
>>
>> Any pointers would be great.
>>
>> Thanks,
>> Shawn
>
> Hi Shawn,
>
> I took a look an to me it looks like the best place to start is
> ptolemy.vergil.basic.BasicGraphFrame.createHierarchy(), which
> gets the selection and then determines what NamedObjs are associated
> and processes them.
>
> Vergil uses Diva for things like Selection, see SelectionInteractor
> in
> http://ptolemy.berkeley.edu/ptolemyII/ptII7.0/ptII7.0.1/doc/codeDoc/diva/canvas/interactor/package-summary.html
>
> There are some diva tutorials in ptII/diva/canvas/tutorial, I'd probably
> start
> with the DragTutorial.
>
> ptolemy.vergil.basic.BasicGraphFrame implements a number of Listeners.
> ptolemy.vergil.basic.ExtendedGraphFrame extends BasicGraphFrame
> ptolemy.vergil.actor.ActorGraphFrame extends ExtendedGraphFrame.
>
> ActorGraphFrame has some private classes that extend AbstractAction
> that do the real work.
>
> I'm not that up on selection listeners. I'd probably start with
> http://www.j2ee.me/docs/books/tutorial/uiswing/events/index.html
> Then thing to do would be to figure out how to register your listeners
> without writing a class that extends ActorGraphFrame.
>
> If you have a NamedObj, you can get the Effigy by calling
> ptolemy.actor.gui.Configuration.findEffigy().  The Effigy should
> contain one or more Tableaus, which you can iterate through like
> ptolemy.actor.gui.Effigy.showTableau() does.
>
> For each tableau, you can get the JFrame by calling Tableau.getFrame().
> Once you have a JFrame, you can add listeners.
>
> The Ptolemy way to do this would be to have an attribute which you could
> drag in that would register your listeners for you.  It might also be
> possible to piggy back that attribute somewhere so that everything that
> was opened would get the listeners added, but I'm not sure about
> the details.  Probably the thing to do would be to add an attribute
> that would name a class that would be called at some point when the
> Effigy is created.  Configuration._openModel() seems like a possible
> location.
>
> Bert is working on a Decorator pattern, which might help here.
>
> Sorry about giving a quick brief answer, I did not have anything off
> the top of my head and knew that it would be hours before I could
> get around to looking at this.
>
> Someone else who has done more UI work probably has a better answer
> than mine.
>
> _Christopher
>
>
> --
> Christopher Brooks (cxh at eecs berkeley edu) University of California
> CHESS Executive Director                      US Mail: 337 Cory Hall
> Programmer/Analyst CHESS/Ptolemy/Trust        Berkeley, CA 94720-1774
> ph: 510.643.9841 fax:510.642.2718             (Office: 545Q Cory)
> home: (F-Tu) 707.665.0131 (W-F) 510.655.5480
> _______________________________________________
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>



-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Matthew B. Jones
Director of Informatics Research and Development
National Center for Ecological Analysis and Synthesis (NCEAS)
UC Santa Barbara
jones at nceas.ucsb.edu                       Ph: 1-907-523-1960
http://www.nceas.ucsb.edu/ecoinfo
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~