In comp.soft-sys.ptolemy, "[EMAIL PROTECTED] (Russ)", wrote: > A question about directors: should there ever be more than one > director at the top-level of a simulation? > > I was playing with the Spectrum demo model from the SDF domain, and > added a 2nd SDF Director with a iterations parameter that differed > from the iterations parameter for the 1st SDF director. > > The simulation seemed to use the director that had been added last to > the model, ignoring the other director. I am not too familiar with > the overall architecture of Ptolemy, but I can't grasp when you would > ever want two directors at the top level of the simulation. > > Should Ptolemy enforce one top-level director per model? I am also > thinking that if I wanted to create my own director with some utility > methods that any actor could call, I would probably only want a single > instance of the director (maybe make it a singleton?). > > Thanks for any insights. > > Regards, > Russ
Right, this is a known feature. In a posting to our internal mail alias, Professor Lee wrote: > In actor.Director, I updated the setContainer() method so it does > this: > > * If this method results in removing this director from a container > * that is a CompositeActor, then this director ceases to be the active > * director for that CompositeActor. Moreover, if the composite actor > * contains any other directors, then the most recently added of those > * directors becomes the active director. > > What this means is that in vergil, you can drag into a design multiple > directors. The most recently added director is the "active" one. But > the others are kept around as attributes. If you remove the active > director, then the most recently added of the remaining directors > becomes the active one. > > Edward I believe that you could require that your director be the only director, but it might be a little tricky to get right. -Christopher Christopher Hylands [EMAIL PROTECTED] University of California Programmer/Analyst Chess/Ptolemy/GSRC US Mail: 558 Cory Hall #1770 ph: (510)643-9841 fax:(510)642-2739 Berkeley, CA 94720-1770 home: (510)526-4010, (707)665-0131 (office: 400A Cory) ---------------------------------------------------------------------------- Posted to the ptolemy-hackers mailing list. Please send administrative mail for this list to: [EMAIL PROTECTED]
