Hi Jon, Factor's namespaces vocabulary implements dynamically-scoped variables. This means if you set a variable in the scope of the code calling open-window, your draw-gadget* and other callbacks won't be able to see that variable since that code runs in a different scope (and indeed, in a different thread).
There are several ways to share state between gadgets: - Put it all in slots of a parent gadgets (that will subclass track, pack, frame, or similar). Have the children use find-parent to find the parent. Eg, [ foo-gadget? ] find-parent tidbit>> - Use local variables and lexical scope to bake your values into closures, storing the closure in a button's callback quotation or something. Look at "locals" about - Use global variables. I don't recommend this for obvious reasons. Slava On Thu, Apr 9, 2009 at 4:26 AM, Jon Kleiser <jon.klei...@usit.uio.no> wrote: > Hi, > > In my little OpenGL "pyramids" project I want to make use of a variable > holding an angle value that represents the current degree of folding. I've > tried to use the "vars" vocabulary, but when I do things like "VAR: > pyr-rot 32.0 >pyr-rot" in the upper part of my program, the word pyr-rot> > don't seem to give me anything (but f) where I need the value, in my > pyramids-scene word. There must be something about scope here that I don't > understand. Can somebody give me a clue? > > My little project, which is to a high degree based on Joe Groff's > "spheres" code, can be found here: > <https://vortex.uio.no/brukere/jkleiser/factor/> > > /Jon > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > Factor-talk mailing list > Factor-talk@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/factor-talk > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
