On 11/22/06, Bernhard Graf <bgraf@adartis.de> wrote:
Hi Ken,

yes, the only demo for ltk is in fact the spinning lines demo. Demo's like the one you provide for your Celtk or Cells-TK would be really great for ltk.
The reason why I use ltk is simply that I want to do it on my PowerBook and Cells and everything related to it seem only be supported on Linux and Windows.

Nope. :)

Or has anyone got it working on a Mac as well, either on openMCL or SBCL ?

Yep. :)  I had the whole thing working on OpenMCL a while back (when it was atop Freeglut) and someone helping now is running it on OS X via SBCL.

I am also stuck again with my ltk trials. I know that e.g. "entry" delivers its content as text and this can be used with (text entry_variable) It seems to come from a tktextvariable, according to the source in ltk.lisp.
I was able to display a slider (scale), but I have no idea on how to get its current value. What type is it ? Which method needs to be used to get it ?
If only these informations were given in the ltk documentation, it would be really helpful. Unfortunately, the source seems to be the only documentation. Nice for Lisp geeks, but problematic for people like me ;-)

I think one meta-help I can give you is to take something like your scale issue and look it up on the tcl/tk site itself. I used the ActiveTcl page itself:

   http://aspn.activestate.com/ASPN/docs/ActiveTcl/8.4/at.pkg_index.html

Find out how a tcl user would get the scale value and work backwards, searching the Ltk source for whatever that is. Hang on -- had a flash -- it might even be that the path to the scale is the variable you read (going on some memory, some common sense) so you just need to fo the LTk to read the variable .this.that.my-scale

Back to my meta-help, I think the LTk doc itself does recommend using Tcl/Tk doc in conjunction with LTk examples/doc/source. Kind of a delicat balancing act where you have to guess if you have a Lisp, LTk, or Tk issue.



PS : I heard that you are designing a math tutorial software for kids. If you ever need someone to translate it to German, give me a call ;-)

OK. I almost wrote "the whole shebang" earlier, then backed off because of the slanginess. Know that one? :)

kt