Are you sure you need to implement a new-canvas%? I think you only have to do that if you need some king of custom editing capabilities.
(I don't have a good example now. Perhaps an editor that understand the indentation rules of the old Fortran fixed-form format, where the first 6 characters have special meaning. When you hit enter, you must jump to the correct position, that is different from the standard position.) Usually you only need to create a new #lang: http://docs.racket-lang.org/guide/hash-languages.html and then you can customize the standard editor to adapt the syntax highlighting. Gustavo On Mon, Dec 1, 2014 at 9:00 PM, Stephen De Gabrielle <[email protected]> wrote: > I don't *do* languages in racket, but I think this may be a helpful part of > the documentation: > http://docs.racket-lang.org/syntax-color/index.html > Stephen > > > > On Mon Dec 01 2014 at 9:35:14 PM Florent PASTOR <[email protected]> > wrote: >> >> Hello, >> I am a french student and I have to do a project for my studies... >> The project is a compilator from a lambda language to racket. >> >> I use the racket/gui and i defined an editor-canvas% to write in my >> lambda language. I would like implement the syntax coloring for my >> language. >> To do this, I re defined the on-char method ( define/override ) but, >> when i write now on my keyboard, the text doesn't appear in my >> editor-canvas%.... >> Is it possible to just add at the end of the function on-char (without >> changing the on-char), a new function called "color-key" (for example) >> (previously defined by me) to coloring the text just insered ? >> >> Thank you very much >> Best regards >> ____________________ >> Racket Users list: >> http://lists.racket-lang.org/users > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > ____________________ Racket Users list: http://lists.racket-lang.org/users
