Re: info about graphic in scheme

[Robert Bruce Findler <robby@cs.rice.edu>]

This information is not stored anywhere. You will need to keep your 
own data structures that keep track of which pictures have been drawn 
and where.

Robby

>hi, I'm a student of computer science.
>I'm going to develop a graphical interface in scheme but i have a problem,
>i draw some Picture into a canvas and with the coordinate x y i 
>would like to know the bitmap who is draw on. Example:
>
>(send (send cnvCanvas get-dc) draw-bitmap (make-object bitmap% 
>PictureName) 10 10)
>
>GetPicture: x y --> picture
>
>GetPicture 10 10 ---> PictureName (or an unique identifier for this picture)
>
>can you help me?
>
>thanks