link="#009900" vlink="#007700" alink="#cc0000"> Teachpacks for How to Design Programs

Lkup GUI

lkup-gui.ss

The teachpack lkup-gui.ss implements three functions:

control : -> symbol
to read out the name that a user typed into the query field

view : (union string symbol) -> true
to display its argument in the message panel

modelT = (button% event% -> true)
connect : modelT -> true
to connect a controller with the Check button
displays frame

Example:

(connect 
 (lambda (e b)
   (view (control))))

This example simply mirrors what the user types in to the message field.