racket/teachpack/htdp/Docs/guess-gui.thtml
2005-05-27 17:52:04 +00:00

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{ (define LIBNAME "Guess GUI")
(include "head.tinc") }
<p>The teachpack <code>guess-gui.ss</code> implements three functions:
<menu>
<li> <code>{(idx control)} : N -> symbol</code>
<br> to read out the i-th guess choice, starting with 0
<li> <code>{(idx view)} : (union string symbol) -> true </code>
<br> to display its argument in the message panel
<li> <code>modelT = (button% event% -> true)</code>
<br>
<code>{(idx connect)} : modelT -> true</code>
<br> to connect a controller with the Check button
<br> displays frame
</menu>
<p>Example:
<pre>
(connect (lambda (e b)
(begin
(printf "0th digit: ~s~n" (control 0))
(view (control 0)))))
</pre>
{(include "foot.tinc")}