31 lines
814 B
Racket
31 lines
814 B
Racket
#lang scribble/doc
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@(require scribble/manual "shared.rkt" (for-label scheme teachpack/htdp/lkup-gui))
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@teachpack["lkup-gui"]{Lookup GUI}
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@defmodule[#:require-form beginner-require htdp/lkup-gui]
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The teachpack provides three functions:
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@defproc[(control [index natural-number?]) symbol?]{
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reads out the @scheme[index]th guess choice, starting with 0}
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@defproc[(view [msg (or/c string? symbol?)]) true/c]{
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displays its @scheme[msg] argument in the message panel}
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@defproc[(connect [event-handler (-> button% event% true/c)]) true/c]{
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connects a controller (@scheme[handler]) with the Check button displays frame}
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Example:
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@;%
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@(begin
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#reader scribble/comment-reader
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(schemeblock
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(connect
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(lambda (e b)
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(view (control))))
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))
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@;%
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This example simply mirrors what the user types in to the message field.
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