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rosetta-code.metronome: usage, validation

db4
Jon Harper 2013-10-17 01:58:27 +02:00 committed by John Benediktsson
parent d067e50ef5
commit 91fce8c90b
1 changed files with 18 additions and 4 deletions
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extra/rosetta-code/metronome/metronome.factor
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@ -1,8 +1,9 @@
! Copyright (C) 2013 Jon Harper.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors calendar circular colors.constants colors.hsv
command-line kernel math math.parser namespaces openal.example
sequences timers ui ui.gadgets ui.pens.solid ;
command-line continuations io kernel math math.parser namespaces
openal.example sequences system timers ui ui.gadgets
ui.pens.solid ;
IN: rosetta-code.metronome
: bpm>duration ( bpm -- duration ) 60 swap / seconds ;
@ -44,13 +45,26 @@ M: metronome-gadget pref-dim* drop { 200 200 } ;
: metronome-example ( -- ) metronome-defaults metronome-ui ;
: validate-args ( int-args -- )
[ length 2 < ] [ [ 0 <= ] any? ] bi or [ "args error" throw ] when ;
: (metronome-cmdline) ( args -- bpm notes )
[ string>number ] map unclip swap ;
[ string>number ] map dup validate-args
unclip swap ;
: metronome-cmdline ( -- bpm notes )
command-line get [ metronome-defaults ] [ (metronome-cmdline) ] if-empty ;
: print-defaults ( -- )
metronome-defaults swap prefix
[ " " write ] [ number>string write ] interleave nl ;
: metronome-usage ( -- )
"Usage: metronome [BPM FREQUENCIES...]" print
"Arguments must be non-zero" print
"Example: metronome " write print-defaults flush ;
: metronome-main ( -- )
[ metronome-cmdline metronome-ui ] with-ui ;
[ [ metronome-cmdline metronome-ui ] [ drop metronome-usage 1 exit ] recover ] with-ui ;
MAIN: metronome-main