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Annotation of micropolis/src/tk/library/demos/timer, revision 1.1.1.1

1.1       root        1: #!/usr/local/bin/wish -f
                      2: #
                      3: # This script generates a counter with start and stop buttons.
                      4: 
                      5: label .counter -text 0.00 -relief raised -width 10
                      6: button .start -text Start -command "set stop 0; tick"
                      7: button .stop -text Stop -command {set stop 1}
                      8: pack append . .counter {bot fill} .start {left expand fill} \
                      9:        .stop {right expand fill}
                     10: 
                     11: set seconds 0
                     12: set hundredths 0
                     13: set stop 0
                     14: 
                     15: proc tick {} {
                     16:     global seconds hundredths stop
                     17:     if $stop return
                     18:     after 20 tick
                     19:     set hundredths [expr $hundredths+2]
                     20:     if {$hundredths >= 100} {
                     21:        set hundredths 0
                     22:        set seconds [expr $seconds+1]
                     23:     }
                     24:     .counter config -text [format "%d.%2d" $seconds $hundredths]
                     25: }
                     26: 
                     27: bind . <Control-c> {destroy .}
                     28: bind . <Control-q> {destroy .}
                     29: focus .

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