# timer -- # This script generates a counter with start and stop buttons. # # SCCS: @(#) timer 1.6 96/02/16 10:49:20 label .counter -text 0.00 -relief raised -width 10 button .start -text Start -command { if $stopped { set stopped 0 tick } } button .stop -text Stop -command {set stopped 1} pack .counter -side bottom -fill both pack .start -side left -fill both -expand yes pack .stop -side right -fill both -expand yes set seconds 0 set hundredths 0 set stopped 1 proc tick {} { global seconds hundredths stopped if $stopped return after 50 tick set hundredths [expr $hundredths+5] if {$hundredths >= 100} { set hundredths 0 set seconds [expr $seconds+1] } .counter config -text [format "%d.%02d" $seconds $hundredths] } bind . {destroy .} bind . {destroy .} focus .