mingw/lib/tk8.4/demos/timer

   1 #!/bin/sh
   2 # the next line restarts using wish \
   3 exec wish "$0" "$@"
   4
   5 # timer --
   6 # This script generates a counter with start and stop buttons.
   7 #
   8 # RCS: @(#) $Id: timer,v 1.3 2001/10/29 16:23:33 dkf Exp $
   9
  10 label .counter -text 0.00 -relief raised -width 10 -padx 2m -pady 1m
  11 button .start -text Start -command {
  12     if {$stopped} {
  13         set stopped 0
  14         set startMoment [clock clicks -milliseconds]
  15         tick
  16         .stop configure -state normal
  17         .start configure -state disabled
  18     }
  19 }
  20 button .stop -text Stop -state disabled -command {
  21     set stopped 1
  22     .stop configure -state disabled
  23     .start configure -state normal
  24 }
  25 pack .counter -side bottom -fill both
  26 pack .start -side left -fill both -expand yes
  27 pack .stop -side right -fill both -expand yes
  28
  29 set startMoment {}
  30
  31 set stopped 1
  32
  33 proc tick {} {
  34     global startMoment stopped
  35     if {$stopped} {return}
  36     after 50 tick
  37     set elapsedMS [expr {[clock clicks -milliseconds] - $startMoment}]
  38     .counter config -text [format "%.2f" [expr {double($elapsedMS)/1000}]]
  39 }
  40
  41 bind . <Control-c> {destroy .}
  42 bind . <Control-q> {destroy .}
  43 focus .
  44
  45 # Local Variables:
  46 # mode: tcl
  47 # End: