mingw/lib/tk8.5/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 1.4 2003/09/30 14:54:30 dkf Exp $
   9
  10 package require Tcl 8.4
  11 package require Tk
  12
  13 label .counter -text 0.00 -relief raised -width 10 -padx 2m -pady 1m
  14 button .start -text Start -command {
  15     if {$stopped} {
  16         set stopped 0
  17         set startMoment [clock clicks -milliseconds]
  18         tick
  19         .stop configure -state normal
  20         .start configure -state disabled
  21     }
  22 }
  23 button .stop -text Stop -state disabled -command {
  24     set stopped 1
  25     .stop configure -state disabled
  26     .start configure -state normal
  27 }
  28 pack .counter -side bottom -fill both
  29 pack .start -side left -fill both -expand yes
  30 pack .stop -side right -fill both -expand yes
  31
  32 set startMoment {}
  33
  34 set stopped 1
  35
  36 proc tick {} {
  37     global startMoment stopped
  38     if {$stopped} {return}
  39     after 50 tick
  40     set elapsedMS [expr {[clock clicks -milliseconds] - $startMoment}]
  41     .counter config -text [format "%.2f" [expr {double($elapsedMS)/1000}]]
  42 }
  43
  44 bind . <Control-c> {destroy .}
  45 bind . <Control-q> {destroy .}
  46 focus .
  47
  48 # Local Variables:
  49 # mode: tcl
  50 # End: