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Diffstat (limited to 'tk8.6/library/demos/timer')
| -rw-r--r-- | tk8.6/library/demos/timer | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tk8.6/library/demos/timer b/tk8.6/library/demos/timer new file mode 100644 index 0000000..6b61ca4 --- /dev/null +++ b/tk8.6/library/demos/timer @@ -0,0 +1,47 @@ +#!/bin/sh +# the next line restarts using wish \ +exec wish "$0" ${1+"$@"} + +# timer -- +# This script generates a counter with start and stop buttons. + +package require Tk + +label .counter -text 0.00 -relief raised -width 10 -padx 2m -pady 1m +button .start -text Start -command { + if {$stopped} { + set stopped 0 + set startMoment [clock clicks -milliseconds] + tick + .stop configure -state normal + .start configure -state disabled + } +} +button .stop -text Stop -state disabled -command { + set stopped 1 + .stop configure -state disabled + .start configure -state normal +} +pack .counter -side bottom -fill both +pack .start -side left -fill both -expand yes +pack .stop -side right -fill both -expand yes + +set startMoment {} + +set stopped 1 + +proc tick {} { + global startMoment stopped + if {$stopped} {return} + after 50 tick + set elapsedMS [expr {[clock clicks -milliseconds] - $startMoment}] + .counter config -text [format "%.2f" [expr {double($elapsedMS)/1000}]] +} + +bind . <Control-c> {destroy .} +bind . <Control-q> {destroy .} +focus . + +# Local Variables: +# mode: tcl +# End: |