Dear Bretheren, there is this great example in Tcl/Tk of a timer. Can someone help me do this in Perl::Tk? 

#!/bin/sh
# the next line restarts using wish \
exec wish8.5 "$0" "$@"

# timer --
# This script generates a counter with start and stop buttons.
#
# RCS: @(#) $Id: timer,v 1.4 2003/09/30 14:54:30 dkf Exp $

package require Tcl 8.4
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)/100
+0}]]
}

bind . <Control-c> {destroy .}
bind . <Control-q> {destroy .}
focus .

# Local Variables:
# mode: tcl
# End:

[download]

In reply to A timer in Tcl/Tk in Perl::Tk by pashanoid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.