** Summary **
[Richard Suchenwirth] 2002-04-15: This stopwatch, a small [Tk dExamples%|%Tk examople], has a Start
button, a MM:SS.CC time display (CC being "centiseconds", or 1/100 of a
second), and a Stop button. Precision measured in centiseconds excluded using
''[clock] format'', as that is only able to render full seconds, so the time is
obtained from ''[clock] clicks -milliseconds'' and formatted explicitly from
three [expr]s . Clicking ''Start'' of course starts the stop-watch (and
disables that button to prevent multiple event chains). Clicking ''Stop'' stops
the display, to read intermediate times, but internally the clock (expressed in
the global ''time0'' variable) keeps ticking. After a second click on ''Stop'',
it is reset to 00:00.00.
Some internationalization is also demonstrated. Edit the
''[msgcat]::mclocale'' line to see other languages.
A [starkit] version of this code is available on [sdarchive].
** Description **
======
package require Tk
option add *Button.padY 0 ;# to make it look better on Windows
option add *Button.borderWidth 1
#---------------------------------------------------- testing i18n
package require msgcat
namespace import msgcat::mc msgcat::mcset
mcset de Start Los
mcset de Stop Halt
mcset fr Start Allez
mcset fr Stop Arrêtez
mcset zh Start \u8DD1
mcset zh Stop \u505C
msgcat::mclocale en ;# edit this line for display language
#--------------------------------------------------------------- UI
button .start -text [mc Start] -command Start
label .time -textvar time -width 9 -bg black -fg green
set time 00:00.00
button .stop -text [mc Stop] -command Stop
eval pack [winfo children .] -side left -fill y
#------------------------------------------------------- proceduresproc every {ms body} {eval $body; after $ms [namespace code [info level 0]]}
proc Start {} { if {$::time==" eq {00:00.00"}} {
set ::time0 [clock clicks -milliseconds]
}
every 10 {
set m [expr {[clock clicks -milliseconds] - $::time0}]
set ::time [format %2.2d:%2.2d.%2.2d \
[expr {$m/60000}] [expr {($m/1000)%60}] [expr {$m%1000/10}]]
}
.start config -state disabled
}
proc Stop {} {
if {[llength [after info]]} {
after cancel [after info]
} else {set ::time 00:00.00}
.start config -state normal
}
======
Wow - that is small!!
For everyday use, I like [stopwatch] written by [Don Libes].
----
Replacing expression for computing seconds
======
[expr {($m/1000-$m%10)%60}]
======
to
======
[expr {($m/1000)%60}]
======
makes the seconds display work correctly.
[RS]: Thanks, fixed (but it looked correct before, in my tests...)
----
[MPJ]: Also see [iLogWatch] for a version of this that adds a logging window and the
ability to save the start, stop and split times.
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