Dial(3) perl/Tk Documentation Dial(3)NAME
Dial - an alternative to the scale widget
SYNOPSIS
use Tk::Dial;
$dial = $top->Dial(-margin => 20,
-radius => 48,
-min => 0,
-max => 100,
-value => 0,
-format => '%d');
margin - blank space to leave around dial
radius - radius of dial
min, max - range of possible values
value - current value
format - printf-style format for displaying format
Values shown above are defaults.
DESCRIPTION
A dial looks like a speedometer: a 3/4 circle with a
needle indicating the current value. Below the graphical
dial is an entry that displays the current value, and
which can be used to enter a value by hand.
The needle is moved by pressing button 1 in the canvas and
dragging. The needle will follow the mouse, even if the
mouse leaves the canvas, which allows for high precision.
Alternatively, the user can enter a value in the entry
space and press Return to set the value; the needle will
be set accordingly.
TO DO
Configure
Tick marks
Step size
AUTHORS
Roy Johnson, rjohnson@shell.com
Based on a similar widget in XV, a program by John
Bradley, bradley@cis.upenn.edu
HISTORY August 1995: Released for critique by pTk mailing list
25/Aug/1997 Tk400.202 1
