Description:

This widget creates an analog gauge. A gauge has various components: a
radius highlighted by a circumference, one or more needles, a hub, three
granularities of tick marks, one of which has a value label, a caption,
title and specialized bands that visually compartmentalize the gauge.

A gauge's appearance is specified by manipulating a set of approximately 60
options, all described below. Given this flexibility one may create
instruments including, but not limited to, a 12 or 24 hour clock, CPU
meter, voltmeter, fuel and temperature gauge, speedometer and tachometer.

The following option/value pairs are supported (default value in
parentheses):