An ValueAxis is a class responsible for mapping points in data space to points in screen space, as well as maintaining state related to drawing axis ticks and labels. A given axis may be horizontal or vertical in orientation depending on the {@link CompositeAxisPanel} it is placed into, and rendered on theleft/right or top/bottom depending on the AxisPanel position as well.
In GSS, a ValueAxis may be referred to using a CSS selector 'axis'. Each axis is numbered, can have several CSS classes, depending on subtypes, like "axis.range" or "axis.domain". See {@link AxisPanel} for more details.
@see org.timepedia.chronoscope.client.render.AxisPanel