AskMinMax adds 53 pixels in width and 46 pixels in height to all
superclass size fields and returns TRUE. Full Draw paints frame,
background, scale marks and an empty label field. Update Draw erases the
old needle with the background pen before drawing the new one. Draw
returns FALSE without full/update flags, otherwise TRUE and ignores
superclass/drawing results.
Setup returns Numeric's result even if ObtainBestPen fails. Draw uses
the stored pen without checking the -1 failure sentinel. The class has
no mouse handler of its own and retains Numeric's raw-key handler; it is
not automatically a read-only object merely because it looks like a
meter.