coyote: CGCOORD__DEFINE

Description
An object for maintaining a coordinate system for data annotation or display.
Simply calling the Draw method of the object sets up the data coordinate system.
Categories
Object Programming, Graphics
Author
FANNING SOFTWARE CONSULTING::
 David W. Fanning 
 1645 Sheely Drive
 Fort Collins, CO 80526 USA
 Phone: 970-221-0438
 E-mail: david@idlcoyote.com
 Coyote's Guide to IDL Programming: http://www.idlcoyote.com
History
Change History::
   Written, by David W. Fanning, 7 November 2011.
Copyright
Copyright (c) 2011, Fanning Software Consulting, Inc.
e initialization method of the object.
Keywords
position: in, optional, type=float
   The normalized position of the map projection space in the graphics window.
   The default position is [0.075, 0.075, 0.925, 0.900].
xlog: in, optional, type=boolean, default=0
   Set this keyword if you wish the X axis range to be logarithmic.
ylog: in, optional, type=boolean, default=0
   Set this keyword if you wish the Y axis range to be logarithmic.
xrange: in, optional, type=various
   Set this keyword to the X axis range desired in the data coordinate system.
   The default os [0,1].
yrange: in, optional, type=various
   Set this keyword to the Y axis range desired in the data coordinate system.
   The default os [0,1].
_ref_extra: in, optional, type=various
    Any keywords appropriate for superclass objects can also be specified.
s method sets up the data coordinate space of the object by drawing
"invisible" plot.
s method allows the user to get various properties of the object. In general,
 same keywords that are used for the INIT method can be used here.
s method allows the user to set various properties of the object. In general,
 same keywords that are used for the INIT method can be used here.
s is the clean-up routine for the object.
s is the class definition module. 
Params
class: out, optional, type=structure
   Occasionally, it is useful to have an object class definition as
   a structure variable. Using this output keyword will allow that.