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MGHGRCOMPOSITEEXAMPLE__DEFINE

MGHGRCOMPOSITEEXAMPLE__DEFINE

Class Name


  MGHgrCompositeExample

Purpose


  This class was written as a prototype for a typical composite graphics
  object. It implements a grey rectangle with a black outline. It has
  properties LOCATION and DIMENSIONS. It has no practical use.

Category


  Object graphics.

Superclasses


  This class inherits from IDLgrModel.

Properties


  The following properties are supported:
    DELTAZ (Init,Get,Set)
      Vertical spacing in normalised units between the rectangle and the
      outline, needed to ensure the outline is visible. If this property is
      not set, then the spacing is set at draw time, based on the view's
      ZCLIP property--the value is 2*(ZCLIP[0] - ZCLIP[1])/65536, which
      for the default ZCLIP is 6.1E-5. DELTAZ should only need to be
      set explicitly if the object or its parent is transformed before
      drawing.
    LOCATION (Init,Get,Set)
      Location of the lower left corner of the rectangle in data units.
    DIMENSIONS (Init,Get,Set)
      Horizontal & vertical dimensions of the rectangle in data units.
    XCOORD_CONV (Init,Get,Set)
    YCOORD_CONV (Init,Get,Set)
    ZCOORD_CONV (Init,Get,Set)
      Coordinate transformations specifying the relationship between
      normalised & data units.
    XRANGE (Get)
    YRANGE (Get)
    ZRANGE (Get)
      Position of the extremes of the object in data units. ZRANGE is
      not finalised until the object is drawn.

Methods


  The usual.
###########################################################################
  This software is provided subject to the following conditions:
  1. NIWA makes no representations or warranties regarding the
    accuracy of the software, the use to which the software may
    be put or the results to be obtained from the use of the
    software. Accordingly NIWA accepts no liability for any loss
    or damage (whether direct of indirect) incurred by any person
    through the use of or reliance on the software.
  2. NIWA is to be acknowledged as the original author of the
    software where the software is used or presented in any form.
###########################################################################

Modification History


  Mark Hadfield, 1998-08:
    Written.
  Mark Hadfield, 2004-03:
    Overhauled keyword handling and updated for IDL 6.0.
  Mark Hadfield, 2004-07:
    Added support for property registration.



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