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SUBCELL

SUBCELL

Name


  SUBCELL

Author


  Craig B. Markwardt, NASA/GSFC Code 662, Greenbelt, MD 20770
  craigm@lheamail.gsfc.nasa.gov

Purpose


  Finds the position of a subwindow within a reference window.

Calling Sequence


  sub = subcell(panel, refposition)

Description



  SUBCELL finds the position of a subwindow within another window.
  This could be useful in cases where the position of one window is
  specified relative to another one.
  When plotting, one often wants to describe the position of the
  plot box with respect to another box on the screen. In that
  respect, the reference window can be thought of as a virtual
  display, and the SUBPOS as virtual a position on that display.
  The SUBCELL function transforms the relative coordinates of the
  virtual position back to normal screen coordinates.

Inputs



  SUBPOS - A four-element array giving the position of the
            subwindow, *relative* to a reference window given by
            POSITION. Given as [XS1, YS1, XS2, YS2], which describes
            the lower left and upper right corners of the subwindow.
            Each value is a number between zero and one, zero being
            the lower/left and one being the upper/right corners of
            the reference window.
  POSITION - A four-element array giving the position of the
              reference window on the screen. Equivalent to the
              graphics keyword of the same name.
 

Optional Inputs


  NONE

Input Keyword Parameters



  MARGIN - If set, then a default value for SUBPOS is found using
            the DEFSUBCELL function.

Returns


  The position of the subwindow, in normal coordinates.

Procedure


Example


See Also



  DEFSUBCELL, SUBCELLARRAY
  EXTERNAL SUBROUTINES:
  DEFSUBCELL

Modification History


  Written, CM, 1997
  Added copyright notice, 25 Mar 2001, CM
  $Id: subcell.pro,v 1.2 2001/03/25 18:54:31 craigm Exp $



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