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GETKEY

GETKEY

Name


      GETKEY

Purpose


      Return a keyboard key. Interpret escape sequences.

Category


Calling Sequence


      k = getkey()

Inputs


Keyword Parameters


Keywords


        /INIT initializes internal lookup tables, should never
          be needed but once was. If arrow keys or other such
          escape sequence keys gives wrong value try /INIT.

Outputs


      k = key string. Actual key or key name. out
          Waits for a key. No type ahead allowed.

Common Blocks


      getkey_com

Notes


      Notes: Key is returned as a string. Keys that produce
        escape sequences are interpreted and returned as a single
        string. For example the F2 key returns 'F2', the right
        arrow key returns 'RIGHT', and so on. Not all keys return
        something. To find what a key returns do print,getkey()
        and press the desired key.
        Has problems if there is a pause between calls to getkey.
        Tries to handle problems but cannot always do so. Its
        best to type slowly when there are pauses between calls,
        like for computations, etc.

Modification History


      R. Sterner, 8 Nov, 1989
      R. Sterner, 18 Apr, 1990 --- major rewrite.
      R. Sterner, 2010 May 07 --- Converted arrays from () to [].
  Copyright (C) 1989, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.



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