TODO

Add default view format to config.py for io.view()

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NOTE: the methods below should all be in input_mask() form, right? We're moving away from camelCaps. 

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Implement __eq__ on _HPGL

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Write more examples!

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Write more tests!!

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The following HPGL commands are pending:

         
   def inputMask(e = 233, s = 0, p = 0):
      """
         Set masks for Error LED, Status byte, and Positive serial poll.
         Whatever.
      """
      return 'IM%d,%d,%d%s' % (e, s, p, TERMINATOR)

   def invokeCharSlant(slot = 0, left = None):
      if left:
         return 'IV%d,%d%s' % (slot, left)
      else:
         return 'IV%d%d' % (slot, TERMINATOR)

   def defineKey(key = None, function = None):
      if key:
         if function:
            return 'KY%d,%d%s' % (key, function, TERMINATOR)
         else:
            return 'KY%d%s' % (key, TERMINATOR)
      else:
         return 'KY%s' % (TERMINATOR)


   def escapeSetPlotterConfiguration(maxBufSize, dtrControl):
      """
         Enables or disables hardwire handshake mode, monitor mode,
         and data transmission mode.
         
         maxBufSize: sets maximum buffer size
         dtrControl: Data Terminal Ready (CD) line contro. 
            A number in the range of 0-31
            
         WTF???
      """
      return "%c.@[(%d);(%d)];" % (chr(27), maxBufSize, dtrControl)

   def escapeXoff(char='19', interchar_speed=0):
      """DCI that tells the plotter what the Xoff character will be."""
      return chr(27) + '.N' + str(interchar_speed) + ';' + str(char) + ':'

   def escapeHS2(minbytes=81, xon='17' ):
      """Set hand shake mode 2."""
      return chr(27) + '.I' + str(minbytes) + ';' + ';' + str(xon) + ':'