text: # ----------------------------------------------------------------------------
  # pyglet
  # Copyright (c) 2006-2008 Alex Holkner
  # Copyright (c) 2008-2019 pyglet contributors
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  #
  #  * Redistributions of source code must retain the above copyright
  #    notice, this list of conditions and the following disclaimer.
  #  * Redistributions in binary form must reproduce the above copyright
  #    notice, this list of conditions and the following disclaimer in
  #    the documentation and/or other materials provided with the
  #    distribution.
  #  * Neither the name of pyglet nor the names of its
  #    contributors may be used to endorse or promote products
  #    derived from this software without specific prior written
  #    permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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  # POSSIBILITY OF SUCH DAMAGE.
  # ----------------------------------------------------------------------------
  
  """Mouse constants and utilities for pyglet.window.
  """
  __docformat__ = 'restructuredtext'
  __version__ = '$Id$'
  
  
  def buttons_string(buttons):
      """Return a string describing a set of active mouse buttons.
  
      Example::
  
          >>> buttons_string(LEFT | RIGHT)
          'LEFT|RIGHT'
  
      :Parameters:
          `buttons` : int
              Bitwise combination of mouse button constants.
  
      :rtype: str
      """
      button_names = []
      if buttons & LEFT:
          button_names.append('LEFT')
      if buttons & MIDDLE:
          button_names.append('MIDDLE')
      if buttons & RIGHT:
          button_names.append('RIGHT')
      return '|'.join(button_names)
  
  # Symbolic names for the mouse buttons
  LEFT =   1 << 0
  MIDDLE = 1 << 1
  RIGHT =  1 << 2
  