old_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2015 Alexander Fasching
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  
  from . import base
  from .. import bar, hook
  
  
  class CurrentScreen(base._TextBox):
      """
          Indicates whether the screen this widget is on is currently active
          or not.
      """
  
      defaults = [
          ('active_text', 'A', 'Text displayed when the screen is active'),
          ('inactive_text', 'I', 'Text displayed when the screen is inactive'),
          ('active_color', '00ff00', 'Color when screen is active'),
          ('inactive_color', 'ff0000', 'Color when screen is inactive')
      ]
      orientations = base.ORIENTATION_HORIZONTAL
  
      def __init__(self, width=bar.CALCULATED, **config):
          base._TextBox.__init__(self, "", width, **config)
          self.add_defaults(CurrentScreen.defaults)
  
      def _configure(self, qtile, bar):
          base._TextBox._configure(self, qtile, bar)
          if qtile.currentScreen == bar.screen:
              self.text = self.active_text
              self.foreground = self.active_color
          else:
              self.text = self.inactive_text
              self.foreground = self.inactive_color
  
          self.setup_hooks()
  
      def setup_hooks(self):
          def hook_response():
              if self.qtile.currentScreen == self.bar.screen:
                  self.text = self.active_text
                  self.foreground = self.active_color
              else:
                  self.text = self.inactive_text
                  self.foreground = self.inactive_color
              self.bar.draw()
  
          hook.subscribe.current_screen_change(hook_response)
  
new_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2015 Alexander Fasching
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  
  from . import base
  from .. import bar, hook
  
  
  class CurrentScreen(base._TextBox):
      """
          Indicates whether the screen this widget is on is currently active
          or not.
      """
  
      defaults = [
          ('active_text', 'A', 'Text displayed when the screen is active'),
          ('inactive_text', 'I', 'Text displayed when the screen is inactive'),
          ('active_color', '00ff00', 'Color when screen is active'),
          ('inactive_color', 'ff0000', 'Color when screen is inactive')
      ]
      orientations = base.ORIENTATION_HORIZONTAL
  
      def __init__(self, width=bar.CALCULATED, **config):
          base._TextBox.__init__(self, "", width, **config)
          self.add_defaults(CurrentScreen.defaults)
  
      def _configure(self, qtile, bar):
          base._TextBox._configure(self, qtile, bar)
          self.update_text()
          self.setup_hooks()
  
      def setup_hooks(self):
          def hook_response():
              self.update_text()
              self.bar.draw()
  
          hook.subscribe.current_screen_change(hook_response)
  
      def update_text(self):
          if self.qtile.currentScreen == self.bar.screen:
              self.text = self.active_text
              self.foreground = self.active_color
          else:
              self.text = self.inactive_text
              self.foreground = self.inactive_color
  
subject: update function