old_contents: # Copyright 2017 Canonical, Ltd.
  #
  # This program is free software: you can redistribute it and/or modify
  # it under the terms of the GNU Affero General Public License as
  # published by the Free Software Foundation, either version 3 of the
  # License, or (at your option) any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU Affero General Public License for more details.
  #
  # You should have received a copy of the GNU Affero General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  from urwid import AttrMap, Button, Text
  
  
  def _stylized_button(left, right, style):
      class Btn(Button):
          button_left = Text(left)
          button_right = Text(right)
  
      class StyleAttrMap(AttrMap):
          def __init__(self, label, on_press=None, user_arg=None):
              btn = Btn(label, on_press=on_press, user_data=user_arg)
              super().__init__(btn, style + '_button', style + '_button focus')
      return StyleAttrMap
  
  
  def action_button(style):
      return _stylized_button('[', ']', style)
  
  
  menu_btn = _stylized_button("", ">", "menu")
  forward_btn = _stylized_button("", ">", "done")
  done_btn = action_button("done")
  danger_btn = action_button("danger")
  other_btn = action_button("other")
  
  ok_btn = done_btn
  
  delete_btn = danger_btn
  
  back_btn = other_btn
  cancel_btn = other_btn
  reset_btn = other_btn
  
new_contents: # Copyright 2017 Canonical, Ltd.
  #
  # This program is free software: you can redistribute it and/or modify
  # it under the terms of the GNU Affero General Public License as
  # published by the Free Software Foundation, either version 3 of the
  # License, or (at your option) any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU Affero General Public License for more details.
  #
  # You should have received a copy of the GNU Affero General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  from urwid import AttrMap, Button, Text
  
  
  def _stylized_button(left, right, style):
      class Btn(Button):
          button_left = Text(left)
          button_right = Text(right)
  
      class StyleAttrMap(AttrMap):
          def __init__(self, label, on_press=None, user_arg=None):
              btn = Btn(label, on_press=on_press, user_data=user_arg)
              btn._w.contents[2] = (
                  btn._w.contents[2][0],
                  btn._w.options('given', len(right)))
              super().__init__(btn, style + '_button', style + '_button focus')
      return StyleAttrMap
  
  
  def action_button(style):
      return _stylized_button('[', ']', style)
  
  
  _forward_rhs = "\N{BLACK RIGHT-POINTING SMALL TRIANGLE} ]"
  
  menu_btn = _stylized_button("[", _forward_rhs, "menu")
  forward_btn = _stylized_button("[", _forward_rhs, "done")
  
  done_btn = action_button("done")
  danger_btn = action_button("danger")
  other_btn = action_button("other")
  
  ok_btn = done_btn
  
  delete_btn = danger_btn
  
  back_btn = other_btn
  cancel_btn = other_btn
  reset_btn = other_btn
  
subject: change " menu >" to "[ menu ▸ ]"