#!/usr/bin/env python
#
# Copyright (C) 2011 by Yu-Jie Lin
#
# 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.


import urwid


class MyBigText(urwid.BigText):

  _selectable = True
  signals = ['keypress', 'mouse_event']

  def keypress(self, size, key):

    # self._emit(), i.e. Widget._emit(), does not handle/return return value of
    # event handler.
    if urwid.emit_signal(self, 'keypress', self, size, key):
      return key

  def mouse_event(self, *args):

    self._emit('mouse_event', *args)
    return True


def main():

  TEXT = 'MyBigText [F10 to Quit]'

  palette = [
      ('bigtext', 'white', 'dark gray'),
      ('bigtext focus', 'light red', 'white'),
      ('listbox header', 'light blue', 'dark green'),
      ('listbox', 'white', 'dark gray'),
      ('listbox focus', 'light red', 'white'),
      ]

  def event_handler(w, *args):

    if args[1] == 'f10':
      return True
    btevts.append(urwid.Text(repr(args)))
    btevts.set_focus(len(btevts) - 1)

  def unhandled_input(inp):

    if inp == 'f10':
      raise urwid.ExitMainLoop
    uhevts.append(urwid.Text(repr(inp)))
    uhevts.set_focus(len(uhevts) - 1)

  font = urwid.HalfBlock5x4Font()
  btxt = MyBigText(TEXT, font)
  urwid.connect_signal(btxt, 'keypress', event_handler)
  urwid.connect_signal(btxt, 'mouse_event', event_handler)

  try:
    if urwid.AttrMap.pack.__func__ is urwid.Widget.pack.__func__:
      urwid.AttrMap.pack = property(lambda self:self._original_widget.pack)
  except:
    pass

  btxt = urwid.AttrMap(btxt, 'bigtext', 'bigtext focus')

  btxt_p = urwid.Padding(btxt, width='clip')
  btxt_f = urwid.Filler(btxt_p, height=font.height)

  btevts = urwid.SimpleListWalker([])
  uhevts = urwid.SimpleListWalker([])

  pile = urwid.Pile([
      ('fixed', font.height, btxt_f),
      ('fixed', 1, urwid.AttrMap(urwid.Filler(urwid.Text('MyBigText Events')), 'listbox header')),
      ('weight', 1, urwid.AttrMap(urwid.ListBox(btevts), 'listbox', 'listbox focus')),
      ('fixed', 1, urwid.AttrMap(urwid.Filler(urwid.Text('Unhandled Events')), 'listbox header')),
      ('weight', 1, urwid.AttrMap(urwid.ListBox(uhevts), 'listbox', 'listbox focus')),
      ])

  loop = urwid.MainLoop(pile, palette=palette, unhandled_input=unhandled_input)
  loop.run()


if __name__ == '__main__':
  main()