# 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 .
from urwid import (
ACTIVATE,
AttrWrap,
connect_signal,
LineBox,
PopUpLauncher,
SelectableIcon,
Text,
WidgetWrap,
)
from subiquitycore.ui.container import ListBox
class _PopUpButton(SelectableIcon):
"""It looks a bit like a radio button, but it just emits 'click' on activation."""
signals = ['click']
states = {
True: "(+) ",
False: "( ) ",
}
def __init__(self, option, state):
p = self.states[state]
super().__init__(p + option, len(p))
def keypress(self, size, key):
if self._command_map[key] != ACTIVATE:
return key
self._emit('click')
class _PopUpSelectDialog(WidgetWrap):
"""A list of PopUpButtons with a box around them."""
def __init__(self, parent, cur_index):
self.parent = parent
group = []
for i, option in enumerate(self.parent._options):
if option.enabled:
btn = _PopUpButton(option.label, state=i==cur_index)
connect_signal(btn, 'click', self.click, i)
group.append(AttrWrap(btn, 'menu_button', 'menu_button focus'))
else:
btn = Text(" " + option.label)
group.append(AttrWrap(btn, 'info_minor'))
list_box = ListBox(group)
list_box.base_widget.focus_position = cur_index
super().__init__(LineBox(list_box))
def click(self, btn, index):
self.parent.index = index
self.parent.close_pop_up()
def keypress(self, size, key):
if key == 'esc':
self.parent.close_pop_up()
else:
return super().keypress(size, key)
class SelectorError(Exception):
pass
class Option:
def __init__(self, val):
if not isinstance(val, tuple):
if not isinstance(val, str):
raise SelectorError("invalid option %r", val)
self.label = val
self.enabled = True
self.value = val
elif len(val) == 1:
self.label = val[0]
self.enabled = True
self.value = val[0]
elif len(val) == 2:
self.label = val[0]
self.enabled = val[1]
self.value = val[0]
elif len(val) == 3:
self.label = val[0]
self.enabled = val[1]
self.value = val[2]
else:
raise SelectorError("invalid option %r", val)
class Selector(PopUpLauncher):
"""A widget that allows the user to chose between options by popping up a list of options.
(A bit like