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# Copyright 2015 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/>.
""" View policy
Contains some default key navigations
"""
from urwid import Overlay, WidgetWrap
class BaseView(WidgetWrap):
def show_overlay(self, overlay_widget, **kw):
self.orig_w = self._w
args = dict(
align='center',
width=('relative', 60),
min_width=80,
valign='middle',
height='pack'
)
args.update(kw)
self._w = Overlay(top_w=overlay_widget, bottom_w=self._w, **args)
def remove_overlay(self):
self._w = self.orig_w
self.orig_w = None
def keypress(self, size, key):
if key in ['ctrl x']:
self.controller.signal.emit_signal('control-x-quit')
return None
key = super().keypress(size, key)
if key == 'esc':
self.controller.cancel()
return None
return key
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