subiquity/subiquity/installpath/__init__.py

# 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/>.

""" Install Path

Provides high level options for Ubuntu install

"""
import logging
from urwid import (WidgetWrap, ListBox, Pile, BoxAdapter, emit_signal)
from subiquity.ui.lists import SimpleList
from subiquity.ui.buttons import confirm_btn, cancel_btn
from subiquity.ui.utils import Padding, Color

log = logging.getLogger('subiquity.installpathView')


class InstallpathModel:
    """ Model representing install options
    """

    install_paths = ['Install Ubuntu',
                     'Install MAAS Region Server',
                     'Install MAAS Cluster Server',
                     'Test installation media',
                     'Test machine memory']
    selected_path = None


class InstallpathView(WidgetWrap):
    def __init__(self, model, signal):
        log.debug("In install path view")
        self.model = model
        self.signal = signal
        self.items = []
        self.body = [
            Padding.center_79(self._build_model_inputs()),
            Padding.line_break(""),
            Padding.center_20(self._build_buttons()),
        ]
        super().__init__(ListBox(self.body))

    def _build_buttons(self):
        self.buttons = [
            Color.button_secondary(cancel_btn(on_press=self.cancel),
                                   focus_map='button_secondary focus'),
        ]
        return Pile(self.buttons)

    def _build_model_inputs(self):
        sl = []
        for ipath in self.model.install_paths:
            sl.append(Color.button_primary(confirm_btn(label=ipath,
                                                       on_press=self.confirm),
                                           focus_map='button_primary focus'))

        return BoxAdapter(SimpleList(sl),
                          height=len(sl))

    def confirm(self, button):
        emit_signal(self.signal, 'installpath:finish', button.label)

    def cancel(self, button):
        emit_signal(self.signal, 'welcome:show', None)