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# Copyright (C) 2006-2007, Red Hat, Inc.
# Copyright (C) 2009 One Laptop Per Child
# Author: Sayamindu Dasgupta <sayamindu@laptop.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import gtk
import gobject
import dbus
import logging
from sugar.graphics import style
from sugar.graphics.icon import Icon, get_icon_state
from gettext import gettext as _
_ICON_NAME = 'battery'
_UP_DEVICE_IFACE = 'org.freedesktop.UPower.Device'
_UP_TYPE_BATTERY = 2
class _TopBar(gtk.HBox):
__gproperties__ = {
'completion-level': (float, None, None, 0.0, 100.0, 0.0,
gobject.PARAM_READWRITE),
}
def __init__(self):
gtk.HBox.__init__(self)
self.set_border_width(int(style.DEFAULT_SPACING / 2.0))
self.set_spacing(style.DEFAULT_SPACING * 4)
self._completion_level = 0
self._progressbar = None
self._icon = None
self._battery_props = None
try:
bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM)
up_proxy = bus.get_object('org.freedesktop.UPower',
'/org/freedesktop/UPower')
upower = dbus.Interface(up_proxy, 'org.freedesktop.UPower')
for device_path in upower.EnumerateDevices():
device = bus.get_object('org.freedesktop.UPower', device_path)
device_prop_iface = dbus.Interface(device,
dbus.PROPERTIES_IFACE)
device_type = device_prop_iface.Get(_UP_DEVICE_IFACE, 'Type')
if device_type != _UP_TYPE_BATTERY:
continue
device.connect_to_signal('Changed',
self.__battery_properties_changed_cb,
dbus_interface=_UP_DEVICE_IFACE)
self._battery_props = dbus.Interface(device,
dbus.PROPERTIES_IFACE)
break
except dbus.DBusException:
logging.warning("Could not connect to UPower, won't show battery"
"level.")
self._setup()
def do_get_property(self, property):
if property.name == 'completion-level':
return self._completion_level
else:
raise AttributeError('unknown property %s' % property.name)
def do_set_property(self, property, value):
if property.name == 'completion-level':
self.set_completion_level(value)
else:
raise AttributeError('unknown property %s' % property.name)
def set_completion_level(self, value):
self._completion_level = value
self._progressbar.set_fraction(self._completion_level / 100.0)
def _get_battery_level(self):
try:
return self._battery_props.Get(_UP_DEVICE_IFACE,
'Percentage')
except dbus.DBusException:
logging.exception('Error determining battery level:')
return 0
def _setup(self):
self._progressbar = gtk.ProgressBar()
self._progressbar.props.discrete_blocks = 10
self._progressbar.set_fraction(self._completion_level / 100.0)
self.pack_start(self._progressbar, expand=True, fill=True)
if self._battery_props is None:
return
level = self._get_battery_level()
icon_name = get_icon_state(_ICON_NAME, level, step=-5)
self._icon = Icon(icon_name=icon_name)
self.pack_start(self._icon, expand=False, fill=False)
def __battery_properties_changed_cb(self):
level = self._get_battery_level()
icon_name = get_icon_state(_ICON_NAME, level, step=-5)
self._icon.props.icon_name = icon_name
class TopBar(_TopBar):
def __init__(self):
_TopBar.__init__(self)
self._view = None
def set_view(self, view):
self._view = view
self._view.connect_page_changed_handler(self._page_changed_cb)
def _page_changed_cb(self, model, page_from, page_to):
current_page = self._view.get_current_page()
n_pages = self._view.get_pagecount()
completion_level = int(float(current_page) * 100 / float(n_pages))
self.set_completion_level(completion_level)
#TRANS: Translate this as Page i of m (eg: Page 4 of 334)
self._progressbar.set_text(
_("Page %(current)i of %(total_pages)i") %
{'current': current_page, 'total_pages': n_pages})
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