Add a information bar on top during full screen view.

1 files changed, 204 insertions, 0 deletions

diff --git a/readtopbar.py b/readtopbar.py
new file mode 100644
index 0000000..3f338f5
--- /dev/null
+++ b/readtopbar.py
@@ -0,0 +1,204 @@
+# 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, gobject
+import dbus
+
+from sugar.graphics import style
+from sugar.graphics.icon import Icon, get_icon_state
+
+from gettext import gettext as _
+
+_LEVEL_PROP = 'battery.charge_level.percentage'
+_CHARGING_PROP = 'battery.rechargeable.is_charging'
+_DISCHARGING_PROP = 'battery.rechargeable.is_discharging'
+_PRESENT_PROP = 'battery.present'
+
+_ICON_NAME = 'battery'
+
+# Taken from sugar/extensions/deviceicon/battery.py
+class BattMan(gobject.GObject):
+    __gproperties__ = {
+        'level'       : (int, None, None, 0, 100, 0,
+                         gobject.PARAM_READABLE),
+        'charging'    : (bool, None, None, False,
+                         gobject.PARAM_READABLE),
+        'discharging' : (bool, None, None, False,
+                         gobject.PARAM_READABLE),
+        'present'     : (bool, None, None, False,
+                         gobject.PARAM_READABLE)
+    }
+
+    def __init__(self, udi):
+        gobject.GObject.__init__(self)
+        
+        bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM)
+        proxy = bus.get_object('org.freedesktop.Hal', udi,
+                               follow_name_owner_changes=True)
+        self._battery = dbus.Interface(proxy, 'org.freedesktop.Hal.Device')
+        bus.add_signal_receiver(self._battery_changed,
+                                'PropertyModified',
+                                'org.freedesktop.Hal.Device',
+                                'org.freedesktop.Hal',
+                                udi)
+
+        self._level = self._get_level()
+        self._charging = self._get_charging()
+        self._discharging = self._get_discharging()
+        self._present = self._get_present()
+
+    def _get_level(self):
+        try:
+            return self._battery.GetProperty(_LEVEL_PROP)
+        except dbus.DBusException:
+            logging.error('Cannot access %s' % _LEVEL_PROP)
+            return 0
+
+    def _get_charging(self):
+        try:
+            return self._battery.GetProperty(_CHARGING_PROP)
+        except dbus.DBusException:
+            logging.error('Cannot access %s' % _CHARGING_PROP)
+            return False
+
+    def _get_discharging(self):
+        try:
+            return self._battery.GetProperty(_DISCHARGING_PROP)
+        except dbus.DBusException:
+            logging.error('Cannot access %s' % _DISCHARGING_PROP)
+            return False
+
+    def _get_present(self):
+        try:
+            return self._battery.GetProperty(_PRESENT_PROP)
+        except dbus.DBusException:
+            logging.error('Cannot access %s' % _PRESENT_PROP)
+            return False
+
+    def do_get_property(self, pspec):
+        if pspec.name == 'level':
+            return self._level 
+        if pspec.name == 'charging':
+            return self._charging
+        if pspec.name == 'discharging':
+            return self._discharging
+        if pspec.name == 'present':
+            return self._present
+
+    def get_type(self):
+        return 'battery'
+
+    def _battery_changed(self, num_changes, changes_list):
+        for change in changes_list:
+            if change[0] == _LEVEL_PROP:
+                self._level = self._get_level()
+                self.notify('level')
+            elif change[0] == _CHARGING_PROP:
+                self._charging = self._get_charging()
+                self.notify('charging')
+            elif change[0] == _DISCHARGING_PROP:
+                self._discharging = self._get_discharging()
+                self.notify('discharging')
+            elif change[0] == _PRESENT_PROP:
+                self._present = self._get_present()
+                self.notify('present')
+
+
+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
+
+        bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM)
+        proxy = bus.get_object('org.freedesktop.Hal',
+                                '/org/freedesktop/Hal/Manager')
+        hal_manager = dbus.Interface(proxy, 'org.freedesktop.Hal.Manager')
+        udis = hal_manager.FindDeviceByCapability('battery')
+        if len(udis) > 0:
+            self._battery = BattMan(udis[0]) # TODO: Support more than one battery
+            self._battery.connect('notify::level', \
+                self._battery_level_changed_cb)
+        else:
+            self._battery = None
+
+        self._icon = None
+
+        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 _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 is not None:
+            icon_name = get_icon_state(_ICON_NAME, self._battery.props.level, step=-5)
+            self._icon = Icon(icon_name=icon_name)
+            self.pack_start(self._icon, expand = False, fill = False) 
+
+    def _battery_level_changed_cb(self, pspec, param):
+        icon_name = get_icon_state(_ICON_NAME, self._battery.props.level, step=-5)
+        self._icon.props.icon_name = icon_name
+
+class TopBar(_TopBar):
+    def __init__(self):
+        _TopBar.__init__(self)
+        self._document = None
+
+    def set_document(self, document):
+        self._document = document
+
+        page_cache = self._document.get_page_cache()
+        page_cache.connect('page-changed', self._page_changed_cb)
+
+    def _page_changed_cb(self, page, proxy = None):
+        current_page = self._document.get_page_cache().get_current_page()
+        n_pages = self._document.get_n_pages()
+
+        self.set_completion_level(current_page * 100/n_pages)
+
+        #TRANS: Translate this as Page i of m (eg: Page 4 of 334)
+        self._progressbar.set_text(_("Page %i of %i") % (current_page, n_pages))
+        
+        
+