Complete the UI for the battery

shell/model/devices/battery.py

@@ -1,11 +1,20 @@
+import gobject
+
 from model.devices import device
 
 class Device(device.Device):
+    __gproperties__ = {
+        'level' : (int, None, None, 0, 100, 0,
+                   gobject.PARAM_READABLE)
+    }
+
     def __init__(self):
         device.Device.__init__(self)
+        self._level = 0
+
+    def do_get_property(self, pspec):
+        if pspec.name == 'level':
+            return self._level 
 
     def get_type(self):
         return 'battery'
-
-    def get_level(self):
-        return 0

shell/model/devices/devicesmodel.py

@@ -21,7 +21,7 @@ class DevicesModel(gobject.GObject):
         gobject.GObject.__init__(self)
 
         self._devices = {}
-        #self.add_device(battery.Device())
+        self.add_device(battery.Device())
 
         self._observe_network_manager()
 

shell/view/devices/battery.py

@@ -7,5 +7,14 @@ class DeviceView(canvasicon.CanvasIcon):
         canvasicon.CanvasIcon.__init__(self)
         self._model = model
 
-        icon_name = canvasicon.get_icon_state(_ICON_NAME, 60)
-        self.props.icon_name = icon_name
+        model.connect('notify::strength', self._level_changed_cb)
+
+        self._update_level()
+
+    def _update_level(self):
+        self.props.icon_name = canvasicon.get_icon_state(
+                                    _ICON_NAME, self._model.props.level)
+
+    def _level_changed_cb(self, pspec):
+        self._update_level()
+