[Deskbar] Tracker handler updated

I updated the deskbar tracker handler to the "new" tracker api. This should be compatible with both the current tracker version (0.0.3) and the very soon to come 0.0.4.

import deskbar
from deskbar.Handler import SignallingHandler
from deskbar.Match import Match
import gobject
from gettext import gettext as _

def _check_requirements ():
		import dbus
		try :
			if getattr(dbus, 'version', (0,0,0)) >= (0,41,0):
				import dbus.glib
			return (deskbar.Handler.HANDLER_IS_NOT_APPLICABLE, "Python dbus.glib bindings not found.", None)
		return (deskbar.Handler.HANDLER_IS_HAPPY, None, None)
		return (deskbar.Handler.HANDLER_IS_NOT_APPLICABLE, "Python dbus bindings not found.", None)
	"TrackerFileSearchHandler" : {
		"name": "Search for files using Tracker",
		"description": _("Search all of your documents (using Tracker), as you type"),
		"requirements" : _check_requirements,

class TrackerFileMatch (Match):
	def __init__(self, handler, **args):
		Match.__init__ (self, handler, **args)
			self._icon = deskbar.Utils.load_icon_for_file(self.name)
		except Exception:
	def get_verb(self):
		return "%(name)s"
	def action(self, text=None):
		print "Opening Tracker hit:", self.name
		args = ["gnome-open", str(self.name)] # FIXME for some odd reason we need the str() cast
		gobject.spawn_async(args, flags=gobject.SPAWN_SEARCH_PATH)
	def get_category (self):
		return "files"

class TrackerFileSearchHandler(SignallingHandler):
	def __init__(self):
		SignallingHandler.__init__(self, "stock_file")
		import dbus
		# We have to do this or it won't work
		if getattr(dbus, 'version', (0,0,0)) >= (0,41,0):
			import dbus.glib

		# Set up dbus conenction to trackerd
		self.bus = dbus.SessionBus()
		self.proxy_obj = self.bus.get_object('org.freedesktop.Tracker', '/org/freedesktop/tracker')
		self.tracker_iface = dbus.Interface(self.proxy_obj, 'org.freedesktop.Tracker')
		self.set_delay (500)
	def query (self, qstring, max):		
		self.tracker_iface.SearchMetadataText ("Files", qstring, 100, False, reply_handler=lambda hits : self.__recieve_hits(qstring, hits, max), error_handler=self.__recieve_error)
		print "Tracker query:", qstring

	def __recieve_hits (self, qstring, hits, max):
		matches = []
		for filename in hits:
			matches.append( TrackerFileMatch(self, name=filename) )
			if len (matches) > max:
		self.emit_query_ready(qstring, matches)
		print "Tracker response for %s, - %s hits returned, %s shown" % (qstring, len(hits), len(matches))
	def __recieve_error (self, error):
		print "*** Tracker dbus error:", error
	def stop_query(self):

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