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import gobject
import gconf
## Please take note of this important restriction: all keys in the
## gconf dir being monitored must have a corresponding schema default,
## or else this might break
class GConfSync(gobject.GObject):
__gsignals__ = {
'changed': (gobject.SIGNAL_RUN_LAST|gobject.SIGNAL_DETAILED,
None, # return type
(str, )) # parameter types
}
def __init__(self, prefix, enums={}):
gobject.GObject.__init__(self)
self.prefix = prefix
gc = gconf.client_get_default()
keys = dict() # mapping key -> type
for entry in gc.all_entries(prefix):
assert entry.key[:len(prefix)] == prefix
keyname = entry.key[len(prefix):].lstrip('/')
keys[keyname] = entry.value.type
self.valid_keys = keys
self.__key_just_been_set = None
self.enums_mapping = enums
reverse_map = dict()
for key in enums:
reverse_map[key] = dict(zip(enums[key].values(), enums[key].keys()))
self.enums_reverse_mapping = reverse_map
gc.add_dir(prefix, gconf.CLIENT_PRELOAD_ONELEVEL)
gc.notify_add(prefix, self.__gconfclientnotifyfunc)
def __gconfclientnotifyfunc(self, unused_gc, unused_cnxn_id, entry, unused_user_data):
assert entry.key[:len(self.prefix)] == self.prefix
keyname = entry.key[len(self.prefix):].lstrip('/')
if keyname and keyname != self.__key_just_been_set:
self.emit("changed::" + keyname, keyname)
self.__key_just_been_set = None
def __value_to_python(value):
if value.type == gconf.VALUE_BOOL:
if value.get_bool():
return True
else:
return False
elif value.type == gconf.VALUE_FLOAT:
return value.get_float()
elif value.type == gconf.VALUE_INT:
return value.get_int()
elif value.type == gconf.VALUE_INVALID:
raise ValueError, "GConfValue of invalid type"
elif value.type == gconf.VALUE_LIST:
return map(GConfSync.__value_to_python, value.get_list())
elif value.type == gconf.VALUE_PAIR:
raise NotImplementedError
elif value.type == gconf.VALUE_SCHEMA:
raise NotImplementedError
elif value.type == gconf.VALUE_STRING:
return value.get_string()
else:
return None
__value_to_python = staticmethod(__value_to_python)
def __gconf_get(self, key):
prefix = self.prefix
val = gconf.client_get_default().get("/".join((prefix, key)))
val = self.__value_to_python(val)
if key in self.enums_mapping:
val = self.enums_mapping[key][val]
return val
def __gconf_set(self, key, val):
prefix = self.prefix
gc = gconf.client_get_default()
value_type = self.valid_keys[key]
self.__key_just_been_set = key
if key in self.enums_reverse_mapping:
val = self.enums_reverse_mapping[key][val]
key = '/'.join((prefix, key))
if value_type == gconf.VALUE_BOOL:
gc.set_bool(key, val)
elif value_type == gconf.VALUE_FLOAT:
gc.set_float(key, val)
elif value_type == gconf.VALUE_INT:
gc.set_int(key, val)
elif value_type == gconf.VALUE_INVALID:
raise ValueError, "GConfValue of invalid type"
elif value_type == gconf.VALUE_LIST:
raise NotImplementedError
elif value_type == gconf.VALUE_PAIR:
raise NotImplementedError
elif value_type == gconf.VALUE_SCHEMA:
raise NotImplementedError
elif value_type == gconf.VALUE_STRING:
gc.set_string(key, val)
def __getitem__(self, key):
return self.__gconf_get(key)
def __setitem__(self, key, val):
self.__gconf_set(key, val)
def parse_string(self, key, val):
value_type = self.valid_keys[key]
if value_type == gconf.VALUE_BOOL:
if val.lower() in ('true', 'enable', 'on'):
return True
elif val.lower() in ('false', 'disable', 'off'):
return False
else:
raise ValueError, "unable to parse '%s' as boolean" % val
elif value_type == gconf.VALUE_STRING:
if key in self.enums_mapping:
return self.enums_mapping[key][val]
else:
return val
elif value_type == gconf.VALUE_FLOAT:
return float(val)
elif value_type == gconf.VALUE_INT:
return int(val)
elif value_type == gconf.VALUE_INVALID:
raise ValueError, "GConfValue of invalid type"
elif value_type == gconf.VALUE_LIST:
raise NotImplementedError, "parsing list gconf values not implemented"
elif value_type == gconf.VALUE_PAIR:
raise NotImplementedError, "parsing pair gconf values not implemented"
elif value_type == gconf.VALUE_SCHEMA:
raise NotImplementedError, "parsing schema gconf values not implemented"
raise NotImplementedError, "parsing <unknown> gconf values not implemented"
if gobject.pygtk_version < (2,8):
gobject.type_register(GConfSync)
if __name__ == '__main__':
import gtk, pango
prefs = GConfSync("/apps/gnome-osd",
dict(osd_halignment=dict(left=pango.ALIGN_LEFT,
right=pango.ALIGN_RIGHT,
center=pango.ALIGN_CENTER)))
def osd_font_changed_cb(obj, key):
print "'%s' changed" % key
def osd_halignment_changed_cb(obj, key):
print "'%s' changed" % key
print "new value is ", getattr(prefs, key)
prefs.connect("changed::osd_font", osd_font_changed_cb)
prefs.connect("changed::osd_halignment", osd_halignment_changed_cb)
print "osd font: ", prefs["osd_font"]
prefs["osd_font"] = "Foo bar"
print "osd font (after set): ", prefs['osd_font']
print "osd_halignment is:", prefs['osd_halignment']
print "setting osd_halignment = pango.ALIGN_LEFT"
prefs['osd_halignment'] = pango.ALIGN_LEFT
print "osd_halignment is:", prefs['osd_halignment']
gtk.main()
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