examples: update python examples

Update the raw D-Bus python examples to use newer APIs where
appropriate (and split the add-connection example into 1.0-only and
0.9-compatible versions). Update the gi-based python examples for the
various API changes since they were last updated.

Also add a comment to the ruby add-connection example pointing out
that it's still using the old settings APIs.

examples/python/gi/show-wifi-networks.py

@@ -20,6 +20,7 @@
 # Copyright (C) 2013 Red Hat, Inc.
 #
 
+import locale
 from gi.repository import NM
 
 #
@@ -31,22 +32,20 @@ from gi.repository import NM
 # an error without it: http://www.python.org/dev/peps/pep-0263/
 #
 
-signal_bars = {
-    0 : "____",
-    1 : "▂___",
-    2 : "▂▄__",
-    3 : "▂▄▆_",
-    4 : "▂▄▆█"
-}
-
 def clamp(value, minvalue, maxvalue):
     return max(minvalue, min(value, maxvalue))
 
+def ssid_to_utf8(ap):
+    ssid = ap.get_ssid()
+    if not ssid:
+        return ""
+    return NM.utils_ssid_to_utf8(ap.get_ssid().get_data())
+
 def print_device_info(device):
     active_ap = dev.get_active_access_point()
     ssid = None
     if active_ap is not None:
-        ssid = active_ap.get_ssid()
+        ssid = ssid_to_utf8(active_ap)
     info = "Device: %s | Driver: %s | Active AP: %s" % (dev.get_iface(), dev.get_driver(), ssid)
     print info
     print '=' * len(info)
@@ -54,14 +53,19 @@ def print_device_info(device):
 def print_ap_info(ap):
     strength = ap.get_strength()
     frequency = ap.get_frequency()
-    print "SSID:      %s"      % (ap.get_ssid())
+    print "SSID:      %s"      % (ssid_to_utf8(ap))
     print "BSSID:     %s"      % (ap.get_bssid())
     print "Frequency: %s"      % (frequency)
     print "Channel:   %s"      % (NM.utils_wifi_freq_to_channel(frequency))
-    print "Strength:  %s %s%%" % (signal_bars[(clamp(strength-5, 0, 99)+24)/25], strength)
+    print "Strength:  %s %s%%" % (NM.utils_wifi_strength_bars(strength), strength)
     print
 
 if __name__ == "__main__":
+    # Python apparently doesn't call setlocale() on its own? We have to call this or else
+    # NM.utils_wifi_strength_bars() will think the locale is ASCII-only, and return the
+    # fallback characters rather than the unicode bars
+    locale.setlocale(locale.LC_ALL, '')
+
     nmc = NM.Client.new(None)
     devs = nmc.get_devices()