[gnome-control-center] datetime: support new timedated CanNTP property

[Ryan Lortie <ryanl src gnome org>]

commit 8d813defb1fc17bc3c2fd46a5280cd4fe30c209c
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Mar 5 17:24:46 2013 -0500

    datetime: support new timedated CanNTP property
    
    Set the NTP switch insensitive in the case that timedated has a CanNTP
    property and that property is set to false.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=695253

 panels/datetime/cc-datetime-panel.c      |   31 +++++++++++++++++++++++++++++-
 panels/datetime/timedated1-interface.xml |    1 +
 2 files changed, 31 insertions(+), 1 deletions(-)
---
diff --git a/panels/datetime/cc-datetime-panel.c b/panels/datetime/cc-datetime-panel.c
index 84fe007..ef681b8 100644
--- a/panels/datetime/cc-datetime-panel.c
+++ b/panels/datetime/cc-datetime-panel.c
@@ -848,6 +848,30 @@ update_ntp_switch_from_system (CcDateTimePanel *self)
 }
 
 static void
+on_can_ntp_changed (CcDateTimePanel *self)
+{
+  CcDateTimePanelPrivate *priv = self->priv;
+  GtkWidget *switch_widget;
+  gboolean sensitive = TRUE;
+  GVariant *value;
+
+  switch_widget = W("network_time_switch");
+
+  /* We need to access this directly so that we can default to TRUE if
+   * it is not set.
+   */
+  value = g_dbus_proxy_get_cached_property (G_DBUS_PROXY (self->priv->dtm), "CanNTP");
+  if (value)
+    {
+      if (g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN))
+        sensitive = g_variant_get_boolean (value);
+      g_variant_unref (value);
+    }
+
+  gtk_widget_set_sensitive (switch_widget, sensitive);
+}
+
+static void
 on_ntp_changed (CcDateTimePanel *self)
 {
   update_ntp_switch_from_system (self);
@@ -990,7 +1014,10 @@ cc_date_time_panel_init (CcDateTimePanel *self)
 
   /* set up network time button */
   if (priv->dtm != NULL)
-    update_ntp_switch_from_system (self);
+    {
+      update_ntp_switch_from_system (self);
+      on_can_ntp_changed (self);
+    }
   g_signal_connect (W("network_time_switch"), "notify::active",
                     G_CALLBACK (change_ntp), self);
 
@@ -1119,6 +1146,8 @@ cc_date_time_panel_init (CcDateTimePanel *self)
                         G_CALLBACK (on_timedated_properties_changed), self);
       g_signal_connect_swapped (priv->dtm, "notify::ntp",
                                 G_CALLBACK (on_ntp_changed), self);
+      g_signal_connect_swapped (priv->dtm, "notify::can-ntp",
+                                G_CALLBACK (on_can_ntp_changed), self);
       g_signal_connect_swapped (priv->dtm, "notify::timezone",
                                 G_CALLBACK (on_timezone_changed), self);
     }
diff --git a/panels/datetime/timedated1-interface.xml b/panels/datetime/timedated1-interface.xml
index b035d10..3370e0e 100644
--- a/panels/datetime/timedated1-interface.xml
+++ b/panels/datetime/timedated1-interface.xml
@@ -4,6 +4,7 @@
  <interface name="org.freedesktop.timedate1">
   <property name="Timezone" type="s" access="read"/>
   <property name="LocalRTC" type="b" access="read"/>
+  <property name="CanNTP" type="b" access="read"/>
   <property name="NTP" type="b" access="read"/>
   <method name="SetTime">
    <arg name="usec_utc" type="x" direction="in"/>