[libgweather] GWeatherInfo: emit updated when GSettings change

[Giovanni Campagna <gcampagna src gnome org>]

commit 2be0becd564032c7b80e3a5963f008468b63d4e0
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Mon May 13 22:51:19 2013 +0200

    GWeatherInfo: emit updated when GSettings change
    
    This way applications can refresh the view to account for the
    string changes.

 libgweather/weather.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/libgweather/weather.c b/libgweather/weather.c
index 7868ee7..974cd35 100644
--- a/libgweather/weather.c
+++ b/libgweather/weather.c
@@ -399,6 +399,21 @@ gweather_info_reset (GWeatherInfo *info)
     priv->radar = NULL;
 }
 
+static void
+settings_changed_cb (GSettings    *settings,
+                    const char   *key,
+                    GWeatherInfo *info)
+{
+    GWeatherInfoPrivate *priv = info->priv;
+
+    /* Only emit the signal if no network requests are pending.
+       Otherwise just wait for the update that will happen at
+       the end
+    */
+    if (priv->requests_pending == 0)
+        g_signal_emit (info, gweather_info_signals[SIGNAL_UPDATED], 0);
+}
+
 void
 gweather_info_init (GWeatherInfo *info)
 {
@@ -407,6 +422,10 @@ gweather_info_init (GWeatherInfo *info)
     priv = info->priv = G_TYPE_INSTANCE_GET_PRIVATE (info, GWEATHER_TYPE_INFO, GWeatherInfoPrivate);
 
     priv->settings = g_settings_new ("org.gnome.GWeather");
+
+    g_signal_connect_object (priv->settings, "changed",
+                            G_CALLBACK (settings_changed_cb), info, 0);
+
     priv->radar_url = g_settings_get_string (priv->settings, RADAR_KEY);
     if (g_strcmp0 (priv->radar_url, "") == 0) {
        g_free (priv->radar_url);