[ekiga/ds-gsettings] Added C++ boost class "wrapper" around GSettings.

[Damien Sandras <dsandras src gnome org>]

commit 87705f55b167091c9443dfe735b52e23a5d11212
Author: Damien Sandras <dsandras beip be>
Date:   Sun May 5 17:48:01 2013 +0200

    Added C++ boost class "wrapper" around GSettings.
    
    This allows C++ callbacks. Previous GSettings changes should use it
    instead of the custom static C functions calling C++ methods (which
    sucks actually).

 lib/ekiga-settings.h |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 47 insertions(+), 0 deletions(-)
---
diff --git a/lib/ekiga-settings.h b/lib/ekiga-settings.h
index 5514a04..8dc05fc 100644
--- a/lib/ekiga-settings.h
+++ b/lib/ekiga-settings.h
@@ -39,9 +39,56 @@
 #ifndef EKIGA_SETTINGS_H_
 #define EKIGA_SETTINGS_H_
 
+#include <boost/signals.hpp>
+#include <gio/gio.h>
+
 #define USER_INTERFACE "org.gnome." PACKAGE_NAME ".general.user-interface"
 
 #define SOUND_EVENTS_SCHEMA "org.gnome." PACKAGE_NAME ".general.sound-events"
 #define AUDIO_DEVICES_SCHEMA "org.gnome." PACKAGE_NAME ".devices.audio"
 
+namespace Ekiga {
+
+  /*
+   * This is a C++ wrapper around the GSettings signal function.
+   *
+   * Please use it in C++ code.
+   */
+  class Settings : boost::noncopyable {
+
+    static void f_callback (G_GNUC_UNUSED GSettings *settings,
+                            gchar *key,
+                            const Settings* self)
+    {
+      self->changed (std::string (key));
+    }
+
+
+public:
+
+    Settings (const std::string & _schema)
+    {
+      gsettings = g_settings_new (_schema.c_str ());
+      handler = g_signal_connect (gsettings, "changed", G_CALLBACK (&f_callback), this);
+    }
+
+    ~Settings ()
+    {
+      g_signal_handler_disconnect (gsettings, handler);
+      g_clear_object (&gsettings);
+    }
+
+    GSettings* get_g_settings ()
+    {
+      return gsettings;
+    }
+
+    boost::signal1<void, std::string> changed;
+
+private:
+    gulong handler;
+    GSettings *gsettings;
+  };
+}
+
 #endif /* EKIGA_SETTINGS_H */