telepathy-qt: AbstractDBusServiceInterface: Added notifyPropertyChanged() method.

[David Edmundson]

Module: telepathy-qt
Branch: master
Commit: 8443f7c5650304377a63462e8a480f94dee2a308
URL:    http://cgit.freedesktop.org/telepathy/telepathy-qt/commit/?id=8443f7c5650304377a63462e8a480f94dee2a308

Author: Alexandr Akulich <akulichalexander at gmail.com>
Date:   Tue Feb 10 18:47:28 2015 +0500

AbstractDBusServiceInterface: Added notifyPropertyChanged() method.

---

 TelepathyQt/dbus-service.cpp |   27 +++++++++++++++++++++++++++
 TelepathyQt/dbus-service.h   |    3 +++
 2 files changed, 30 insertions(+)

diff --git a/TelepathyQt/dbus-service.cpp b/TelepathyQt/dbus-service.cpp
index 607003e..c6dcab8 100644
--- a/TelepathyQt/dbus-service.cpp
+++ b/TelepathyQt/dbus-service.cpp
@@ -283,6 +283,33 @@ bool AbstractDBusServiceInterface::isRegistered() const
 }
 
 /**
+ * Emit PropertiesChanged signal on object org.freedesktop.DBus.Properties interface
+ * with the property \a propertyName.
+ *
+ * \param propertyName The name of the changed property.
+ * \param propertyValue The actual value of the changed property.
+ * \return \c false if the signal can not be emmited or \a true otherwise.
+ */
+bool AbstractDBusServiceInterface::notifyPropertyChanged(const QString &propertyName, const QVariant &propertyValue)
+{
+    if (!isRegistered()) {
+        return false;
+    }
+
+    QDBusMessage signal = QDBusMessage::createSignal(dbusObject()->objectPath(),
+                                                     TP_QT_IFACE_PROPERTIES,
+                                                     QLatin1String("PropertiesChanged"));
+    QVariantMap changedProperties;
+    changedProperties.insert(propertyName, propertyValue);
+
+    signal << interfaceName();
+    signal << changedProperties;
+    signal << QStringList();
+
+    return dbusObject()->dbusConnection().send(signal);
+}
+
+/**
  * Registers this interface by plugging its adaptor
  * on the given \a dbusObject.
  *
diff --git a/TelepathyQt/dbus-service.h b/TelepathyQt/dbus-service.h
index 59f6d2b..d584b89 100644
--- a/TelepathyQt/dbus-service.h
+++ b/TelepathyQt/dbus-service.h
@@ -90,6 +90,9 @@ protected:
     virtual bool registerInterface(DBusObject *dbusObject);
     virtual void createAdaptor() = 0;
 
+public:
+    bool notifyPropertyChanged(const QString &propertyName, const QVariant &propertyValue);
+
 private:
     class Private;
     friend class Private;