* Emit a signal when PlaylistInterface's currentIndex has changed.

src/libtomahawk/PlaylistInterface.cpp

@@ -219,5 +219,7 @@ void
 PlaylistInterface::setCurrentIndex( qint64 index )
 {
     m_currentIndex = index;
+
+    emit currentIndexChanged();
     onItemsChanged();
 }

src/libtomahawk/PlaylistInterface.h

@@ -100,6 +100,8 @@ signals:
     void previousTrackAvailable();
     void nextTrackAvailable();
 
+    void currentIndexChanged();
+
 protected slots:
     virtual void onItemsChanged();