From 357d9b13d5dfa48a3a2add1f797e48c452466bf5 Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Thu, 13 Jun 2013 10:18:36 +0200
Subject: [PATCH] * Emit a signal when the currentTrackPlaylist changes in
 AudioEngine.

---
 src/libtomahawk/audio/AudioEngine.cpp | 25 +++++++++++++++++++++----
 src/libtomahawk/audio/AudioEngine.h   |  2 ++
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/src/libtomahawk/audio/AudioEngine.cpp b/src/libtomahawk/audio/AudioEngine.cpp
index 7f0ebb5b9..1a1073712 100644
--- a/src/libtomahawk/audio/AudioEngine.cpp
+++ b/src/libtomahawk/audio/AudioEngine.cpp
@@ -688,7 +688,7 @@ AudioEngine::loadPreviousTrack()
     if ( d->playlist.data()->previousResult() )
     {
         result = d->playlist.data()->setSiblingResult( -1 );
-        d->currentTrackPlaylist = d->playlist;
+        setCurrentTrackPlaylist( d->playlist );
     }
 
     if ( !result.isNull() )
@@ -731,7 +731,7 @@ AudioEngine::loadNextTrack()
         if ( d->playlist.data()->nextResult() )
         {
             result = d->playlist.data()->setSiblingResult( 1 );
-            d->currentTrackPlaylist = d->playlist;
+            setCurrentTrackPlaylist( d->playlist );
         }
     }
 
@@ -763,9 +763,13 @@ AudioEngine::playItem( Tomahawk::playlistinterface_ptr playlist, const Tomahawk:
     setPlaylist( playlist );
 
     if ( playlist.isNull() && !fromQuery.isNull() )
-        d->currentTrackPlaylist = playlistinterface_ptr( new SingleTrackPlaylistInterface( fromQuery ) );
+    {
+        setCurrentTrackPlaylist( playlistinterface_ptr( new SingleTrackPlaylistInterface( fromQuery ) ) );
+    }
     else
-        d->currentTrackPlaylist = playlist;
+    {
+        setCurrentTrackPlaylist( playlist );
+    }
 
     if ( !result.isNull() )
     {
@@ -1210,3 +1214,16 @@ AudioEngine::onVolumeChanged( qreal volume )
 {
     emit volumeChanged( volume * 100 );
 }
+
+
+void
+AudioEngine::setCurrentTrackPlaylist( const playlistinterface_ptr& playlist )
+{
+    Q_D( AudioEngine );
+
+    if ( d->currentTrackPlaylist != playlist )
+    {
+        d->currentTrackPlaylist = playlist;
+        emit currentTrackPlaylistChanged( d->currentTrackPlaylist );
+    }
+}
diff --git a/src/libtomahawk/audio/AudioEngine.h b/src/libtomahawk/audio/AudioEngine.h
index 0e052f0a7..0544fe120 100644
--- a/src/libtomahawk/audio/AudioEngine.h
+++ b/src/libtomahawk/audio/AudioEngine.h
@@ -117,6 +117,7 @@ signals:
     void timerPercentage( unsigned int percentage );
 
     void playlistChanged( Tomahawk::playlistinterface_ptr playlist );
+    void currentTrackPlaylistChanged( Tomahawk::playlistinterface_ptr playlist );
 
     void error( AudioEngine::AudioErrorCode errorCode );
 
@@ -143,6 +144,7 @@ private:
     void checkStateQueue();
     void queueState( AudioState state );
     void setState( AudioState state );
+    void setCurrentTrackPlaylist( const Tomahawk::playlistinterface_ptr& playlist );
 
     Q_DECLARE_PRIVATE( AudioEngine );
     AudioEnginePrivate* d_ptr;