--- a/inc/mpcommondefs.h	Tue Jul 06 14:13:36 2010 +0300
+++ b/inc/mpcommondefs.h	Wed Aug 18 09:46:20 2010 +0300
@@ -20,6 +20,8 @@
 #ifndef MPCOMMONDEFS_H
 #define MPCOMMONDEFS_H
 
+#include <QMetaType>
+
 namespace MpCommon
 {
     // UID definition
@@ -40,7 +42,8 @@
         ActivateCollectionView,
         ActivatePlaybackView,
         ActivateSettingsView,
-        ActivateDetailsView
+        ActivateDetailsView,
+        ActivatePreviousView
     };
 
     /*!
@@ -62,6 +65,18 @@
         TBoneThumb,
         MediaWallThumb,
     };
+    
+    /*!
+    Volume property, used in MpMpxPlaybackFramework and MpVolumeSlider.
+    */
+    enum MpVolumeProperty{
+        MaxVolume,
+        Volume,
+        MuteState
+    };
 }
 
+    // Register MpVolumeProperty so can be used in signal and slot connection
+    Q_DECLARE_METATYPE( MpCommon::MpVolumeProperty )
+
 #endif	// MPCOMMONDEFS_H