--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/engine/controlsrc/shwmusiccontrol.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,188 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    The music control for the slideshow
+ *
+*/
+
+
+
+#ifndef __CSHWMUSICCONTROL_H__
+#define __CSHWMUSICCONTROL_H__
+
+// INCLUDES
+#include <e32std.h>
+#include <e32base.h>
+
+#include <mpxplaybackobserver.h>		// MMPXPlaybackCallback
+#include <mpxplaybackframeworkdefs.h> 	// TMPXPlaybackProperty
+
+#include "shwmusicobserver.h"			// MShwMusicObserver
+#include "shweventobserver.h"
+#include "shweventpublisherbase.h"
+
+
+// FORWARD DECLARATIONS
+class MMPXPlaybackUtility;
+
+
+// CLASS DECLARATION
+
+/**
+ * CShwMusicControl
+ * Slideshow music control wraps the MPX music control for slideshow
+ * @lib shwslideshowengine.lib
+ * @author Loughlin Spollen
+ */
+NONSHARABLE_CLASS( CShwMusicControl )
+		  : public CShwEventPublisherBase, 
+		    public MShwEventObserver, 
+	        public MMPXPlaybackCallback,
+			public MMPXPlaybackObserver
+	{
+	public: // Constructors and destructor
+
+		/**
+		 * Constructor.
+		 * @param aFilePath, the list that this view control manages
+		 * @param aMusicObsvr, the music control observer which receives
+		 * 					   notification of music on/off and 
+		 *					   volume level.
+		 */
+		static CShwMusicControl* NewL(MShwMusicObserver& aMusicObsvr, 
+										const TDesC& aFilePath);
+
+		/**
+		 * Destructor.
+		 */
+		~CShwMusicControl();
+
+	private:
+
+		/**
+		 * Constructor
+		 * @param aFilePath, the list that this view control manages
+		 * @param aMusicObsrvr* the music control observer. May be Null. 
+		 */
+		CShwMusicControl(MShwMusicObserver& aMusicObsvr, 
+						const TDesC& aFilePath);
+
+		/**
+		 * 2nd stage constructor
+		 */
+		void ConstructL();
+
+		/**
+		 * Initialise the player utility member
+		 */
+		void InitPlayerL();
+		
+		/**
+		 * Retrieve the current volume settings from the player 
+		 *		utility member
+		 * Volume settins are retrieved asyncronously
+		 */
+		void VolumeL();
+
+	public: // From MShwEventObserver
+
+		/** @ref MShwEventObserver::NotifyL */
+		void NotifyL(MShwEvent* aEvent);
+
+	public: // From MMPXPlaybackCallback
+
+        /**
+         * Handle playback property
+		 * @ref MMPXPlaybackCallback::HandlePropertyL 
+		 */	
+		void HandlePropertyL(
+		    TMPXPlaybackProperty aProperty, 
+			TInt aValue, TInt aError );
+		
+        /**
+         * Method is called continously until aComplete=ETrue,
+         * signifying that it is done and there will be no more 
+         * callbacks
+         * Only new items are passed each time
+		 * @ref MMPXPlaybackCallback::HandleSubPlayerNamesL
+         */		
+		void HandleSubPlayerNamesL(
+		    TUid aPlayer, const MDesCArray* aSubPlayers,
+            TBool aComplete, TInt aError );
+
+        /**
+         * Handle extended media properties
+		 * @ref MMPXPlaybackCallback::HandleMediaL
+         */
+		void HandleMediaL(
+		    const CMPXMedia& aProperties, TInt aError );
+
+	private:	// From MMPXPlaybackObserver 
+	
+	    /**
+         * Handle playback message - required for debugging state of MPX 
+         * Player component
+		 */	
+         void HandlePlaybackMessageL(
+            const TMPXPlaybackMessage& aMessage );
+         
+       /**
+        *  Handle playback message
+        *  NOTE: only one of HandlePlaybackMessage callback can be implemented
+        * 
+        *  @param aMsg playback message, ownership not transferred. 
+        *         Please check aMsg is not NULL before using it. If aErr is not 
+        *         KErrNone, plugin might still call back with more info in the aMsg.
+        *  @param aErr system error code.
+        */
+		 void HandlePlaybackMessage(const CMPXMessage& aMsg);
+		 
+	private: // Implementation
+
+        // implmentation of the NotifyL
+        void HandleEventL( MShwEvent* aEvent );
+        
+        /// Own: music is beeing switched on
+        TBool iSwitchingMusicOn;
+
+		/// Ref: the path to the music file
+		const TDesC& iFilePath;
+
+	    /// Own: the MPX player utility
+	    MMPXPlaybackUtility* iPlaybackUtility;
+
+	    /// Ref: Music Observer 
+	    MShwMusicObserver&   iMusicObsvr;
+
+	    /// Own: the max volume setting
+	    TInt iMaxVolume;
+	    
+	    /// Own: the current volume setting
+	    TInt iCurrentVolume;
+
+	    // It is set to ETrue if music can be played
+	    TBool iCanPlay;
+	    
+	    // It is set to ETrue if music player is not yet initialized
+	    TBool iPlayCached;
+
+		/// Own: state flag
+		enum TState 
+			{
+			EMusicOn,
+			EMusicOff
+			} iState;	    
+
+	};
+
+#endif // __CSHWMUSICCONTROL_H__