diff -r f3d95d9c00ab -r 46974bebc798 radioengine/utils/api/mradiocontroleventobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/radioengine/utils/api/mradiocontroleventobserver.h	Fri Mar 19 09:29:04 2010 +0200
@@ -0,0 +1,192 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+
+#ifndef MRADIOCONTROLEVENTOBSERVER_H
+#define MRADIOCONTROLEVENTOBSERVER_H
+
+// System includes
+#include <e32std.h>
+
+// User includes
+#include "radioenginedef.h"
+
+/**
+ *  MRadioControlEventObserver
+ *
+ *  MRadioControlEventObserver defines observer interface for radio engine control events.
+ */
+NONSHARABLE_CLASS( MRadioControlEventObserver )
+    {
+public:
+
+    /**
+     * Called when "step to channel" request occurs.
+     *
+     * @param aDirection If ERadioUp steps up, otherwise steps down
+     */
+    virtual void StepToChannelL( RadioEngine::TRadioTuneDirection aDirection ) = 0;
+
+    /**
+     * Called when "set channel" request occurs.
+     *
+     * @param aChannelId Channel id to set
+     */
+    virtual void SetChannelL( TInt aChannelId ) = 0;
+
+    /**
+     * Called when "seek" request occurs.
+     *
+     * @param aDirection If ERadioUp seeks up, otherwise seeks down
+     */
+    virtual void SeekL( RadioEngine::TRadioTuneDirection aDirection ) = 0;
+
+    /**
+     * Called when "step to frequency up" request occurs.
+     *
+     * @param aDirection If ERadioUp steps up, otherwise steps down
+     */
+    virtual void StepToFrequencyL( RadioEngine::TRadioTuneDirection aDirection ) = 0;
+
+    /**
+     * Called when "set frequency" request occurs.
+     *
+     * @param aFreq Frequency to set
+     */
+    virtual void SetFrequencyL( TUint32 aFreq ) = 0;
+
+    /**
+     * Called when "adjust volume" request occurs.
+     *
+     * @param aDirection If ERadioDecVolume decreases, otherwise increases
+     * volume
+     */
+    virtual void AdjustVolumeL( RadioEngine::TRadioVolumeSetDirection aDirection ) = 0;
+
+    /**
+     * Called when "mute" request occurs.
+     *
+     * @param aMute if ETrue mutes, else unmutes radio
+     */
+    virtual void MuteL( TBool aMute ) = 0;
+
+    /**
+    * Called when "play" request occurs.
+    *
+    * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+    */
+    virtual void PlayL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "pause" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void PauseL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "play", "pause" or "pauseplay" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void PausePlayL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "stop" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void StopL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "forward" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void ForwardL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "fast forward" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void FastForwardL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "backward" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void BackwardL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "rewind" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void RewindL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "channel up" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void ChannelUpL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "channel down" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void ChannelDownL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "volume up" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void VolumeUpL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "volume down" request occurs.
+     *
+     * @param aDownPressed If ETrue, button is down. If EFalse, button is up.
+     */
+    virtual void VolumeDownL( TBool aDownPressed ) = 0;
+
+    /**
+     * Called when "change view" request occurs
+     *
+     * @param aViewId the id of activated view
+     * @param aForceChange if ETrue, view changing is forced and state
+     * of visual radio is not checked
+     */
+    virtual void ChangeViewL( TUid aViewId, TBool aForceChange ) = 0;
+
+    /**
+     * Called when audio route is changed
+     * @param aRoute the current audio route
+     */
+    virtual void SetAudioRouteL( RadioEngine::TRadioAudioRoute aRoute ) = 0;
+
+    /**
+     * Called when headset button answer/end call is pressed
+     */
+    virtual void AnswerEndCallL() = 0;
+
+    };
+
+#endif // MRADIOCONTROLEVENTOBSERVER_H