diff -r 1a6714c53019 -r cce62ebc198e radioengine/utils/inc/cradiosystemeventdetector.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/radioengine/utils/inc/cradiosystemeventdetector.h	Tue Aug 31 15:15:02 2010 +0300
@@ -0,0 +1,111 @@
+/*
+* 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 CRADIOSYSTEMEVENTDETECTOR_H
+#define CRADIOSYSTEMEVENTDETECTOR_H
+
+#include <e32base.h>
+
+#include "cradiopropertyobserver.h"
+
+class MRadioSystemEventDetectorObserver;
+
+/**
+* Catches notification of the call and network state changes.
+*
+* Class provides implementation to detect system events and notify UI components of the event,
+* Class keeps several instances of CVPropertyObserver, and those instances send event notifications
+* about the particular system component state change.
+*/
+NONSHARABLE_CLASS( CRadioSystemEventDetector ) : public CBase
+                                               , public MRadioPropertyChangeObserver
+    {
+public:
+
+    static CRadioSystemEventDetector* NewL( MRadioSystemEventDetectorObserver&  aObserver );
+
+    virtual ~CRadioSystemEventDetector();
+
+    /**
+     * Returns network coverage state ( wlan or mobile ).
+     */
+    TBool IsNetworkCoverage() const;
+
+    /**
+     * Returns mobile network coverage state.
+     */
+    TBool IsMobileNetworkCoverage() const;
+
+    /**
+     * Returns current call state.
+     */
+    TBool IsCallActive() const;
+
+    /**
+     * Returns current audio resources state.
+     * @return audio resources state
+     */
+    TBool IsAudioResourcesAvailable() const;
+
+    /**
+     * Returns current Voice UI state.
+     * @return ETrue if Voice UI is active, EFalse otherwise
+     */
+    TBool IsVoiceUiActive() const;
+
+protected:
+
+// from base class MRadioPropertyChangeObserver
+
+    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TInt aValue );
+    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TDesC8& aValue );
+    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TDesC& aValue );
+    void HandlePropertyChangeErrorL( const TUid& aCategory, const TUint aKey, TInt aError );
+
+private:
+
+    void ConstructL();
+
+    CRadioSystemEventDetector( MRadioSystemEventDetectorObserver&  aObserver );
+
+private: // data
+
+    /** Observer which will be notified of the call and network state changes*/
+    MRadioSystemEventDetectorObserver&  iObserver;
+
+    /** handler to Publish & Subscribe interface*/
+    CRadioPropertyObserver*     iCallStatusObserver;
+    /** handler to Publish & Subscribe interface*/
+    CRadioPropertyObserver*     iNetworkStatusObserver;
+    /** handler to Publish & Subscribe interface*/
+    CRadioPropertyObserver*     iAudioPolicyObserver;
+
+    /**Indicator for the mobile network status*/
+    TBool                       iIsMobileNetworkCoverage;
+
+    /**Indicator for the call status*/
+    TBool                       iIsCallActive;
+
+    /** Array of audio policy categories that radio must not resume after. */
+    RArray<TInt>                iNoAutoResumeAudioCategories;
+
+    /** Indicator for audio resource status. */
+    TBool                       iIsAudioResourcesAvailable;
+    
+    };
+
+#endif // CRADIOSYSTEMEVENTDETECTOR_H