sl@0: // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: // Started by BLB, October 1996
sl@0: #if !defined(__BACNTF_H__)
sl@0: #define __BACNTF_H__
sl@0: 
sl@0: #include <e32base.h>
sl@0: 
sl@0: 
sl@0: class CEnvironmentChangeNotifier : public CActive
sl@0: /** Environment change notifier. This is an active object and can be used to handle 
sl@0: environment change events. 
sl@0: @publishedAll
sl@0: @released
sl@0: */
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CEnvironmentChangeNotifier* NewL(TInt aPriority,const TCallBack& aCallBack);
sl@0: 	IMPORT_C ~CEnvironmentChangeNotifier();
sl@0: 	IMPORT_C void Start();
sl@0: 	IMPORT_C TInt Set(const TCallBack& aCallBack);
sl@0: 	inline TInt Change() const;
sl@0: private:
sl@0: 	inline CEnvironmentChangeNotifier(TInt aPriority);
sl@0: 	void RunL();
sl@0: 	void DoCancel();
sl@0: private:
sl@0: 	TInt iChange;
sl@0: 	TCallBack iCallBack;
sl@0: 	RChangeNotifier iChangeNotifier;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: 
sl@0: inline TInt CEnvironmentChangeNotifier::Change() const
sl@0: 	/** Returns the last set of change events.
sl@0: 	
sl@0: 	If the last outstanding request completed normally, the function returns a 
sl@0: 	bit pattern where each bit value corresponds to one of the enumerators defined 
sl@0: 	by TChanges. A set bit indicates that the corresponding change event occurred.
sl@0: 	
sl@0: 	For example, if the bit value TChanges::EChangesMidnightCrossover is set, 
sl@0: 	then the system time has passed midnight.
sl@0: 	
sl@0: 	@return A set of bits consisting of one or more of the values defined by TChanges, 
sl@0: 	or KErrCancel if the last outstanding request was cancelled. 
sl@0: 	@see TChanges */
sl@0: 	{return iChange;}
sl@0: 
sl@0: #endif
sl@0: 
sl@0: