1 /*

     2 * ===========================================================================

     3 *  Name        : HgPropListener.h

     4 *  Part of     : Hg

     5 *  Description : Class to get notifications about changes to a P&S property

     6 *

     7 *  Copyright © 2008 Nokia Corporation.

     8 *  This material, including documentation and any related 

     9 *  computer programs, is protected by copyright controlled by 

    10 *  Nokia Corporation. All rights are reserved. Copying, 

    11 *  including reproducing, storing, adapting or translating, any 

    12 *  or all of this material requires the prior written consent of 

    13 *  Nokia Corporation. This material also contains confidential 

    14 *  information which may not be disclosed to others without the 

    15 *  prior written consent of Nokia Corporation.

    16 * ===========================================================================

    17 */

    18 

    19 #ifndef __PROPLISTENER_H__

    20 #define __PROPLISTENER_H__

    21 

    22 #include <e32base.h>

    23 #include <e32property.h>

    24 

    25 /**

    26  * Observer interface for getting notifications about a P&S property change.

    27  */

    28 class MHgPropertyChangeObserver

    29 	{

    30 public:

    31 	virtual void PropertyChanged( TUid aCategory, TUint aKey ) = 0;

    32 	};

    33 

    34 /**

    35  * Class to get notifications about changes to a P&S property.

    36  */

    37 NONSHARABLE_CLASS( CHgPropertyListener ) : public CActive

    38 	{

    39 public:

    40     /**

    41      * Constructor.

    42      * Starts listening for the property with the given category/key.

    43      */

    44 	IMPORT_C CHgPropertyListener( TUid aCategory,

    45 	    TUint aKey, MHgPropertyChangeObserver& aObserver );

    46 	    

    47 	/**

    48 	 * Destructor.

    49 	 */

    50 	IMPORT_C ~CHgPropertyListener();

    51     

    52 private:

    53 	void DoCancel();

    54 	void RunL(); 

    55 	TInt RunError( TInt aError );

    56 

    57 	MHgPropertyChangeObserver& iObserver;

    58 	RProperty iProperty;

    59 	TUid iCategory;

    60 	TUint iKey;

    61 	};

    62     

    63 #endif

    64 

    65 // End of file