1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Pure virtual base class for viewer observer.

    15 *

    16 */

    17 

    18 

    19 #ifndef IHLVIEWEROBSERVER_H

    20 #define IHLVIEWEROBSERVER_H

    21 

    22 // INCLUDES

    23 #include <e32std.h>

    24 

    25 // CLASS DECLARATION

    26 /**

    27 *  MIHLViewerObserver

    28 *

    29 *  Pure virtual base class for viewer observer.

    30 *  @lib IHL.lib

    31 *  @since 3.0

    32 */

    33 class MIHLViewerObserver

    34 	{

    35 	public:

    36 

    37         /**

    38         * This callback is currently not supported!

    39         *

    40         * Notifies client of viewer events.

    41 		* Event codes are defined in viewer header.

    42 		* Leave situation is handled in ViewerError() callback.

    43         * @since 3.0

    44         * @param aEvent Type of event.

    45         * @param aEventCode1 Event specific code 1.

    46         * @param aEventCode2 Event specific code 2.

    47 		*/

    48 		virtual void ViewerEventL( TInt /*aEvent*/, TInt /*aEventCode1*/, TInt /*aEventCode2*/ ) {}

    49 

    50 		/**

    51         * Notifies client when viewer bitmap content is changed.

    52 		* Leave situation is handled in ViewerError() callback.

    53         * @since 3.0

    54 		*/

    55 		virtual void ViewerBitmapChangedL() = 0;

    56 

    57         /**

    58         * Notifies client if error occurs in viewer.

    59         * @since 3.0

    60         * @param aError System wide error code.

    61 		*/

    62 		virtual void ViewerError( TInt aError ) = 0;

    63 

    64 	};

    65 

    66 #endif // IHLIMAGEVIEWEROBSERVER_H

    67 

    68 // End of File