1 /*

     2 * Copyright (c) 2008-2009 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:    Thumbnail background generation task implementation

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 /**

    22  * @internal reviewed 30/07/2007 by Simon Brooks

    23  */

    24 

    25 #ifndef GLXTNBACKGROUNDGENERATIONTASK_H

    26 #define GLXTNBACKGROUNDGENERATIONTASK_H

    27 

    28 // INCLUDES

    29 

    30 #include "glxtnsavethumbnailtask.h"

    31 #include <glxsettingsmodel.h>

    32 

    33 // CONSTANTS

    34 

    35 // MACROS

    36 

    37 // DATA TYPES

    38 

    39 // FUNCTION PROTOTYPES

    40 

    41 // FORWARD DECLARATIONS

    42 

    43 class CGlxtnFileUtility;

    44 class CGlxtnImageUtility;

    45 class CGlxtnVideoUtility;

    46 

    47 // CLASS DECLARATION

    48 

    49 /**

    50 * Background task to generate a thumbnail.

    51 *

    52 * @author Dan Rhodes

    53 * @ingroup glx_thumbnail_creator

    54 */

    55 NONSHARABLE_CLASS(CGlxtnBackgroundGenerationTask) : public CGlxtnSaveThumbnailTask

    56     {

    57     public:  // Constructors and destructor

    58 

    59         /**

    60         * Two-phased constructor.

    61         * @param iItemId Media ID of item to thumbnail.

    62         * @param aFileUtility File utility for use by the task.

    63         * @param aClient Client initiating the request.

    64         */

    65         static CGlxtnBackgroundGenerationTask* NewL(

    66                     const TGlxMediaId& iItemId, CGlxtnFileUtility& aFileUtility,

    67                     MGlxtnThumbnailCreatorClient& aClient, 

    68                     CGlxSettingsModel::TSupportedOrientations aSupportedOrientations);

    69 

    70         /**

    71         * Destructor.

    72         */

    73         virtual ~CGlxtnBackgroundGenerationTask();

    74 

    75     private:    // From CGlxtnTask

    76         TBool DoStartL(TRequestStatus& aStatus);

    77     	void DoCancel(); 

    78     	TBool DoRunL(TRequestStatus& aStatus);

    79         TBool DoRunError(TInt aError);

    80 

    81     private:

    82         /**

    83         * C++ default constructor.

    84         * @param iItemId Media ID of item to thumbnail.

    85         * @param aFileUtility File utility for use by the task.

    86         * @param aClient Client initiating the request.

    87         */

    88         CGlxtnBackgroundGenerationTask(const TGlxMediaId& iItemId,

    89                                     CGlxtnFileUtility& aFileUtility,

    90                                     MGlxtnThumbnailCreatorClient& aClient, 

    91                     CGlxSettingsModel::TSupportedOrientations aSupportedOrientations);

    92 

    93         /**

    94         * By default Symbian 2nd phase constructor is private.

    95         */

    96         void ConstructL();

    97 

    98         /**

    99         * Check whether next size already exists or needs to be generated.

   100         * @param aStatus Request status for the asynchronous operation.

   101         * @return ETrue if the task has issued an asyncronous request.

   102         */

   103         TBool CheckNextL(TRequestStatus& aStatus);

   104 

   105         /**

   106         * Create the next size to be generated.

   107         * @param aStatus Request status for the asynchronous operation.

   108         * @return ETrue if the task has issued an asyncronous request.

   109         */

   110         TBool ProcessNextL(TRequestStatus& aStatus);

   111 

   112         /**

   113         * Filter the thumbnail for the next required size.

   114         * @param aStatus Request status for the asynchronous operation.

   115         */

   116         void FilterThumbnailL(TRequestStatus& aStatus);

   117 

   118         /**

   119         * Scale the thumbnail to the next required size.

   120         * @param aStatus Request status for the asynchronous operation.

   121         */

   122         void ScaleThumbnailL(TRequestStatus& aStatus);

   123 

   124         /**

   125         * Decode the image for the required size.

   126         * @param aStatus Request status for the asynchronous operation.

   127         */

   128         void DecodeImageL(TRequestStatus& aStatus);

   129         /**

   130         * calculates Grid Icon Size for landscape orientation and Fullscreen

   131         * Image size depending on Layout defines.

   132         */

   133         void LayoutSpecificDataL();

   134 	

   135     

   136 	private:    // Data

   137         /** Pointer to client, or NULL after client goes away */

   138         MGlxtnThumbnailCreatorClient* iClient;

   139         /** File utility */

   140         CGlxtnFileUtility& iFileUtility;

   141         /** Array of sizes to check if need to generate */

   142         RArray<TSize> iSizes;

   143         /** Array of sizes to generate */

   144         RArray<TSize> iTodoSizes;

   145         /** Utility to get thumbnail from image */

   146         CGlxtnImageUtility* iImageUtility;

   147         /** Utility to get thumbnail from video */

   148         CGlxtnVideoUtility* iVideoUtility;

   149         /** Image loaded from file */

   150         CFbsBitmap* iImage;

   151        /** Image loaded from file */

   152         CFbsBitmap* iFilteredImage;

   153         /** Flag to show BadFileMarker not created so no need to delete **/

   154         TBool iBadFileMarkerNotNeededFlag;

   155         /** Flag to show whether image has been decoded yet **/

   156         TBool iImageDecoded;

   157         /** Flag to show which orientations are supported **/

   158         CGlxSettingsModel::TSupportedOrientations iSupportedOrientations;

   159 		TSize iGridIconSize;

   160 		TSize iCoverflowIconSize;

   161     };

   162 

   163 #endif  // GLXTNBACKGROUNDGENERATIONTASK_H

   164 

   165 // End of File