1 /*

     2 * Copyright (c) 2009-2009 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:  CDisplayContextBase class declaration.

    15 *

    16 */

    17 

    18 

    19 #ifndef DISPLAYSERVICEBASE_H

    20 #define DISPLAYSERVICEBASE_H

    21 

    22 // SYSTEM INCLUDE FILES

    23 #include <e32base.h>

    24 

    25 // USER INCLUDE FILES

    26 

    27 // FORWARD DECLARATIONS

    28 class CCFContextObject;

    29 class MCFContextInterface;

    30 

    31 // DATA TYPES

    32 

    33 // CLASS DECLARATION

    34 

    35 /**

    36  * Base class for all display type contexts.

    37  *

    38  * @lib None.

    39  * @since S60 5.0

    40  */

    41 NONSHARABLE_CLASS( CDisplayServiceBase ): public CBase

    42     {

    43 public:

    44     

    45     // Display service type

    46     enum TDisplayServiceType

    47         {

    48         EDisplayLightStatus,

    49         EDisplayUILayout

    50         };

    51     

    52     virtual ~CDisplayServiceBase();

    53     

    54 public:

    55     

    56     /**

    57      * Start the display service.

    58      * All the contexts must be defined here and also the initial value needs

    59      * to be set. This can also be done asynchronously.

    60      * 

    61      * @since S60 5.0

    62      * @param None.

    63      * @return None.

    64      */

    65     virtual void StartL() = 0;

    66     

    67     /**

    68      * Stop the display service.

    69      * 

    70      * @since S60 5.0

    71      * @param None.

    72      * @return None.

    73      */

    74     virtual void Stop() = 0;

    75     

    76 public:

    77     

    78     /**

    79      * Return the display context type.

    80      * 

    81      * @since S60 5.0

    82      * @param None.

    83      * @return None.

    84      */

    85     TInt DisplayServiceType() const;

    86     

    87 protected:

    88 

    89     /**

    90      * Default C++ constructor.

    91      */

    92     CDisplayServiceBase( TDisplayServiceType aType,

    93         MCFContextInterface& aCF );

    94     

    95     /**

    96      * Symbian 2nd phase constructor.

    97      */

    98     void ConstructL();

    99 

   100 protected: // Data

   101     

   102     /** Context associated with the display service */

   103     CCFContextObject* iContext;

   104     

   105     /** Reference to the Context Access API */

   106     MCFContextInterface& iCF;

   107     

   108     /** Handle to the current thread */

   109     RThread iThread;

   110 

   111 private: // Private data

   112     

   113     /** Display context type */

   114     TDisplayServiceType iType;

   115     };

   116 

   117 #endif // DISPLAYCONTEXTBASE_H