1 /*

     2 * Copyright (c) 2003,2004 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:  Active object for calling Camera Application Engine methods 

    15 *                indirectly from callbacks

    16 *

    17 */

    18 

    19 

    20 

    21 #ifndef CAECALLBACKACTIVE_H

    22 #define CAECALLBACKACTIVE_H

    23 

    24 // INCLUDES

    25 #include <e32base.h>

    26 #include <e32std.h>

    27 

    28 // FORWARD DECLARATIONS

    29 class CCaeEngineImp;

    30 

    31 

    32 // CLASS DECLARATION

    33 

    34 /**

    35 * CCaeCallbackActive

    36 * Active object for calling Camera Application Engine methods 

    37 * indirectly from callbacks 

    38 */

    39 NONSHARABLE_CLASS( CCaeCallbackActive ) : public CActive

    40     {

    41     public: // Constructors and destructor

    42         

    43         /**

    44         * Symbian OS two-phased constructor.

    45         * @since 2.1

    46         * @param aCamAppEngine Reference to CCaeEngineImp instance

    47         */

    48         static CCaeCallbackActive* NewLC( 

    49             CCaeEngineImp& aCamAppEngine );

    50 

    51         /**

    52         * Symbian OS two-phased constructor.

    53         * @since 2.1

    54         * @param aCamAppEngine Reference to CCaeEngineImp instance

    55         */

    56         static CCaeCallbackActive* NewL( 

    57             CCaeEngineImp& aCamAppEngine );

    58 

    59         /**

    60         * Destructor.

    61         */

    62         virtual ~CCaeCallbackActive();

    63 

    64     protected: // Constructors and destructor

    65         

    66         /**

    67         * Symbian OS 2nd phase constructor that can leave.

    68         */

    69         void ConstructL();

    70 

    71         /**

    72         * C++ constructor.

    73         * @since 2.1

    74         * @param aCamAppEngine Reference to CCaeEngineImp instance

    75         */

    76         CCaeCallbackActive( 

    77             CCaeEngineImp& aCamAppEngine );

    78 

    79     public: // New methods

    80 

    81         /**

    82         * Switches camera module power on.

    83         * @since 2.1

    84         * @return void

    85         */

    86         void PowerOn();

    87 

    88     public: // Methods from CActive (was protected)

    89         

    90         /**

    91         * Calls Camera Application Engine operation.

    92         * @return void

    93         */

    94         void RunL();

    95 

    96     protected: // Methods from CActive

    97 

    98         /**

    99         * Cancels request.

   100         * @return void

   101         */

   102         void DoCancel();

   103 

   104     private:

   105 

   106         // Timer to implement delayed operation calls.

   107         RTimer iTimer;

   108 

   109         // Reference to Camera Application Engine.

   110         CCaeEngineImp& iCamAppEngine;

   111 

   112         // Requests available.

   113         enum TRequest

   114             {

   115             /** Default */

   116             ERequestDefault,

   117             /** Switch camera power on */

   118             ERequestPowerOn,

   119             };

   120 

   121         // Request.

   122         TRequest iRequest;

   123 

   124     };

   125 

   126 #endif // CAECALLBACKACTIVE_H

   127 

   128 // End of File