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:  Internal extension class for Avkon query control

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef AKNQUERYEXTENSION_H

    21 #define AKNQUERYEXTENSION_H

    22 

    23 // INCLUDES

    24 #include <e32base.h>

    25 

    26 // FORWARD DECLARATIONS

    27 class CAknQueryControl;

    28 class CAknsFrameBackgroundControlContext;

    29 

    30 // CLASS DECLARATION

    31 

    32 /**

    33 * Internal extension class for CAknQueryControl and derived classes.

    34 *

    35 * @since 2.6

    36 *

    37 * @internal

    38 */

    39 NONSHARABLE_CLASS(CAknQueryExtension) : public CBase

    40     {

    41     public: // New methods

    42 

    43         enum TVirtualInputStatus

    44             {

    45             EVirtualInputCheckedAlready,

    46             EVirtualInputEnabled

    47             };

    48         /**

    49         * Creates a new editor control context (with QsnFrInput),

    50         * but does not initialize rectangles.

    51         *

    52         * @since 2.6

    53         */

    54         void CreateEditorContextL();

    55 

    56         /**

    57         * Returns the editor context.

    58         *

    59         * @since 2.6

    60         */

    61         CAknsFrameBackgroundControlContext* EditorContext();

    62 

    63     private: // New methods (only used by CAknQueryControl)

    64 

    65         /**

    66         * Retrieves the extension instance.

    67         * This method is only used internally by CAknQueryControl.

    68         * Generally, @c CAknQueryControl::QueryExtension should be used to 

    69         * access the instance.

    70         */

    71         static CAknQueryExtension* Instance(

    72             const CAknQueryControl* aQueryControl );

    73 

    74     private: // Construction and destruction (only used by CAknQueryControl)

    75 

    76         /**

    77         * Creates the extension.

    78         */

    79         static void CreateExtensionL(

    80             const CAknQueryControl* aQueryControl );

    81 

    82         /**

    83         * Destroyes the extension.

    84         */

    85         static void DestroyExtension(

    86             const CAknQueryControl* aQueryControl );

    87 

    88         /**

    89         * Static constructor.

    90         */

    91         static CAknQueryExtension* NewL();

    92 

    93         /**

    94         * Destructor.

    95         */

    96         virtual ~CAknQueryExtension();

    97 

    98     private: // Data

    99         CAknsFrameBackgroundControlContext* iEditorContext;

   100         TBool iAllowEmptyInput;

   101         TBitFlags iVirtualInputStatusFlags;

   102 

   103     private: // Friend classes

   104         friend class CAknQueryControl;

   105         friend class CAknMultilineQueryControl;

   106     };

   107 

   108 #endif      // AKNQUERYEXTENSION_H

   109             

   110 // End of File