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:    Class definition that monitors tv window visibility

    15 *

    16 */

    17 

    18 

    19 

    20 /**

    21  * @internal reviewed 24/08/2007 by D Holland

    22  */

    23 

    24 #ifndef __GLXWINVISIBILITYMONITOR_H__

    25 #define __GLXWINVISIBILITYMONITOR_H__

    26 

    27 // External Includes

    28 #include <e32base.h>                // for CBase

    29 #include <AknWsEventObserver.h>     // for MAknWsEventObserver

    30 

    31 

    32 // Forward Declarations

    33 class MGlxWindowVisibilityObserver;       

    34 

    35 

    36 

    37 /**

    38  * Class Description

    39  * An Active object derived class is used to monitor the visibility of the

    40  * TV out window.

    41  * @author Loughlin

    42  */        

    43 NONSHARABLE_CLASS(CGlxWindowVisibilityMonitor) : public CBase, 

    44                                                  public MAknWsEventObserver

    45     {

    46 public:

    47     /**

    48      * Static Symbian 2 stage constructor.

    49      */

    50     static CGlxWindowVisibilityMonitor* NewL(

    51                             MGlxWindowVisibilityObserver& aVisibilityObserver );

    52     

    53     /**

    54      * Destructor.

    55      */

    56     ~CGlxWindowVisibilityMonitor();

    57     

    58     

    59     /**

    60      * Close.

    61      */

    62     void Close();

    63     

    64 private:

    65 

    66     /**

    67      * Standard C++ constructor

    68      */

    69     CGlxWindowVisibilityMonitor( 

    70                         MGlxWindowVisibilityObserver& aVisibilityObserver );

    71     

    72     /*

    73      * Symbian second stage construction

    74      */

    75     void ConstructL(); 

    76 

    77 public: // class member functions

    78 

    79     /*

    80      * Provides the caller with the current visible state

    81      * @return ETrue if the window is visible or false otherwise

    82      */

    83     TBool IsVisible() const;

    84 

    85 public: // from MAknWsEventObserver

    86 

    87     void HandleWsEventL( const TWsEvent& aEvent, CCoeControl* aDestination );     

    88 

    89 private: // class member data

    90     // Not ownded: The Akn event monitor

    91     CAknWsEventMonitor* iAknEventMonitor;

    92     

    93     // Not owned: Window visibility observer

    94     MGlxWindowVisibilityObserver& iVisibilityObserver;

    95 

    96     // The visible state 

    97     TBool iIsVisible; 

    98     };

    99        

   100 

   101 

   102 #endif //  __GLXWINVISIBILITYMONITOR_H__