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 #ifndef __GLXWINVISIBILITYMONITOR_H__

    20 #define __GLXWINVISIBILITYMONITOR_H__

    21 

    22 // External Includes

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

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

    25 

    26 

    27 // Forward Declarations

    28 class MGlxWindowVisibilityObserver;       

    29 

    30 

    31 /**

    32  * Class Description

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

    34  * TV out window.

    35  */        

    36 NONSHARABLE_CLASS(CGlxWindowVisibilityMonitor) : public CBase, 

    37                                                  public MAknWsEventObserver

    38     {

    39 public:

    40     /**

    41      * Static Symbian 2 stage constructor.

    42      */

    43     static CGlxWindowVisibilityMonitor* NewL(

    44                             MGlxWindowVisibilityObserver& aVisibilityObserver );

    45     

    46     /**

    47      * Destructor.

    48      */

    49     ~CGlxWindowVisibilityMonitor();

    50     

    51     

    52     /**

    53      * Close.

    54      */

    55     void Close();

    56     

    57 private:

    58 

    59     /**

    60      * Standard C++ constructor

    61      */

    62     CGlxWindowVisibilityMonitor( 

    63                         MGlxWindowVisibilityObserver& aVisibilityObserver );

    64     

    65     /*

    66      * Symbian second stage construction

    67      */

    68     void ConstructL(); 

    69 

    70 public: /// class member functions

    71 

    72     /**

    73      * Provides the caller with the current visible state

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

    75      */

    76     TBool IsVisible() const;

    77 

    78 public: // from MAknWsEventObserver

    79 

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

    81 

    82 private: /// class member data

    83     /// Not ownded: The Akn event monitor

    84     CAknWsEventMonitor* iAknEventMonitor;

    85     

    86     /// Not owned: Window visibility observer

    87     MGlxWindowVisibilityObserver& iVisibilityObserver;

    88 

    89     /// The visible state 

    90     TBool iIsVisible; 

    91     };

    92        

    93 

    94 

    95 #endif //  __GLXWINVISIBILITYMONITOR_H__