1 /*

     2 * Copyright (c) 2007 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:  Watches USB states

    15 *

    16 */

    17 

    18 

    19 #ifndef CUSBSTATEWATCHER_H

    20 #define CUSBSTATEWATCHER_H

    21 

    22 #include <e32std.h>

    23 #include <d32usbc.h>

    24 

    25 #include "cusbdevcon.h"

    26 

    27 /**

    28  *  Usb State watcher

    29  *  Reports Usb state changes to CUsbDevCon

    30  *

    31  *  @lib usbdevcon.lib

    32  *  @since S60 v.5.0 

    33  */

    34  

    35 class CUsbStateWatcher : public CActive

    36     {

    37 

    38 public:

    39 

    40     /**

    41      * Two-phased constructor.

    42      *

    43      * @since S60 v.5.0

    44      * @param aObserver Gets notifications when USB state changed

    45      * @param aLdd Link to LDD services

    46      * @return Constructed instance

    47      */ 

    48     static CUsbStateWatcher* NewL(CUsbDevCon& aObserver, RDevUsbcClient& aLdd);

    49     

    50     /**

    51     * Destructor.

    52     *

    53     * @since S60 v.5.0

    54     */

    55     virtual ~CUsbStateWatcher();

    56     

    57     /**

    58      * Activates USB states watching

    59      *

    60      * @since S60 v.5.0

    61      */

    62     void Activate();

    63         

    64 private:

    65     

    66     /**

    67      * Default construction

    68      *

    69      * @since S60 v.5.0

    70      * @param aObserver Gets notifications when USB state changed

    71      * @param aLdd Link to LDD services

    72      */

    73     CUsbStateWatcher(CUsbDevCon& aObserver, RDevUsbcClient& aLdd);

    74     

    75     /**

    76      * Two-phased constructor.

    77      *

    78      * @since S60 v.5.0

    79      */

    80     void ConstructL();

    81     

    82     // from CActive

    83     

    84     /**

    85      * From CActive.

    86      *

    87      */

    88     void RunL();

    89     

    90     /**

    91      * From CActive.

    92      *

    93      */ 

    94     void DoCancel();

    95     

    96      /**

    97      * From CActive.

    98      *

    99      */ 

   100      TInt RunError( TInt /*aError*/ );

   101 

   102 private: // data

   103     

   104     /**

   105      * Device state

   106      */

   107     TUint iState;

   108         

   109     /**

   110      * Observer

   111      * Not own.  

   112      */

   113     CUsbDevCon& iObserver;

   114     

   115     /**

   116      * LDD

   117      * Not own.  

   118      */

   119     RDevUsbcClient& iLdd;

   120     

   121     };

   122 

   123 #endif // CUSBSTATEWATCHER_H