1 /*

     2 * Copyright (c) 2008 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:  Usb observer definition for fmtx watcher plugin.

    15 *

    16 */

    17 

    18 

    19 #ifndef HWRMFMTXUSBOBSERVER_H

    20 #define HWRMFMTXUSBOBSERVER_H

    21 

    22 #include <usbman.h>

    23 #include "hwrmfmtxwatcherplugin.h"

    24 #include "hwrmfmtxconnobserver.h"

    25 

    26 /**

    27 * Active object for obtaining notification of changes in USB connections.

    28 *

    29 * @since S60 3.2

    30 * @lib hwrmfmtxwatcherplugin.lib

    31 */

    32 NONSHARABLE_CLASS(CHWRMFmtxUsbObserver) : public CActive, 

    33                                   public MHWRMFmtxConnObserver

    34 	{

    35 public:

    36 

    37     /**

    38     * This is a two-phase constructor method that is used to create a new

    39     * instance for listening to the changes in USB connections.

    40     *

    41     * @param aObserver A reference to an observer instance.

    42     * @return A pointer to a new instance of the CHWRMFmtxUsbObserver class.

    43     *

    44 	* @leave One of the Symbian OS error codes.

    45     */

    46     static CHWRMFmtxUsbObserver* NewL( MHWRMFmtxConnObserverCallback& aObserver );

    47     

    48     /**

    49     * Destructor.

    50     */

    51     ~CHWRMFmtxUsbObserver();

    52     

    53     // From MHWRMFmtxConnObserver

    54     TBool GetStatusL();

    55 	void StartObservingL();

    56 	void StopObserving();

    57 

    58 private:

    59 

    60     /**

    61     * Constructor.

    62     *

    63     * @param aObserver A reference to an observer instance.

    64     */

    65     CHWRMFmtxUsbObserver( MHWRMFmtxConnObserverCallback& aObserver );

    66     

    67     /**

    68     * By default Symbian OS constructor is private.

    69     */

    70     void ConstructL();

    71     

    72     /**

    73     * Orders USB notification.

    74     */

    75     void OrderUsbNotification();

    76 

    77 protected:

    78 

    79     // from CActive

    80     void RunL();

    81     void DoCancel();

    82 

    83 private:

    84 

    85     /**

    86     * Handle to usbman.

    87     */    

    88 	RUsb iUsbMan;

    89 

    90     /**

    91     * Storage for USB device state.

    92     * Updated upon completion of USB notification.

    93     */

    94     TUsbDeviceState iDeviceState;

    95 

    96     /**

    97     * Response callback pointer.

    98     */    

    99     MHWRMFmtxConnObserverCallback& iCallback;

   100     

   101     /**

   102     * Stores USB connection status, ETrue if connected.

   103     * Used for filtering out excess USB configuration change notifications.

   104     */    

   105     TBool iConnected;

   106 	};

   107 

   108 

   109 #endif      // HWRMFMTXUSBOBSERVER_H

   110             

   111 // End of File