1 /*

     2 * Copyright (c) 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: 

    15 *

    16 */

    17 

    18 #ifndef USBUIMODELACTIVE_H

    19 #define USBUIMODELACTIVE_H

    20 

    21 #include <QObject>

    22 #include <e32base.h>

    23 #include <usbwatcher.h>

    24 

    25 class UsbUiModelActivePrivate;

    26 

    27 /*!

    28     \class UsbUiModelActive

    29     \brief Helper class for using active objects in Qt classes.

    30 

    31     UsbUiModelActive is a helper class for using active objects 

    32     from any Qt class. It wraps a CActive-derived class in an interface

    33     that uses Qt's signal-slot mechanism for communicating status changes 

    34     of the active object.

    35 

    36  */

    37 class UsbUiModelActive : public QObject

    38 {

    39     Q_OBJECT

    40     friend class UsbUiModelActivePrivate;

    41 

    42 public:

    43     explicit UsbUiModelActive( int priority = CActive::EPriorityStandard, 

    44             QObject *parent = NULL );

    45     ~UsbUiModelActive();

    46 

    47     inline TRequestStatus &RequestStatus();

    48     inline void SetActive();

    49     inline void Cancel();

    50     inline bool IsActive();

    51     

    52 public:

    53     int SetUsbPersonality(int personality);

    54     void CancelSetPersonality();

    55     

    56 signals:

    57     void requestCompleted( int status );

    58 

    59 private:

    60    /*!

    61     * emits a signal when the request is completed

    62     * @param status is the error

    63     */

    64     void emitRequestCompleted( int status );

    65 

    66 private:

    67     UsbUiModelActivePrivate *d;

    68      

    69     /** Handle to USBWatcher for setting the personality */

    70     RUsbWatcher iUsbWatcher; 

    71 };

    72 

    73 

    74 /*!

    75     \class UsbUiModelActivePrivate

    76     \brief Private class of UsbUiModelActive, for using active objects in Qt classes.

    77 

    78     UsbUiModelActivePrivate is a helper class for using active objects 

    79     from any Qt class. It derives from CActive and allows other classes to use 

    80     it for passing to asynchronous function calls through its RequestStatus method.

    81 

    82  */

    83 class UsbUiModelActivePrivate : public CActive

    84 {

    85     friend class UsbUiModelActive;

    86 

    87 public:

    88     explicit UsbUiModelActivePrivate( UsbUiModelActive *parent, int priority );

    89     ~UsbUiModelActivePrivate();

    90 

    91 private:

    92     virtual void RunL();

    93     virtual void DoCancel();

    94     virtual TInt RunError( TInt aError );

    95 

    96 private:

    97     UsbUiModelActive *q;

    98 

    99 };

   100 

   101 inline bool UsbUiModelActive::IsActive()

   102 {

   103     return d->IsActive();

   104 }

   105 

   106 inline TRequestStatus &UsbUiModelActive::RequestStatus()

   107 {

   108     return d->iStatus;

   109 }

   110 

   111 inline void UsbUiModelActive::SetActive()

   112 {

   113     d->SetActive();

   114 }

   115 

   116 inline void UsbUiModelActive::Cancel()

   117 {

   118     d->Cancel();

   119 }

   120 

   121 #endif /* USBUIMODELACTIVE_H */