diff -r 5b2a402e96ac -r 25fce757be94 usbuis/usbsettingsapp/inc/usbuimodelactive.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbuis/usbsettingsapp/inc/usbuimodelactive.h	Tue Aug 31 16:13:57 2010 +0300
@@ -0,0 +1,128 @@
+/*
+* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+#ifndef USBUIMODELACTIVE_H
+#define USBUIMODELACTIVE_H
+
+#include <QObject>
+#include <e32base.h>
+#include <usbwatcher.h>
+
+class UsbUiModelActivePrivate;
+
+/*!
+    \class UsbUiModelActive
+    \brief Helper class for using active objects in Qt classes.
+
+    UsbUiModelActive is a helper class for using active objects 
+    from any Qt class. It wraps a CActive-derived class in an interface
+    that uses Qt's signal-slot mechanism for communicating status changes 
+    of the active object.
+
+ */
+class UsbUiModelActive : public QObject
+{
+    Q_OBJECT
+    friend class UsbUiModelActivePrivate;
+
+public:
+    explicit UsbUiModelActive( int priority = CActive::EPriorityStandard, 
+            QObject *parent = NULL );
+    ~UsbUiModelActive();
+
+    inline TRequestStatus &RequestStatus();
+    inline void SetActive();
+    inline void Cancel();
+    inline bool IsActive();
+    
+public:
+    /*
+     * Sets the the selected personality through usbwatcher
+     * @param personality is the personality to be set
+     */
+    void SetUsbPersonality(int personality);
+    /*
+     * cancels the personality set in usbwatcher
+     */
+    void CancelSetPersonality();
+    
+signals:
+    void requestCompleted( int status );
+
+private:
+   /*!
+    * emits a signal when the request is completed
+    * @param status is the error
+    */
+    void emitRequestCompleted( int status );
+
+private:
+    UsbUiModelActivePrivate *d;
+     
+    /** Handle to USBWatcher for setting the personality */
+    RUsbWatcher iUsbWatcher; 
+};
+
+
+/*!
+    \class UsbUiModelActivePrivate
+    \brief Private class of UsbUiModelActive, for using active objects in Qt classes.
+
+    UsbUiModelActivePrivate is a helper class for using active objects 
+    from any Qt class. It derives from CActive and allows other classes to use 
+    it for passing to asynchronous function calls through its RequestStatus method.
+
+ */
+class UsbUiModelActivePrivate : public CActive
+{
+    friend class UsbUiModelActive;
+
+public:
+    explicit UsbUiModelActivePrivate( UsbUiModelActive *parent, int priority );
+    ~UsbUiModelActivePrivate();
+
+private:
+    virtual void RunL();
+    virtual void DoCancel();
+    virtual TInt RunError( TInt aError );
+
+private:
+    UsbUiModelActive *q;
+
+};
+
+inline bool UsbUiModelActive::IsActive()
+{
+    return d->IsActive();
+}
+
+inline TRequestStatus &UsbUiModelActive::RequestStatus()
+{
+    return d->iStatus;
+}
+
+inline void UsbUiModelActive::SetActive()
+{
+    d->SetActive();
+}
+
+inline void UsbUiModelActive::Cancel()
+{
+    d->Cancel();
+}
+
+#endif /* USBUIMODELACTIVE_H */