mmappcomponents/harvester/server/inc/mpxusbeventhandler.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:55:47 +0200
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Monitors USB events
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*
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*/
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#ifndef CMPXUSBEVENTHANDLER_H
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#define CMPXUSBEVENTHANDLER_H
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#include <usbman.h>
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#include <mpxpskeyobserver.h>
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#include "mpxsystemeventobserver.h"
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class CMPXPSKeyWatcher;
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/**
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 *  USB Monitoring class
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 *
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 *  @lib mpxharvesterserver.exe
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 *  @since S60 3.0
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 */
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NONSHARABLE_CLASS( CMPXUsbEventHandler ) : public CActive,
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                                           public MMPXPSKeyObserver
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    {
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public:
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    /**
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    * Two-phase constructor
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    * @param aObserver observer to the event handler
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    */
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    static CMPXUsbEventHandler* NewL( MMPXSystemEventObserver& aObserver );
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    /**
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    * Two-phase constructor
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    * @param aObserver observer to the event handler
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    */
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    static CMPXUsbEventHandler* NewLC( MMPXSystemEventObserver& aObserver );
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    /**
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    * Virtual destructor
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    */
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    virtual ~CMPXUsbEventHandler();
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public:
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    /**
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    * Polls for the current monitor status
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    * If an event is happening, it will callback the observer of the event
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    */
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    void PollStatus();
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protected: // From Base Class
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    /**
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    * From CActive
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    */
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    void RunL();
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    void DoCancel();
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    /**
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    * From MMPXPSKeyObserver
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    */
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    void HandlePSEvent( TUid aUid, TInt aKey );
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private: // New Methods
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    /**
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    * Handle the PS Key event
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    * @param aUid UID of the key
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    * @param aKey ID of the key
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    */
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    void DoHandlePSEventL( TUid aUid, TInt aKey );
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    /**
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     * Connect to usbman.
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     * If error, default iDeviceState to EUsbDeviceStateConfigured so this would not
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     * block usb event mode change.
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     */
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    void ConnectUsbMan();
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private:
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    /**
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    *  C++ constructor
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    */
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    CMPXUsbEventHandler( MMPXSystemEventObserver& aObserver );
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    /*
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    * Second phased constructor
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    */
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    void ConstructL();
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private: // data
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    CMPXPSKeyWatcher*  iPSKeyWatcher;  // PS key watcher for USB PS key
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    CMPXPSKeyWatcher*  iMTPKeyWatcher; // PS key watcher for MTP PS key
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    TBool              iWasMtp;        // Was the operation Mass Storage or MTP
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    /*
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    * Observer interface to callback to an observer
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    */
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    MMPXSystemEventObserver& iObserver;
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    TInt iState;
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    TBool iMTPActive;
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    RUsb            iUsbMan;
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    TUsbDeviceState iDeviceState;
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    TBool           iUsbManConnected;
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    };
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#endif // CMPXUSBEVENTHANDLER_H