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/*
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* Copyright (c) 2008 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 ID pin change
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*
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*/
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#ifndef C_USBIDPINOBSERVER_H
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#define C_USBIDPINOBSERVER_H
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#include <e32base.h>
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#include <e32property.h>
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/**
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* Obserber has to implement this interface to get ID Pin change notifications
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*
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*/
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NONSHARABLE_CLASS( MUsbIdPinObserver)
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{
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public:
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/**
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* IdPin disappeared
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*/
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virtual void IdPinOffL() = 0;
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/**
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* IdPin appeared
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*/
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virtual void IdPinOnL() = 0;
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/**
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* IdPin error
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* @param aError error code
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*/
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virtual void IdPinErrorL(TInt aError) = 0;
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};
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/**
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* Class observes ID-PIN property
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*
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*/
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NONSHARABLE_CLASS( CUsbIdPinObserver) : public CActive
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{
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public:
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enum TState
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{
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EIdPinOff = 0, EIdPinOn = 1
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};
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/**
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* Two-phased constructor.
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* @return instance of the objects of this class
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*/
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static CUsbIdPinObserver* NewL();
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/**
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* Destructor.
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*/
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virtual ~CUsbIdPinObserver();
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/**
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* Returns current state of the IdPin
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* @return state
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*/
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TState IdPin() /* not const - read comment in cpp*/;
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/**
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* Add observer
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* @param aObserver Observer
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*/
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void SubscribeL(MUsbIdPinObserver& aObserver);
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/**
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* Remove observer
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* @param aObserver Observer
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*/
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void UnsubscribeL(MUsbIdPinObserver& aObserver);
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private:
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// From CActive
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/**
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* Request completed
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*/
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void RunL();
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/**
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* Request cancelled
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*/
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void DoCancel();
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/**
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* RunL leaved
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* @param errorcode from RunL
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* @return errorcode
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*/
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TInt RunError(TInt aError);
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private:
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/**
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* Default constructor.
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*/
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CUsbIdPinObserver();
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/**
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* 2nd phase constructor.
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*/
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void ConstructL();
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private:
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// data
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/**
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* The observer reports state changes to its own observers
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* Not own
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*/
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RPointerArray<MUsbIdPinObserver> iObservers;
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/**
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* The observer observes property change
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*/
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RProperty iIdPin;
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};
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#endif // C_USBIDPINOBSERVER_H
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