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/*
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* Copyright (c) 2007-2007 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 the License "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: This Class is observer class for thumbnail generation request
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*
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*/
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#ifndef MGTHUMBOBSERVER_H_
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#define MGTHUMBOBSERVER_H_
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#include<e32base.h>
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#include<e32cmn.h>
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#include<thumbnailmanager.h>
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#include<thumbnailmanagerobserver.h>
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class CThumbnailManager;
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class MThumbnailObserver;
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const TInt KNegative = -1;
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/**
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* TThumbnailRequestInfo class This class contains the information of thumbanil generation request
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*
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* @since Series60 v3.2
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*/
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class TThumbnailRequestInfo
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{
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public:
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/**
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* Constructor
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*/
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TThumbnailRequestInfo():iObserver(NULL),iThumbnailPath(NULL),iTransactionId(KNegative),iThumbnailRequestId(KNegative)
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{
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}
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public:
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/**
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*Pointer to instance of MThumbnailObserver
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*/
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MThumbnailObserver* iObserver;
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/**
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*Thumbnail path
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*/
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HBufC* iThumbnailPath;
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/**
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*Transaction Id
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*/
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TInt32 iTransactionId;
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/**
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*It is thumbanil request id
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*/
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TThumbnailRequestId iThumbnailRequestId;
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};
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/**
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* CThumbnailObserver class
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* @since Series60 v3.2
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*/
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class CThumbnailObserver: public CActive ,public MThumbnailManagerObserver
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{
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public:
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/**
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* Two-phased constructor
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* @return CThumbnailObserver* Returns the instance of
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* CThumbnailObserver.
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*/
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static CThumbnailObserver* NewL();
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/**
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* This method adds the thumbnail request information to observer
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*@param aObserver Observer
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*@param aTransactionID TransactionId
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*@param aThumbnailPath Path where thumbnail will be saved
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*@param aThumbnailRequestId It request id of thumbnail generation request
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* @return void
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*/
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void AddToObserverL(MThumbnailObserver* aObserver,TInt32 aTransactionID ,TDesC& aThumbnailPath , TThumbnailRequestId aThumbnailRequestId);
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/**
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* This method is derived from MThumbnailManagerObserver
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*@param aThumbnail Thumbnaildata
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*@param aThumbnailRequestId It request id of thumbnail generation request
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* @return void
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*/
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virtual void ThumbnailPreviewReady(MThumbnailData& aThumbnail, TThumbnailRequestId aId);
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/**
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* This method is derived from MThumbnailManagerObserver
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*@param aError Error returned to callback method
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*@param aThumbnail Thumbnaildata
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*@param aThumbnailRequestId It request id of thumbnail generation request
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* @return void
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*/
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virtual void ThumbnailReady(TInt aError, MThumbnailData& aThumbnail, TThumbnailRequestId aId);
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/**
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* Destructor
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*/
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~CThumbnailObserver();
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/**
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* This method cancels the thumbnail generation request
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*@param aTransactionID Transaction Id
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* @return TInt it returns KErrNone if request is canceled otherwise system wide error
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*/
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TInt Cancel(TInt32 aTransactionID);
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/**
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* This method sets the thumbnail manager to observer class
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*@param aThumbnailManager pointer to thumbnail manager
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* @return void
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*/
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void SetThumbnailMangager(CThumbnailManager* aThumbnailManager);
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/**
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* User will call this method when thumbnail already exists
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* @return void
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*/
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void ThumbnailAlreadyExists();
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public:
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/**
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* Methods derived from CActive
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* @return void
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*/
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void DoCancel();
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/**
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* Methods derived from CActive
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* @return void
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*/
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void RunL();
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private:
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/**
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* Constructor
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*/
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CThumbnailObserver();
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private:
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/**
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* Pointer to thumbnailManager
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*/
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CThumbnailManager* iThumbnailManager;
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/**
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* Array of TThumbnailRequestInfo
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*/
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RArray<TThumbnailRequestInfo> iThumbnailRequestArray;
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};
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#endif /* MGTHUMBOBSERVER_H_ */
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