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/*
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* Copyright (c) 2009 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: VideoThumbnailData singleton class definition
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*/
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#ifndef __VIDEOTHUMBNAILDATA_H__
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#define __VIDEOTHUMBNAILDATA_H__
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// INCLUDES
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#include <qobject.h>
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#include <qicon.h>
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#include <qpointer.h>
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#include <mpxitemid.h>
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#include "videocollectionexport.h"
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// FORWARD DECLARATIONS
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class VideoThumbnailDataPrivate;
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class VideoSortFilterProxyModel;
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// CLASS DECLARATIONS
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class VIDEOCOLLECTION_DLL_EXPORT VideoThumbnailData : public QObject
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{
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/**
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* Defined to be able to use signals and slots.
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*/
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Q_OBJECT
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/**
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* disable copy-constructor and assignment operator
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*/
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Q_DISABLE_COPY(VideoThumbnailData)
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public:
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/*
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* Thumbnail fetch priorities.
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*/
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enum VideoThumbnailPriority
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{
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VideoThumbnailPriorityLow = 2000,
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VideoThumbnailPriorityMedium = 3000,
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VideoThumbnailPriorityHigh = 5000
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};
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/**
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* Returns singleton instance for this class.
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*
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* @return The singleton instance.
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*
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*/
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static VideoThumbnailData &instance();
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/**
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* Method removes thumbnail data from the local repository.
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*
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* @param mediaId id for media whose thumbnail is to be removed
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*
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* @return bool: true if item removed correctly, false if not.
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*
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*/
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bool removeThumbnail(TMPXItemId mediaId);
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/**
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* Method returns a pointer to video's thumbnail.
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*
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* If thumbnail fetching is ongoing or not yet started, pointer to default
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* thumbnail is returned.
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*
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* @param mediaId media id for which to get thumbnail
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* @param tnData reference to thumbnail data where data is occupied
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*
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* @return QIcon* thumbnail pointer
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*
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*/
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const QIcon* getThumbnail(TMPXItemId mediaId);
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/**
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* Starts background thumbnail fetching, the model used for the background fetching
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* is also changed.
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*
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* @param model model of the items for the fetching.
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* @param fetchIndex index where to start the background thumbnail fetching.
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*
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*/
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void startBackgroundFetching(VideoSortFilterProxyModel *model, int fetchIndex);
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/**
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* Enables or disables thumbnail background fetching. Default is enabled.
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*
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* @param enable true enables and false disables thumbnail background fetching.
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*/
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void enableBackgroundFetching(bool enable);
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/**
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* Enables or disables thumbnail creation. Default is enabled. Thumbnails
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* that have been already generated are fetched still.
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*
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* @param enable true enables and false disables thumbnail creation.
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*/
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void enableThumbnailCreation(bool enable);
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/**
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* Frees allocated data for thumbnails and cancels ongoing fetches.
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*
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*/
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void freeThumbnailData();
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signals:
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/**
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* This signal is emitted from thumbnailReadySlot, when
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*
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* @param mediaIds: media ids of the videos whose thumbnail is ready.
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*
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*/
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void thumbnailsFetched(QList<TMPXItemId> mediaIds);
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private:
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/**
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* Default constructor
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*/
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VideoThumbnailData();
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/**
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* Destructor
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*/
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~VideoThumbnailData();
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/**
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* Private implementation.
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*/
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QPointer<VideoThumbnailDataPrivate> const d_ptr;
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};
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#endif // __VIDEOTHUMBNAILDATA_H__
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// End of file
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