author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Mar 2010 09:28:13 +0200 | |
changeset 19 | 4e84c994a771 |
child 20 | 82baf59ce8dd |
permissions | -rw-r--r-- |
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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: Music Player collection album art manager. |
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* |
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*/ |
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#include <thumbnailmanager_qt.h> |
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#include "mpcollectionalbumartmanager.h" |
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#include "mptrace.h" |
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const int KMaxThumbnailReq = 5; |
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/*! |
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\class MpCollectionAlbumArtManager |
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\brief Music Player collection album art manager. |
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Collection album art manager provides access to album art needed for |
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display in certain collection views. It hides interface to the thumbnail |
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manager and also implements a caching mechanism for performance reasons. |
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*/ |
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/*! |
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\fn void albumArtReady( int index ) |
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This signal is emitted when album art for \a index is ready. |
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\sa getAlbumArt() |
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*/ |
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/*! |
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\fn void albumCacheReady() |
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This signal is emitted when album art cache is ready. |
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\sa cacheAlbumArt() |
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*/ |
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/*! |
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Constructs the album art manager. |
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*/ |
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MpCollectionAlbumArtManager::MpCollectionAlbumArtManager( QObject *parent ) |
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: QObject(parent), |
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mCachingInProgress(false), |
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mRequestCount(0) |
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{ |
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TX_ENTRY |
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mThumbnailManager = new ThumbnailManager(this); |
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mThumbnailManager->setMode(ThumbnailManager::Default); |
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mThumbnailManager->setQualityPreference(ThumbnailManager::OptimizeForQuality); |
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mThumbnailManager->setThumbnailSize(ThumbnailManager::ThumbnailSmall); |
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connect( mThumbnailManager, SIGNAL(thumbnailReady(QPixmap, void *, int, int)), |
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this, SLOT(thumbnailReady(QPixmap, void *, int, int)) ); |
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TX_EXIT |
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} |
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/*! |
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Destructs the album art manager. |
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*/ |
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MpCollectionAlbumArtManager::~MpCollectionAlbumArtManager() |
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{ |
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TX_ENTRY |
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cancel(); |
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mImageCache.clear(); |
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TX_EXIT |
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} |
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/*! |
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Returns the album art for the given \a albumArtUri. If the album art is not |
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available in its cache, an asynchronous request is made to the thumbnail manager |
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and a null icon is returned. |
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\sa signal albumArtReady |
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*/ |
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HbIcon MpCollectionAlbumArtManager::albumArt( const QString& albumArtUri, int index ) |
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{ |
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TX_ENTRY_ARGS("albumArtUri=" << albumArtUri << ", index=" << index); |
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HbIcon icon; |
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if ( mImageCache.contains(albumArtUri) ) { |
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icon = mImageCache.value(albumArtUri); |
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TX_EXIT_ARGS("true - album art returned"); |
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} |
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else { |
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if ( mRequestCount < KMaxThumbnailReq ) { |
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// Using negative index as priority will ensure that thumbnail requests |
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// are processed in the order they were requested. |
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int *clientData = new int(index); |
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int reqId = mThumbnailManager->getThumbnail( albumArtUri, clientData, -index ); |
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if ( reqId != -1 ) { |
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mTnmReqMap.insert( reqId, albumArtUri ); |
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mRequestCount++; |
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TX_EXIT_ARGS("false - album art requested"); |
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} |
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109 |
else { |
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TX_EXIT_ARGS("Err: thumbnail manager returned (-1) for getThumbnail request!"); |
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} |
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} |
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113 |
else { |
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mRequestQueue.enqueue( qMakePair(albumArtUri, index) ); |
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TX_EXIT_ARGS("false - request queued"); |
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} |
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} |
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return icon; |
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} |
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120 |
|
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121 |
/*! |
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Request to cache the album art for the items specified in \a albumArtList. |
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Returns 'true' if caching is started. If all items already exist in cache, |
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'false' is returned. |
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125 |
|
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\sa signal albumCacheReady |
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*/ |
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bool MpCollectionAlbumArtManager::cacheAlbumArt( const QStringList albumArtList ) |
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{ |
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TX_ENTRY |
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int allAvailable = true; |
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if ( !albumArtList.empty() ) { |
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QString albumArtUri; |
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int reqId; |
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QStringListIterator iter(albumArtList); |
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while ( iter.hasNext() ) { |
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albumArtUri = iter.next(); |
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if ( !mImageCache.contains(albumArtUri) ) { |
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reqId = mThumbnailManager->getThumbnail( albumArtUri ); |
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if ( reqId != -1 ) { |
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mTnmReqMap.insert( reqId, albumArtUri ); |
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mRequestCount++; |
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allAvailable = false; |
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} |
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else { |
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TX_EXIT_ARGS("Err: thumbnail manager returned (-1) for getThumbnail request!"); |
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} |
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TX_LOG_ARGS(albumArtUri); |
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} |
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} |
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} |
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152 |
|
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if ( allAvailable ) { |
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TX_EXIT_ARGS("Caching is done!"); |
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return false; |
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} |
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else { |
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TX_EXIT_ARGS("Caching is in progress!"); |
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mCachingInProgress = true; |
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return true; |
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} |
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} |
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163 |
|
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/*! |
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Cancels all outstanding album art requests. |
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166 |
|
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\sa getAlbumArt, cacheAlbumArt |
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*/ |
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void MpCollectionAlbumArtManager::cancel() |
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{ |
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TX_ENTRY |
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if ( !mTnmReqMap.empty() ) { |
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QMapIterator<int, QString> iter(mTnmReqMap); |
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while ( iter.hasNext() ) { |
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iter.next(); |
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bool result = mThumbnailManager->cancelRequest(iter.key()); |
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} |
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} |
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mTnmReqMap.clear(); |
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mRequestQueue.clear(); |
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mRequestCount = 0; |
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mCachingInProgress = false; |
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TX_EXIT |
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} |
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185 |
|
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186 |
|
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187 |
/*! |
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188 |
Slot to be called when thumbnail bitmap generation or loading is complete. |
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*/ |
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void MpCollectionAlbumArtManager::thumbnailReady( const QPixmap& pixmap, void *data, int id, int error ) |
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{ |
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TX_ENTRY_ARGS("id=" << id << ", error=" << error); |
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193 |
|
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// Find the index |
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if ( mTnmReqMap.contains(id) ) { |
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// Remove the request whether it completed successfully or with error. |
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QString albumArtUri = mTnmReqMap[id]; |
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mTnmReqMap.remove( id ); |
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mRequestCount--; |
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200 |
|
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201 |
if ( mCachingInProgress ) { |
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202 |
if ( error == 0 ) { |
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QIcon qicon(pixmap); |
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HbIcon icon(qicon); |
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mImageCache.insert(albumArtUri, icon); |
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206 |
} |
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207 |
else { |
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208 |
TX_EXIT_ARGS("Err: thumbnail manager returned (-1) for getThumbnail request!"); |
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209 |
} |
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210 |
if ( mTnmReqMap.empty() ) { |
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TX_LOG_ARGS("Album art cache ready!"); |
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mCachingInProgress = false; |
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emit albumCacheReady(); |
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return; |
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} |
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} |
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else { |
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if ( error == 0 ) { |
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int *clientData = (int *)data; |
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int index = *clientData; |
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delete clientData; |
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|
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QIcon qicon(pixmap); |
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HbIcon icon(qicon); |
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mImageCache.insert(albumArtUri, icon); |
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TX_LOG_ARGS("Album art ready for index=" << index); |
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emit albumArtReady(index); |
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} |
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else { |
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TX_EXIT_ARGS("Err: thumbnail manager returned (-1) for getThumbnail request!"); |
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} |
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} |
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} |
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234 |
|
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// Check to see if any request is pending in the queue |
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while ( !mRequestQueue.isEmpty() |
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&& (mRequestCount < KMaxThumbnailReq) ) { |
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QPair<QString, int> req = mRequestQueue.dequeue(); |
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QString albumArtUri = req.first; |
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int index = req.second; |
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241 |
|
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// Using negative index as priority will ensure that thumbnail requests |
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// are processed in the order they were requested. |
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int *clientData = new int(index); |
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int reqId = mThumbnailManager->getThumbnail( albumArtUri, clientData, -index ); |
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if ( reqId != -1 ) { |
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mTnmReqMap.insert( reqId, albumArtUri ); |
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mRequestCount++; |
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249 |
} |
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else { |
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251 |
TX_EXIT_ARGS("Err: thumbnail manager returned (-1) for getThumbnail request!"); |
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} |
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253 |
} |
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254 |
TX_EXIT |
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255 |
} |
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|
256 |