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 data model. |
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* |
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*/ |
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#include <QBrush> |
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#include <QColor> |
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#include <hbicon.h> |
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#include "mpcollectiondatamodel.h" |
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#include "mpcollectionalbumartmanager.h" |
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#include "mpmpxcollectiondata.h" |
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#include "mptrace.h" |
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const int KInitCacheSize = 11; |
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/*! |
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\class MpCollectionDataModel |
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\brief Music Player collection data model. |
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Collection data model implements the interface specified by HbAbstractDataModel, |
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which defines the standard interface that item models must use to be able to |
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interoperate with other components in the model/view architecture. |
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Every item of data that can be accessed via a model has an associated model |
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index. |
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Each item has a number of data elements associated with it and they can be |
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retrieved by specifying a role (see Qt::ItemDataRole) to the model's data |
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returned by itemData() function. |
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\sa HbAbstractDataModel |
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*/ |
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/*! |
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Constructs the collection data model. |
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*/ |
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MpCollectionDataModel::MpCollectionDataModel( MpMpxCollectionData *data, QObject *parent ) |
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: QAbstractListModel(parent), |
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mCollectionData(data), |
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mRowCount(0), |
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mCachingInProgress(false) |
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{ |
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TX_ENTRY |
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mAlbumArtManager = new MpCollectionAlbumArtManager(); |
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connect( mAlbumArtManager, SIGNAL(albumArtReady(int)), this, SLOT(updateAlbumArt(int)) ); |
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connect( mAlbumArtManager, SIGNAL(albumCacheReady()), this, SLOT(albumCacheReady()) ); |
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TX_EXIT |
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} |
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|
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/*! |
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Destructs the collection data model. |
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*/ |
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MpCollectionDataModel::~MpCollectionDataModel() |
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{ |
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TX_ENTRY |
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delete mAlbumArtManager; |
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TX_EXIT |
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} |
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|
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/*! |
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Returns the number of rows under the given \a parent. |
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View will request for the row count immediately after a model is set. |
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To prevent it from reading data while caching the album art for the first |
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screen, return row count as zero. |
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\reimp |
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*/ |
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int MpCollectionDataModel::rowCount( const QModelIndex &parent ) const |
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{ |
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TX_LOG |
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Q_UNUSED(parent); |
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if ( mCachingInProgress ) { |
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return 0; |
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} |
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else { |
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return mRowCount; |
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} |
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} |
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/*! |
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Returns the data stored for the item referred to by the \a index. |
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\reimp |
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*/ |
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QVariant MpCollectionDataModel::data(const QModelIndex &index, int role) const |
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{ |
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TX_ENTRY |
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QVariant returnValue = QVariant(); |
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if ( !index.isValid() ) { |
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return returnValue; |
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} |
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|
107 |
|
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|
108 |
int row = index.row(); |
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|
109 |
TX_LOG_ARGS("index=" << row << ", role=" << role); |
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|
110 |
TCollectionContext context = mCollectionData->context(); |
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|
111 |
if ( role == Qt::DisplayRole ) { |
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112 |
QStringList display; |
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113 |
// Fetch the primary text, which is the title, if available. |
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114 |
QString primaryText; |
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115 |
primaryText = mCollectionData->itemData(row, MpMpxCollectionData::Title); |
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116 |
if ( !primaryText.isEmpty() ) { |
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117 |
display << primaryText; |
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118 |
} |
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119 |
else { |
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120 |
display << QString( tr("Unknown") ); |
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121 |
} |
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|
122 |
|
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123 |
// Fetch the secondary text, which depends on the current context, if available. |
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124 |
QString secondaryText; |
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125 |
switch ( context ) { |
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126 |
case ECollectionContextAllSongs: |
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127 |
case ECollectionContextArtistAlbums: |
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128 |
case ECollectionContextPlaylistSongs: |
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129 |
secondaryText = mCollectionData->itemData(row, MpMpxCollectionData::Artist); |
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130 |
if ( !secondaryText.isEmpty() ) { |
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131 |
display << secondaryText; |
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132 |
} |
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133 |
else { |
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134 |
display << QString( tr("Unknown") ); |
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135 |
} |
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136 |
break; |
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|
137 |
case ECollectionContextPlaylists: |
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|
138 |
secondaryText = mCollectionData->itemData(row, MpMpxCollectionData::Count); |
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|
139 |
if ( !secondaryText.isEmpty() ) { |
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140 |
display << secondaryText; |
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141 |
} |
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142 |
break; |
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|
143 |
} |
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144 |
returnValue = display; |
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145 |
} |
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146 |
else if ( role == Qt::DecorationRole ) { |
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147 |
switch ( context ) { |
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148 |
case ECollectionContextArtistAlbums: |
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149 |
bool defaultArt = true; |
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150 |
QString albumArtUri = mCollectionData->itemData(row, MpMpxCollectionData::AlbumArtUri); |
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151 |
if ( !albumArtUri.isEmpty() ) { |
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152 |
HbIcon icon = mAlbumArtManager->albumArt(albumArtUri, row); |
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|
153 |
if ( !icon.isNull() ) { |
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154 |
returnValue = icon; |
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|
155 |
defaultArt = false; |
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|
156 |
} |
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|
157 |
} |
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|
158 |
if ( defaultArt ) { |
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|
159 |
// No album art, use default album art |
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|
160 |
HbIcon icon(QString(":/icons/default_album.png")); |
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161 |
returnValue = icon; |
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|
162 |
} |
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Revision: 201007
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|
163 |
break; |
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|
164 |
} |
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Revision: 201007
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|
165 |
} |
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|
166 |
TX_EXIT |
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|
167 |
return returnValue; |
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|
168 |
} |
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|
169 |
|
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170 |
/*! |
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Revision: 201007
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|
171 |
Must be called when data has changed and model needs to be refreshed |
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Revision: 201007
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|
172 |
to reflect the new data. |
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|
173 |
*/ |
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Revision: 201007
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|
174 |
void MpCollectionDataModel::refreshModel() |
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|
175 |
{ |
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Revision: 201007
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|
176 |
TX_ENTRY |
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177 |
// Cancel all outstanding album art request first, then reset the model. |
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|
178 |
mAlbumArtManager->cancel(); |
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Revision: 201007
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|
179 |
mRowCount = mCollectionData->count(); |
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|
180 |
|
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|
181 |
TCollectionContext context = mCollectionData->context(); |
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|
182 |
if ( context == ECollectionContextArtistAlbums ) { |
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Revision: 201007
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parents:
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|
183 |
// Before providing the new data to the view (list, grid, etc.), we want |
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Revision: 201007
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|
184 |
// to make sure that we have enough album arts for the first screen. |
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Revision: 201007
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|
185 |
if ( mRowCount > 0 ) { |
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Revision: 201007
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|
186 |
int initCount = ( mRowCount > KInitCacheSize ) ? KInitCacheSize : mRowCount; |
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|
187 |
QStringList albumArtList; |
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|
188 |
QString albumArtUri; |
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|
189 |
for ( int i = 0; i < initCount; i++ ) { |
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|
190 |
albumArtUri = mCollectionData->itemData(i, MpMpxCollectionData::AlbumArtUri); |
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|
191 |
if ( !albumArtUri.isEmpty() ) { |
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|
192 |
albumArtList << albumArtUri; |
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|
193 |
} |
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|
194 |
} |
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Revision: 201007
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|
195 |
mCachingInProgress = mAlbumArtManager->cacheAlbumArt(albumArtList); |
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|
196 |
if ( !mCachingInProgress ) { |
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|
197 |
reset(); |
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|
198 |
} |
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|
199 |
} |
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|
200 |
else { |
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Revision: 201007
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parents:
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|
201 |
reset(); |
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|
202 |
} |
4e84c994a771
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|
203 |
} |
4e84c994a771
Revision: 201007
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|
204 |
else { |
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|
205 |
reset(); |
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|
206 |
} |
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Revision: 201007
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|
207 |
TX_EXIT |
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|
208 |
} |
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|
209 |
|
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|
210 |
/*! |
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Revision: 201007
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|
211 |
Returns pointer to MpMpxCollectionData, which is the collection data. |
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|
212 |
*/ |
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MpMpxCollectionData *MpCollectionDataModel::collectionData() |
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{ |
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return mCollectionData; |
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} |
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/*! |
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Slot to be called when album art for the \a index needs to be updated. |
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*/ |
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void MpCollectionDataModel::updateAlbumArt( int index ) |
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{ |
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TX_ENTRY_ARGS("index=" << index); |
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if ( index > 0 && index < mRowCount ) { |
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QModelIndex modelIndex = QAbstractItemModel::createIndex(index, 0); |
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emit dataChanged(modelIndex, modelIndex); |
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} |
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TX_EXIT |
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} |
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/*! |
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Slot to be called when album art cache is ready. |
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*/ |
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void MpCollectionDataModel::albumCacheReady() |
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{ |
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TX_ENTRY |
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if ( mCachingInProgress ) { |
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mCachingInProgress = false; |
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reset(); |
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} |
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TX_EXIT |
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} |