--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mpviewplugins/mpcollectionviewplugin/src/mpcollectiondatamodel.cpp Fri Mar 19 09:28:13 2010 +0200
@@ -0,0 +1,242 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Music Player collection data model.
+*
+*/
+
+#include <QBrush>
+#include <QColor>
+
+#include <hbicon.h>
+
+#include "mpcollectiondatamodel.h"
+#include "mpcollectionalbumartmanager.h"
+#include "mpmpxcollectiondata.h"
+#include "mptrace.h"
+
+const int KInitCacheSize = 11;
+
+/*!
+ \class MpCollectionDataModel
+ \brief Music Player collection data model.
+
+ Collection data model implements the interface specified by HbAbstractDataModel,
+ which defines the standard interface that item models must use to be able to
+ interoperate with other components in the model/view architecture.
+
+ Every item of data that can be accessed via a model has an associated model
+ index.
+
+ Each item has a number of data elements associated with it and they can be
+ retrieved by specifying a role (see Qt::ItemDataRole) to the model's data
+ returned by itemData() function.
+
+ \sa HbAbstractDataModel
+*/
+
+/*!
+ Constructs the collection data model.
+ */
+MpCollectionDataModel::MpCollectionDataModel( MpMpxCollectionData *data, QObject *parent )
+ : QAbstractListModel(parent),
+ mCollectionData(data),
+ mRowCount(0),
+ mCachingInProgress(false)
+{
+ TX_ENTRY
+ mAlbumArtManager = new MpCollectionAlbumArtManager();
+ connect( mAlbumArtManager, SIGNAL(albumArtReady(int)), this, SLOT(updateAlbumArt(int)) );
+ connect( mAlbumArtManager, SIGNAL(albumCacheReady()), this, SLOT(albumCacheReady()) );
+ TX_EXIT
+}
+
+/*!
+ Destructs the collection data model.
+ */
+MpCollectionDataModel::~MpCollectionDataModel()
+{
+ TX_ENTRY
+ delete mAlbumArtManager;
+ TX_EXIT
+}
+
+/*!
+ Returns the number of rows under the given \a parent.
+
+ View will request for the row count immediately after a model is set.
+ To prevent it from reading data while caching the album art for the first
+ screen, return row count as zero.
+
+ \reimp
+ */
+int MpCollectionDataModel::rowCount( const QModelIndex &parent ) const
+{
+ TX_LOG
+ Q_UNUSED(parent);
+ if ( mCachingInProgress ) {
+ return 0;
+ }
+ else {
+ return mRowCount;
+ }
+}
+
+/*!
+ Returns the data stored for the item referred to by the \a index.
+
+ \reimp
+ */
+QVariant MpCollectionDataModel::data(const QModelIndex &index, int role) const
+{
+ TX_ENTRY
+ QVariant returnValue = QVariant();
+ if ( !index.isValid() ) {
+ return returnValue;
+ }
+
+ int row = index.row();
+ TX_LOG_ARGS("index=" << row << ", role=" << role);
+ TCollectionContext context = mCollectionData->context();
+ if ( role == Qt::DisplayRole ) {
+ QStringList display;
+ // Fetch the primary text, which is the title, if available.
+ QString primaryText;
+ primaryText = mCollectionData->itemData(row, MpMpxCollectionData::Title);
+ if ( !primaryText.isEmpty() ) {
+ display << primaryText;
+ }
+ else {
+ display << QString( tr("Unknown") );
+ }
+
+ // Fetch the secondary text, which depends on the current context, if available.
+ QString secondaryText;
+ switch ( context ) {
+ case ECollectionContextAllSongs:
+ case ECollectionContextArtistAlbums:
+ case ECollectionContextPlaylistSongs:
+ secondaryText = mCollectionData->itemData(row, MpMpxCollectionData::Artist);
+ if ( !secondaryText.isEmpty() ) {
+ display << secondaryText;
+ }
+ else {
+ display << QString( tr("Unknown") );
+ }
+ break;
+ case ECollectionContextPlaylists:
+ secondaryText = mCollectionData->itemData(row, MpMpxCollectionData::Count);
+ if ( !secondaryText.isEmpty() ) {
+ display << secondaryText;
+ }
+ break;
+ }
+ returnValue = display;
+ }
+ else if ( role == Qt::DecorationRole ) {
+ switch ( context ) {
+ case ECollectionContextArtistAlbums:
+ bool defaultArt = true;
+ QString albumArtUri = mCollectionData->itemData(row, MpMpxCollectionData::AlbumArtUri);
+ if ( !albumArtUri.isEmpty() ) {
+ HbIcon icon = mAlbumArtManager->albumArt(albumArtUri, row);
+ if ( !icon.isNull() ) {
+ returnValue = icon;
+ defaultArt = false;
+ }
+ }
+ if ( defaultArt ) {
+ // No album art, use default album art
+ HbIcon icon(QString(":/icons/default_album.png"));
+ returnValue = icon;
+ }
+ break;
+ }
+ }
+ TX_EXIT
+ return returnValue;
+}
+
+/*!
+ Must be called when data has changed and model needs to be refreshed
+ to reflect the new data.
+ */
+void MpCollectionDataModel::refreshModel()
+{
+ TX_ENTRY
+ // Cancel all outstanding album art request first, then reset the model.
+ mAlbumArtManager->cancel();
+ mRowCount = mCollectionData->count();
+
+ TCollectionContext context = mCollectionData->context();
+ if ( context == ECollectionContextArtistAlbums ) {
+ // Before providing the new data to the view (list, grid, etc.), we want
+ // to make sure that we have enough album arts for the first screen.
+ if ( mRowCount > 0 ) {
+ int initCount = ( mRowCount > KInitCacheSize ) ? KInitCacheSize : mRowCount;
+ QStringList albumArtList;
+ QString albumArtUri;
+ for ( int i = 0; i < initCount; i++ ) {
+ albumArtUri = mCollectionData->itemData(i, MpMpxCollectionData::AlbumArtUri);
+ if ( !albumArtUri.isEmpty() ) {
+ albumArtList << albumArtUri;
+ }
+ }
+ mCachingInProgress = mAlbumArtManager->cacheAlbumArt(albumArtList);
+ if ( !mCachingInProgress ) {
+ reset();
+ }
+ }
+ else {
+ reset();
+ }
+ }
+ else {
+ reset();
+ }
+ TX_EXIT
+}
+
+/*!
+ Returns pointer to MpMpxCollectionData, which is the collection data.
+ */
+MpMpxCollectionData *MpCollectionDataModel::collectionData()
+{
+ return mCollectionData;
+}
+
+/*!
+ Slot to be called when album art for the \a index needs to be updated.
+ */
+void MpCollectionDataModel::updateAlbumArt( int index )
+{
+ TX_ENTRY_ARGS("index=" << index);
+ if ( index > 0 && index < mRowCount ) {
+ QModelIndex modelIndex = QAbstractItemModel::createIndex(index, 0);
+ emit dataChanged(modelIndex, modelIndex);
+ }
+ TX_EXIT
+}
+
+/*!
+ Slot to be called when album art cache is ready.
+ */
+void MpCollectionDataModel::albumCacheReady()
+{
+ TX_ENTRY
+ if ( mCachingInProgress ) {
+ mCachingInProgress = false;
+ reset();
+ }
+ TX_EXIT
+}