1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: Music Player secondary collection abstract data model. This is

    15 *              primarily used to support Mediawall in Collection View. This

    16 *              model represents the list containing album songs.

    17 *

    18 */

    19 

    20 #include <hbnamespace.h>

    21 

    22 #include "mpcollectiontbonelistdatamodel.h"

    23 #include "mpmpxcollectiondata.h"

    24 #include "mptrace.h"

    25 

    26 /*!

    27     \class MpCollectionTBoneListDataModel

    28     \brief Music Player collection data model.

    29 

    30     Secondary collection data model implements the interface specified by

    31     QAbstractListModel, which defines the standard interface that item models

    32     must use to be able to interoperate with other components in the model/view

    33     architecture.

    34 

    35     Every item of data that can be accessed via a model has an associated model

    36     index.

    37 

    38     Each item has a number of data elements associated with it and they can be

    39     retrieved by specifying a role (see Qt::ItemDataRole) to the model's data

    40     returned by itemData() function.

    41 

    42     MpCollectionTBoneListDataModel is primarily used to support Mediawall in

    43     Collection View. This model represents the list containing album songs.

    44 

    45     \sa QAbstractListModel

    46 */

    47 

    48 /*!

    49     \fn void albumDataChanged()

    50 

    51     This signal is specific to views with TBone. This signal is emitted when

    52     a new data set is available for the list section of the TBone. Currently,

    53     the only operation that can trigger this is the delete operation.

    54  */

    55 

    56 /*!

    57  Constructs the collection data model.

    58  */

    59 MpCollectionTBoneListDataModel::MpCollectionTBoneListDataModel( MpMpxCollectionData *data, QObject *parent )

    60     : QAbstractListModel(parent),

    61       mCollectionData(data),

    62       mRowCount(0)

    63 {

    64     TX_ENTRY

    65     connect( mCollectionData, SIGNAL(refreshAlbumSongs()),

    66              this, SLOT(refreshModel()) );

    67     connect( mCollectionData, SIGNAL(albumDataChanged()),

    68              this, SIGNAL(albumDataChanged()) );

    69     TX_EXIT

    70 }

    71 

    72 /*!

    73  Destructs the collection data model.

    74  */

    75 MpCollectionTBoneListDataModel::~MpCollectionTBoneListDataModel()

    76 {

    77     TX_LOG

    78 }

    79 

    80 /*!

    81  Returns the number of rows under the given \a parent.

    82 

    83  \reimp

    84  */

    85 int MpCollectionTBoneListDataModel::rowCount( const QModelIndex &parent ) const

    86 {

    87     TX_LOG

    88     Q_UNUSED(parent);

    89     return mRowCount;

    90 }

    91 

    92 /*!

    93  Returns the data stored for the item referred to by the \a index.

    94 

    95  \reimp

    96  */

    97 QVariant MpCollectionTBoneListDataModel::data(const QModelIndex &index, int role) const

    98 {

    99     TX_ENTRY

   100     QVariant returnValue = QVariant();

   101     if ( !index.isValid() ) {

   102         return returnValue;

   103     }

   104 

   105     int row = index.row();

   106     TX_LOG_ARGS("index=" << row << ", role=" << role);

   107     if ( role == Qt::DisplayRole ) {

   108         // Fetch the primary text, which is the title, if available.

   109         QString songTitle = mCollectionData->albumSongData(row, MpMpxCollectionData::Title);

   110         if ( !songTitle.isEmpty() ) {

   111             returnValue = songTitle;

   112         }

   113         else {

   114             returnValue = hbTrId("txt_mus_other_unknown4");

   115         }

   116     }

   117     TX_EXIT

   118     return returnValue;

   119 }

   120 

   121 /*!

   122  Slot to be called when data has changed and model needs to be refreshed

   123  to reflect the new data.

   124  */

   125 void MpCollectionTBoneListDataModel::refreshModel()

   126 {

   127     TX_ENTRY

   128     mRowCount = mCollectionData->albumSongsCount();

   129     reset();

   130     TX_EXIT

   131 }

   132