/*

* 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 container definition - Albums.

*

*/

#include <QtCore>

#include <hbdocumentloader.h>

#include <hblistview.h>

#include <hbgroupbox.h>

#include <hbindexfeedback.h>

#include <hgmediawall.h>

#include "mpcollectioncontaineralbums.h"

#include "mpmpxcollectiondata.h"

#include "mpcollectiondatamodel.h"

#include "mpcollectiontbonelistdatamodel.h"

#include "mptrace.h"

#include "mpenginefactory.h"

/*!

    \class MpCollectionContainerAlbums

    \brief Music Player collection container definition - Albums.

    'Albums' collection container implements the interface specified

    by MpCollectionContainer. It provides a layout and widgets for the

    'Albums' view.

    This container handles the following contexts:

    \li ECollectionContextAlbums

    \li ECollectionContextAlbumsTBone

    \sa MpCollectionContainer

*/

/*!

 Constructs the collection container.

 */

MpCollectionContainerAlbums::MpCollectionContainerAlbums( HbDocumentLoader *loader, QGraphicsItem *parent )

    : MpCollectionListContainer(loader, parent),

      mTBone(0),

      mTBoneListModel(0),

      mCurrentAlbumIndex(0)

{

    TX_LOG

    mCollectionContext = ECollectionContextAlbums;

}

/*!

 Destructs the collection container.

 */

MpCollectionContainerAlbums::~MpCollectionContainerAlbums()

{

    TX_ENTRY

	delete mTBone;

    delete mList;

    delete mTBoneListModel;

    TX_EXIT

}

/*!

 Sets the data model for the container.

 */

void MpCollectionContainerAlbums::setDataModel( MpCollectionDataModel *dataModel )

{

    TX_ENTRY

    MpCollectionContainer::setDataModel(dataModel);

    if ( mCollectionContext == ECollectionContextAlbums ) {

        if ( mList ) {

            mList->setModel(dataModel);

            if ( mCollectionData->count() ) {

                mList->scrollTo( dataModel->index(mCurrentAlbumIndex, 0) );

            }

        }

    }

    else if ( mCollectionContext == ECollectionContextAlbumsTBone ) {

        if ( mTBone ) {

            mTBone->setModel(dataModel);

            mTBone->scrollTo( dataModel->index(mCurrentAlbumIndex, 0) );

            if ( mTBoneListModel == 0 ) {

                mTBoneListModel = new MpCollectionTBoneListDataModel(mCollectionData, MpEngineFactory::sharedEngine()->playbackData());

                connect( mTBoneListModel, SIGNAL(albumDataChanged()), this, SLOT(albumDataChanged()) );

                connect( mTBoneListModel, SIGNAL(albumDataAvailable()), this, SLOT(albumDataAvailable()) );

            }

            mList->setModel(mTBoneListModel);

            if ( mCollectionData->setCurrentAlbum(mCurrentAlbumIndex) ) {

                if ( mCollectionData->albumSongsCount() > 1 ) {

                    emit shuffleEnabled(true);

                }

                else {

                    emit shuffleEnabled(false);

                }

            }

            else {

                emit findAlbumSongs(mCurrentAlbumIndex);

                emit shuffleEnabled(false);

            }

        }

    }

    TX_EXIT

}

/*!

 Slot to be called when an item is selected by the user.

*/

void MpCollectionContainerAlbums::itemActivated( const QModelIndex &index )

{

    if ( mCollectionContext == ECollectionContextAlbums ) {

        mCurrentAlbumIndex = index.row();

        TX_ENTRY_ARGS("mCurrentAlbumIndex=" << mCurrentAlbumIndex);

        MpCollectionListContainer::itemActivated(index);

    }

    else if ( mCollectionContext == ECollectionContextAlbumsTBone ) {

        int row = index.row();

        TX_ENTRY_ARGS("index=" << row);

        if ( mViewMode == MpCommon::FetchView ) {

            MpCollectionListContainer::itemActivated(index);

        }

        else {

            emit playAlbumSongs(mCurrentAlbumIndex, row);

        }

    }

    TX_EXIT

}

/*!

 Slot to be called when scrolling ends in media wall and an album is centered.

 */

void MpCollectionContainerAlbums::albumCentered( const QModelIndex &index )

{

    TX_ENTRY

    if ( mCurrentAlbumIndex != index.row() ) {

        // Prevent reloading if user just moves the center album a little

        // and the same album re-centers.

        mCurrentAlbumIndex = index.row();

        TX_LOG_ARGS("mCurrentAlbumIndex=" << mCurrentAlbumIndex);

        if ( mCollectionData->setCurrentAlbum(mCurrentAlbumIndex) ) {

            if ( mCollectionData->albumSongsCount() > 1 ) {

                emit shuffleEnabled(true);

            }

            // Enable context menu

            mLongPressEnabled = true;

        }

        else {

            emit findAlbumSongs(mCurrentAlbumIndex);

        }

    }

    else {

        // Landed on the same album. Just update menu.

        if ( mCollectionData->albumSongsCount() > 1 ) {

            emit shuffleEnabled(true);

        }

        // Enable context menu

        mLongPressEnabled = true;

    }

    TX_EXIT

}

/*!

 Slot to be called data model has new data.

 Two cases:

     1) User deleted an album.

	 2) User deleted last song in an album.

 */

void MpCollectionContainerAlbums::dataReloaded()

{

    TX_ENTRY

    if ( mCollectionContext == ECollectionContextAlbumsTBone ) {

        if ( mCurrentAlbumIndex > 0 ) {

            --mCurrentAlbumIndex;

        }

        mTBone->scrollTo( mDataModel->index(mCurrentAlbumIndex, 0) );

        if ( mCollectionData->setCurrentAlbum(mCurrentAlbumIndex) ) {

            if ( mCollectionData->albumSongsCount() == 1 ) {

                emit shuffleEnabled(false);

            }

        }

        else {

            emit findAlbumSongs(mCurrentAlbumIndex);

        }

    }

    else {

        MpCollectionListContainer::dataReloaded();

    }

    TX_EXIT

}

/*!

 Slot to be called data model has new data.

 User has deleted one of the songs from TBone list.

 */

void MpCollectionContainerAlbums::albumDataChanged()

{

    TX_ENTRY

    emit findAlbumSongs(mCurrentAlbumIndex);

    emit shuffleEnabled(false);

    TX_EXIT

}

/*!

 Slot to be called TBone starts scrolling.

 */

void MpCollectionContainerAlbums::scrollingStarted()

{

    TX_ENTRY

    // Disable shuffle action from the menu

    emit shuffleEnabled(false);

    // Disable context menu

    mLongPressEnabled = false;

    TX_EXIT

}

/*!

 Slot to be called album data is available. This is a result of findAlbumSongs signal.

 */

void MpCollectionContainerAlbums::albumDataAvailable()

{

    TX_ENTRY

    int count = mCollectionData->albumSongsCount();

    if ( count > 1 ) {

        emit shuffleEnabled(true);

    }

    // Enable context menu

    mLongPressEnabled = true;

    TX_EXIT

}

/*!

 Sets up the container by organizing widgets according to its layout.

 \reimp

 */

void MpCollectionContainerAlbums::setupContainer()

{

    TX_ENTRY_ARGS("mCollectionContext=" << mCollectionContext);

    mDocumentLoader->load(QString(":/docml/musiccollection.docml"), "showInfoBar");

    if ( mCollectionData->count() ) {

        bool ok = false;

        QGraphicsWidget *widget;

        if ( mCollectionContext == ECollectionContextAlbums ) {

            mDocumentLoader->load(QString(":/docml/musiccollection.docml"), "albums", &ok);

            if ( !ok ) {

                TX_LOG_ARGS("Error: invalid xml file.");

                Q_ASSERT_X(ok, "MpCollectionContainerAlbums::setupContainer", "invalid xml file");

            }

            if ( !mList ) {

                widget = mDocumentLoader->findWidget(QString("albumsList"));

                mList = qobject_cast<HbListView*>(widget);

                mIndexFeedback->setItemView(mList);

                initializeList();

            }

            if ( mTBone ) {

                delete mTBone;

                mTBone = 0;

            }

            mInfoBar->setHeading(hbTrId("txt_mus_subhead_albums_1l").arg(mCollectionData->count()));

        }

        else if ( mCollectionContext == ECollectionContextAlbumsTBone ) {

            if ( mViewMode == MpCommon::FetchView ) {

                mDocumentLoader->load(QString(":/docml/musiccollection.docml"), "albumTBoneFetcher", &ok);

                if ( !ok ) {

                    TX_LOG_ARGS("Error: invalid xml file.");

                    Q_ASSERT_X(ok, "MpCollectionContainerAlbums::setupContainer", "invalid xml file");

                }

                mInfoBar->setHeading(hbTrId("txt_mus_subtitle_select_song"));

            }

            else {

                mDocumentLoader->load(QString(":/docml/musiccollection.docml"), "albumTBone", &ok);

                if ( !ok ) {

                    TX_LOG_ARGS("Error: invalid xml file.");

                    Q_ASSERT_X(ok, "MpCollectionContainerAlbums::setupContainer", "invalid xml file");

                }

                mDocumentLoader->load(QString(":/docml/musiccollection.docml"), "hideInfoBar");

            }

            widget = mDocumentLoader->findWidget(QString("albumWall"));

            mTBone = qobject_cast<HgMediawall*>(widget);

            HbIcon defaultIcon( "qtg_large_album_art" );

            defaultIcon.setSize(mTBone->itemSize());

            mTBone->setDefaultImage( defaultIcon.pixmap().toImage() );

            mTBone->setScrollBarPolicy( HgWidget::ScrollBarAlwaysOff );

            connect( mTBone, SIGNAL(scrollingStarted()), this, SLOT(scrollingStarted()) );

            connect( mTBone, SIGNAL(animationAboutToEnd(QModelIndex)), this, SLOT(albumCentered(QModelIndex)) );

        }

    }

    else {

        // Must delete widgets when last song is deleted and view is reloaded.

        if ( mTBone ) {

            delete mTBone;

            mTBone = 0;

        }

        mInfoBar->setHeading(hbTrId("txt_mus_subhead_albums_1l").arg(0));

        // Call empty list from base class

        setupEmptyListContainer();

    }

    TX_EXIT

}