/*

* 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: Playback widget for Music Player playback view.

*

*/

#include <qtime>

#include <hbprogressslider.h>

#include <hbinstance.h>

#include <hblabel.h>

#include <hbfontspec.h>

#include <hbdocumentloader.h>

#include <hbstackedlayout.h>

#include "mpplaybackwidget.h"

#include "mpplaybackdata.h"

#include "mptrace.h"

const unsigned int KMicroSecToMiliSec( 1000 );

/*!

    \class MpPlaybackWidget

    \brief Music Player playback widget.

    This widget displays playback information on the playback view.

*/

/*!

    \fn void setPlaybackPosition(int value)

    This signal is emitted when the user drags the progressbar to a new

    position, \a value indicates the position.

 */

/*!

 Constructs the collection view plugin.

 */

MpPlaybackWidget::MpPlaybackWidget(MpPlaybackData *data, QGraphicsItem *parent )

    : HbWidget(parent),

      mPlaybackData(data),

      mDocumentLoader(0),

      mProgreesBarDragging(false),

      mDuration(0)

{

    TX_ENTRY

    mLayout = new HbStackedLayout(this);

    mLayout->setContentsMargins( 0.0, 0.0, 0.0, 0.0 );

    mLayout->setMinimumSize( 0.0, 0.0 );

    setLayout( mLayout );

    bool widgetsOk = false;

    bool layoutOk = false;

    mDocumentLoader = new HbDocumentLoader();

    HbMainWindow *mainWindow = hbInstance->allMainWindows()[0];

    if ( mDocumentLoader ) {

        mDocumentLoader->load( QString(":/playbackviewdocml/playbackwidget.docml"), &widgetsOk);

        layoutOk = loadLayout( mainWindow->orientation() );

    }

    if ( widgetsOk && layoutOk ) {

        QGraphicsWidget *tmpWidgetPtr;

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("playbackWidgetContainer"));

        tmpWidgetPtr->setParentItem(this);

        mLayout->addItem( qobject_cast<HbWidget*>( tmpWidgetPtr ) );

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("albumText"));

        mAlbumName = qobject_cast<HbLabel*>(tmpWidgetPtr);

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("artistText"));

        mArtistName = qobject_cast<HbLabel*>(tmpWidgetPtr);

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("songText"));

        mSongTitle = qobject_cast<HbLabel*>(tmpWidgetPtr);

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("albumArt"));

        mAlbumArt = qobject_cast<HbLabel*>(tmpWidgetPtr);

        tmpWidgetPtr = mDocumentLoader->findWidget(QString("progressBar"));

        mProgressBar = qobject_cast<HbProgressSlider*>(tmpWidgetPtr);

        //TODO: move this to docml when supported.

        mProgressBar->setMinMaxTextVisible(true);

    }

    else {

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

        Q_ASSERT_X(widgetsOk, "MpPlaybackWidget", "invalid xml file - widget");

        Q_ASSERT_X(layoutOk, "MpPlaybackWidget", "invalid xml file - layout");

    }

    connect( mainWindow, SIGNAL(orientationChanged(Qt::Orientation)),

             this, SLOT(loadLayout(Qt::Orientation)) );

    connect( mProgressBar, SIGNAL(sliderPressed()), this, SLOT(handleSliderPressed()) );

    connect( mProgressBar, SIGNAL(sliderReleased()), this, SLOT(handleSliderReleased()) );

    connect( mProgressBar, SIGNAL(sliderMoved(int)), this, SLOT(handleSliderMoved(int)) );

    connect( mPlaybackData, SIGNAL(playbackInfoChanged()), this, SLOT(playbackInfoChanged()) );

    connect( mPlaybackData, SIGNAL(durationChanged()), this, SLOT(durationChanged()) );

    connect( mPlaybackData, SIGNAL(positionChanged()), this, SLOT(positionChanged()) );

    connect( mPlaybackData, SIGNAL(albumArtReady()), this, SLOT(albumArtChanged()) );

    mCompositePixmap = QPixmap( 360, 360 );

    mCompositePixmap.fill( Qt::transparent );

    TX_EXIT

}

/*!

 Constructs the collection view plugin.

 */

MpPlaybackWidget::~MpPlaybackWidget()

{

    TX_ENTRY

    delete mDocumentLoader;

    TX_EXIT

}

/*!

 Slot to handle playback info changed.

 */

void MpPlaybackWidget::playbackInfoChanged( )

{

    TX_ENTRY

    mSongTitle->setPlainText( mPlaybackData->title() );

    mArtistName->setPlainText( mPlaybackData->artist() );

    mAlbumName->setPlainText( mPlaybackData->album() );

    TX_EXIT

}

/*!

 Slot to handle playback duration changed.

 */

void MpPlaybackWidget::durationChanged()

{

    TX_ENTRY

    mDuration = mPlaybackData->duration();

    mDuration /= KMicroSecToMiliSec;

    mProgressBar->setRange(0, mDuration);

    mProgressBar->setProgressValue(0);

    mProgressBar->setSliderValue(0);

    mProgressBar->setEnabled(true);

    TX_EXIT

}

/*!

 Slot to handle playback position changed.

 */

void MpPlaybackWidget::positionChanged()

{

    TX_ENTRY

    int position = mPlaybackData->position();

    position /= KMicroSecToMiliSec;

    if ( !mProgreesBarDragging ) {

        mProgressBar->setProgressValue(position);

        mProgressBar->setSliderValue(position);

        mProgressBar->setMinText( formatDuration(position) );

        mProgressBar->setMaxText( formatDuration(mDuration  - position) );

    }

    TX_EXIT

}

/*!

 Slot to handle Album art changed.

 */

void MpPlaybackWidget::albumArtChanged( )

{

    TX_ENTRY

    QPixmap pixmap;

    mPlaybackData->albumArt( pixmap );

    composeAlbumCover( pixmap );

    QIcon qicon;

    if ( !mCompositePixmap.isNull() ) {

        qicon = QIcon( mCompositePixmap );

    }

    else {

        qicon = QIcon( pixmap );

    }

    HbIcon icon( qicon );

    mAlbumArt->setIcon( icon );

    TX_EXIT

}

/*!

 Orientation change. Load layout based on the \a orientation.

 */

bool MpPlaybackWidget::loadLayout( Qt::Orientation orientation )

{

    bool ret(false);

    if ( orientation == Qt::Vertical ) {

        mDocumentLoader->load(QString(":/playbackviewdocml/playbackwidget.docml"), "portrait", &ret);

    }

    else {

        mDocumentLoader->load(QString(":/playbackviewdocml/playbackwidget.docml"), "landscape", & ret);

    }

    return ret;

}

/*!

 Slot to handle slider pressed.

 */

void MpPlaybackWidget::handleSliderPressed()

{

    TX_LOG

    mProgreesBarDragging = true;

}

/*!

 Slot to handle progressbar relesed.

 */

void MpPlaybackWidget::handleSliderReleased()

{

    TX_ENTRY

    mProgreesBarDragging = false;

    emit setPlaybackPosition( KMicroSecToMiliSec * mProgressBar->progressValue() );

    TX_EXIT

}

/*!

 Slot to handle progressbar moved.

 */

void MpPlaybackWidget::handleSliderMoved( int value )

{

    TX_ENTRY_ARGS( "value  =" << value )

    mProgressBar->setProgressValue(value);

    mProgressBar->setSliderValue(value);

    mProgressBar->setMinText( formatDuration(value) );

    mProgressBar->setMaxText( formatDuration(mDuration  - value) );

    if ( !mProgreesBarDragging ) {

        // Click on the progress bar, not a drag.

        emit setPlaybackPosition( KMicroSecToMiliSec * value );

    }

    TX_EXIT

}

/*!

 Returns the formated duration defined in \a seconds.

 */

QString MpPlaybackWidget::formatDuration( int seconds )

{

    TX_ENTRY

    QTime z(0,0,0,0);

    QTime duration;

    duration = z.addSecs( seconds );

    int hour = seconds / 3600;

    if ( hour == 0 ) {

        TX_EXIT

        return duration.toString( "mm:ss" );

    }

    else {

        TX_EXIT

        return duration.toString( "hh:mm:ss" );

    }

}

/*!

 Compose the album art.

 */

void MpPlaybackWidget::composeAlbumCover( QPixmap& albumart )

{

    TX_ENTRY

    mCompositePixmap.fill( Qt::transparent );

    QPainter painter(&mCompositePixmap);

    painter.setCompositionMode(QPainter::CompositionMode_Clear);

    painter.setCompositionMode(QPainter::CompositionMode_SourceOver);

    painter.fillRect(mCompositePixmap.rect(), Qt::transparent);

    painter.drawPixmap(QRect(0, 0,360,360), albumart);

    TX_EXIT

}