/*

* 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 now playing widget - Private.

*

*/

#include <QPainter>

#include <QGraphicsSceneMouseEvent>

#include <hbstackedlayout.h>

#include <hblabel.h>

#include <hbicon.h>

#include <hbiconitem.h>

#include <hbdocumentloader.h>

#include <hbinstance.h>

#include "mpnowplayingwidget_p.h"

#include "mpnowplayingwidget.h"

#include "mpnowplayingbackend.h"

#include "mptrace.h"

const char *NOW_PLAYING_XML = ":/xml/nowplaying.docml";

/*!

    \internal

    \class MpNowPlayingWidgetPrivate

    \brief Custom HB widget that displays currently playing song information.

    This is a composite widget made out of HB widgets, it displays information

    for the current playing song on the playback engine indicated at

    construction time.

*/

/*!

 \internal

 Constructs the now playing widget private.

 */

MpNowPlayingWidgetPrivate::MpNowPlayingWidgetPrivate(long int playerId, MpNowPlayingWidget *qq )

    : q_ptr( qq ),

      mPrimaryText(0),

      mSecondaryText(0),

      mState( NotPlaying ),

      mIcon(0),

      mDocumentLoader(0)

{

    TX_ENTRY_ARGS( "Player ID =" << playerId << " Q pointer=" << ( void * )qq )

    QGraphicsWidget *widget;

    bool widgetsOk = false;

    mPlayIcon = new HbIcon( QString(":/icons/play.png"));

    mPauseIcon = new HbIcon( QString(":/icons/pause.png"));

    mDocumentLoader = new HbDocumentLoader();

    if (mDocumentLoader) {

            mDocumentLoader->load( NOW_PLAYING_XML, &widgetsOk);

    }

    if (widgetsOk) {

        // find the main widget container and all of its child items

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

        HbWidget* container = qobject_cast<HbWidget*>(widget);

        container->setParentItem(q_ptr);

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

        mPrimaryText = qobject_cast<HbLabel*>(widget);

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

        mSecondaryText = qobject_cast<HbLabel*>(widget);

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

        mIcon = qobject_cast<HbLabel*>(widget);

        HbStackedLayout *mylayout;

        mylayout = new HbStackedLayout(q_ptr);

        mylayout->addItem( container );

        q_ptr->setLayout( mylayout );

    }

    else {

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

        Q_ASSERT_X(widgetsOk, "MpNowPlayingWidgetPrivate", "invalid xml file");

    }

    mBackEnd = new MpNowPlayingBackEnd( playerId );

    setEnabled(true);

    TX_EXIT

}

/*!

 \internal

 Destructs the now playing widget private.

 */

MpNowPlayingWidgetPrivate::~MpNowPlayingWidgetPrivate()

{

    TX_ENTRY

    delete mBackEnd;

    delete mPlayIcon;

    delete mPauseIcon;

    delete mDocumentLoader;

    TX_EXIT

}

/*!

 If \a enabled is true, the item is enabled; otherwise, it is disabled.

 Item is enabled by default.

 */

void MpNowPlayingWidgetPrivate::setEnabled( bool enabled )

{

    if ( enabled ) {

        connect( mBackEnd, SIGNAL(stateUpdate(SimplifiedPlayerState)),

                 this, SLOT(setState(SimplifiedPlayerState)) );

        connect( mBackEnd, SIGNAL(titleChanged(QString)),

                 mPrimaryText, SLOT(setPlainText(QString)) );

        connect( mBackEnd, SIGNAL(artistChanged(QString)),

                 mSecondaryText, SLOT(setPlainText(QString)) );

        mBackEnd->update();

    }

    else {

        disconnect( mBackEnd, SIGNAL(stateUpdate(SimplifiedPlayerState)),

                    this, SLOT(setState(SimplifiedPlayerState)) );

        disconnect( mBackEnd, SIGNAL(titleChanged(QString)),

                    mPrimaryText, SLOT(setPlainText(QString)) );

        disconnect( mBackEnd, SIGNAL(artistChanged(QString)),

                    mSecondaryText, SLOT(setPlainText(QString)) );

    }

}

/*!

 \internal

 Offers click \a event to the widget privated side, if event is consumed it returns true.

 */

bool MpNowPlayingWidgetPrivate::handleClickEvent(QGraphicsSceneMouseEvent *event)

{

    if ( mIcon->windowFrameGeometry().contains( event->pos() ) ) {

        mBackEnd->playPause();

        return true;

    }

    else {

       return false;

   }

}

/*!

 \internal

 Sets the simplified playback \a state.

 */

void MpNowPlayingWidgetPrivate::setState( SimplifiedPlayerState state )

{

    TX_ENTRY_ARGS( "State = " << state )

    switch ( state ) {

        case NotPlaying:

            if ( mState != NotPlaying )

                emit q_ptr->playbackAttachmentChanged( false );

            break;

        case Playing:

            mIcon->setIcon(*mPauseIcon);

            if (mState == NotPlaying)

                emit q_ptr->playbackAttachmentChanged( true );

            break;

        case Paused:

            mIcon->setIcon(*mPlayIcon);

            if (mState == NotPlaying)

                emit q_ptr->playbackAttachmentChanged( true );

            break;

        default:

            break;

    }

    mState = state;

    TX_EXIT

}