/*

* 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 <hbstyleloader.h>

#include "mpenginefactory.h"

#include "mpnowplayingwidget_p.h"

#include "mpnowplayingwidget.h"

#include "mptrace.h"

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

const char *NOW_PLAYING_CSS = ":/css/banner_color.css";

/*!

    \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( MpNowPlayingWidget *qq )

    : q_ptr( qq ),

      mPrimaryText(0),

      mSecondaryText(0),

      mState( MpPlaybackData::NotPlaying ),

      mPlaybackData(0),

      mMpEngine(0),

      mIcon(0),

      mDocumentLoader(0),

      mCurrentPressedState( BannerNone )

{

    TX_ENTRY_ARGS( " Q pointer=" << ( void * )qq )

    QGraphicsWidget *widget;

    bool widgetsOk = false;

    HbStyleLoader::registerFilePath(NOW_PLAYING_CSS);  

    mPlayIcon = new HbIcon( QString( "qtg_mono_play" ) );

    mPauseIcon = new HbIcon( QString( "qtg_mono_pause" ) );

    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);

        mPrimaryText->setObjectName( "bannerLabel" );

        mPrimaryText->setProperty( "state", "normal" );

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

        mSecondaryText = qobject_cast<HbLabel*>(widget);

        mSecondaryText->setObjectName( "bannerLabel" );

        mSecondaryText->setProperty( "state", "normal" );

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

        mIcon = qobject_cast<HbLabel*>(widget);

        mIcon->setObjectName( "bannerLabel" );

        mIcon->setProperty( "state", "normal" );

        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");

    }

    mMpEngine = MpEngineFactory::sharedEngine();

    mPlaybackData = mMpEngine->playbackData();

    setEnabled(true);

    TX_EXIT

}

/*!

 \internal

 Destructs the now playing widget private.

 */

MpNowPlayingWidgetPrivate::~MpNowPlayingWidgetPrivate()

{

    TX_ENTRY

    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( mPlaybackData, SIGNAL( playbackStateChanged() ),

                 this, SLOT( setState() ) );

        connect( mPlaybackData, SIGNAL( playbackInfoChanged() ),

                 this, SLOT( updateBannerInfo() ) );

    setState();

    updateBannerInfo();

    }

    else {

        disconnect( mPlaybackData, SIGNAL( playbackStateChanged() ),

                 this, SLOT( setState() ) );

        disconnect( mPlaybackData, SIGNAL( playbackInfoChanged() ),

                 this, SLOT( updateBannerInfo() ) );

    }

}

/*!

 Return if banner is attached based on current playback state

 */

bool MpNowPlayingWidgetPrivate::isBannerAttached()

{

    return mState == MpPlaybackData::NotPlaying ? false : true;

}

/*!

 \internal

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

 */

bool MpNowPlayingWidgetPrivate::handleClickEvent(QGraphicsSceneMouseEvent *event)

{

    bool ret = true;

    if ( mCurrentPressedState != BannerNone ) {

        //Widget was previosly pressed, handle the event.

        QRectF geometry = q_ptr->rect();

        qreal delta = mIcon->windowFrameGeometry().top() - geometry.top();

        QRectF iconTouchRect( mIcon->windowFrameGeometry() );

        iconTouchRect.adjust( -delta, -delta, delta, delta );

        if ( iconTouchRect.contains( event->pos() ) ) {

            if ( mCurrentPressedState == BannerIcon ) {

                    // click on play/pause

                mMpEngine->playPause();

            }

        }

        else if ( mCurrentPressedState == BannerLabels && geometry.contains( event->pos() )){

            // click somewhere else on the widget.

            ret = false;

        }

        /*else {

        // click outside the widget.

        }*/

        mCurrentPressedState = BannerNone;

    }

    return ret;

}

/*!

 \internal

 Changes text and icon color when \a pressed

 */

void MpNowPlayingWidgetPrivate::handleMousePressEvent(QGraphicsSceneMouseEvent *event, bool pressed)

{   

    QRectF geometry = q_ptr->rect();

    qreal delta = mIcon->windowFrameGeometry().top() - geometry.top();

    QRectF iconTouchRect( mIcon->windowFrameGeometry() );

    iconTouchRect.adjust( -delta, -delta, delta, delta );

    if( iconTouchRect.contains( event->pos() ) &&  pressed ) {  

        if( mCurrentPressedState == BannerNone ) {

            mCurrentPressedState = BannerIcon;

        }

        mIcon->setProperty( "state", "pressed" );

    }

    else if( geometry.contains( event->pos() ) && pressed ){

        if( mCurrentPressedState == BannerNone ) {

            mCurrentPressedState = BannerLabels;

        }

        mPrimaryText->setProperty( "state", "pressed" );

        mSecondaryText->setProperty( "state", "pressed" );

    }

    else { 

        mIcon->setProperty( "state", "normal" );

        mPrimaryText->setProperty( "state", "normal" );

        mSecondaryText->setProperty( "state", "normal" );

    }

}

/*!

 \internal

 Changes text and icon color when moved

 */

void MpNowPlayingWidgetPrivate::handleMouseMoveEvent(QGraphicsSceneMouseEvent *event)

{   

    QRectF geometry = q_ptr->rect();

    qreal delta = mIcon->windowFrameGeometry().top() - geometry.top();

    QRectF iconTouchRect( mIcon->windowFrameGeometry() );

    iconTouchRect.adjust( -delta, -delta, delta, delta );

    if( iconTouchRect.contains( event->pos() ) ) {  

        if( mCurrentPressedState == BannerIcon ) {

            mIcon->setProperty( "state", "pressed" );

        }

        else {

            mIcon->setProperty( "state", "normal" );

        }

        mPrimaryText->setProperty( "state", "normal" );

        mSecondaryText->setProperty( "state", "normal" );

    }

    else if( geometry.contains( event->pos() ) &&  mCurrentPressedState == BannerLabels ){

        mPrimaryText->setProperty( "state", "pressed" );

        mSecondaryText->setProperty( "state", "pressed" );

        mIcon->setProperty( "state", "normal" );

    }

    else { 

        mIcon->setProperty( "state", "normal" );

        mPrimaryText->setProperty( "state", "normal" );

        mSecondaryText->setProperty( "state", "normal" );

    }

}

/*!

 \internal

 Sets the simplified playback \a state.

 */

void MpNowPlayingWidgetPrivate::setState( )

{

    MpPlaybackData::SimplifiedState state = mPlaybackData->playbackState();

    TX_ENTRY_ARGS( "State = " << state )

    switch ( state ) {

        case MpPlaybackData::NotPlaying:

            if ( mState != MpPlaybackData::NotPlaying )

                emit q_ptr->playbackAttachmentChanged( false );

            break;

        case MpPlaybackData::Playing:

            mIcon->setIcon( *mPauseIcon );

            mIcon->setProperty( "state", mIcon->property("state").toString() );

            if ( mState == MpPlaybackData::NotPlaying )

                emit q_ptr->playbackAttachmentChanged( true );

            break;

        case MpPlaybackData::Paused:

        case MpPlaybackData::Stopped:    

            mIcon->setIcon( *mPlayIcon );

            mIcon->setProperty( "state", mIcon->property("state").toString() );

            if ( mState == MpPlaybackData::NotPlaying )

                emit q_ptr->playbackAttachmentChanged( true );

            break;

        default:

            break;

    }

    mState = state;

    TX_EXIT

}

/*!

 \internal

 Sets the \a title 

 */

void MpNowPlayingWidgetPrivate::updateBannerInfo()

{

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

    mPrimaryText->setProperty( "state", mPrimaryText->property("state").toString() );

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

    mSecondaryText->setProperty( "state", mSecondaryText->property("state").toString() );

}