/*

* Copyright (c) 2010 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: Track List Widget for Music Player Media Wall.

*

*/

#include <QGraphicsLinearLayout>

#include <QGraphicsSceneMouseEvent>

#include <QBrush>

#include <hbframeitem.h>

#include <hbinstance.h>

#include <hbmainwindow.h>

#include "mptracklistwidget.h"

const int swipeAngleTolerance = 30; // angle is from 0 to 360

MpTrackListWidget::MpTrackListWidget( QGraphicsItem *parent ) : HbWidget( parent ) 

{

    mList = new HbListView( );

    QGraphicsLinearLayout   *layout = new QGraphicsLinearLayout( );

    layout->addItem( mList );

    setLayout( layout );

    grabGesture(Qt::SwipeGesture);

    mFrameItem = new HbFrameItem( this );

    mFrameItem->frameDrawer().setFrameType( HbFrameDrawer::NinePieces );

    //TODO: REMOVE PAINT and enable frame drawer when graphic is delibered.

    //mFrameItem->frameDrawer().setFrameGraphicsName( "qtg_fr_popup" );  

    mFrameItem->setZValue(-1);

}

/*!

    \reimp

 */

void MpTrackListWidget::resizeEvent(QGraphicsSceneResizeEvent *event)

{

    mFrameItem->setGeometry( rect() );

    HbWidget::resizeEvent( event );

}

/*!

    \reimp

 */

void MpTrackListWidget::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )

{

    Q_UNUSED( widget )

    Q_UNUSED( option )

    painter->setPen(Qt::darkGray);

    painter->setBrush(QBrush(Qt::gray ));

    painter->drawRoundedRect( rect(), 4.0 , 4.0 );

}

/*!

    \reimp

 */

void MpTrackListWidget::gestureEvent(QGestureEvent *event)

{

    QGesture* gesture = event->gesture(Qt::SwipeGesture);

    if (gesture) {

        QSwipeGesture* swipe = static_cast<QSwipeGesture *>(gesture);

        if (swipe->state() == Qt::GestureFinished && 

                swipeAngleToDirection (swipe->swipeAngle()) == QSwipeGesture::Left ) {

            //Left gesture is the direction in wich the track list slides to close.

            emit close();

            event->accept(Qt::SwipeGesture);

        }

    }    

}

/*!

    Returns the HbListView instance.

 */

HbListView *MpTrackListWidget::list()

{

    return mList;

} 

/*!

    Maps swipe angle to SwipeDirection based on a tolerance parameter and orientation.

 */

QSwipeGesture::SwipeDirection MpTrackListWidget::swipeAngleToDirection(

        int angle)

{

    int delta = swipeAngleTolerance;

    if ( hbInstance->allMainWindows()[0]->orientation() == Qt::Horizontal ) {

        //correction for transformation on rotation.

        angle += ( angle < 90 ) ? 270 : -90;  

    }

    QSwipeGesture::SwipeDirection direction(QSwipeGesture::NoDirection);

    if ((angle > 90-delta) && (angle < 90+delta)) {

        direction = QSwipeGesture::Up;

    } else if ((angle > 270-delta) && (angle < 270+delta)) {

        direction = QSwipeGesture::Down;

    } else if (((angle >= 0) && (angle < delta)) 

            || ((angle > 360-delta) && (angle <= 360))) {

        direction = QSwipeGesture::Right;

    } else if ((angle > 180-delta) && (angle < 180+delta)) {

        direction = QSwipeGesture::Left;

    }

    return direction;    

}

/*!

    \reimp

 */

void MpTrackListWidget::mousePressEvent( QGraphicsSceneMouseEvent *event )

{

    if ( event->button() == Qt::LeftButton ) {

        event->accept();

    }

    else {

        event->ignore();

    }

}

/*!

    \reimp

 */

void MpTrackListWidget::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)

{

    if ( event->button() == Qt::LeftButton ) {

        event->accept();

    }

    else {

        event->ignore();

    }

}