/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbslidertrackitem_p.h"

#include "hbframedrawer.h"

#include <QPainter>

#include <QWidget>

HbSliderTrackItem::HbSliderTrackItem(QGraphicsItem* parent)

            :HbFrameItem(parent)

{

    minimum = 0;

    maximum = 0;

    value = 0;

    maskWidth = 0;

    trackSpan = 0;

    setMask   = true;

}

HbSliderTrackItem::HbSliderTrackItem(HbFrameDrawer *drawer, QGraphicsItem *parent)

    :HbFrameItem(drawer,parent)

{

    minimum = 0;

    maximum = 0;

    value = 0;

    maskWidth = 0;

    trackSpan = 0;

    setMask   = true;

}

void HbSliderTrackItem::setMinimum(int min)

{

    if ( minimum != min ) {

        minimum = min;

        setMask = true;

    }

}

void HbSliderTrackItem::setMaximum(int max )

{

    if ( maximum != max ) {

        maximum = max;

        setMask = true;

    }

}

void HbSliderTrackItem::setValue(int val )

{

    if ( value != val ) {

        value = val;

        setMask = true;

    }

}

void HbSliderTrackItem::setInverted(bool inv)

{

    if ( inverted != inv ) {

        inverted = inv;

        setMask = true;

    }

}

void HbSliderTrackItem::setMaskWidth(qreal width)

{

    if ( maskWidth != width ) {

        maskWidth = width;

        setMask = true;

    }

}

void HbSliderTrackItem::setOrientation(Qt::Orientation orientation)

{

    if ( mOrientation != orientation ) {

        mOrientation = orientation;

        setMask = true;

    }

}

void HbSliderTrackItem::setSpan( qreal span )

{

    if ( trackSpan != span ) {

        trackSpan = span;

        setMask = true;

    }

}

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

{

    if ( setMask ) {

        QSize size = boundingRect().size().toSize();

        QPixmap mask(size);

        mask.fill(Qt::white);

        QPainter p;

        p.begin(&mask);

        p.setBrush(QBrush(Qt::black));

        if(maximum != minimum) {

            if(maskWidth == 0) {

                if(mOrientation == Qt::Horizontal){

                    qreal left = (qreal)boundingRect().topLeft().x();

                    if(inverted) {

                        left = (qreal)boundingRect().width()* ((maximum - value)/(qreal) (maximum - minimum));

                    }

                    if ( layoutDirection() == Qt::RightToLeft ) {

                        p.drawRect(QRectF(

                            left,

                            (qreal)boundingRect().topLeft().y(),

                            (qreal)boundingRect().width()* ((value -  minimum)/(qreal) (maximum - minimum)),

                            (qreal)boundingRect().height()));

                    }

                    else {

                        p.drawRect(QRectF(

                            left,

                            (qreal)boundingRect().topLeft().y(),

                            (qreal)trackSpan* ((value -  minimum)/(qreal) (maximum - minimum)),

                            (qreal)boundingRect().height()));

                    }

                }

                else{

                    qreal start = boundingRect().bottom() -(qreal)trackSpan*((value -  minimum)/(qreal) (maximum - minimum));

                    qreal end = boundingRect().bottom();

                    if(inverted) {

                        start = boundingRect().top();

                        end = start+(qreal)trackSpan*((value -  minimum)/(qreal) (maximum - minimum));

                    }

                    p.drawRect(QRectF(

                        (qreal)boundingRect().topLeft().x(),

                        start,

                        (qreal)boundingRect().width(),

                        end ));

                }

            }

        }

        p.end();        

        frameDrawer().setMask(mask); 

        setMask = false; 

    }

    HbFrameItem::paint(painter,option,widget);

}

 /*!

    \reimp

 */

void HbSliderTrackItem::changeEvent(QEvent *event)

{

    HbFrameItem::changeEvent( event );   

    if ( event->type() == QEvent::LayoutDirectionChange ) {

        setMask = true;

    }

}