/****************************************************************************
**
** 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 HbWidgets 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 <hbprogressslider.h>
#include "hbprogressslider_p.h"

#include <hbstyleoptionprogressslider_p.h>
#include <hbtooltip.h>
#include <hbwidgetfeedback.h>
#include "hbglobal_p.h"

#include <QGraphicsSceneMouseEvent>
#include <QApplication>

#ifdef HB_EFFECTS
#include <hbeffect.h>
#include "hbeffectinternal_p.h"
#define HB_PRGRESSSLIDER_ITEM_TYPE "HB_PROGRESSSLIDER"
#endif

HbProgressSliderPrivate::HbProgressSliderPrivate()
{
    mDownState=false;
    handle = 0;
    mSliderValue = 0;
    mHandlePath = QString();
}

HbProgressSliderPrivate::~HbProgressSliderPrivate()
{
    if (handle) {
        delete handle;
    }
}

void HbProgressSliderPrivate::setProgressValue(int value)
{
   Q_Q(HbProgressSlider);
   if (mProgressValue == value) {
        return;
    }
    if (value >= mMaximum) {
        value = mMaximum;
#ifdef HB_EFFECTS
       // HbEffect::start(mTrack, HB_PRGRESSSLIDER_ITEM_TYPE, "progressbar_progress_complete");
#endif
    }
    else if (value < mMinimum) {
        value = mMinimum;
    }
    
    mProgressValue=value;

    //redraw track
    HbStyleOptionProgressSlider sliderOption;
    q->initStyleOption(&sliderOption);
    if(mTrack) {
        q->style()->updatePrimitive(mTrack, HbStyle::P_ProgressSlider_track, &sliderOption);
    }

    emit q->valueChanged(value);
}

void HbProgressSliderPrivate::setEnableFlag(bool flag)
{
    Q_Q(HbProgressSlider);
	
	HbStyleOptionProgressSlider option;
    q->initStyleOption(&option);
    
	if(!flag) {
        q->setProgressValue(q->minimum());
        q->setSliderValue(q->minimum());
    }
    if (mFrame) {
            q->style()->updatePrimitive(mFrame, HbStyle::P_ProgressSlider_frame, &option);          
    }
}

void HbProgressSliderPrivate::init()
{
    Q_Q(HbProgressSlider);

    mSliderGraphicItem  = q->style()->createPrimitive(HbStyle::P_ProgressSlider_slidertrack,mFrame);
    // Show the touch area which is created in ProgressBar//
    mTouchAreaItem = q->style()->createPrimitive(HbStyle::P_ProgressSlider_toucharea,q);
    mFrame->setZValue(mTouchAreaItem->zValue()+1);

#ifdef HB_EFFECTS
    HbEffectInternal::add(HB_PRGRESSSLIDER_ITEM_TYPE,"progressslider_trackpress", "progressslider_trackpress");
    HbEffectInternal::add(HB_PRGRESSSLIDER_ITEM_TYPE,"progressslider_trackrelease", "progressslider_trackrelease");
#endif

    q->grabGesture(Qt::TapGesture);

    if(QGraphicsObject *touchArea = mTouchAreaItem->toGraphicsObject()) {
        touchArea->grabGesture(Qt::TapGesture);
    }
}

void HbProgressSliderPrivate::emitSliderPressed()
{
    Q_Q(HbProgressSlider);
    emit q->sliderPressed();
}

void HbProgressSliderPrivate::emitSliderReleased()
{
    Q_Q(HbProgressSlider);
    emit q->sliderReleased();
}

void HbProgressSliderPrivate::emitSliderMoved(int newValue)
{
    Q_Q(HbProgressSlider);
    if (handle->isHandlePressed()) {
        HbWidgetFeedback::continuousTriggered(q, Hb::ContinuousDragged);
    }
    emit q->sliderMoved(newValue);
}

QRectF HbProgressSliderPrivate::boundingRect()const
{
    return mFrame->boundingRect();
}

HbStyle* HbProgressSliderPrivate::style() const
{
     Q_Q(const HbProgressSlider);
     return q->style();
}

QGraphicsItem* HbProgressSliderPrivate::parentGraphicsItem() const
{
    return mFrame;
}

HbWidget* HbProgressSliderPrivate::parentGraphicsWidget() const
{
    Q_Q(const HbProgressSlider);
    return const_cast<HbProgressSlider*> (q);
}

int HbProgressSliderPrivate::progressValue()const
{
    Q_Q(const HbProgressSlider);
    return q->sliderValue();
}

int HbProgressSliderPrivate::maximum() const 
{
    Q_Q(const HbProgressSlider);
    return q->maximum();
}
 
int HbProgressSliderPrivate::minimum() const 
{
    Q_Q(const HbProgressSlider);
    return q->minimum();
}
 
bool HbProgressSliderPrivate::invertedAppearance() const 
{
    Q_Q(const HbProgressSlider);
    return q->invertedAppearance();
}

QString HbProgressSliderPrivate::toolTipText() const
{
    return mTooltipText;
}

Qt::Alignment HbProgressSliderPrivate::textAlignment() const
{
    return Qt::AlignTop;
}
Qt::Orientation HbProgressSliderPrivate::orientation()
{
    return mOrientation;
}

void HbProgressSliderPrivate::setRange(int minimum, int maximum)
{
    Q_Q( HbProgressSlider );
    HbProgressBarPrivate::setRange(minimum, maximum);
    q->setSliderValue(mSliderValue);
}

/*!
    @beta
    @hbwidgets
    \class HbProgressSlider
    \brief Constructs a basic progress slider.
    ProgressSlider is a basic slider but the track is like a progressbar indicating how much progress
    has been done. its a slider with progressbar as its track with some additional behaviour. 
    There is also a progressValue which indicates the amount of buffered data.General use
    for this widget would be for playing music online which indicates sliderValue as currentTime and 
    progressValue as the buffered amount.

    HbProgressSlider is derived from HbProgressBar so it supports all the features supported by HbProgressBar.

    HbProgressSlider emits below signals 

    void sliderPressed();
    void sliderReleased();
    void sliderMoved(int value);

    sliderPressed is emits when the track is pressed. 
    sliderReleased is emits when the track is released.
    sliderMoved is emits when the handle is moved in any direction.


    sample code showing how this can be connected. If the Application has different use case based on 
    Slider press and slider release they can customize the behaviour.

    \code
    HbProgressSlider *object = new HbProgressSlider(parent);
    connect(mySlider,SIGNAL(sliderMoved(int)), mySlider ,SLOT(setSliderValue(int)));
    \endcode
    
*/

/*!
    @beta
    Constructs a progressslider with a  parent.
*/

HbProgressSlider::HbProgressSlider(QGraphicsItem *parent) :
    HbProgressBar(*new HbProgressSliderPrivate,parent)
{
    Q_D( HbProgressSlider );
    d->q_ptr = this;
    d->init();
    setMinMaxTextVisible(true);

    setFocusPolicy(Qt::FocusPolicy(qApp->style()->styleHint(QStyle::SH_Button_FocusPolicy)));
    d->handle =new HbProgressSliderHandle(d);
    if(!flags().testFlag(ItemIsFocusable)) {
        d->handle->setVisible(false);
    }
    if(d->mOrientation == Qt::Horizontal){
        qreal x = boundingRect().height();
        qreal y = d->handle->size().height();
        qreal a = qreal (x-y)/2;
        d->handle->setPos(0,a);

    }
    else{
        d->handle->setPos(0,boundingRect().height());
    }
}


/*!
    @beta
    Constructs a progressslider with a  parent.
*/
HbProgressSlider::HbProgressSlider(HbProgressSliderPrivate &dd,QGraphicsItem *parent) : 
    HbProgressBar( dd,parent)
{
    Q_D( HbProgressSlider );
    d->init();

    setFocusPolicy(Qt::FocusPolicy(qApp->style()->styleHint(QStyle::SH_Button_FocusPolicy)));
    d->handle =new HbProgressSliderHandle(d);
    d->handle->setZValue(1010);
    if(d->mOrientation == Qt::Horizontal){
        qreal posY = qreal (boundingRect().height()-d->handle->size().height())/2;
        d->handle->setPos(0,posY);
    }
    else{
        d->handle->setPos(0,boundingRect().height());
    }
}


/*!
    @beta
    Destructor for the progressslider.
*/
HbProgressSlider::~HbProgressSlider()
{
}

/*!
    @beta
    Sets the current value of the progress slider.

    The progress slider forces the value to be within the legal range: \b
    minimum <= \c value <= \b maximum.

    \param value slider value.

    \sa sliderValue()
*/
void HbProgressSlider::setSliderValue(int value)
{
    Q_D( HbProgressSlider );

    if(d->handle->isHandlePressed() && !d->handle->isHandleMoving()){
        return ;
    }
    if (value>maximum()) {
        value = maximum();
    }

    if (value<minimum()) {
        value = minimum();
    }
    d->mSliderValue = value;

    HbStyleOptionProgressSlider option;
    initStyleOption(&option);

    if (d->mSliderGraphicItem) {
        style()->updatePrimitive(d->mSliderGraphicItem, HbStyle::P_ProgressSlider_slidertrack, &option);
    }
    d->handle->setHandlePosForValue(sliderValue());
}

/*!
    @beta
    Returns the current slider value . 

    The default value is \c 0.

    \sa setSliderValue()
*/
int HbProgressSlider::sliderValue() const
{
    Q_D(const HbProgressSlider );
    return d->mSliderValue;
}


/*!
    @beta
    Returns true of false depending on whether the slider is pressed down or not.
*/

bool HbProgressSlider::isSliderDown() const
{
    Q_D( const HbProgressSlider );
    return d->handle->isHandlePressed();
}


/*!
    @beta
    Sets the inverted appearence of the slider.
    If inverted the slider increases from right to left.

    \param inverted true or false

    \sa invertedAppearance()
*/
void HbProgressSlider::setInvertedAppearance(bool inverted)
{
    Q_D( HbProgressSlider );
    if(d->mInvertedAppearance != inverted) {
        d->mInvertedAppearance=inverted;
        d->handle->setHandlePosForValue(sliderValue());
        updatePrimitives();
    }
}


void HbProgressSlider::mousePressEvent(QGraphicsSceneMouseEvent *event) 
{
    Q_D(HbProgressSlider);
    if(flags().testFlag(ItemIsFocusable)) {
        d->mDownState = true;
        HbStyleOptionProgressSlider option;
        initStyleOption(&option);
        if (d->mFrame) {
            style()->updatePrimitive(d->mFrame, HbStyle::P_ProgressSlider_frame, &option);          
        }
        qreal temp = event->scenePos().x();
        if((d->mMinMaxTextVisible) && (d->mMinMaxTextAlignment== Qt::AlignCenter)) {
            temp -=  d->mMinTextItem->boundingRect().width();
        }
        if( (temp > d->handle->pos().x()) && (temp < (d->handle->boundingRect().width()+d->handle->pos().x())) ) {
            event->ignore();
            return;
        }
        
        HbWidgetFeedback::triggered(this, Hb::InstantPressed);
        d->handle->handleTrackPress(event);
        event->accept();
        #ifdef HB_EFFECTS
            HbEffect::start(this, HB_PRGRESSSLIDER_ITEM_TYPE, "progressslider_trackpress");
        #endif
    } else {
        event->ignore();
    }
}

void HbProgressSlider::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) 
{
    Q_D(HbProgressSlider);
    if(flags().testFlag(ItemIsFocusable)) {
        d->mDownState = false;

        HbStyleOptionProgressSlider option;
        initStyleOption(&option);
        if (d->mFrame) {
            style()->updatePrimitive(d->mFrame, HbStyle::P_ProgressSlider_frame, &option);          
        }

        HbWidgetFeedback::triggered(this, Hb::InstantReleased);
        d->handle->handleTrackRelease(event);
        event->accept();
#ifdef HB_EFFECTS
        HbEffect::start(this, HB_PRGRESSSLIDER_ITEM_TYPE, "progressslider_trackrelease");
#endif
    } else {
        event->ignore();
    }
}

void HbProgressSlider::setGeometry(const QRectF & rect)
{
    Q_D(HbProgressSlider);
    HbProgressBar::setGeometry(rect);
    d->handle->setHandlePosForValue(sliderValue());
    updatePrimitives();
}

/*!
    Initializes \a option with the values from this HbProgressSlider. 
    This method is useful for subclasses when they need a HbStyleOptionProgressSlider,
    but don't want to fill in all the information themselves.
 */
void HbProgressSlider::initStyleOption( HbStyleOptionProgressSlider *option ) const
{
    Q_D(const HbProgressSlider);
    HbProgressBar::initStyleOption(option);

    option->secondaryType = true;
    option->progressSliderValue = d->mSliderValue;  
    option->pressedState = d->mDownState;
    if(isEnabled()) {
        option->disableState = false;
    }
    else {
        option->disableState = true;
    }
}

void HbProgressSlider::updatePrimitives()
{
    Q_D(HbProgressSlider);
    if(isVisible()){
        d->mWaitTrack->setVisible(false);
        d->mTrack->setVisible(true);

        HbStyleOptionProgressSlider option;
        initStyleOption(&option);

        if (d->mSliderGraphicItem) {
            style()->updatePrimitive(d->mSliderGraphicItem, HbStyle::P_ProgressSlider_slidertrack, &option);
        }

        if(d->handle)
              d->handle->setHandlePosForValue(sliderValue());
    
        if (d->mFrame) {
            style()->updatePrimitive(d->mFrame, HbStyle::P_ProgressSlider_frame, &option);          
        }
     
        if (d->mTrack) {
                style()->updatePrimitive(d->mTrack, HbStyle::P_ProgressSlider_track, &option);
        }
                
        if(d->mMinTextItem && d->mMinMaxTextVisible) {
            style()->updatePrimitive(d->mMinTextItem,HbStyle::P_ProgressBar_mintext,&option);    
        }

        if(d->mMaxTextItem && d->mMinMaxTextVisible) {
            style()->updatePrimitive(d->mMaxTextItem,HbStyle::P_ProgressBar_maxtext,&option);    
        }
    }
}

void HbProgressSlider::showEvent( QShowEvent * event )
{
    Q_D(const HbProgressSlider);
    if(d->mTouchAreaItem && scene()) {
        d->mTouchAreaItem->removeSceneEventFilter(this);
        d->mTouchAreaItem->installSceneEventFilter(this);
    }

    HbProgressBar::showEvent(event);
}
QVariant HbProgressSlider::itemChange(GraphicsItemChange change,const QVariant & value)
{ 
    Q_D(HbProgressSlider);
    if (change == ItemFlagsChange) {
        if(value.toInt() & ItemIsFocusable) {
            if(!flags().testFlag(ItemIsFocusable) && d->handle) {
                d->handle->setVisible(true);
            }
        } else {
            if(flags().testFlag(ItemIsFocusable) && d->handle) {
                d->handle->setVisible(false);
            }
        }

    }
    return HbProgressBar::itemChange(change, value);
}

bool HbProgressSlider::sceneEventFilter(QGraphicsItem *obj,QEvent *event)
{
    Q_D(HbProgressSlider);
    if( obj == d->mTouchAreaItem) {
       if (!isEnabled() ) {
            return false;
        }
        if (event->type() == QEvent::GraphicsSceneMousePress){
            mousePressEvent((QGraphicsSceneMouseEvent *) event);
             return true;
        }
        else if (event->type() == QEvent::GraphicsSceneMouseRelease){
            mouseReleaseEvent((QGraphicsSceneMouseEvent *) event);
            return true;
        }
    } 
    return false;
}


/*!
    @beta
    Sets the tooltip for the handle. By default it shows the slider value.
    If the Application wants to configure this they use setSliderToolTip for 
    setting the new tooltip text.

    \param text tooltip text

    \sa sliderToolTip()
*/
void HbProgressSlider::setSliderToolTip(const QString &text)
{
    Q_D(HbProgressSlider);
    d->mTooltipText = text;
}


/*!
    @beta

    Returns the current tooltip text value . 
    \sa setSliderToolTip()
*/
QString HbProgressSlider::sliderToolTip() const
{
    Q_D(const HbProgressSlider);
    return d->mTooltipText;
}



/*!
    @beta
    Sets the icon for handle. By default it has theme based icon. Application 
    can configure this icon via this API

    \param handlePath path of the graphics

    \sa handleIcon()
*/
void HbProgressSlider::setHandleIcon(const QString& handlePath )
{
    
    Q_D( HbProgressSlider );
    if(handlePath != d->mHandlePath) {
        d->mHandlePath =handlePath;
        d->handle->setHandleIcon(HbIcon(handlePath));
    }
}

/*!
    @beta

    Returns the icon  handle path

    \sa setHandleIcon()
*/
QString HbProgressSlider::handleIcon() const
{
    Q_D(const HbProgressSlider);
    return d->mHandlePath;
}

/*!

    \deprecated HbProgressSlider::primitive(HbStyle::Primitive)
        is deprecated.

    Returns the pointer for \a primitive passed.
    Will return NULL if \a primitive passed is invalid
*/
QGraphicsItem* HbProgressSlider::primitive(HbStyle::Primitive primitive) const
{
    Q_D(const HbProgressSlider);

    switch (primitive) {
        case HbStyle::P_ProgressSlider_frame:
            return d->mFrame;
        case HbStyle::P_ProgressSlider_track:
            return d->mTrack;
        case HbStyle::P_ProgressSlider_slidertrack:
            return d->mSliderGraphicItem;
        case HbStyle::P_ProgressSlider_toucharea:
            return d->mTouchAreaItem; 
        case HbStyle::P_ProgressSliderHandle_icon:
        case HbStyle::P_ProgressSliderHandle_toucharea:
            return d->handle->primitive(primitive);
        default:
            return 0;
    }
}