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

**

** 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.

**

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

#ifndef HBPROGRESSSLIDERHANDLE_P_H

#define HBPROGRESSSLIDERHANDLE_P_H

#include "hbnamespace_p.h"

#include <hbwidget.h>

#include <hbprogressslider.h>

class HbStyleOptionProgressSliderHandle;

class HbHandleParent

{

public:

    virtual HbStyle* style() const = 0;

    virtual void emitSliderPressed() = 0;

    virtual void emitSliderMoved(int vlaue) = 0;

    virtual void emitSliderReleased() = 0;

    virtual QRectF boundingRect() const = 0;

    virtual QGraphicsItem* parentGraphicsItem() const = 0;

    virtual HbWidget* parentGraphicsWidget() const = 0;

    virtual ~HbHandleParent(){};

    virtual int progressValue()const = 0;

    virtual int maximum() const = 0;

    virtual int minimum() const = 0;

    virtual bool invertedAppearance() const = 0;

    virtual QString toolTipText() const= 0;

    virtual Qt::Alignment textAlignment() const = 0;

    virtual bool textVisible()const = 0;    

    virtual Qt::Orientation orientation() = 0;

};

class HbProgressSliderHandle : public HbWidget

{

     Q_OBJECT

public:

    enum StateFlag{

        TextVisible   = 0x01,

        MousePressed  = 0x02,

        HandleMoving  = 0x04,

        UserItem      = 0x08,

        MouseMove     = 0x10

    };

    Q_DECLARE_FLAGS(StateFlags, StateFlag)

    explicit HbProgressSliderHandle(HbHandleParent *parent);

    virtual ~HbProgressSliderHandle();

    int pointToValue(QPointF point) const ;

    QPointF valueToHandlePos(int value) const;

    enum { Type = HbPrivate::ItemType_ProgressSliderHandle };

    int type() const { return Type; }

    void setHandleIcon(const HbIcon &icon);

    void handleTrackRelease(QGraphicsSceneMouseEvent * event);

    void handleTrackPress(QGraphicsSceneMouseEvent * event);

    QVariant processItemChange(const QVariant &value);

    void setHandlePosForValue(int progressValue);

    QPointF normalizedPos(const QPointF&  pos,bool inverted) const;

    bool isHandlePressed() const;

    bool isHandleMoving() const;

    QGraphicsItem* primitive(HbStyle::Primitive primitive) const;

public slots:

    void updatePrimitives();

protected:

    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);

    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

    virtual void mouseMoveEvent ( QGraphicsSceneMouseEvent * event );

    virtual void gestureEvent(QGestureEvent *event);

    void initStyleOption( HbStyleOptionProgressSliderHandle *option ) const;

private:

    StateFlags mFlags;

    HbHandleParent *q;

    QPointF mMousePressPos;

    QPointF mItemPosAtPress;

    QPointF mItemCurPos;

    QGraphicsItem *mHandleIconItem; 

    QGraphicsItem *mTouchItem;

    HbIcon mHandleIcon;

};

#endif  //HBPROGRESSSLIDERHANDLE_P_H