qscrollbar.h

/****************************************************************************
** $Id: qscrollbar.h,v 2.7.2.2 1998/08/21 19:13:26 hanord Exp $
**
** Definition of QScrollBar class
**
** Created : 940427
**
** Copyright (C) 1992-1998 Troll Tech AS.  All rights reserved.
**
** This file is part of Qt Free Edition, version 1.42.
**
** See the file LICENSE included in the distribution for the usage
** and distribution terms, or http://www.troll.no/free-license.html.
**
** IMPORTANT NOTE: You may NOT copy this file or any part of it into
** your own programs or libraries.
**
** Please see http://www.troll.no/pricing.html for information about 
** Qt Professional Edition, which is this same library but with a
** license which allows creation of commercial/proprietary software.
**
*****************************************************************************/

#ifndef QSCROLLBAR_H
#define QSCROLLBAR_H

#ifndef QT_H
#include "qwidget.h"
#include "qrangecontrol.h"
#include "qdrawutil.h"
#endif // QT_H

class Q_EXPORT QScrollBar : public QWidget, public QRangeControl
{
    Q_OBJECT
public:
    enum Orientation { Horizontal, Vertical };

    QScrollBar( QWidget *parent=0, const char *name=0 );
    QScrollBar( Orientation, QWidget *parent=0, const char *name=0 );
    QScrollBar( int minValue, int maxValue, int LineStep, int PageStep,
                int value, Orientation,
                QWidget *parent=0, const char *name=0 );

    void        setOrientation( Orientation );
    Orientation orientation() const;
    void        setTracking( bool enable );
    bool        tracking() const;

    bool        draggingSlider() const;

    void        setPalette( const QPalette & );
    QSize       sizeHint() const;

signals:
    void        valueChanged( int value );
    void        sliderPressed();
    void        sliderMoved( int value );
    void        sliderReleased();
    void        nextLine();
    void        prevLine();
    void        nextPage();
    void        prevPage();

protected:
    void        timerEvent( QTimerEvent * );
    void        keyPressEvent( QKeyEvent * );
    void        resizeEvent( QResizeEvent * );
    void        paintEvent( QPaintEvent * );

    void        mousePressEvent( QMouseEvent * );
    void        mouseReleaseEvent( QMouseEvent * );
    void        mouseMoveEvent( QMouseEvent * );

    void        valueChange();
    void        stepChange();
    void        rangeChange();

    int         sliderStart() const;
    QRect       sliderRect() const;

private:
    void        init();
    void        positionSliderFromValue();
    int         calculateValueFromSlider() const;

    uint        pressedControl   : 8;
    uint        track            : 1;
    uint        clickedAt        : 1;
    uint        orient           : 1;
    uint        thresholdReached : 1;
    uint        isTiming         : 1;

    int         slidePrevVal;
    QCOORD      sliderPos;
    QCOORD      clickOffset;

private:        // Disabled copy constructor and operator=
#if defined(Q_DISABLE_COPY)
    QScrollBar( const QScrollBar & );
    QScrollBar &operator=( const QScrollBar & );
#endif
};


inline void QScrollBar::setTracking( bool t )
{
    track = t;
}

inline bool QScrollBar::tracking() const
{
    return track;
}

inline QScrollBar::Orientation QScrollBar::orientation() const
{
    return (Orientation)orient;
}

inline int QScrollBar::sliderStart() const
{
    return sliderPos;
}


void qDrawArrow( QPainter *, ArrowType type, GUIStyle style, bool down,
                 int x, int y, int w, int h, const QColorGroup & );


#endif // QSCROLLBAR_H