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# qslider.h

This is the verbatim text of the qslider.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/src/widgets/qslider.h   2.3.1   edited 2001-01-26 $
    **
    ** Definition of QSlider class
    **
    ** Created : 961019
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the widgets module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QSLIDER_H
    #define QSLIDER_H

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

    #ifndef QT_NO_SLIDER

    class QTimer;
    struct QSliderData;

    class Q_EXPORT QSlider : public QWidget, public QRangeControl
    {
        Q_OBJECT
        Q_ENUMS( TickSetting )
        Q_PROPERTY( int minValue READ minValue WRITE setMinValue )
        Q_PROPERTY( int maxValue READ maxValue WRITE setMaxValue )
        Q_PROPERTY( int lineStep READ lineStep WRITE setLineStep )
        Q_PROPERTY( int pageStep READ pageStep WRITE setPageStep )
        Q_PROPERTY( int value READ value WRITE setValue )
        Q_PROPERTY( bool tracking READ tracking WRITE setTracking )
        Q_PROPERTY( Orientation orientation READ orientation WRITE setOrientation )
        Q_PROPERTY( TickSetting tickmarks READ tickmarks WRITE setTickmarks )
        Q_PROPERTY( int tickInterval READ tickInterval WRITE setTickInterval )

    public:
        enum TickSetting { NoMarks = 0, Above = 1, Left = Above,
                           Below = 2, Right = Below, Both = 3 };
        QSlider( QWidget *parent, const char *name=0 );
        QSlider( Orientation, QWidget *parent, const char *name=0 );
        QSlider( int minValue, int maxValue, int pageStep, int value, Orientation,
                 QWidget *parent, const char *name=0 );

        virtual void        setOrientation( Orientation );
        Orientation orientation() const;
        virtual void        setTracking( bool enable );
        bool        tracking() const;
        virtual void        setPalette( const QPalette & );
        QRect       sliderRect() const;
        QSize       sizeHint() const;
        QSizePolicy sizePolicy() const;
        QSize       minimumSizeHint() const;

        virtual void setTickmarks( TickSetting );
        TickSetting tickmarks() const { return ticks; }

        virtual void setTickInterval( int );
        int         tickInterval() const { return tickInt; }

        int  minValue() const;
        int  maxValue() const;
        void setMinValue( int );
        void setMaxValue( int );
        int  lineStep() const;
        int  pageStep() const;
        void setLineStep( int );
        void setPageStep( int );
        int  value() const;

    public slots:
        virtual void        setValue( int );
        void        addStep();
        void        subtractStep();

    signals:
        void        valueChanged( int value );
        void        sliderPressed();
        void        sliderMoved( int value );
        void        sliderReleased();

    protected:
        void        resizeEvent( QResizeEvent * );
        void        paintEvent( QPaintEvent * );

        void        keyPressEvent( QKeyEvent * );
        void        mousePressEvent( QMouseEvent * );
        void        mouseReleaseEvent( QMouseEvent * );
        void        mouseMoveEvent( QMouseEvent * );
        void        wheelEvent( QWheelEvent * );
        void        focusInEvent( QFocusEvent *e );
        void        focusOutEvent( QFocusEvent *e );

        void updateMask();
        void styleChange( QStyle& );

        void        valueChange();
        void        rangeChange();

        virtual void paintSlider( QPainter *, const QColorGroup&, const QRect & );
        void        drawTicks( QPainter *, const QColorGroup&, int, int, int=1 ) const;

        void        drawWinGroove( QPainter *,  QCOORD );
        void        drawTicks( QPainter *,  int, int, int=1 ) const;

        virtual int thickness() const;

    private slots:
        void        repeatTimeout();

    private:
        enum State { Idle, Dragging, TimingUp, TimingDown };

        void        init();
        int         positionFromValue( int ) const;
        int         valueFromPosition( int ) const;
        void        moveSlider( int );
        void        reallyMoveSlider( int );
        void        resetState();
        int         slideLength() const;
        int         available() const;
        int         goodPart( const QPoint& ) const;
        void        initTicks();

        QSliderData *extra;
        QTimer      *timer;
        QCOORD      sliderPos;
        int         sliderVal;
        QCOORD      clickOffset;
        State       state;
        bool        track;
        QCOORD      tickOffset;
        TickSetting ticks;
        int         tickInt;
        Orientation orient;

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

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

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

    #endif // QT_NO_SLIDER

    #endif // QSLIDER_H