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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/qslider.h   3.2.0   edited May 13 09:08 $
    **
    ** 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

    struct QSliderPrivate;

    class QTimer;

    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 );
        ~QSlider();

        virtual void	setOrientation( Orientation );
        Orientation orientation() const;
        virtual void	setTracking( bool enable );
        bool	tracking() const;
        virtual void 	setPalette( const QPalette & );

        int sliderStart() const;
        QRect sliderRect() const;
        QSize sizeHint() const;
        void setSizePolicy( QSizePolicy sp );
        void setSizePolicy( QSizePolicy::SizeType hor, QSizePolicy::SizeType ver, bool hfw = FALSE );

        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();
        void	addLine();
        void	subtractLine();

    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 * );
    #ifndef QT_NO_WHEELEVENT
        void	wheelEvent( QWheelEvent * );
    #endif
        void	focusInEvent( QFocusEvent *e );
        void	focusOutEvent( QFocusEvent *e );

        void	styleChange( QStyle& );

        void	valueChange();
        void	rangeChange();

    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		available() const;
        int		goodPart( const QPoint& ) const;
        void	initTicks();

        QSliderPrivate *d;
        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;
    }

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

    inline void QSlider::setSizePolicy( QSizePolicy::SizeType hor, QSizePolicy::SizeType ver, bool hfw )
    {
        QWidget::setSizePolicy( hor, ver, hfw );
    }

    #endif // QT_NO_SLIDER

    #endif // QSLIDER_H