qslider.h

/****************************************************************************
** $Id: qslider.h,v 2.24.2.3 1998/08/21 19:13:26 hanord Exp $
**
** Definition of QSlider class
**
** Created : 961019
**
** 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 QSLIDER_H
#define QSLIDER_H

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


class QTimer;
struct QSliderData;


class Q_EXPORT QSlider : public QWidget, public QRangeControl
{
    Q_OBJECT
public:
    enum Orientation { Horizontal, Vertical };
    enum TickSetting { NoMarks = 0, Above = 1, Left = Above,
                       Below = 2, Right = Below, Both = 3 };

    QSlider( QWidget *parent=0, const char *name=0 );
    QSlider( Orientation, QWidget *parent=0, const char *name=0 );
    QSlider( int minValue, int maxValue, 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;

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

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

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

public slots:
    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        focusInEvent( QFocusEvent *e );

    void        valueChange();
    void        rangeChange();

    virtual void paintSlider( QPainter *, const QRect & );
    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 // QSLIDER_H