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qslider.h

/****************************************************************************
** $Id: qt/src/widgets/qslider.h   2.2.1   edited 2000-08-25 $
**
** 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_COMPLEXWIDGETS


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_COMPLEXWIDGETS

#endif // QSLIDER_H