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# qdial.h

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

    /****************************************************************************
    ** $Id:  qt/qdial.h   3.0.0   edited Sep 21 17:17 $
    **
    ** Definition of the dial widget
    **
    ** Created : 1999.01.04
    **
    ** Copyright (C) 1999-2000 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 QDIAL_H
    #define QDIAL_H

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

    #ifndef QT_NO_DIAL

    class QDialPrivate;

    class Q_EXPORT QDial: public QWidget, public QRangeControl
    {
        Q_OBJECT
        Q_PROPERTY( bool tracking READ tracking WRITE setTracking )
        Q_PROPERTY( bool wrapping READ wrapping WRITE setWrapping )
        Q_PROPERTY( int notchSize READ notchSize )
        Q_PROPERTY( double notchTarget READ notchTarget WRITE setNotchTarget )
        Q_PROPERTY( bool notchesVisible READ notchesVisible WRITE setNotchesVisible )
        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 )

    public:
        QDial( QWidget* parent=0, const char* name=0, WFlags f = 0 );
        QDial( int minValue, int maxValue, int pageStep, int value,
    	   QWidget* parent=0, const char* name=0 );
        ~QDial();

        bool tracking() const;

        bool wrapping() const;

        int notchSize() const;

        virtual void setNotchTarget( double );
        double notchTarget() const;

        bool notchesVisible() const;

        QSize sizeHint() const;
        QSize minimumSizeHint() const;

        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 addLine();
        void subtractLine();
        void addPage();
        void subtractPage();
        virtual void setNotchesVisible( bool b );
        virtual void setWrapping( bool on );
        virtual void setTracking( bool enable );

    signals:
        void valueChanged( int value );
        void dialPressed();
        void dialMoved( int value );
        void dialReleased();

    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 * );
        void focusOutEvent( QFocusEvent * );

        void valueChange();
        void rangeChange();

        virtual void repaintScreen( const QRect *cr = 0 );

    private:
        QDialPrivate * d;

        int valueFromPoint( const QPoint & ) const;
        double angle( const QPoint &, const QPoint & ) const;
        QPointArray calcArrow( double &a ) const;
        QRect calcDial() const;
        int calcBigLineSize() const;
        void calcLines();

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

    };

    #endif  // QT_NO_DIAL

    #endif