qwt_vectorfield_symbol.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_VECTOR_FIELD_SYMBOL_H
#define QWT_VECTOR_FIELD_SYMBOL_H

#include "qwt_global.h"

class QPainter;
class QPainterPath;

class QWT_EXPORT QwtVectorFieldSymbol
{
public:
    QwtVectorFieldSymbol();
    virtual ~QwtVectorFieldSymbol();

    virtual void setLength( qreal length ) = 0;
    virtual qreal length() const = 0;

    virtual void paint( QPainter * ) const = 0;

private:
    Q_DISABLE_COPY(QwtVectorFieldSymbol)
};

class QWT_EXPORT QwtVectorFieldArrow : public QwtVectorFieldSymbol
{
public:
    QwtVectorFieldArrow( qreal headWidth = 6.0, qreal tailWidth = 1.0 );
    virtual ~QwtVectorFieldArrow() QWT_OVERRIDE;

    virtual void setLength( qreal length ) QWT_OVERRIDE;
    virtual qreal length() const QWT_OVERRIDE;
    virtual void paint( QPainter * ) const QWT_OVERRIDE;

private:
    class PrivateData;
    PrivateData *d_data;
};

class QWT_EXPORT QwtVectorFieldThinArrow : public QwtVectorFieldSymbol
{
public:
    QwtVectorFieldThinArrow( qreal headWidth = 6.0 );
    virtual ~QwtVectorFieldThinArrow() QWT_OVERRIDE;

    virtual void setLength( qreal length ) QWT_OVERRIDE;
    virtual qreal length() const QWT_OVERRIDE;
    virtual void paint( QPainter * ) const QWT_OVERRIDE;

private:
    class PrivateData;
    PrivateData *d_data;
};

#endif