qwt_symbol.h

/* -*- 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_SYMBOL_H
#define QWT_SYMBOL_H
 
#include "qwt_global.h"
#include <qpolygon.h>
 
class QPainter;
class QRect;
class QSize;
class QBrush;
class QPen;
class QColor;
class QPointF;
class QPolygonF;
class QPainterPath;
class QPixmap;
class QByteArray;
class QwtGraphic;
 
class QWT_EXPORT QwtSymbol
{
public:
    enum Style
    {
        NoSymbol = -1,
 
        Ellipse,
 
        Rect,
 
        Diamond,
 
        Triangle,
 
        DTriangle,
 
        UTriangle,
 
        LTriangle,
 
        RTriangle,
 
        Cross,
 
        XCross,
 
        HLine,
 
        VLine,
 
        Star1,
 
        Star2,
 
        Hexagon,
 
        Path,
 
        Pixmap,
 
        Graphic,
 
        SvgDocument,
 
        UserStyle = 1000
    };
 
    enum CachePolicy
    {
        NoCache,
 
        Cache,
 
        AutoCache
    };
 
public:
    QwtSymbol( Style = NoSymbol );
    QwtSymbol( Style, const QBrush &, const QPen &, const QSize & );
    QwtSymbol( const QPainterPath &, const QBrush &, const QPen & );
 
    virtual ~QwtSymbol();
 
    void setCachePolicy( CachePolicy );
    CachePolicy cachePolicy() const;
 
    void setSize( const QSize & );
    void setSize( int width, int height = -1 );
    const QSize &size() const;
 
    void setPinPoint( const QPointF &pos, bool enable = true );
    QPointF pinPoint() const;
 
    void setPinPointEnabled( bool );
    bool isPinPointEnabled() const;
 
    virtual void setColor( const QColor & );
 
    void setBrush( const QBrush & );
    const QBrush &brush() const;
 
    void setPen( const QColor &, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
    void setPen( const QPen & );
    const QPen &pen() const;
 
    void setStyle( Style );
    Style style() const;
 
    void setPath( const QPainterPath & );
    const QPainterPath &path() const;
 
    void setPixmap( const QPixmap & );
    const QPixmap &pixmap() const;
 
    void setGraphic( const QwtGraphic & );
    const QwtGraphic &graphic() const;
 
#ifndef QWT_NO_SVG
    void setSvgDocument( const QByteArray & );
#endif
 
    void drawSymbol( QPainter *, const QRectF & ) const;
    void drawSymbol( QPainter *, const QPointF & ) const;
    void drawSymbols( QPainter *, const QPolygonF & ) const;
    void drawSymbols( QPainter *,
        const QPointF *, int numPoints ) const;
 
    virtual QRect boundingRect() const;
    void invalidateCache();
 
protected:
    virtual void renderSymbols( QPainter *,
        const QPointF *, int numPoints ) const;
 
private:
    // Disabled copy constructor and operator=
    QwtSymbol( const QwtSymbol & );
    QwtSymbol &operator=( const QwtSymbol & );
 
    class PrivateData;
    PrivateData *d_data;
};
 
inline void QwtSymbol::drawSymbol(
    QPainter *painter, const QPointF &pos ) const
{
    drawSymbols( painter, &pos, 1 );
}
 
inline void QwtSymbol::drawSymbols(
    QPainter *painter, const QPolygonF &points ) const
{
    drawSymbols( painter, points.data(), points.size() );
}
 
#endif