qwt_plot_shapeitem.h

/******************************************************************************
 * 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
 *
 * Modified by ChenZongYan in 2024 <czy.t@163.com>
 *   Summary of major modifications (see ChangeLog.md for full history):
 *   1. CMake build system & C++11 throughout.
 *   2. Core panner/ zoomer refactored:
 *        - QwtPanner → QwtCachePanner (pixmap-cache version)
 *        - New real-time QwtPlotPanner derived from QwtPicker.
 *   3. Zoomer supports multi-axis.
 *   4. Parasite-plot framework:
 *        - QwtFigure, QwtPlotParasiteLayout, QwtPlotTransparentCanvas,
 *        - QwtPlotScaleEventDispatcher, built-in pan/zoom on axis.
 *   5. New picker: QwtPlotSeriesDataPicker (works with date axis).
 *   6. Raster & color-map extensions:
 *        - QwtGridRasterData (2-D table + interpolation)
 *        - QwtLinearColorMap::stopColors(), stopPos() API rename.
 *   7. Bar-chart: expose pen/brush control.
 *   8. Amalgamated build: single QwtPlot.h / QwtPlot.cpp pair in src-amalgamate.
 *****************************************************************************/
 
#ifndef QWT_PLOT_SHAPE_ITEM_H
#define QWT_PLOT_SHAPE_ITEM_H
 
#include "qwt_global.h"
#include "qwt_plot_item.h"
 
#include <qstring.h>
 
class QPainterPath;
class QPolygonF;
 
class QWT_EXPORT QwtPlotShapeItem : public QwtPlotItem
{
  public:
    enum PaintAttribute
    {
        ClipPolygons = 0x01,
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    
    enum LegendMode
    {
        LegendShape,
 
        LegendColor
    };
 
    explicit QwtPlotShapeItem( const QString& title = QString() );
    explicit QwtPlotShapeItem( const QwtText& title );
 
    virtual ~QwtPlotShapeItem();
 
    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;
 
    void setLegendMode( LegendMode );
    LegendMode legendMode() const;
 
    void setRect( const QRectF& );
    void setPolygon( const QPolygonF& );
 
    void setShape( const QPainterPath& );
    QPainterPath shape() const;
 
    void setPen( const QColor&, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
    void setPen( const QPen& );
    QPen pen() const;
 
    void setBrush( const QBrush& );
    QBrush brush() const;
 
    void setRenderTolerance( double );
    double renderTolerance() const;
 
    virtual QRectF boundingRect() const QWT_OVERRIDE;
 
    virtual void draw( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect ) const QWT_OVERRIDE;
 
    virtual QwtGraphic legendIcon(
        int index, const QSizeF& ) const QWT_OVERRIDE;
 
    virtual int rtti() const QWT_OVERRIDE;
 
  private:
    void init();
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif