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
    };
 
    // Constructor
    explicit QwtPlotShapeItem(const QString& title = QString());
    // Constructor with title
    explicit QwtPlotShapeItem(const QwtText& title);
 
    // Destructor
    ~QwtPlotShapeItem() override;
 
    // Set a paint attribute
    void setPaintAttribute(PaintAttribute, bool on = true);
    // Test a paint attribute
    bool testPaintAttribute(PaintAttribute) const;
 
    // Set the legend mode
    void setLegendMode(LegendMode);
    // Get the legend mode
    LegendMode legendMode() const;
 
    // Set the shape as a rectangle
    void setRect(const QRectF&);
    // Set the shape as a polygon
    void setPolygon(const QPolygonF&);
 
    // Set the shape
    void setShape(const QPainterPath&);
    // Get the shape
    QPainterPath shape() const;
 
    // Set the pen
    void setPen(const QColor&, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine);
    // Set the pen
    void setPen(const QPen&);
    // Get the pen
    QPen pen() const;
 
    // Set the brush
    void setBrush(const QBrush&);
    // Get the brush
    QBrush brush() const;
 
    // Set the render tolerance
    void setRenderTolerance(double);
    // Get the render tolerance
    double renderTolerance() const;
 
    // Get the bounding rectangle
    virtual QRectF boundingRect() const override;
 
    // Draw the shape item
    virtual void draw(QPainter*, const QwtScaleMap& xMap, const QwtScaleMap& yMap, const QRectF& canvasRect) const override;
 
    // Get the legend icon
    virtual QwtGraphic legendIcon(int index, const QSizeF&) const override;
 
    // Get the runtime type information
    virtual int rtti() const override;
 
private:
    void init();
 
    QWT_DECLARE_PRIVATE(QwtPlotShapeItem)
};
 
#endif