qwt_interval_symbol.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_INTERVAL_SYMBOL_H
#define QWT_INTERVAL_SYMBOL_H
 
#include "qwt_global.h"
#include <qnamespace.h>
 
class QPainter;
class QPen;
class QBrush;
class QPointF;
class QColor;
 
class QWT_EXPORT QwtIntervalSymbol
{
public:
    enum Style
    {
        NoSymbol = -1,
 
        Bar,
 
        Box,
 
        UserSymbol = 1000
    };
 
public:
    // Constructor
    explicit QwtIntervalSymbol(Style = NoSymbol);
    // Copy constructor
    QwtIntervalSymbol(const QwtIntervalSymbol&);
 
    // Destructor
    virtual ~QwtIntervalSymbol();
 
    // Assignment operator
    QwtIntervalSymbol& operator=(const QwtIntervalSymbol&);
    // Compare two symbols
    bool operator==(const QwtIntervalSymbol&) const;
    // Compare two symbols
    bool operator!=(const QwtIntervalSymbol&) const;
 
    // Set the symbol width
    void setWidth(int);
    // Get the symbol width
    int width() const;
 
    // Set the brush for Box style
    void setBrush(const QBrush&);
    // Get the brush
    const QBrush& brush() const;
 
    // Build and set a pen with color, width and style
    void setPen(const QColor&, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine);
    // Set the pen
    void setPen(const QPen&);
    // Get the pen
    const QPen& pen() const;
 
    // Set the symbol style
    void setStyle(Style);
    // Get the symbol style
    Style style() const;
 
    // Draw the symbol
    virtual void draw(QPainter*, Qt::Orientation, const QPointF& from, const QPointF& to) const;
 
private:
    QWT_DECLARE_PRIVATE(QwtIntervalSymbol)
};
 
#endif