qwt_plot_seriesitem.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_SERIES_ITEM_H
#define QWT_PLOT_SERIES_ITEM_H
 
#include "qwt_global.h"
#include "qwt_plot_item.h"
#include "qwt_series_store.h"
 
#include <qstring.h>
 
class QwtScaleDiv;
 
class QWT_EXPORT QwtPlotSeriesItem : public QwtPlotItem,
    public virtual QwtAbstractSeriesStore
{
  public:
    // Constructor
    explicit QwtPlotSeriesItem( const QString& title = QString() );
    // Constructor with title
    explicit QwtPlotSeriesItem( const QwtText& title );
 
    // Destructor
    virtual ~QwtPlotSeriesItem();
 
    // Set the orientation
    void setOrientation( Qt::Orientation );
    // Get the orientation
    Qt::Orientation orientation() const;
 
    // Draw the series item
    virtual void draw( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect ) const override;
 
    virtual void drawSeries( QPainter* painter,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const = 0;
 
    // Get the bounding rectangle
    virtual QRectF boundingRect() const override;
 
    // Update the scale divisions
    virtual void updateScaleDiv(
        const QwtScaleDiv&, const QwtScaleDiv& ) override;
 
  protected:
    virtual void dataChanged() override;
 
  private:
    class PrivateData;
    PrivateData* m_data;
};
 
#endif