qwt_column_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_COLUMN_SYMBOL_H
#define QWT_COLUMN_SYMBOL_H
 
#include "qwt_global.h"
#include "qwt_interval.h"
 
#include <qnamespace.h>
 
class QPainter;
class QPalette;
class QRectF;
 
class QWT_EXPORT QwtColumnRect
{
public:
    enum Direction
    {
        LeftToRight,
 
        RightToLeft,
 
        BottomToTop,
 
        TopToBottom
    };
 
    QwtColumnRect() : direction(BottomToTop)
    {
    }
 
    QRectF toRect() const;
 
    Qt::Orientation orientation() const
    {
        if (direction == LeftToRight || direction == RightToLeft)
            return Qt::Horizontal;
 
        return Qt::Vertical;
    }
 
    QwtInterval hInterval;
 
    QwtInterval vInterval;
 
    Direction direction;
};
 
class QWT_EXPORT QwtColumnSymbol
{
public:
    enum Style
    {
        NoStyle = -1,
 
        Box,
 
        UserStyle = 1000
    };
 
    enum FrameStyle
    {
        NoFrame,
 
        Plain,
 
        Raised
    };
 
public:
    explicit QwtColumnSymbol(Style = NoStyle);
    virtual ~QwtColumnSymbol();
 
    void setFrameStyle(FrameStyle);
    FrameStyle frameStyle() const;
 
    void setLineWidth(int width);
    int lineWidth() const;
 
    void setStyle(Style);
    Style style() const;
 
    void setPen(const QPen& pen);
    QPen pen() const;
 
    void setBrush(const QBrush& b);
    QBrush brush() const;
 
    virtual void draw(QPainter*, const QwtColumnRect&) const;
 
protected:
    void drawBox(QPainter*, const QwtColumnRect&) const;
 
private:
    QwtColumnSymbol(const QwtColumnSymbol&)            = delete;
    QwtColumnSymbol& operator=(const QwtColumnSymbol&) = delete;
 
    QWT_DECLARE_PRIVATE(QwtColumnSymbol)
};
 
#endif