qwt_plot_layout.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_LAYOUT_H
#define QWT_PLOT_LAYOUT_H
 
#include "qwt_global.h"
#include "qwt_plot.h"
#include "qwt_axis_id.h"
class QwtPlotLayoutEngine;
class QWT_EXPORT QwtPlotLayout
{
public:
    enum Option
    {
        AlignScales = 0x01,
 
        IgnoreScrollbars = 0x02,
 
        IgnoreFrames = 0x04,
 
        IgnoreLegend = 0x08,
 
        IgnoreTitle = 0x10,
 
        IgnoreFooter = 0x20
    };
 
    Q_DECLARE_FLAGS(Options, Option)
 
    explicit QwtPlotLayout();
    virtual ~QwtPlotLayout();
 
    void setCanvasMargin(int margin, int axis = -1);
    int canvasMargin(int axisId) const;
 
    void setAlignCanvasToScales(bool);
 
    void setAlignCanvasToScale(int axisId, bool);
    bool alignCanvasToScale(int axisId) const;
 
    void setSpacing(int);
    int spacing() const;
 
    void setLegendPosition(QwtPlot::LegendPosition pos, double ratio);
    void setLegendPosition(QwtPlot::LegendPosition pos);
    QwtPlot::LegendPosition legendPosition() const;
 
    void setLegendRatio(double ratio);
    double legendRatio() const;
 
    virtual QSize minimumSizeHint(const QwtPlot*) const;
 
    virtual void activate(const QwtPlot* plot, const QRectF& plotRect, Options options = Options());
 
    virtual void invalidate();
 
    QRectF titleRect() const;
    QRectF footerRect() const;
    QRectF legendRect() const;
    QRectF scaleRect(QwtAxisId) const;
    QRectF canvasRect() const;
 
protected:
    void setTitleRect(const QRectF&);
    void setFooterRect(const QRectF&);
    void setLegendRect(const QRectF&);
    void setScaleRect(QwtAxisId, const QRectF&);
    void setCanvasRect(const QRectF&);
 
    QwtPlotLayoutEngine* layoutEngine();
 
    void doActivate(const QwtPlot* plot, const QRectF& plotRect, Options options = Options());
 
private:
    Q_DISABLE_COPY(QwtPlotLayout)
 
    class PrivateData;
    PrivateData* m_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QwtPlotLayout::Options)
 
#endif