qwt_plot_directpainter.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_DIRECT_PAINTER_H
#define QWT_PLOT_DIRECT_PAINTER_H
 
#include "qwt_global.h"
#include <qobject.h>
 
class QRegion;
class QwtPlotSeriesItem;
 
class QWT_EXPORT QwtPlotDirectPainter : public QObject
{
  public:
    enum Attribute
    {
        AtomicPainter = 0x01,
 
        FullRepaint = 0x02,
 
        CopyBackingStore = 0x04
    };
 
Q_DECLARE_FLAGS( Attributes, Attribute )
 
    
explicit QwtPlotDirectPainter( QObject* parent = nullptr );
 
virtual ~QwtPlotDirectPainter();
 
void setAttribute( Attribute, bool on );
 
bool testAttribute( Attribute ) const;
 
void setClipping( bool );
 
bool hasClipping() const;
 
void setClipRegion( const QRegion& );
 
QRegion clipRegion() const;
 
void drawSeries( QwtPlotSeriesItem*, int from, int to );
 
void reset();
 
virtual bool eventFilter( QObject*, QEvent* ) override;
 
  private:
    class PrivateData;
    PrivateData* m_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotDirectPainter::Attributes )
 
#endif