qwt_legend_label.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_LEGEND_LABEL_H
#define QWT_LEGEND_LABEL_H
 
#include "qwt_global.h"
#include "qwt_text_label.h"
#include "qwt_legend_data.h"
 
class QwtText;
 
class QWT_EXPORT QwtLegendLabel : public QwtTextLabel
{
    Q_OBJECT
  public:
    // Constructor for QwtLegendLabel
    explicit QwtLegendLabel( QWidget* parent = 0 );
    
    // Destructor for QwtLegendLabel
    virtual ~QwtLegendLabel();
 
    // Set the legend data
    void setData( const QwtLegendData& );
    
    // Return the legend data
    const QwtLegendData& data() const;
 
    // Set the item mode
    void setItemMode( QwtLegendData::Mode );
    
    // Return the item mode
    QwtLegendData::Mode itemMode() const;
 
    // Set the spacing between icon and text
    void setSpacing( int spacing );
    
    // Return the spacing
    int spacing() const;
 
    // Set the text label
    virtual void setText( const QwtText& ) override;
 
    // Set the icon
    void setIcon( const QPixmap& );
    
    // Return the icon
    QPixmap icon() const;
 
    // Return the size hint
    virtual QSize sizeHint() const override;
 
    // Return whether the item is checked
    bool isChecked() const;
 
  public Q_SLOTS:
    // Set whether the item is checked
    void setChecked( bool on );
 
  Q_SIGNALS:
    void clicked();
 
    void pressed();
 
    void released();
 
    void checked( bool );
 
  protected:
    void setDown( bool );
    
    bool isDown() const;
 
    virtual void paintEvent( QPaintEvent* ) override;
    
    virtual void mousePressEvent( QMouseEvent* ) override;
    
    virtual void mouseReleaseEvent( QMouseEvent* ) override;
    
    virtual void keyPressEvent( QKeyEvent* ) override;
    
    virtual void keyReleaseEvent( QKeyEvent* ) override;
 
  private:
    class PrivateData;
    PrivateData* m_data;
};
 
#endif