qwt_legend.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
 *****************************************************************************/
 
#ifndef QWT_LEGEND_H
#define QWT_LEGEND_H
 
#include "qwt_global.h"
#include "qwt_abstract_legend.h"
#include "qwt_legend_data.h"
 
#include <qvariant.h>
 
class QScrollBar;
 
class QWT_EXPORT QwtLegend : public QwtAbstractLegend
{
    Q_OBJECT
 
  public:
    explicit QwtLegend( QWidget* parent = NULL );
    virtual ~QwtLegend();
 
    void setMaxColumns( uint numColums );
    uint maxColumns() const;
 
    void setDefaultItemMode( QwtLegendData::Mode );
    QwtLegendData::Mode defaultItemMode() const;
 
    QWidget* contentsWidget();
    const QWidget* contentsWidget() const;
 
    QWidget* legendWidget( const QVariant&  ) const;
    QList< QWidget* > legendWidgets( const QVariant& ) const;
 
    QVariant itemInfo( const QWidget* ) const;
 
    virtual bool eventFilter( QObject*, QEvent* ) QWT_OVERRIDE;
 
    virtual QSize sizeHint() const QWT_OVERRIDE;
    virtual int heightForWidth( int w ) const QWT_OVERRIDE;
 
    QScrollBar* horizontalScrollBar() const;
    QScrollBar* verticalScrollBar() const;
 
    virtual void renderLegend( QPainter*,
        const QRectF&, bool fillBackground ) const QWT_OVERRIDE;
 
    virtual void renderItem( QPainter*,
        const QWidget*, const QRectF&, bool fillBackground ) const;
 
    virtual bool isEmpty() const QWT_OVERRIDE;
    virtual int scrollExtent( Qt::Orientation ) const QWT_OVERRIDE;
 
  Q_SIGNALS:
    void clicked( const QVariant& itemInfo, int index );
 
    void checked( const QVariant& itemInfo, bool on, int index );
 
  public Q_SLOTS:
    virtual void updateLegend( const QVariant&,
        const QList< QwtLegendData >& ) QWT_OVERRIDE;
 
  protected Q_SLOTS:
    void itemClicked();
    void itemChecked( bool );
 
  protected:
    virtual QWidget* createWidget( const QwtLegendData& ) const;
    virtual void updateWidget( QWidget*, const QwtLegendData& );
 
  private:
    void updateTabOrder();
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif