qwt_legend.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * 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 <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 * );
 
    virtual QSize sizeHint() const;
    virtual int heightForWidth( int width ) const;
 
    QScrollBar *horizontalScrollBar() const;
    QScrollBar *verticalScrollBar() const;
 
    virtual void renderLegend( QPainter *,
        const QRectF &, bool fillBackground ) const;
 
    virtual void renderItem( QPainter *,
        const QWidget *, const QRectF &, bool fillBackground ) const;
 
    virtual bool isEmpty() const;
    virtual int scrollExtent( Qt::Orientation ) const;
 
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> & );
 
protected Q_SLOTS:
    void itemClicked();
    void itemChecked( bool );
 
protected:
    virtual QWidget *createWidget( const QwtLegendData & ) const;
    virtual void updateWidget( QWidget *widget, const QwtLegendData & );
 
private:
    void updateTabOrder();
 
    class PrivateData;
    PrivateData *d_data;
};
 
#endif