118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_LEGEND_H
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#define QWT_LEGEND_H
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#include "qwt_global.h"
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#include "qwt_abstract_legend.h"
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#include <qvariant.h>
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class QScrollBar;
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/*!
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\brief The legend widget
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The QwtLegend widget is a tabular arrangement of legend items. Legend
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items might be any type of widget, but in general they will be
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a QwtLegendLabel.
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\sa QwtLegendLabel, QwtPlotItem, QwtPlot
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*/
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class QWT_EXPORT QwtLegend : public QwtAbstractLegend
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{
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Q_OBJECT
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public:
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explicit QwtLegend( QWidget *parent = NULL );
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virtual ~QwtLegend();
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void setMaxColumns( uint numColums );
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uint maxColumns() const;
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void setDefaultItemMode( QwtLegendData::Mode );
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QwtLegendData::Mode defaultItemMode() const;
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QWidget *contentsWidget();
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const QWidget *contentsWidget() const;
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QWidget *legendWidget( const QVariant & ) const;
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QList<QWidget *> legendWidgets( const QVariant & ) const;
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QVariant itemInfo( const QWidget * ) const;
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virtual bool eventFilter( QObject *, QEvent * );
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virtual QSize sizeHint() const;
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virtual int heightForWidth( int width ) const;
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QScrollBar *horizontalScrollBar() const;
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QScrollBar *verticalScrollBar() const;
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virtual void renderLegend( QPainter *,
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const QRectF &, bool fillBackground ) const;
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virtual void renderItem( QPainter *,
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const QWidget *, const QRectF &, bool fillBackground ) const;
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virtual bool isEmpty() const;
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virtual int scrollExtent( Qt::Orientation ) const;
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Q_SIGNALS:
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/*!
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A signal which is emitted when the user has clicked on
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a legend label, which is in QwtLegendData::Clickable mode.
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\param itemInfo Info for the item item of the
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selected legend item
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\param index Index of the legend label in the list of widgets
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that are associated with the plot item
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\note clicks are disabled as default
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\sa setDefaultItemMode(), defaultItemMode(), QwtPlot::itemToInfo()
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*/
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void clicked( const QVariant &itemInfo, int index );
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/*!
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A signal which is emitted when the user has clicked on
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a legend label, which is in QwtLegendData::Checkable mode
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\param itemInfo Info for the item of the
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selected legend label
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\param index Index of the legend label in the list of widgets
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that are associated with the plot item
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\param on True when the legend label is checked
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\note clicks are disabled as default
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\sa setDefaultItemMode(), defaultItemMode(), QwtPlot::itemToInfo()
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*/
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void checked( const QVariant &itemInfo, bool on, int index );
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public Q_SLOTS:
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virtual void updateLegend( const QVariant &,
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const QList<QwtLegendData> & );
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protected Q_SLOTS:
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void itemClicked();
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void itemChecked( bool );
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protected:
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virtual QWidget *createWidget( const QwtLegendData & ) const;
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virtual void updateWidget( QWidget *widget, const QwtLegendData & );
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private:
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void updateTabOrder();
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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