10 #ifndef QWT_ABSTRACT_LEGEND_H 
   11 #define QWT_ABSTRACT_LEGEND_H 
   13 #include "qwt_global.h" 
   14 #include "qwt_legend_data.h" 
   51     virtual void renderLegend( QPainter *painter, 
 
   52         const QRectF &rect, 
bool fillBackground ) 
const = 0;
 
   55     virtual bool isEmpty() 
const = 0;
 
   57     virtual int scrollExtent( Qt::Orientation ) 
const;
 
   67     virtual void updateLegend( 
const QVariant &itemInfo, 
 
   68         const QList<QwtLegendData> &data ) = 0;
 
Abstract base class for legend widgets. 
Definition: qwt_abstract_legend.h:34