Qwt User's Guide  6.1.3
qwt_abstract_legend.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2  * Qwt Widget Library
3  * Copyright (C) 1997 Josef Wilgen
4  * Copyright (C) 2002 Uwe Rathmann
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the Qwt License, Version 1.0
8  *****************************************************************************/
9 
10 #ifndef QWT_ABSTRACT_LEGEND_H
11 #define QWT_ABSTRACT_LEGEND_H
12 
13 #include "qwt_global.h"
14 #include "qwt_legend_data.h"
15 #include <qframe.h>
16 #include <qlist.h>
17 
18 class QVariant;
19 
34 class QWT_EXPORT QwtAbstractLegend : public QFrame
35 {
36  Q_OBJECT
37 
38 public:
39  explicit QwtAbstractLegend( QWidget *parent = NULL );
40  virtual ~QwtAbstractLegend();
41 
51  virtual void renderLegend( QPainter *painter,
52  const QRectF &rect, bool fillBackground ) const = 0;
53 
55  virtual bool isEmpty() const = 0;
56 
57  virtual int scrollExtent( Qt::Orientation ) const;
58 
59 public Q_SLOTS:
60 
67  virtual void updateLegend( const QVariant &itemInfo,
68  const QList<QwtLegendData> &data ) = 0;
69 };
70 
71 #endif
Abstract base class for legend widgets.
Definition: qwt_abstract_legend.h:34