Qwt User's Guide: qwt_abstract_legend.h Source File

Qwt User's Guide 6.1.5

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
QwtAbstractLegend
Abstract base class for legend widgets.
Definition: qwt_abstract_legend.h:34