source: ntrip/trunk/BNC/qwt/qwt_abstract_legend.h@ 10298

Last change on this file since 10298 was 9383, checked in by stoecker, 4 years ago

update to qwt verion 6.1.1 to fix build with newer Qt5

File size: 2.0 KB
Line 
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
18class QVariant;
19
20/*!
21 \brief Abstract base class for legend widgets
22
23 Legends, that need to be under control of the QwtPlot layout system
24 need to be derived from QwtAbstractLegend.
25
26 \note Other type of legends can be implemented by connecting to
27 the QwtPlot::legendDataChanged() signal. But as these legends
28 are unknown to the plot layout system the layout code
29 ( on screen and for QwtPlotRenderer ) need to be organized
30 in application code.
31
32 \sa QwtLegend
33 */
34class QWT_EXPORT QwtAbstractLegend : public QFrame
35{
36 Q_OBJECT
37
38public:
39 explicit QwtAbstractLegend( QWidget *parent = NULL );
40 virtual ~QwtAbstractLegend();
41
42 /*!
43 Render the legend into a given rectangle.
44
45 \param painter Painter
46 \param rect Bounding rectangle
47 \param fillBackground When true, fill rect with the widget background
48
49 \sa renderLegend() is used by QwtPlotRenderer
50 */
51 virtual void renderLegend( QPainter *painter,
52 const QRectF &rect, bool fillBackground ) const = 0;
53
54 //! \return True, when no plot item is inserted
55 virtual bool isEmpty() const = 0;
56
57 virtual int scrollExtent( Qt::Orientation ) const;
58
59public Q_SLOTS:
60
61 /*!
62 \brief Update the entries for a plot item
63
64 \param itemInfo Info about an item
65 \param data List of legend entry attributes for the item
66 */
67 virtual void updateLegend( const QVariant &itemInfo,
68 const QList<QwtLegendData> &data ) = 0;
69};
70
71#endif
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