source: ntrip/branches/BNC_2.12/qwtpolar/qwt_polar_canvas.h@ 8142

Last change on this file since 8142 was 4272, checked in by mervart, 10 years ago
File size: 2.0 KB
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1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * QwtPolar Widget Library
3 * Copyright (C) 2008 Uwe Rathmann
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the Qwt License, Version 1.0
7 *****************************************************************************/
8
9#ifndef QWT_POLAR_CANVAS_H
10#define QWT_POLAR_CANVAS_H 1
11
12#include "qwt_polar_global.h"
13#include <qwt_point_polar.h>
14#include <qframe.h>
15
16class QPainter;
17class QwtPolarPlot;
18
19/*!
20 \brief Canvas of a QwtPolarPlot.
21
22 The canvas is the widget, where all polar items are painted to.
23
24 \note In opposite to QwtPlot all axes are painted on the canvas.
25 \sa QwtPolarPlot
26*/
27class QWT_POLAR_EXPORT QwtPolarCanvas: public QFrame
28{
29 Q_OBJECT
30
31public:
32 /*!
33 \brief Paint attributes
34
35 The default setting enables BackingStore
36
37 \sa setPaintAttribute(), testPaintAttribute(), backingStore()
38 */
39
40 enum PaintAttribute
41 {
42 /*!
43 Paint double buffered and reuse the content of the pixmap buffer
44 for some spontaneous repaints that happen when a plot gets unhidden,
45 deiconified or changes the focus.
46 */
47 BackingStore = 0x01
48 };
49
50 //! Paint attributes
51 typedef QFlags<PaintAttribute> PaintAttributes;
52
53 explicit QwtPolarCanvas( QwtPolarPlot * );
54 virtual ~QwtPolarCanvas();
55
56 QwtPolarPlot *plot();
57 const QwtPolarPlot *plot() const;
58
59 void setPaintAttribute( PaintAttribute, bool on = true );
60 bool testPaintAttribute( PaintAttribute ) const;
61
62 const QPixmap *backingStore() const;
63 void invalidateBackingStore();
64
65 QwtPointPolar invTransform( const QPoint & ) const;
66 QPoint transform( const QwtPointPolar & ) const;
67
68protected:
69 virtual void paintEvent( QPaintEvent * );
70 virtual void resizeEvent( QResizeEvent * );
71
72private:
73 class PrivateData;
74 PrivateData *d_data;
75};
76
77Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarCanvas::PaintAttributes )
78
79#endif
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