Qwt Polar User's Guide: qwt_polar_canvas.h Source File

Qwt Polar User's Guide 1.1.1

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qwt_polar_canvas.h
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
16 class QPainter;
17 class QwtPolarPlot;
18
27 class QWT_POLAR_EXPORT QwtPolarCanvas: public QFrame
28 {
29 Q_OBJECT
30
31 public:
40 enum PaintAttribute
41 {
47 BackingStore = 0x01
48 };
49
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
68 protected:
69 virtual void paintEvent( QPaintEvent * );
70 virtual void resizeEvent( QResizeEvent * );
71
72 private:
73 class PrivateData;
74 PrivateData *d_data;
75 };
76
77 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarCanvas::PaintAttributes )
78
79 #endif
QwtPolarCanvas::PaintAttribute
PaintAttribute
Paint attributes.
Definition: qwt_polar_canvas.h:40
QwtPolarCanvas::PaintAttributes
QFlags< PaintAttribute > PaintAttributes
Paint attributes.
Definition: qwt_polar_canvas.h:51
QwtPolarCanvas
Canvas of a QwtPolarPlot.
Definition: qwt_polar_canvas.h:27
QwtPolarPlot
A plotting widget, displaying a polar coordinate system.
Definition: qwt_polar_plot.h:46