Qwt User's Guide 6.0.2

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qwt_plot_canvas.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_PLOT_CANVAS_H
11 #define QWT_PLOT_CANVAS_H
12
13 #include "qwt_global.h"
14 #include <qframe.h>
15 #include <qpen.h>
16 #include <qpainterpath.h>
17 #include <qbitmap.h>
18
19 class QwtPlot;
20 class QPixmap;
21
29 class QWT_EXPORT QwtPlotCanvas : public QFrame
30 {
31 Q_OBJECT
32
33 public:
34
42 enum PaintAttribute
43 {
55 BackingStore = 1,
56
72 Opaque = 2,
73
89 HackStyledBackground = 4,
90
97 ImmediatePaint = 8
98 };
99
101 typedef QFlags<PaintAttribute> PaintAttributes;
102
109 enum FocusIndicator
110 {
112 NoFocusIndicator,
113
118 CanvasFocusIndicator,
119
125 ItemFocusIndicator
126 };
127
128 explicit QwtPlotCanvas( QwtPlot * );
129 virtual ~QwtPlotCanvas();
130
131 QwtPlot *plot();
132 const QwtPlot *plot() const;
133
134 void setFocusIndicator( FocusIndicator );
135 FocusIndicator focusIndicator() const;
136
137 void setBorderRadius( double );
138 double borderRadius() const;
139
140 QPainterPath borderPath( const QRect &rect ) const;
141 QBitmap borderMask( const QSize & ) const;
142
143 void setPaintAttribute( PaintAttribute, bool on = true );
144 bool testPaintAttribute( PaintAttribute ) const;
145
146 const QPixmap *backingStore() const;
147 void invalidateBackingStore();
148
149 void replot();
150
151 virtual bool event( QEvent * );
152
153 protected:
154 virtual void paintEvent( QPaintEvent * );
155 virtual void resizeEvent( QResizeEvent * );
156
157 virtual void drawFocusIndicator( QPainter * );
158 virtual void drawBorder( QPainter * );
159
160 void updateStyleSheetInfo();
161
162 private:
163 void drawCanvas( QPainter *, bool withBackground );
164
165 class PrivateData;
166 PrivateData *d_data;
167 };
168
169 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCanvas::PaintAttributes )
170
171 #endif