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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
3 weeks ago
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* QwtPolar Widget Library
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* Copyright (C) 2008 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_POLAR_CANVAS_H
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#define QWT_POLAR_CANVAS_H 1
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#include "qwt_polar_global.h"
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#include <qwt_point_polar.h>
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#include <qframe.h>
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class QPainter;
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class QwtPolarPlot;
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/*!
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\brief Canvas of a QwtPolarPlot.
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The canvas is the widget, where all polar items are painted to.
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\note In opposite to QwtPlot all axes are painted on the canvas.
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\sa QwtPolarPlot
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*/
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class QWT_POLAR_EXPORT QwtPolarCanvas: public QFrame
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{
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Q_OBJECT
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public:
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/*!
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\brief Paint attributes
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The default setting enables BackingStore
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\sa setPaintAttribute(), testPaintAttribute(), backingStore()
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*/
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enum PaintAttribute
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{
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/*!
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Paint double buffered and reuse the content of the pixmap buffer
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for some spontaneous repaints that happen when a plot gets unhidden,
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deiconified or changes the focus.
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*/
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BackingStore = 0x01
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};
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//! Paint attributes
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typedef QFlags<PaintAttribute> PaintAttributes;
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explicit QwtPolarCanvas( QwtPolarPlot * );
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virtual ~QwtPolarCanvas();
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QwtPolarPlot *plot();
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const QwtPolarPlot *plot() const;
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void setPaintAttribute( PaintAttribute, bool on = true );
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bool testPaintAttribute( PaintAttribute ) const;
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const QPixmap *backingStore() const;
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void invalidateBackingStore();
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QwtPointPolar invTransform( const QPoint & ) const;
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QPoint transform( const QwtPointPolar & ) const;
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protected:
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virtual void paintEvent( QPaintEvent * );
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virtual void resizeEvent( QResizeEvent * );
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private:
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class PrivateData;
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PrivateData *d_data;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarCanvas::PaintAttributes )
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#endif
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