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33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/******************************************************************************
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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
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#include "qwt_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_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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Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
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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* ) QWT_OVERRIDE;
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virtual void resizeEvent( QResizeEvent* ) QWT_OVERRIDE;
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private:
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class PrivateData;
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PrivateData* m_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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