112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 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_PLOT_SHAPE_ITEM_H
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#define QWT_PLOT_SHAPE_ITEM_H
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#include "qwt_global.h"
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#include "qwt_plot_item.h"
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#include <qpainterpath.h>
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/*!
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\brief A plot item, which displays any graphical shape,
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that can be defined by a QPainterPath
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A QPainterPath is a shape composed from intersecting and uniting
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regions, rectangles, ellipses or irregular areas defined by lines, and curves.
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QwtPlotShapeItem displays a shape with a pen and brush.
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QwtPlotShapeItem offers a couple of optimizations like clipping or weeding.
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These algorithms need to convert the painter path into polygons that might be
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less performant for paths built from curves and ellipses.
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\sa QwtPlotZone
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*/
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class QWT_EXPORT QwtPlotShapeItem: public QwtPlotItem
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{
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public:
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/*!
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Attributes to modify the drawing algorithm.
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The default disables all attributes
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\sa setPaintAttribute(), testPaintAttribute()
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*/
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enum PaintAttribute
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{
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/*!
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Clip polygons before painting them. In situations, where points
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are far outside the visible area (f.e when zooming deep) this
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might be a substantial improvement for the painting performance
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But polygon clipping will convert the painter path into
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polygons what might introduce a negative impact on the
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performance of paths composed from curves or ellipses.
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*/
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ClipPolygons = 0x01,
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};
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//! Paint attributes
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typedef QFlags<PaintAttribute> PaintAttributes;
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//! Mode how to display the item on the legend
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enum LegendMode
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{
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//! Display a scaled down version of the shape
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LegendShape,
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//! Display a filled rectangle
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LegendColor
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};
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explicit QwtPlotShapeItem( const QString &title = QString() );
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explicit QwtPlotShapeItem( const QwtText &title );
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virtual ~QwtPlotShapeItem();
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void setPaintAttribute( PaintAttribute, bool on = true );
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bool testPaintAttribute( PaintAttribute ) const;
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void setLegendMode( LegendMode );
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LegendMode legendMode() const;
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void setRect( const QRectF & );
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void setPolygon( const QPolygonF & );
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void setShape( const QPainterPath & );
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QPainterPath shape() const;
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void setPen( const QColor &, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
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void setPen( const QPen & );
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QPen pen() const;
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void setBrush( const QBrush & );
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QBrush brush() const;
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void setRenderTolerance( double );
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double renderTolerance() const;
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virtual QRectF boundingRect() const;
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virtual void draw( QPainter *,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRectF &canvasRect ) const;
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virtual QwtGraphic legendIcon( int index, const QSizeF & ) const;
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virtual int rtti() const;
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private:
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void init();
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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