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111 lines
3.2 KiB
111 lines
3.2 KiB
/* -*- 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::null ); |
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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 *p, |
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const QwtScaleMap &xMap, const QwtScaleMap &yMap, |
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const QRectF &rect ) 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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