131 lines
3.3 KiB
C
131 lines
3.3 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_MARKER_H
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#define QWT_PLOT_MARKER_H
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#include <qpen.h>
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#include <qfont.h>
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#include <qstring.h>
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#include <qbrush.h>
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#include "qwt_global.h"
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#include "qwt_plot_item.h"
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class QRectF;
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class QwtText;
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class QwtSymbol;
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/*!
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\brief A class for drawing markers
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A marker can be a horizontal line, a vertical line,
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a symbol, a label or any combination of them, which can
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be drawn around a center point inside a bounding rectangle.
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The setSymbol() member assigns a symbol to the marker.
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The symbol is drawn at the specified point.
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With setLabel(), a label can be assigned to the marker.
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The setLabelAlignment() member specifies where the label is
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drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation)
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are valid. The interpretation of the alignment depends on the marker's
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line style. The alignment refers to the center point of
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the marker, which means, for example, that the label would be printed
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left above the center point if the alignment was set to
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Qt::AlignLeft | Qt::AlignTop.
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\note QwtPlotTextLabel is intended to align a text label
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according to the geometry of canvas
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( unrelated to plot coordinates )
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*/
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class QWT_EXPORT QwtPlotMarker: public QwtPlotItem
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{
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public:
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/*!
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Line styles.
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\sa setLineStyle(), lineStyle()
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*/
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enum LineStyle
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{
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//! No line
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NoLine,
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//! A horizontal line
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HLine,
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//! A vertical line
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VLine,
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//! A crosshair
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Cross
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};
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explicit QwtPlotMarker( const QString &title = QString() );
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explicit QwtPlotMarker( const QwtText &title );
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virtual ~QwtPlotMarker();
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virtual int rtti() const;
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double xValue() const;
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double yValue() const;
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QPointF value() const;
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void setXValue( double );
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void setYValue( double );
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void setValue( double, double );
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void setValue( const QPointF & );
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void setLineStyle( LineStyle );
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LineStyle lineStyle() const;
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void setLinePen( const QColor &, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
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void setLinePen( const QPen & );
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const QPen &linePen() const;
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void setSymbol( const QwtSymbol * );
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const QwtSymbol *symbol() const;
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void setLabel( const QwtText& );
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QwtText label() const;
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void setLabelAlignment( Qt::Alignment );
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Qt::Alignment labelAlignment() const;
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void setLabelOrientation( Qt::Orientation );
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Qt::Orientation labelOrientation() const;
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void setSpacing( int );
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int spacing() 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 & ) const;
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virtual QRectF boundingRect() const;
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virtual QwtGraphic legendIcon( int index, const QSizeF & ) const;
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protected:
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virtual void drawLines( QPainter *,
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const QRectF &, const QPointF & ) const;
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virtual void drawLabel( QPainter *,
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const QRectF &, const QPointF & ) const;
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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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#endif
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