#include <qwt_plot_marker.h>

Inheritance diagram for QwtPlotMarker:

Public Types
enum	LineStyle { NoLine, HLine, VLine, Cross }
Public Types inherited from QwtPlotItem
enum	ItemAttribute { Legend = 1, AutoScale = 2 }
enum	RenderHint { RenderAntialiased = 1 }
enum	RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotUserItem = 1000 }

Public Member Functions
	QwtPlotMarker ()
virtual	~QwtPlotMarker ()
virtual QwtDoubleRect	boundingRect () const
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &) const
QwtText	label () const
Qt::Alignment	labelAlignment () const
Qt::Orientation	labelOrientation () const
const QPen &	linePen () const
LineStyle	lineStyle () const
virtual int	rtti () const
void	setLabel (const QwtText &)
void	setLabelAlignment (Qt::Alignment)
void	setLabelOrientation (Qt::Orientation)
void	setLinePen (const QPen &p)
void	setLineStyle (LineStyle st)
void	setSpacing (int)
void	setSymbol (const QwtSymbol &s)
void	setValue (double, double)
void	setValue (const QwtDoublePoint &)
void	setXValue (double)
void	setYValue (double)
int	spacing () const
const QwtSymbol &	symbol () const
QwtDoublePoint	value () const
double	xValue () const
double	yValue () const
Public Member Functions inherited from QwtPlotItem
	QwtPlotItem (const QwtText &title=QwtText())
virtual	~QwtPlotItem ()
void	attach (QwtPlot *plot)
void	detach ()
void	hide ()
QwtDoubleRect	invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRect &) const
bool	isVisible () const
virtual void	itemChanged ()
virtual QWidget *	legendItem () const
QRect	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
QwtPlot *	plot () const
QwtDoubleRect	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
void	setAxis (int xAxis, int yAxis)
void	setItemAttribute (ItemAttribute, bool on=true)
void	setRenderHint (RenderHint, bool on=true)
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
virtual void	setVisible (bool)
void	setXAxis (int axis)
void	setYAxis (int axis)
void	setZ (double z)
void	show ()
bool	testItemAttribute (ItemAttribute) const
bool	testRenderHint (RenderHint) const
const QwtText &	title () const
QRect	transform (const QwtScaleMap &, const QwtScaleMap &, const QwtDoubleRect &) const
virtual void	updateLegend (QwtLegend *) const
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
int	xAxis () const
int	yAxis () const
double	z () const
Public Member Functions inherited from QwtLegendItemManager
	QwtLegendItemManager ()
virtual	~QwtLegendItemManager ()

Protected Member Functions
void	drawAt (QPainter *, const QRect &, const QPoint &) const

Detailed Description

A class for drawing markers.

A marker can be a horizontal line, a vertical line, a symbol, a label or any combination of them, which can be drawn around a center point inside a bounding rectangle.

The QwtPlotMarker::setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.

With QwtPlotMarker::setLabel(), a label can be assigned to the marker. The QwtPlotMarker::setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The interpretation of the alignment depends on the marker's line style. The alignment refers to the center point of the marker, which means, for example, that the label would be printed left above the center point if the alignment was set to AlignLeft|AlignTop.

Member Enumeration Documentation

enum QwtPlotMarker::LineStyle

Line styles.

See also:: setLineStyle(), lineStyle()

Member Function Documentation

QwtDoubleRect QwtPlotMarker::boundingRect ( ) const

virtual

Returns:: An invalid bounding rect: QwtDoubleRect(1.0, 1.0, -2.0, -2.0)

Reimplemented from QwtPlotItem.

void QwtPlotMarker::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRect &	canvasRect
	)		const

virtual

Draw the marker

Parameters:

painter	Painter
xMap	x Scale Map
yMap	y Scale Map
canvasRect	Contents rect of the canvas in painter coordinates

Implements QwtPlotItem.

void QwtPlotMarker::drawAt	(	QPainter *	painter,
		const QRect &	canvasRect,
		const QPoint &	pos
	)		const

protected

Draw the marker at a specific position

Parameters:

painter	Painter
canvasRect	Contents rect of the canvas in painter coordinates
pos	Position of the marker in painter coordinates

QwtText QwtPlotMarker::label ( ) const

Returns:: the label

See also:: setLabel()

Qt::Alignment QwtPlotMarker::labelAlignment ( ) const

Returns:: the label alignment

See also:: setLabelAlignment(), setLabelOrientation()

Qt::Orientation QwtPlotMarker::labelOrientation ( ) const

Returns:: the label orientation

See also:: setLabelOrientation(), labelAlignment()

const QPen & QwtPlotMarker::linePen ( ) const

Returns:: the line pen

See also:: setLinePen()

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle ( ) const

Returns:: the line style

See also:: For a description of line styles, see QwtPlotMarker::setLineStyle()

int QwtPlotMarker::rtti ( ) const

virtual

Returns:: QwtPlotItem::Rtti_PlotMarker

Reimplemented from QwtPlotItem.

void QwtPlotMarker::setLabel ( const QwtText & label )

Set the label.

Parameters:

label label text

See also:: label()

void QwtPlotMarker::setLabelAlignment ( Qt::Alignment align )

Set the alignment of the label.

In case of QwtPlotMarker::HLine the alignment is relative to the y position of the marker, but the horizontal flags correspond to the canvas rectangle. In case of QwtPlotMarker::VLine the alignment is relative to the x position of the marker, but the vertical flags correspond to the canvas rectangle.

In all other styles the alignment is relative to the marker's position.

Parameters:

align Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight, AlignCenter, AlgnHCenter, AlignVCenter.