#include <qwt_plot_marker.h>

Inherits QwtPlotItem.

Public Types
enum	ItemAttribute { Legend = 0x01, AutoScale = 0x02 }
typedef QFlags< ItemAttribute >	ItemAttributes
enum	LineStyle { NoLine, HLine, VLine, Cross }
enum	RenderHint { RenderAntialiased = 1 }
typedef QFlags< RenderHint >	RenderHints
enum	RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotUserItem = 1000 }
Public Member Functions
void	attach (QwtPlot *plot)
virtual QRectF	boundingRect () const
void	detach ()
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const
virtual void	drawLegendIdentifier (QPainter *, const QRectF &) const
void	hide ()
bool	isVisible () const
virtual void	itemChanged ()
QwtText	label () const
Qt::Alignment	labelAlignment () const
Qt::Orientation	labelOrientation () const
virtual QWidget *	legendItem () const
const QPen &	linePen () const
LineStyle	lineStyle () const
QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
QwtPlot *	plot () const
	QwtPlotMarker ()
virtual int	rtti () const
QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
void	setAxes (int xAxis, int yAxis)
void	setItemAttribute (ItemAttribute, bool on=true)
void	setLabel (const QwtText &)
void	setLabelAlignment (Qt::Alignment)
void	setLabelOrientation (Qt::Orientation)
void	setLinePen (const QPen &p)
void	setLineStyle (LineStyle st)
void	setRenderHint (RenderHint, bool on=true)
void	setSpacing (int)
void	setSymbol (const QwtSymbol *)
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
void	setValue (double, double)
void	setValue (const QPointF &)
virtual void	setVisible (bool)
void	setXAxis (int axis)
void	setXValue (double)
void	setYAxis (int axis)
void	setYValue (double)
void	setZ (double z)
void	show ()
int	spacing () const
const QwtSymbol *	symbol () const
bool	testItemAttribute (ItemAttribute) const
bool	testRenderHint (RenderHint) const
const QwtText &	title () const
virtual void	updateLegend (QwtLegend *) const
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
QPointF	value () const
int	xAxis () const
double	xValue () const
int	yAxis () const
double	yValue () const
double	z () const
virtual	~QwtPlotMarker ()
Protected Member Functions
virtual void	drawLabel (QPainter *, const QRectF &, const QPointF &) const
virtual void	drawLines (QPainter *, const QRectF &, const QPointF &) 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 setLabel(), a label can be assigned to the marker. The 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 Qt::AlignLeft | Qt::AlignTop.

Member Typedef Documentation

typedef QFlags<ItemAttribute> QwtPlotItem::ItemAttributes [inherited]

Plot Item Attributes.

typedef QFlags<RenderHint> QwtPlotItem::RenderHints [inherited]

Render hints.

Member Enumeration Documentation

enum QwtPlotItem::ItemAttribute [inherited]

Plot Item Attributes

See also:: setItemAttribute(), testItemAttribute()

Enumerator:

Legend	The item is represented on the legend.
AutoScale	The boundingRect() of the item is included in the autoscaling calculation.

enum QwtPlotMarker::LineStyle

Line styles.

See also:: setLineStyle(), lineStyle()

Enumerator:

NoLine	No line.
HLine	A horizontal line.
VLine	A vertical line.
Cross	A crosshair.

enum QwtPlotItem::RenderHint [inherited]

Render hints.

Enumerator:

RenderAntialiased

Enable antialiasing.

enum QwtPlotItem::RttiValues [inherited]

Runtime type information.

RttiValues is used to cast plot items, without having to enable runtime type information of the compiler.

Enumerator:

Rtti_PlotItem	Unspecific value, that can be used, when it doesn't matter.
Rtti_PlotGrid	For QwtPlotGrid.
Rtti_PlotScale	For QwtPlotScaleItem.
Rtti_PlotMarker	For QwtPlotMarker.
Rtti_PlotCurve	For QwtPlotCurve.
Rtti_PlotSpectroCurve	For QwtPlotSpectroCurve.
Rtti_PlotIntervalCurve	For QwtPlotIntervalCurve.
Rtti_PlotHistogram	For QwtPlotHistogram.
Rtti_PlotSpectrogram	For QwtPlotSpectrogram.
Rtti_PlotSVG	For QwtPlotSvgItem.
Rtti_PlotUserItem	Values >= Rtti_PlotUserItem are reserved for plot items not implemented in the Qwt library.

Constructor & Destructor Documentation

QwtPlotMarker::QwtPlotMarker ( ) [explicit]

Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine.

QwtPlotMarker::~QwtPlotMarker ( ) [virtual]

Destructor.

Member Function Documentation

void QwtPlotItem::attach ( QwtPlot * plot ) [inherited]

Attach the item to a plot.

This method will attach a QwtPlotItem to the QwtPlot argument. It will first detach the QwtPlotItem from any plot from a previous call to attach (if necessary). If a NULL argument is passed, it will detach from any QwtPlot it was attached to.

Parameters:

plot	Plot widget

See also:: detach()

QRectF QwtPlotMarker::boundingRect ( ) const [virtual]

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

Reimplemented from QwtPlotItem.

void QwtPlotItem::detach ( ) [inherited]

This method detaches a QwtPlotItem from any QwtPlot it has been associated with.

detach() is equivalent to calling attach( NULL )

See also:: attach()

void QwtPlotMarker::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	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::drawLabel	(	QPainter *	painter,
		const QRectF &	canvasRect,
		const QPointF &	pos
	)		const `[protected, virtual]`

Align and draw the text label of the marker

Parameters:

painter	Painter
canvasRect	Contents rect of the canvas in painter coordinates
pos	Position of the marker, translated into widget coordinates

See also:: drawLabel(), QwtSymbol::drawSymbol()

void QwtPlotMarker::drawLegendIdentifier	(	QPainter *	painter,
		const QRectF &	rect
	)		const `[virtual]`

Draw the identifier representing the marker on the legend.

Parameters:

painter	Painter
rect	Bounding rectangle for the identifier

See also:: updateLegend(), QwtPlotItem::Legend

Reimplemented from QwtLegendItemManager.

void QwtPlotMarker::drawLines	(	QPainter *	painter,
		const QRectF &	canvasRect,
		const QPointF &	pos
	)		const `[protected, virtual]`

Draw the lines marker

Parameters:

painter	Painter
canvasRect	Contents rect of the canvas in painter coordinates
pos	Position of the marker, translated into widget coordinates

See also:: drawLabel(), QwtSymbol::drawSymbol()

void QwtPlotItem::hide ( ) [inherited]

Hide the item.

bool QwtPlotItem::isVisible ( ) const [inherited]

Returns:: true if visible

See also:: setVisible(), show(), hide()

void QwtPlotItem::itemChanged ( ) [virtual, inherited]

Update the legend and call QwtPlot::autoRefresh for the parent plot.

See also:: updateLegend()

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()

QWidget * QwtPlotItem::legendItem ( ) const [virtual, inherited]

Allocate the widget that represents the item on the legend.

The default implementation returns a QwtLegendItem(), but an item could be represented by any type of widget, by overloading legendItem() and updateLegend().

Returns:: QwtLegendItem()

See also:: updateLegend() QwtLegend()

Implements QwtLegendItemManager.

const QPen & QwtPlotMarker::linePen ( ) const

Returns:: the line pen

See also:: setLinePen()

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle ( ) const

Returns:: the line style

See also:: setLineStyle()

QRectF QwtPlotItem::paintRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const `[inherited]`

Calculate the bounding paint rect of 2 maps.

Parameters:

xMap	X map
yMap	X map

Returns:: Bounding paint rect of the scale maps, normalized

QwtPlot * QwtPlotItem::plot ( ) const [inherited]

Return attached plot.

int QwtPlotMarker::rtti ( ) const [virtual]

Returns:: QwtPlotItem::Rtti_PlotMarker

Reimplemented from QwtPlotItem.

QRectF QwtPlotItem::scaleRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const `[inherited]`

Calculate the bounding scale rect of 2 maps.

Parameters:

xMap	X map
yMap	X map

Returns:: Bounding scale rect of the scale maps, normalized

void QwtPlotItem::setAxes	(	int	xAxis,
		int	yAxis
	)		`[inherited]`

Set X and Y axis

The item will painted according to the coordinates its Axes.

Parameters:

xAxis	X Axis
yAxis	Y Axis

See also:: setXAxis(), setYAxis(), xAxis(), yAxis()

void QwtPlotItem::setItemAttribute	(	ItemAttribute	attribute,
		bool	on = `true`
	)		`[inherited]`

Toggle an item attribute

Parameters:

attribute	Attribute type
on	true/false

See also:: testItemAttribute(), ItemAttribute

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.

See also:: labelAlignment(), labelOrientation()

void QwtPlotMarker::setLabelOrientation ( Qt::Orientation orientation )

Set the orientation of the label.

When orientation is Qt::Vertical the label is rotated by 90.0 degrees ( from bottom to top ).

Parameters:

orientation Orientation of the label

See also:: labelOrientation(), setLabelAlignment()

void QwtPlotMarker::setLinePen ( const QPen & pen )

Specify a pen for the line.

Parameters:

pen New pen

See also:: linePen()

void QwtPlotMarker::setLineStyle ( LineStyle style )

Set the line style.

Parameters:

style Line style.

See also:: lineStyle()

void QwtPlotItem::setRenderHint	(	RenderHint	hint,
		bool	on = `true`
	)		`[inherited]`

Toggle an render hint

Parameters:

hint	Render hint
on	true/false

See also:: testRenderHint(), RenderHint

void QwtPlotMarker::setSpacing ( int spacing )

Set the spacing.

When the label is not centered on the marker position, the spacing is the distance between the position and the label.

Parameters:

spacing Spacing

See also:: spacing(), setLabelAlignment()

void QwtPlotMarker::setSymbol ( const QwtSymbol * symbol )

Assign a symbol.

Parameters:

symbol New symbol

See also:: symbol()

void QwtPlotItem::setTitle ( const QString & title ) [inherited]

Set a new title

Parameters:

title Title

See also:: title()

void QwtPlotItem::setTitle ( const QwtText & title ) [inherited]

Set a new title

Parameters:

title Title

See also:: title()

void QwtPlotMarker::setValue	(	double	x,
		double	y
	)

Set Value.

void QwtPlotMarker::setValue ( const QPointF & pos )

Set Value.

void QwtPlotItem::setVisible ( bool on ) [virtual, inherited]

Show/Hide the item

Parameters:

on	Show if true, otherwise hide

See also:: isVisible(), show(), hide()

void QwtPlotItem::setXAxis ( int axis ) [inherited]

Set the X axis

The item will painted according to the coordinates its Axes.

Parameters:

axis X Axis

See also:: setAxes(), setYAxis(), xAxis()

void QwtPlotMarker::setXValue ( double x )

Set X Value.

void QwtPlotItem::setYAxis ( int axis ) [inherited]

Set the Y axis

The item will painted according to the coordinates its Axes.

Parameters:

axis Y Axis

See also:: setAxes(), setXAxis(), yAxis()

void QwtPlotMarker::setYValue ( double y )

Set Y Value.

void QwtPlotItem::setZ ( double z ) [inherited]

Set the z value.

Plot items are painted in increasing z-order.

Parameters:

z Z-value

See also:: z(), QwtPlotDict::itemList()

void QwtPlotItem::show ( ) [inherited]

Show the item.

int QwtPlotMarker::spacing ( ) const

Returns:: the spacing

See also:: setSpacing()

const QwtSymbol * QwtPlotMarker::symbol ( ) const

Returns:: the symbol

See also:: setSymbol(), QwtSymbol

bool QwtPlotItem::testItemAttribute ( ItemAttribute attribute ) const [inherited]

Test an item attribute

Parameters:

attribute Attribute type

Returns:: true/false

See also:: setItemAttribute(), ItemAttribute

bool QwtPlotItem::testRenderHint ( RenderHint hint ) const [inherited]

Test a render hint

Parameters:

hint	Render hint

Returns:: true/false

See also:: setRenderHint(), RenderHint

const QwtText & QwtPlotItem::title ( ) const [inherited]

Returns:: Title of the item

See also:: setTitle()

void QwtPlotMarker::updateLegend ( QwtLegend * legend ) const [virtual]

Update the widget that represents the item on the legend.

Parameters:

legend Legend

See also:: drawLegendIdentifier(), legendItem(), itemChanged(), QwtLegend()

Note:: In the default setting QwtPlotItem::Legend is disabled

Reimplemented from QwtPlotItem.

void QwtPlotItem::updateScaleDiv	(	const QwtScaleDiv &	xScaleDiv,
		const QwtScaleDiv &	yScaleDiv
	)		`[virtual, inherited]`

Update the item to changes of the axes scale division.

Update the item, when the axes of plot have changed. The default implementation does nothing, but items that depend on the scale division (like QwtPlotGrid()) have to reimplement updateScaleDiv()

Parameters:

xScaleDiv	Scale division of the x-axis
yScaleDiv	Scale division of the y-axis

See also:: QwtPlot::updateAxes()

Reimplemented in QwtPlotScaleItem, QwtPlotSeriesItem< T >, QwtPlotSeriesItem< QwtIntervalSample >, QwtPlotSeriesItem< QPointF >, QwtPlotSeriesItem< QwtPoint3D >, and QwtPlotGrid.

QPointF QwtPlotMarker::value ( ) const

Return Value.

int QwtPlotItem::xAxis ( ) const [inherited]

Return xAxis.

double QwtPlotMarker::xValue ( ) const

Return x Value.

int QwtPlotItem::yAxis ( ) const [inherited]

Return yAxis.

double QwtPlotMarker::yValue ( ) const

Return y Value.

double QwtPlotItem::z ( ) const [inherited]

Plot items are painted in increasing z-order.

Returns:: setZ(), QwtPlotDict::itemList()

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation