Base class for plot items representing a series of samples. More...

#include <qwt_plot_seriesitem.h>

Inheritance diagram for QwtPlotSeriesItem:

Public Member Functions
	QwtPlotSeriesItem (const QString &title=QString())

	QwtPlotSeriesItem (const QwtText &title)

virtual	~QwtPlotSeriesItem ()
	Destructor.

void	setOrientation (Qt::Orientation)

Qt::Orientation	orientation () const

virtual void	draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const override
	Draw the complete series. More...

virtual void	drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const =0

virtual QRectF	boundingRect () const override

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &) override
	Update the item to changes of the axes scale division. More...

Public Member Functions inherited from QwtPlotItem
	QwtPlotItem ()

	QwtPlotItem (const QString &title)

	QwtPlotItem (const QwtText &title)

virtual	~QwtPlotItem ()
	Destroy the QwtPlotItem.

void	attach (QwtPlot *plot)
	Attach the item to a plot. More...

void	detach ()
	This method detaches a QwtPlotItem from any QwtPlot it has been associated with. More...

QwtPlot *	plot () const
	Return attached plot.

void	setTitle (const QString &title)

void	setTitle (const QwtText &title)

const QwtText &	title () const

virtual int	rtti () const

void	setItemAttribute (ItemAttribute, bool on=true)

bool	testItemAttribute (ItemAttribute) const

void	setItemInterest (ItemInterest, bool on=true)

bool	testItemInterest (ItemInterest) const

void	setRenderHint (RenderHint, bool on=true)

bool	testRenderHint (RenderHint) const

void	setRenderThreadCount (uint numThreads)

uint	renderThreadCount () const

void	setLegendIconSize (const QSize &)

QSize	legendIconSize () const

double	z () const

void	setZ (double z)
	Set the z value. More...

void	show ()
	Show the item.

void	hide ()
	Hide the item.

virtual void	setVisible (bool)

bool	isVisible () const

void	setAxes (QwtAxisId xAxis, QwtAxisId yAxis)

void	setXAxis (QwtAxisId)

QwtAxisId	xAxis () const
	Return xAxis.

void	setYAxis (QwtAxisId)

QwtAxisId	yAxis () const
	Return yAxis.

virtual void	itemChanged ()

virtual void	legendChanged ()

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Calculate a hint for the canvas margin. More...

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item to changes of the legend info. More...

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding scale rectangle of 2 maps. More...

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding paint rectangle of 2 maps. More...

virtual QList< QwtLegendData >	legendData () const
	Return all information, that is needed to represent the item on the legend. More...

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const

Public Member Functions inherited from QwtAbstractSeriesStore
virtual	~QwtAbstractSeriesStore ()
	Destructor.

Protected Member Functions
virtual void	dataChanged () override
	dataChanged() indicates, that the series has been changed.

Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush. More...

Protected Member Functions inherited from QwtAbstractSeriesStore
virtual void	setRectOfInterest (const QRectF &)=0

virtual QRectF	dataRect () const =0

virtual size_t	dataSize () const =0

Additional Inherited Members
Public Types inherited from QwtPlotItem
enum	RttiValues { Rtti_PlotItem = 0 , Rtti_PlotGrid , Rtti_PlotScale , Rtti_PlotLegend , Rtti_PlotMarker , Rtti_PlotCurve , Rtti_PlotSpectroCurve , Rtti_PlotIntervalCurve , Rtti_PlotHistogram , Rtti_PlotSpectrogram , Rtti_PlotGraphic , Rtti_PlotTradingCurve , Rtti_PlotBarChart , Rtti_PlotMultiBarChart , Rtti_PlotShape , Rtti_PlotTextLabel , Rtti_PlotZone , Rtti_PlotVectorField , Rtti_PlotUserItem = 1000 }
	Runtime type information. More...

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 , Margins = 0x04 }
	Plot Item Attributes. More...

enum	ItemInterest { ScaleInterest = 0x01 , LegendInterest = 0x02 }
	Plot Item Interests. More...

enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints. More...

typedef QFlags< ItemAttribute >	ItemAttributes

typedef QFlags< ItemInterest >	ItemInterests

typedef QFlags< RenderHint >	RenderHints

Detailed Description

Base class for plot items representing a series of samples.

Definition at line 24 of file qwt_plot_seriesitem.h.

Constructor & Destructor Documentation

◆ QwtPlotSeriesItem() [1/2]

QwtPlotSeriesItem::QwtPlotSeriesItem ( const QString & title = QString() )

explicit

Constructor

Parameters

title Title of the curve

Definition at line 40 of file qwt_plot_seriesitem.cpp.

◆ QwtPlotSeriesItem() [2/2]

QwtPlotSeriesItem::QwtPlotSeriesItem ( const QwtText & title )

explicit

Constructor

Parameters

title Title of the curve

Definition at line 29 of file qwt_plot_seriesitem.cpp.

Member Function Documentation

◆ boundingRect()

QRectF QwtPlotSeriesItem::boundingRect ( ) const

overridevirtual

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

Note: A width or height < 0.0 is ignored by the autoscaler

Reimplemented from QwtPlotItem.

Reimplemented in QwtPlotVectorField, QwtPlotTradingCurve, QwtPlotMultiBarChart, QwtPlotIntervalCurve, QwtPlotHistogram, and QwtPlotBarChart.

Definition at line 97 of file qwt_plot_seriesitem.cpp.

◆ draw()

void QwtPlotSeriesItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const

overridevirtual

Draw the complete series.

Parameters

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
canvasRect	Contents rectangle of the canvas

Implements QwtPlotItem.

Definition at line 90 of file qwt_plot_seriesitem.cpp.

◆ drawSeries()

virtual void QwtPlotSeriesItem::drawSeries	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

pure virtual

Draw a subset of the samples

Parameters

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
canvasRect	Contents rectangle of the canvas
from	Index of the first point to be painted
to	Index of the last point to be painted. If to < 0 the curve will be painted to its last point.

Implemented in QwtPlotVectorField, QwtPlotTradingCurve, QwtPlotSpectroCurve, QwtPlotMultiBarChart, QwtPlotIntervalCurve, QwtPlotHistogram, QwtPlotCurve, and QwtPlotBarChart.

◆ orientation()

Qt::Orientation QwtPlotSeriesItem::orientation ( ) const

Returns: Orientation of the plot item

See also: setOrientation()

Definition at line 77 of file qwt_plot_seriesitem.cpp.

◆ setOrientation()

void QwtPlotSeriesItem::setOrientation ( Qt::Orientation orientation )

Set the orientation of the item.

The orientation() might be used in specific way by a plot item. F.e. a QwtPlotCurve uses it to identify how to display the curve int QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.

See also: orientation()

Definition at line 62 of file qwt_plot_seriesitem.cpp.

◆ updateScaleDiv()

void QwtPlotSeriesItem::updateScaleDiv	(	const QwtScaleDiv &	xScaleDiv,
		const QwtScaleDiv &	yScaleDiv
	)

overridevirtual

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()

updateScaleDiv() is only called when the ScaleInterest interest is enabled. The default implementation does nothing.

Parameters

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

See also: QwtPlot::updateAxes(), ScaleInterest

Reimplemented from QwtPlotItem.

Definition at line 102 of file qwt_plot_seriesitem.cpp.

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotSeriesItem() [1/2]

◆ QwtPlotSeriesItem() [2/2]

Member Function Documentation

◆ boundingRect()

◆ draw()

◆ drawSeries()

◆ orientation()

◆ setOrientation()

◆ updateScaleDiv()