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

#include <qwt_plot_seriesitem.h>

Inheritance diagram for QwtPlotSeriesItem:

Classes
class	PrivateData
Public Member Functions
virtual QRectF	boundingRect () const
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const
	Draw the complete series.
virtual void	drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const =0
Qt::Orientation	orientation () const
	QwtPlotSeriesItem (const QString &title=QString::null)
	QwtPlotSeriesItem (const QwtText &title)
void	setOrientation (Qt::Orientation)
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item to changes of the axes scale division.
virtual	~QwtPlotSeriesItem ()
	Destructor.
Protected Member Functions
virtual void	dataChanged ()
	dataChanged() indicates, that the series has been changed.
Private Attributes
PrivateData *	d_data

Detailed Description

Base class for plot items representing a series of samples.

Definition at line 22 of file qwt_plot_seriesitem.h.

Constructor & Destructor Documentation

QwtPlotSeriesItem::QwtPlotSeriesItem ( const QString & title = QString::null ) [explicit]

Constructor

Parameters:

title Title of the curve

Definition at line 38 of file qwt_plot_seriesitem.cpp.

QwtPlotSeriesItem::QwtPlotSeriesItem ( const QwtText & title ) [explicit]

Constructor

Parameters:

title Title of the curve

Definition at line 27 of file qwt_plot_seriesitem.cpp.

QwtPlotSeriesItem::~QwtPlotSeriesItem ( ) [virtual]

Destructor.

Definition at line 45 of file qwt_plot_seriesitem.cpp.

Member Function Documentation

QRectF QwtPlotSeriesItem::boundingRect ( ) const [virtual]

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 QwtPlotTradingCurve, QwtPlotIntervalCurve, QwtPlotHistogram, QwtPlotBarChart, and QwtPlotMultiBarChart.

Definition at line 94 of file qwt_plot_seriesitem.cpp.

void QwtPlotSeriesItem::dataChanged ( ) [protected, virtual]

dataChanged() indicates, that the series has been changed.

Implements QwtAbstractSeriesStore.

Definition at line 109 of file qwt_plot_seriesitem.cpp.

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

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 87 of file qwt_plot_seriesitem.cpp.

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 QwtPlotCurve, QwtPlotTradingCurve, QwtPlotIntervalCurve, QwtPlotHistogram, QwtPlotBarChart, QwtPlotMultiBarChart, and QwtPlotSpectroCurve.

Qt::Orientation QwtPlotSeriesItem::orientation ( ) const

Returns:: Orientation of the plot item

See also:: setOrientation()

Definition at line 74 of file qwt_plot_seriesitem.cpp.

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 59 of file qwt_plot_seriesitem.cpp.

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

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: