Sources_For_Linux/Qwt/doc/man/man3/QwtPlotSeriesItem.3

.TH "QwtPlotSeriesItem" 3 "Mon Dec 28 2020" "Version 6.1.6" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtPlotSeriesItem \- Base class for plot items representing a series of samples\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_plot_seriesitem\&.h>\fP
.PP
Inherits \fBQwtPlotItem\fP, and \fBQwtAbstractSeriesStore\fP\&.
.PP
Inherited by \fBQwtPlotAbstractBarChart\fP, \fBQwtPlotCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotSpectroCurve\fP, and \fBQwtPlotTradingCurve\fP\&.
.SS "Public Member Functions"

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.RI "\fBQwtPlotSeriesItem\fP (const QString &\fBtitle\fP=QString())"
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.RI "\fBQwtPlotSeriesItem\fP (const \fBQwtText\fP &\fBtitle\fP)"
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.RI "virtual \fB~QwtPlotSeriesItem\fP ()"
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.RI "Destructor\&. "
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.RI "void \fBsetOrientation\fP (Qt::Orientation)"
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.RI "Qt::Orientation \fBorientation\fP () const"
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.RI "virtual void \fBdraw\fP (QPainter *, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &) const"
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.RI "Draw the complete series\&. "
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.RI "virtual void \fBdrawSeries\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, int from, int to) const =0"
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.RI "virtual QRectF \fBboundingRect\fP () const"
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.RI "virtual void \fBupdateScaleDiv\fP (const \fBQwtScaleDiv\fP &, const \fBQwtScaleDiv\fP &)"
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.RI "Update the item to changes of the axes scale division\&. "
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.SS "Protected Member Functions"

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.RI "virtual void \fBdataChanged\fP ()"
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.RI "\fBdataChanged()\fP indicates, that the series has been changed\&. "
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
Base class for plot items representing a series of samples\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtPlotSeriesItem::QwtPlotSeriesItem (const QString & title = \fCQString()\fP)\fC [explicit]\fP"
Constructor 
.PP
\fBParameters\fP
.RS 4
\fItitle\fP Title of the curve 
.RE
.PP

.SS "QwtPlotSeriesItem::QwtPlotSeriesItem (const \fBQwtText\fP & title)\fC [explicit]\fP"
Constructor 
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\fBParameters\fP
.RS 4
\fItitle\fP Title of the curve 
.RE
.PP

.SH "Member Function Documentation"
.PP 
.SS "QRectF QwtPlotSeriesItem::boundingRect () const\fC [virtual]\fP"

.PP
\fBReturns\fP
.RS 4
An invalid bounding rect: QRectF(1\&.0, 1\&.0, -2\&.0, -2\&.0) 
.RE
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\fBNote\fP
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A width or height < 0\&.0 is ignored by the autoscaler 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotItem\fP\&.
.PP
Reimplemented in \fBQwtPlotTradingCurve\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, and \fBQwtPlotBarChart\fP\&.
.SS "void QwtPlotSeriesItem::draw (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect) const\fC [virtual]\fP"

.PP
Draw the complete series\&. 
.PP
\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
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\fIxMap\fP Maps x-values into pixel coordinates\&. 
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\fIyMap\fP Maps y-values into pixel coordinates\&. 
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\fIcanvasRect\fP Contents rectangle of the canvas 
.RE
.PP

.PP
Implements \fBQwtPlotItem\fP\&.
.SS "virtual void QwtPlotSeriesItem::drawSeries (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, int from, int to) const\fC [pure virtual]\fP"
Draw a subset of the samples
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\fBParameters\fP
.RS 4
\fIpainter\fP Painter 
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\fIxMap\fP Maps x-values into pixel coordinates\&. 
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\fIyMap\fP Maps y-values into pixel coordinates\&. 
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\fIcanvasRect\fP Contents rectangle of the canvas 
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\fIfrom\fP Index of the first point to be painted 
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\fIto\fP Index of the last point to be painted\&. If to < 0 the curve will be painted to its last point\&. 
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.PP
Implemented in \fBQwtPlotTradingCurve\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotBarChart\fP, \fBQwtPlotSpectroCurve\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, and \fBQwtPlotCurve\fP\&.
.SS "Qt::Orientation QwtPlotSeriesItem::orientation () const"

.PP
\fBReturns\fP
.RS 4
Orientation of the plot item 
.RE
.PP
\fBSee also\fP
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\fBsetOrientation()\fP 
.RE
.PP

.SS "void QwtPlotSeriesItem::setOrientation (Qt::Orientation orientation)"
Set the orientation of the item\&.
.PP
The \fBorientation()\fP might be used in specific way by a plot item\&. F\&.e\&. a \fBQwtPlotCurve\fP uses it to identify how to display the curve int \fBQwtPlotCurve::Steps\fP or \fBQwtPlotCurve::Sticks\fP style\&.
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\fBSee also\fP
.RS 4
\fBorientation()\fP 
.RE
.PP

.SS "void QwtPlotSeriesItem::updateScaleDiv (const \fBQwtScaleDiv\fP & xScaleDiv, const \fBQwtScaleDiv\fP & yScaleDiv)\fC [virtual]\fP"

.PP
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 \fBQwtPlotGrid()\fP) have to reimplement \fBupdateScaleDiv()\fP
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\fBupdateScaleDiv()\fP is only called when the ScaleInterest interest is enabled\&. The default implementation does nothing\&.
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\fBParameters\fP
.RS 4
\fIxScaleDiv\fP Scale division of the x-axis 
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\fIyScaleDiv\fP Scale division of the y-axis
.RE
.PP
\fBSee also\fP
.RS 4
\fBQwtPlot::updateAxes()\fP, \fBScaleInterest\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotItem\fP\&.

.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.