209 lines
6.0 KiB
Groff
209 lines
6.0 KiB
Groff
.TH "QwtPlotSeriesItem" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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QwtPlotSeriesItem \- Base class for plot items representing a series of samples\&.
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.SH SYNOPSIS
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.br
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.PP
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.PP
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\fC#include <qwt_plot_seriesitem\&.h>\fP
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.PP
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Inherits \fBQwtPlotItem\fP, and \fBQwtAbstractSeriesStore\fP\&.
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.PP
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Inherited by \fBQwtPlotAbstractBarChart\fP, \fBQwtPlotCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotSpectroCurve\fP, \fBQwtPlotTradingCurve\fP, and \fBQwtPlotVectorField\fP\&.
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.SS "Public Member Functions"
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.in +1c
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.ti -1c
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.RI "\fBQwtPlotSeriesItem\fP (const QString &\fBtitle\fP=QString())"
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.br
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.RI "\fBQwtPlotSeriesItem\fP (const \fBQwtText\fP &\fBtitle\fP)"
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.br
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.ti -1c
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.RI "virtual \fB~QwtPlotSeriesItem\fP ()"
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.br
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.RI "Destructor\&. "
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.ti -1c
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.RI "void \fBsetOrientation\fP (Qt::Orientation)"
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.br
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.RI "Qt::Orientation \fBorientation\fP () const"
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.br
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.ti -1c
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.RI "virtual void \fBdraw\fP (QPainter *, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect) const override"
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.br
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.RI "Draw the complete series\&. "
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.ti -1c
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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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.br
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.ti -1c
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.RI "virtual QRectF \fBboundingRect\fP () const override"
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.br
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.ti -1c
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.RI "virtual void \fBupdateScaleDiv\fP (const \fBQwtScaleDiv\fP &, const \fBQwtScaleDiv\fP &) override"
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.br
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.RI "Update the item to changes of the axes scale division\&. "
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.in -1c
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.SS "Protected Member Functions"
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.RI "virtual void \fBdataChanged\fP () override"
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.br
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.RI "\fBdataChanged()\fP indicates, that the series has been changed\&. "
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.in -1c
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.SS "Additional Inherited Members"
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.SH "Detailed Description"
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.PP
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Base class for plot items representing a series of samples\&.
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.PP
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Definition at line 24 of file qwt_plot_seriesitem\&.h\&.
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.SH "Constructor & Destructor Documentation"
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.PP
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.SS "QwtPlotSeriesItem::QwtPlotSeriesItem (const QString & title = \fCQString()\fP)\fC [explicit]\fP"
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Constructor
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.PP
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\fBParameters\fP
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.RS 4
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\fItitle\fP Title of the curve
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.RE
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.PP
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.PP
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Definition at line 40 of file qwt_plot_seriesitem\&.cpp\&.
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.SS "QwtPlotSeriesItem::QwtPlotSeriesItem (const \fBQwtText\fP & title)\fC [explicit]\fP"
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Constructor
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.PP
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\fBParameters\fP
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.RS 4
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\fItitle\fP Title of the curve
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.RE
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.PP
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.PP
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Definition at line 29 of file qwt_plot_seriesitem\&.cpp\&.
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.SH "Member Function Documentation"
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.PP
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.SS "QRectF QwtPlotSeriesItem::boundingRect () const\fC [override]\fP, \fC [virtual]\fP"
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.PP
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\fBReturns\fP
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.RS 4
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An invalid bounding rect: QRectF(1\&.0, 1\&.0, -2\&.0, -2\&.0)
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.RE
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.PP
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\fBNote\fP
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.RS 4
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A width or height < 0\&.0 is ignored by the autoscaler
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.RE
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.PP
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.PP
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Reimplemented from \fBQwtPlotItem\fP\&.
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.PP
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Reimplemented in \fBQwtPlotVectorField\fP, \fBQwtPlotTradingCurve\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, and \fBQwtPlotBarChart\fP\&.
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.PP
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Definition at line 97 of file qwt_plot_seriesitem\&.cpp\&.
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.SS "void QwtPlotSeriesItem::draw (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect) const\fC [override]\fP, \fC [virtual]\fP"
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.PP
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Draw the complete series\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIpainter\fP Painter
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.br
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\fIxMap\fP Maps x-values into pixel coordinates\&.
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.br
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\fIyMap\fP Maps y-values into pixel coordinates\&.
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.br
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\fIcanvasRect\fP Contents rectangle of the canvas
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.RE
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.PP
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.PP
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Implements \fBQwtPlotItem\fP\&.
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.PP
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Definition at line 90 of file qwt_plot_seriesitem\&.cpp\&.
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.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"
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Draw a subset of the samples
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.PP
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\fBParameters\fP
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.RS 4
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\fIpainter\fP Painter
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.br
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\fIxMap\fP Maps x-values into pixel coordinates\&.
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.br
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\fIyMap\fP Maps y-values into pixel coordinates\&.
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.br
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\fIcanvasRect\fP Contents rectangle of the canvas
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.br
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\fIfrom\fP Index of the first point to be painted
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.br
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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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.RE
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.PP
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.PP
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Implemented in \fBQwtPlotVectorField\fP, \fBQwtPlotTradingCurve\fP, \fBQwtPlotSpectroCurve\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotCurve\fP, and \fBQwtPlotBarChart\fP\&.
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.SS "Qt::Orientation QwtPlotSeriesItem::orientation () const"
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.PP
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\fBReturns\fP
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.RS 4
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Orientation of the plot item
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetOrientation()\fP
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.RE
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.PP
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.PP
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Definition at line 77 of file qwt_plot_seriesitem\&.cpp\&.
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.SS "void QwtPlotSeriesItem::setOrientation (Qt::Orientation orientation)"
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Set the orientation of the item\&.
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.PP
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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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.PP
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\fBSee also\fP
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.RS 4
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\fBorientation()\fP
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.RE
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.PP
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.PP
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Definition at line 62 of file qwt_plot_seriesitem\&.cpp\&.
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.SS "void QwtPlotSeriesItem::updateScaleDiv (const \fBQwtScaleDiv\fP & xScaleDiv, const \fBQwtScaleDiv\fP & yScaleDiv)\fC [override]\fP, \fC [virtual]\fP"
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.PP
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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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.PP
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\fBupdateScaleDiv()\fP is only called when the ScaleInterest interest is enabled\&. The default implementation does nothing\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIxScaleDiv\fP Scale division of the x-axis
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.br
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\fIyScaleDiv\fP Scale division of the y-axis
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBQwtPlot::updateAxes()\fP, \fBScaleInterest\fP
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.RE
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.PP
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.PP
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Reimplemented from \fBQwtPlotItem\fP\&.
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.PP
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Definition at line 102 of file qwt_plot_seriesitem\&.cpp\&.
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.SH "Author"
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.PP
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.
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