1099 lines
28 KiB
Groff
1099 lines
28 KiB
Groff
.TH "QwtPlotItem" 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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QwtPlotItem \- Base class for items on the plot canvas\&.
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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_item\&.h>\fP
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.PP
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Inherited by \fBQwtPlotGraphicItem\fP, \fBQwtPlotGrid\fP, \fBQwtPlotLegendItem\fP, \fBQwtPlotMarker\fP, \fBQwtPlotRasterItem\fP, \fBQwtPlotScaleItem\fP, \fBQwtPlotSeriesItem\fP, \fBQwtPlotShapeItem\fP, \fBQwtPlotTextLabel\fP, and \fBQwtPlotZoneItem\fP\&.
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.SS "Public Types"
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.in +1c
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.ti -1c
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.RI "enum \fBRttiValues\fP { \fBRtti_PlotItem\fP = 0, \fBRtti_PlotGrid\fP, \fBRtti_PlotScale\fP, \fBRtti_PlotLegend\fP, \fBRtti_PlotMarker\fP, \fBRtti_PlotCurve\fP, \fBRtti_PlotSpectroCurve\fP, \fBRtti_PlotIntervalCurve\fP, \fBRtti_PlotHistogram\fP, \fBRtti_PlotSpectrogram\fP, \fBRtti_PlotGraphic\fP, \fBRtti_PlotTradingCurve\fP, \fBRtti_PlotBarChart\fP, \fBRtti_PlotMultiBarChart\fP, \fBRtti_PlotShape\fP, \fBRtti_PlotTextLabel\fP, \fBRtti_PlotZone\fP, \fBRtti_PlotVectorField\fP, \fBRtti_PlotUserItem\fP = 1000 }"
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.br
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.RI "Runtime type information\&. "
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.ti -1c
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.RI "enum \fBItemAttribute\fP { \fBLegend\fP = 0x01, \fBAutoScale\fP = 0x02, \fBMargins\fP = 0x04 }"
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.br
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.RI "Plot Item Attributes\&. "
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.ti -1c
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.RI "enum \fBItemInterest\fP { \fBScaleInterest\fP = 0x01, \fBLegendInterest\fP = 0x02 }"
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.br
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.RI "Plot Item Interests\&. "
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.ti -1c
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.RI "enum \fBRenderHint\fP { \fBRenderAntialiased\fP = 0x1 }"
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.br
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.RI "Render hints\&. "
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.ti -1c
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.RI "typedef QFlags< \fBItemAttribute\fP > \fBItemAttributes\fP"
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.br
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.ti -1c
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.RI "typedef QFlags< \fBItemInterest\fP > \fBItemInterests\fP"
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.br
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.ti -1c
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.RI "typedef QFlags< \fBRenderHint\fP > \fBRenderHints\fP"
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.br
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.in -1c
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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 "\fBQwtPlotItem\fP ()"
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.br
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.ti -1c
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.RI "\fBQwtPlotItem\fP (const QString &\fBtitle\fP)"
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.br
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.ti -1c
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.RI "\fBQwtPlotItem\fP (const \fBQwtText\fP &\fBtitle\fP)"
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.br
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.ti -1c
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.RI "virtual \fB~QwtPlotItem\fP ()"
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.br
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.RI "Destroy the \fBQwtPlotItem\fP\&. "
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.ti -1c
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.RI "void \fBattach\fP (\fBQwtPlot\fP *\fBplot\fP)"
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.br
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.RI "Attach the item to a plot\&. "
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.ti -1c
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.RI "void \fBdetach\fP ()"
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.br
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.RI "This method detaches a \fBQwtPlotItem\fP from any \fBQwtPlot\fP it has been associated with\&. "
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.ti -1c
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.RI "\fBQwtPlot\fP * \fBplot\fP () const"
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.br
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.RI "Return attached plot\&. "
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.ti -1c
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.RI "void \fBsetTitle\fP (const QString &\fBtitle\fP)"
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.br
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.ti -1c
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.RI "void \fBsetTitle\fP (const \fBQwtText\fP &\fBtitle\fP)"
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.br
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.ti -1c
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.RI "const \fBQwtText\fP & \fBtitle\fP () const"
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.br
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.ti -1c
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.RI "virtual int \fBrtti\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetItemAttribute\fP (\fBItemAttribute\fP, bool on=true)"
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.br
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.ti -1c
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.RI "bool \fBtestItemAttribute\fP (\fBItemAttribute\fP) const"
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.br
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.ti -1c
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.RI "void \fBsetItemInterest\fP (\fBItemInterest\fP, bool on=true)"
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.br
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.ti -1c
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.RI "bool \fBtestItemInterest\fP (\fBItemInterest\fP) const"
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.br
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.ti -1c
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.RI "void \fBsetRenderHint\fP (\fBRenderHint\fP, bool on=true)"
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.br
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.ti -1c
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.RI "bool \fBtestRenderHint\fP (\fBRenderHint\fP) const"
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.br
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.ti -1c
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.RI "void \fBsetRenderThreadCount\fP (uint numThreads)"
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.br
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.ti -1c
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.RI "uint \fBrenderThreadCount\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetLegendIconSize\fP (const QSize &)"
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.br
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.ti -1c
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.RI "QSize \fBlegendIconSize\fP () const"
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.br
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.ti -1c
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.RI "double \fBz\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetZ\fP (double \fBz\fP)"
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.br
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.RI "Set the z value\&. "
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.ti -1c
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.RI "void \fBshow\fP ()"
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.br
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.RI "Show the item\&. "
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.ti -1c
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.RI "void \fBhide\fP ()"
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.br
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.RI "Hide the item\&. "
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.ti -1c
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.RI "virtual void \fBsetVisible\fP (bool)"
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.br
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.ti -1c
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.RI "bool \fBisVisible\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetAxes\fP (QwtAxisId \fBxAxis\fP, QwtAxisId \fByAxis\fP)"
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.br
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.ti -1c
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.RI "void \fBsetXAxis\fP (QwtAxisId)"
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.br
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.ti -1c
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.RI "QwtAxisId \fBxAxis\fP () const"
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.br
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.RI "Return xAxis\&. "
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.ti -1c
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.RI "void \fBsetYAxis\fP (QwtAxisId)"
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.br
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.ti -1c
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.RI "QwtAxisId \fByAxis\fP () const"
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.br
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.RI "Return yAxis\&. "
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.ti -1c
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.RI "virtual void \fBitemChanged\fP ()"
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.br
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.ti -1c
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.RI "virtual void \fBlegendChanged\fP ()"
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.br
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.ti -1c
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.RI "virtual void \fBdraw\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect) const =0"
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.br
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.RI "Draw the item\&. "
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.ti -1c
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.RI "virtual QRectF \fBboundingRect\fP () const"
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.br
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.ti -1c
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.RI "virtual void \fBgetCanvasMarginHint\fP (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const"
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.br
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.RI "Calculate a hint for the canvas margin\&. "
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.ti -1c
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.RI "virtual void \fBupdateScaleDiv\fP (const \fBQwtScaleDiv\fP &, const \fBQwtScaleDiv\fP &)"
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.br
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.RI "Update the item to changes of the axes scale division\&. "
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.ti -1c
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.RI "virtual void \fBupdateLegend\fP (const \fBQwtPlotItem\fP *, const \fBQList\fP< \fBQwtLegendData\fP > &)"
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.br
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.RI "Update the item to changes of the legend info\&. "
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.ti -1c
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.RI "QRectF \fBscaleRect\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &) const"
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.br
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.RI "Calculate the bounding scale rectangle of 2 maps\&. "
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.ti -1c
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.RI "QRectF \fBpaintRect\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &) const"
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.br
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.RI "Calculate the bounding paint rectangle of 2 maps\&. "
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.ti -1c
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.RI "virtual \fBQList\fP< \fBQwtLegendData\fP > \fBlegendData\fP () const"
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.br
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.RI "Return all information, that is needed to represent the item on the legend\&. "
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.ti -1c
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.RI "virtual \fBQwtGraphic\fP \fBlegendIcon\fP (int index, const QSizeF &) const"
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.br
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.in -1c
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.SS "Protected Member Functions"
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.in +1c
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.ti -1c
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.RI "\fBQwtGraphic\fP \fBdefaultIcon\fP (const QBrush &, const QSizeF &) const"
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.br
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.RI "Return a default icon from a brush\&. "
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.in -1c
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.SH "Detailed Description"
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.PP
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Base class for items on the plot canvas\&.
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A plot item is 'something', that can be painted on the plot canvas, or only affects the scales of the plot widget\&. They can be categorized as:
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.PP
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.IP "\(bu" 2
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Representator
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.br
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A 'Representator' is an item that represents some sort of data on the plot canvas\&. The different representator classes are organized according to the characteristics of the data:
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.IP " \(bu" 4
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\fBQwtPlotMarker\fP Represents a point or a horizontal/vertical coordinate
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.IP " \(bu" 4
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\fBQwtPlotCurve\fP Represents a series of points
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.IP " \(bu" 4
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\fBQwtPlotSpectrogram\fP ( \fBQwtPlotRasterItem\fP ) Represents raster data
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.IP " \(bu" 4
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\&.\&.\&.
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.PP
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.IP "\(bu" 2
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Decorators
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.br
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A 'Decorator' is an item, that displays additional information, that is not related to any data:
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.IP " \(bu" 4
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\fBQwtPlotGrid\fP
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.IP " \(bu" 4
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\fBQwtPlotScaleItem\fP
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.IP " \(bu" 4
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\fBQwtPlotSvgItem\fP
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.IP " \(bu" 4
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\&.\&.\&.
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.PP
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.PP
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.PP
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Depending on the \fBQwtPlotItem::ItemAttribute\fP flags, an item is included into autoscaling or has an entry on the legend\&.
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.PP
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Before misusing the existing item classes it might be better to implement a new type of plot item ( don't implement a watermark as spectrogram )\&. Deriving a new type of \fBQwtPlotItem\fP primarily means to implement the YourPlotItem::draw() method\&.
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.PP
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\fBSee also\fP
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.RS 4
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The cpuplot example shows the implementation of additional \fBplot\fP items\&.
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.RE
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.PP
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.PP
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Definition at line 66 of file qwt_plot_item\&.h\&.
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.SH "Member Typedef Documentation"
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.PP
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.SS "typedef QFlags<\fBItemAttribute\fP > \fBQwtPlotItem::ItemAttributes\fP"
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An ORed combination of \fBItemAttribute\fP values\&.
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.PP
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Definition at line 167 of file qwt_plot_item\&.h\&.
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.SS "typedef QFlags<\fBItemInterest\fP > \fBQwtPlotItem::ItemInterests\fP"
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An ORed combination of \fBItemInterest\fP values\&.
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.PP
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Definition at line 200 of file qwt_plot_item\&.h\&.
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.SS "typedef QFlags<\fBRenderHint\fP > \fBQwtPlotItem::RenderHints\fP"
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An ORed combination of \fBRenderHint\fP values\&.
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.PP
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Definition at line 209 of file qwt_plot_item\&.h\&.
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.SH "Member Enumeration Documentation"
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.PP
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.SS "enum \fBQwtPlotItem::ItemAttribute\fP"
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.PP
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Plot Item Attributes\&. Various aspects of a plot widget depend on the attributes of the attached plot items\&. If and how a single plot item participates in these updates depends on its attributes\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetItemAttribute()\fP, \fBtestItemAttribute()\fP, \fBItemInterest\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fILegend \fP\fP
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The item is represented on the legend\&.
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.TP
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\fB\fIAutoScale \fP\fP
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The \fBboundingRect()\fP of the item is included in the autoscaling calculation as long as its width or height is >= 0\&.0\&.
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.TP
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\fB\fIMargins \fP\fP
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The item needs extra space to display something outside its bounding rectangle\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBgetCanvasMarginHint()\fP
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.RE
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.PP
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.PP
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Definition at line 147 of file qwt_plot_item\&.h\&.
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.SS "enum \fBQwtPlotItem::ItemInterest\fP"
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.PP
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Plot Item Interests\&. Plot items might depend on the situation of the corresponding plot widget\&. By enabling an interest the plot item will be notified, when the corresponding attribute of the plot widgets has changed\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetItemAttribute()\fP, \fBtestItemAttribute()\fP, \fBItemInterest\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIScaleInterest \fP\fP
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The item is interested in updates of the scales
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.PP
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\fBSee also\fP
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.RS 4
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\fBupdateScaleDiv()\fP
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.RE
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.PP
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.TP
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\fB\fILegendInterest \fP\fP
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The item is interested in updates of the legend ( of other items ) This flag is intended for items, that want to implement a legend for displaying entries of other plot item\&.
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.PP
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\fBNote\fP
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.RS 4
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If the plot item wants to be represented on a legend enable \fBQwtPlotItem::Legend\fP instead\&.
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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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\fBupdateLegend()\fP
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.RE
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.PP
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.PP
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Definition at line 179 of file qwt_plot_item\&.h\&.
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.SS "enum \fBQwtPlotItem::RenderHint\fP"
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.PP
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Render hints\&.
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIRenderAntialiased \fP\fP
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Enable antialiasing\&.
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.PP
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Definition at line 203 of file qwt_plot_item\&.h\&.
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.SS "enum \fBQwtPlotItem::RttiValues\fP"
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.PP
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Runtime type information\&. RttiValues is used to cast plot items, without having to enable runtime type information of the compiler\&.
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIRtti_PlotItem \fP\fP
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Unspecific value, that can be used, when it doesn't matter\&.
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.TP
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\fB\fIRtti_PlotGrid \fP\fP
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For \fBQwtPlotGrid\fP\&.
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.TP
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\fB\fIRtti_PlotScale \fP\fP
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For \fBQwtPlotScaleItem\fP\&.
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.TP
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\fB\fIRtti_PlotLegend \fP\fP
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For \fBQwtPlotLegendItem\fP\&.
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.TP
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\fB\fIRtti_PlotMarker \fP\fP
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For \fBQwtPlotMarker\fP\&.
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.TP
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\fB\fIRtti_PlotCurve \fP\fP
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For \fBQwtPlotCurve\fP\&.
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.TP
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\fB\fIRtti_PlotSpectroCurve \fP\fP
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For \fBQwtPlotSpectroCurve\fP\&.
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.TP
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\fB\fIRtti_PlotIntervalCurve \fP\fP
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For \fBQwtPlotIntervalCurve\fP\&.
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.TP
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\fB\fIRtti_PlotHistogram \fP\fP
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For \fBQwtPlotHistogram\fP\&.
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.TP
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\fB\fIRtti_PlotSpectrogram \fP\fP
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For \fBQwtPlotSpectrogram\fP\&.
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.TP
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\fB\fIRtti_PlotGraphic \fP\fP
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For \fBQwtPlotGraphicItem\fP, \fBQwtPlotSvgItem\fP\&.
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.TP
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\fB\fIRtti_PlotTradingCurve \fP\fP
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For \fBQwtPlotTradingCurve\fP\&.
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.TP
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\fB\fIRtti_PlotBarChart \fP\fP
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For \fBQwtPlotBarChart\fP\&.
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.TP
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\fB\fIRtti_PlotMultiBarChart \fP\fP
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For \fBQwtPlotMultiBarChart\fP\&.
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.TP
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\fB\fIRtti_PlotShape \fP\fP
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For \fBQwtPlotShapeItem\fP\&.
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.TP
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\fB\fIRtti_PlotTextLabel \fP\fP
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For \fBQwtPlotTextLabel\fP\&.
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.TP
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\fB\fIRtti_PlotZone \fP\fP
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For \fBQwtPlotZoneItem\fP\&.
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.TP
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\fB\fIRtti_PlotVectorField \fP\fP
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For \fBQwtPlotVectorField\fP\&.
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.TP
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\fB\fIRtti_PlotUserItem \fP\fP
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Values >= Rtti_PlotUserItem are reserved for plot items not implemented in the Qwt library\&.
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.PP
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Definition at line 75 of file qwt_plot_item\&.h\&.
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.SH "Constructor & Destructor Documentation"
|
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.PP
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.SS "QwtPlotItem::QwtPlotItem ()\fC [explicit]\fP"
|
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Constructor
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.PP
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Definition at line 55 of file qwt_plot_item\&.cpp\&.
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.SS "QwtPlotItem::QwtPlotItem (const QString & 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 item
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Definition at line 64 of file qwt_plot_item\&.cpp\&.
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.SS "QwtPlotItem::QwtPlotItem (const \fBQwtText\fP & title)\fC [explicit]\fP"
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Constructor
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\fBParameters\fP
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\fItitle\fP Title of the item
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Definition at line 74 of file qwt_plot_item\&.cpp\&.
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.SH "Member Function Documentation"
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.SS "void QwtPlotItem::attach (\fBQwtPlot\fP * plot)"
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Attach the item to a plot\&. This method will attach a \fBQwtPlotItem\fP to the \fBQwtPlot\fP argument\&. It will first detach the \fBQwtPlotItem\fP from any plot from a previous call to attach (if necessary)\&. If a NULL argument is passed, it will detach from any \fBQwtPlot\fP it was attached to\&.
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\fBParameters\fP
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\fIplot\fP Plot widget
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\fBSee also\fP
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\fBdetach()\fP
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Definition at line 98 of file qwt_plot_item\&.cpp\&.
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.SS "QRectF QwtPlotItem::boundingRect () const\fC [virtual]\fP"
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\fBReturns\fP
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An invalid bounding rect: QRectF(1\&.0, 1\&.0, -2\&.0, -2\&.0)
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\fBNote\fP
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A width or height < 0\&.0 is ignored by the autoscaler
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Reimplemented in \fBQwtPlotZoneItem\fP, \fBQwtPlotVectorField\fP, \fBQwtPlotTradingCurve\fP, \fBQwtPlotShapeItem\fP, \fBQwtPlotSeriesItem\fP, \fBQwtPlotRasterItem\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotMarker\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotGraphicItem\fP, and \fBQwtPlotBarChart\fP\&.
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Definition at line 568 of file qwt_plot_item\&.cpp\&.
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.SS "\fBQwtGraphic\fP QwtPlotItem::defaultIcon (const QBrush & brush, const QSizeF & size) const\fC [protected]\fP"
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Return a default icon from a brush\&. The default icon is a filled rectangle used in several derived classes as \fBlegendIcon()\fP\&.
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\fBParameters\fP
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\fIbrush\fP Fill brush
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.br
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\fIsize\fP Icon size
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\fBReturns\fP
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A filled rectangle
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Definition at line 422 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::detach ()"
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.PP
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This method detaches a \fBQwtPlotItem\fP from any \fBQwtPlot\fP it has been associated with\&. \fBdetach()\fP is equivalent to calling attach( NULL )
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\fBSee also\fP
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\fBattach()\fP
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Definition at line 119 of file qwt_plot_item\&.cpp\&.
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.SS "virtual void QwtPlotItem::draw (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect) const\fC [pure virtual]\fP"
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Draw the item\&.
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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 rect of the canvas in painter coordinates
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Implemented in \fBQwtPlotSpectrogram\fP, \fBQwtPlotShapeItem\fP, \fBQwtPlotSeriesItem\fP, \fBQwtPlotScaleItem\fP, \fBQwtPlotRasterItem\fP, \fBQwtPlotLegendItem\fP, \fBQwtPlotGrid\fP, \fBQwtPlotGraphicItem\fP, \fBQwtPlotMarker\fP, \fBQwtPlotZoneItem\fP, and \fBQwtPlotTextLabel\fP\&.
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.SS "void QwtPlotItem::getCanvasMarginHint (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, double & left, double & top, double & right, double & bottom) const\fC [virtual]\fP"
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Calculate a hint for the canvas margin\&. When the \fBQwtPlotItem::Margins\fP flag is enabled the plot item indicates, that it needs some margins at the borders of the canvas\&. This is f\&.e\&. used by bar charts to reserve space for displaying the bars\&.
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The margins are in target device coordinates ( pixels on screen )
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\fBParameters\fP
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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 in painter coordinates
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.br
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\fIleft\fP Returns the left margin
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.br
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\fItop\fP Returns the top margin
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.br
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\fIright\fP Returns the right margin
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.br
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\fIbottom\fP Returns the bottom margin
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The default implementation returns 0 for all margins
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\fBSee also\fP
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\fBQwtPlot::getCanvasMarginsHint()\fP, \fBQwtPlot::updateCanvasMargins()\fP
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Reimplemented in \fBQwtPlotAbstractBarChart\fP\&.
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Definition at line 595 of file qwt_plot_item\&.cpp\&.
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.SS "bool QwtPlotItem::isVisible () const"
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\fBReturns\fP
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.RS 4
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true if visible
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\fBSee also\fP
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\fBsetVisible()\fP, \fBshow()\fP, \fBhide()\fP
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Definition at line 470 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::itemChanged ()\fC [virtual]\fP"
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Update the legend and call \fBQwtPlot::autoRefresh()\fP for the parent plot\&.
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.PP
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\fBSee also\fP
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.RS 4
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QwtPlot::legendChanged(), \fBQwtPlot::autoRefresh()\fP
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Definition at line 481 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::legendChanged ()\fC [virtual]\fP"
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Update the legend of the parent plot\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBQwtPlot::updateLegend()\fP, \fBitemChanged()\fP
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Definition at line 491 of file qwt_plot_item\&.cpp\&.
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.SS "\fBQList\fP< \fBQwtLegendData\fP > QwtPlotItem::legendData () const\fC [virtual]\fP"
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.PP
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Return all information, that is needed to represent the item on the legend\&. Most items are represented by one entry on the legend showing an icon and a text, but f\&.e\&. \fBQwtPlotMultiBarChart\fP displays one entry for each bar\&.
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\fBQwtLegendData\fP is basically a list of QVariants that makes it possible to overload and reimplement \fBlegendData()\fP to return almost any type of information, that is understood by the receiver that acts as the legend\&.
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The default implementation returns one entry with the \fBtitle()\fP of the item and the \fBlegendIcon()\fP\&.
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\fBReturns\fP
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.RS 4
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Data, that is needed to represent the item on the legend
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\fBSee also\fP
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\fBtitle()\fP, \fBlegendIcon()\fP, \fBQwtLegend\fP, \fBQwtPlotLegendItem\fP
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Reimplemented in \fBQwtPlotMultiBarChart\fP, and \fBQwtPlotBarChart\fP\&.
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Definition at line 626 of file qwt_plot_item\&.cpp\&.
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.SS "\fBQwtGraphic\fP QwtPlotItem::legendIcon (int index, const QSizeF & size) const\fC [virtual]\fP"
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.PP
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\fBReturns\fP
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.RS 4
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Icon representing the item on the legend
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The default implementation returns an invalid icon
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\fBParameters\fP
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\fIindex\fP Index of the legend entry ( usually there is only one )
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.br
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\fIsize\fP Icon size
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.RE
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\fBSee also\fP
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\fBsetLegendIconSize()\fP, \fBlegendData()\fP
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Reimplemented in \fBQwtPlotVectorField\fP, \fBQwtPlotTradingCurve\fP, \fBQwtPlotShapeItem\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotMarker\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotCurve\fP, and \fBQwtPlotBarChart\fP\&.
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Definition at line 402 of file qwt_plot_item\&.cpp\&.
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.SS "QSize QwtPlotItem::legendIconSize () const"
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\fBReturns\fP
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Legend icon size
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\fBSee also\fP
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\fBsetLegendIconSize()\fP, \fBlegendIcon()\fP
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Definition at line 386 of file qwt_plot_item\&.cpp\&.
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.SS "QRectF QwtPlotItem::paintRect (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap) const"
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.PP
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Calculate the bounding paint rectangle of 2 maps\&.
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\fBParameters\fP
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.RS 4
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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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.RE
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\fBReturns\fP
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.RS 4
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Bounding paint rectangle of the scale maps, not normalized
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Definition at line 720 of file qwt_plot_item\&.cpp\&.
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.SS "uint QwtPlotItem::renderThreadCount () const"
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.PP
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\fBReturns\fP
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.RS 4
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Number of threads to be used for rendering\&. If numThreads() is set to 0, the system specific ideal thread count is used\&.
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Definition at line 360 of file qwt_plot_item\&.cpp\&.
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.SS "int QwtPlotItem::rtti () const\fC [virtual]\fP"
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Return rtti for the specific class represented\&. \fBQwtPlotItem\fP is simply a virtual interface class, and base classes will implement this method with specific rtti values so a user can differentiate them\&.
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The rtti value is useful for environments, where the runtime type information is disabled and it is not possible to do a dynamic_cast<\&.\&.\&.>\&.
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\fBReturns\fP
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.RS 4
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rtti value
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.RE
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\fBSee also\fP
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.RS 4
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\fBRttiValues\fP
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.PP
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Reimplemented in \fBQwtPlotZoneItem\fP, \fBQwtPlotVectorField\fP, \fBQwtPlotTradingCurve\fP, \fBQwtPlotTextLabel\fP, \fBQwtPlotSpectrogram\fP, \fBQwtPlotSpectroCurve\fP, \fBQwtPlotShapeItem\fP, \fBQwtPlotScaleItem\fP, \fBQwtPlotMultiBarChart\fP, \fBQwtPlotMarker\fP, \fBQwtPlotLegendItem\fP, \fBQwtPlotIntervalCurve\fP, \fBQwtPlotHistogram\fP, \fBQwtPlotGrid\fP, \fBQwtPlotGraphicItem\fP, \fBQwtPlotCurve\fP, and \fBQwtPlotBarChart\fP\&.
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.PP
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Definition at line 136 of file qwt_plot_item\&.cpp\&.
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.SS "QRectF QwtPlotItem::scaleRect (const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap) const"
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.PP
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Calculate the bounding scale rectangle of 2 maps\&.
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.PP
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\fBParameters\fP
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.RS 4
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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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.RE
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\fBReturns\fP
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.RS 4
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Bounding scale rect of the scale maps, not normalized
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Definition at line 705 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId)"
|
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Set X and Y axis
|
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.PP
|
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The item will painted according to the coordinates of its Axes\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIxAxisId\fP X Axis
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.br
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\fIyAxisId\fP Y Axis
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.RE
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\fBSee also\fP
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.RS 4
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\fBsetXAxis()\fP, \fBsetYAxis()\fP, \fBxAxis()\fP, \fByAxis()\fP
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Definition at line 507 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setItemAttribute (\fBItemAttribute\fP attribute, bool on = \fCtrue\fP)"
|
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Toggle an item attribute
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.PP
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\fBParameters\fP
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.RS 4
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\fIattribute\fP Attribute type
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.br
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\fIon\fP true/false
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.RE
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\fBSee also\fP
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.RS 4
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\fBtestItemAttribute()\fP, \fBItemInterest\fP
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Definition at line 228 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setItemInterest (\fBItemInterest\fP interest, bool on = \fCtrue\fP)"
|
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Toggle an item interest
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.PP
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\fBParameters\fP
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.RS 4
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\fIinterest\fP Interest type
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.br
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\fIon\fP true/false
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.RE
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\fBSee also\fP
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.RS 4
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\fBtestItemInterest()\fP, \fBItemAttribute\fP
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Definition at line 279 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setLegendIconSize (const QSize & size)"
|
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Set the size of the legend icon
|
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.PP
|
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The default setting is 8x8 pixels
|
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.PP
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\fBParameters\fP
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.RS 4
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\fIsize\fP Size
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.RE
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\fBSee also\fP
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.RS 4
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\fBlegendIconSize()\fP, \fBlegendIcon()\fP
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Definition at line 373 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setRenderHint (\fBRenderHint\fP hint, bool on = \fCtrue\fP)"
|
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Toggle an render hint
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.PP
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\fBParameters\fP
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.RS 4
|
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\fIhint\fP Render hint
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.br
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\fIon\fP true/false
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.RE
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\fBSee also\fP
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.RS 4
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\fBtestRenderHint()\fP, \fBRenderHint\fP
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Definition at line 312 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setRenderThreadCount (uint numThreads)"
|
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On multi core systems rendering of certain plot item ( f\&.e \fBQwtPlotRasterItem\fP ) can be done in parallel in several threads\&.
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.PP
|
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The default setting is set to 1\&.
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.PP
|
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\fBParameters\fP
|
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.RS 4
|
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\fInumThreads\fP Number of threads to be used for rendering\&. If numThreads is set to 0, the system specific ideal thread count is used\&.
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.RE
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The default thread count is 1 ( = no additional threads )
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.PP
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Definition at line 350 of file qwt_plot_item\&.cpp\&.
|
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.SS "void QwtPlotItem::setTitle (const QString & title)"
|
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Set a new title
|
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.PP
|
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\fBParameters\fP
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.RS 4
|
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\fItitle\fP Title
|
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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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\fBtitle()\fP
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.RE
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Definition at line 187 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setTitle (const \fBQwtText\fP & title)"
|
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Set a new title
|
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.PP
|
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\fBParameters\fP
|
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.RS 4
|
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\fItitle\fP Title
|
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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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\fBtitle()\fP
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.RE
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.PP
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Definition at line 198 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setVisible (bool on)\fC [virtual]\fP"
|
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Show/Hide the item
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.PP
|
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\fBParameters\fP
|
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.RS 4
|
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\fIon\fP Show if true, otherwise hide
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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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\fBisVisible()\fP, \fBshow()\fP, \fBhide()\fP
|
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.RE
|
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.PP
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.PP
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Definition at line 457 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setXAxis (QwtAxisId axisId)"
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Set the X axis
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.PP
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The item will painted according to the coordinates its Axes\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP X 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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\fBsetAxes()\fP, \fBsetYAxis()\fP, \fBxAxis()\fP
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.RE
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.PP
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.PP
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Definition at line 526 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setYAxis (QwtAxisId axisId)"
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Set the Y axis
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.PP
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The item will painted according to the coordinates its Axes\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP 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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\fBsetAxes()\fP, \fBsetXAxis()\fP, \fByAxis()\fP
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.RE
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.PP
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.PP
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Definition at line 543 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::setZ (double z)"
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.PP
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Set the z value\&. Plot items are painted in increasing z-order\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIz\fP Z-value
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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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\fBz()\fP, \fBQwtPlotDict::itemList()\fP
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.RE
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.PP
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.PP
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Definition at line 165 of file qwt_plot_item\&.cpp\&.
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.SS "bool QwtPlotItem::testItemAttribute (\fBItemAttribute\fP attribute) const"
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Test an item attribute
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.PP
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\fBParameters\fP
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.RS 4
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\fIattribute\fP Attribute type
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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true/false
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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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\fBsetItemAttribute()\fP, \fBItemInterest\fP
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.RE
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.PP
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.PP
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Definition at line 266 of file qwt_plot_item\&.cpp\&.
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.SS "bool QwtPlotItem::testItemInterest (\fBItemInterest\fP interest) const"
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Test an item interest
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.PP
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\fBParameters\fP
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.RS 4
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\fIinterest\fP Interest type
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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true/false
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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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\fBsetItemInterest()\fP, \fBItemAttribute\fP
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.RE
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.PP
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.PP
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Definition at line 299 of file qwt_plot_item\&.cpp\&.
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.SS "bool QwtPlotItem::testRenderHint (\fBRenderHint\fP hint) const"
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Test a render hint
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.PP
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\fBParameters\fP
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.RS 4
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\fIhint\fP Render hint
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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true/false
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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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\fBsetRenderHint()\fP, \fBRenderHint\fP
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.RE
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.PP
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.PP
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Definition at line 332 of file qwt_plot_item\&.cpp\&.
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.SS "const \fBQwtText\fP & QwtPlotItem::title () const"
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.PP
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\fBReturns\fP
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.RS 4
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Title of the 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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\fBsetTitle()\fP
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.RE
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.PP
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.PP
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Definition at line 215 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::updateLegend (const \fBQwtPlotItem\fP * item, const \fBQList\fP< \fBQwtLegendData\fP > & data)\fC [virtual]\fP"
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.PP
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Update the item to changes of the legend info\&. Plot items that want to display a legend ( not those, that want to be displayed on a legend ! ) will have to implement \fBupdateLegend()\fP\&.
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.PP
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\fBupdateLegend()\fP is only called when the LegendInterest 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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\fIitem\fP Plot item to be displayed on a legend
|
|
.br
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\fIdata\fP Attributes how to display item on the legend
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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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\fBQwtPlotLegendItem\fP
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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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Plot items, that want to be displayed on a legend need to enable the \fBQwtPlotItem::Legend\fP flag and to implement \fBlegendData()\fP and \fBlegendIcon()\fP
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.RE
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.PP
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.PP
|
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Reimplemented in \fBQwtPlotLegendItem\fP\&.
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.PP
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Definition at line 690 of file qwt_plot_item\&.cpp\&.
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.SS "void QwtPlotItem::updateScaleDiv (const \fBQwtScaleDiv\fP & xScaleDiv, const \fBQwtScaleDiv\fP & yScaleDiv)\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
|
|
\fBupdateScaleDiv()\fP is only called when the ScaleInterest interest is enabled\&. The default implementation does nothing\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIxScaleDiv\fP Scale division of the x-axis
|
|
.br
|
|
\fIyScaleDiv\fP Scale division of the y-axis
|
|
.RE
|
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.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBQwtPlot::updateAxes()\fP, \fBScaleInterest\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Reimplemented in \fBQwtPlotGrid\fP, \fBQwtPlotSeriesItem\fP, and \fBQwtPlotScaleItem\fP\&.
|
|
.PP
|
|
Definition at line 665 of file qwt_plot_item\&.cpp\&.
|
|
.SS "double QwtPlotItem::z () const"
|
|
Plot items are painted in increasing z-order\&.
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
\fBsetZ()\fP, \fBQwtPlotDict::itemList()\fP
|
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.RE
|
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.PP
|
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.PP
|
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Definition at line 152 of file qwt_plot_item\&.cpp\&.
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.SH "Author"
|
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.PP
|
|
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.
|