QwtPlotSeriesItem(3)           Qwt User's Guide           QwtPlotSeriesItem(3)

NAME
       QwtPlotSeriesItem - Base class for plot items representing a series of
       samples.


SYNOPSIS
       #include <qwt_plot_seriesitem.h>

       Inherits QwtPlotItem, and QwtAbstractSeriesStore.

       Inherited by QwtPlotAbstractBarChart, QwtPlotCurve, QwtPlotHistogram,
       QwtPlotIntervalCurve, QwtPlotSpectroCurve, QwtPlotTradingCurve, and
       QwtPlotVectorField.

   Public Member Functions
       QwtPlotSeriesItem (const QString &title=QString())
       QwtPlotSeriesItem (const QwtText &title)
       virtual ~QwtPlotSeriesItem ()
           Destructor.
       void setOrientation (Qt::Orientation)
       Qt::Orientation orientation () const
       virtual void draw (QPainter *, const QwtScaleMap &xMap, const
           QwtScaleMap &yMap, const QRectF &canvasRect) const override
           Draw the complete series.
       virtual void drawSeries (QPainter *painter, const QwtScaleMap &xMap,
           const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int
           to) const =0
       virtual QRectF boundingRect () const override
       virtual void updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
           override
           Update the item to changes of the axes scale division.

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

   Additional Inherited Members

Detailed Description
       Base class for plot items representing a series of samples.

       Definition at line 24 of file qwt_plot_seriesitem.h.

Constructor & Destructor Documentation
   QwtPlotSeriesItem::QwtPlotSeriesItem (const QString & title = QString())
       [explicit]
       Constructor

       Parameters
           title Title of the curve

       Definition at line 40 of file qwt_plot_seriesitem.cpp.

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

       Parameters
           title Title of the curve

       Definition at line 29 of file qwt_plot_seriesitem.cpp.

Member Function Documentation
   QRectF QwtPlotSeriesItem::boundingRect () const [override],  [virtual]
       Returns
           An invalid bounding rect: QRectF(1.0, 1.0, -2.0, -2.0)

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

       Reimplemented from QwtPlotItem.

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

       Definition at line 97 of file qwt_plot_seriesitem.cpp.

   void QwtPlotSeriesItem::draw (QPainter * painter, const QwtScaleMap & xMap,
       const QwtScaleMap & yMap, const QRectF & canvasRect) const [override],
       [virtual]
       Draw the complete series.

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

       Implements QwtPlotItem.

       Definition at line 90 of file qwt_plot_seriesitem.cpp.

   virtual void QwtPlotSeriesItem::drawSeries (QPainter * painter, const
       QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF &
       canvasRect, int from, int to) const [pure virtual]
       Draw a subset of the samples

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

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

   Qt::Orientation QwtPlotSeriesItem::orientation () const
       Returns
           Orientation of the plot item

       See also
           setOrientation()

       Definition at line 77 of file qwt_plot_seriesitem.cpp.

   void QwtPlotSeriesItem::setOrientation (Qt::Orientation orientation)
       Set the orientation of the item.

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

       See also
           orientation()

       Definition at line 62 of file qwt_plot_seriesitem.cpp.

   void QwtPlotSeriesItem::updateScaleDiv (const QwtScaleDiv & xScaleDiv,
       const QwtScaleDiv & yScaleDiv) [override],  [virtual]
       Update the item to changes of the axes scale division. Update the item,
       when the axes of plot have changed. The default implementation does
       nothing, but items that depend on the scale division (like
       QwtPlotGrid()) have to reimplement updateScaleDiv()

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

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

       See also
           QwtPlot::updateAxes(), ScaleInterest

       Reimplemented from QwtPlotItem.

       Definition at line 102 of file qwt_plot_seriesitem.cpp.


Author
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       code.

Version 6.2.0                   Sun Jul 18 2021           QwtPlotSeriesItem(3)