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, and QwtPlotTradingCurve.

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

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

   Additional Inherited Members

Detailed Description

       Base class for plot items representing a series of samples.

Constructor & Destructor Documentation

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

       Parameters:
           title Title of the curve

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

       Parameters:
           title Title of the curve

Member Function Documentation

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

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

       Reimplemented from QwtPlotItem.

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

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

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

       Implements QwtPlotItem.

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

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

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

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

       See Also:
           setOrientation()

   void QwtPlotSeriesItem::setOrientation (Qt::Orientationorientation)
       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()

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

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

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

       See Also:
           QwtPlot::updateAxes(), ScaleInterest

       Reimplemented from QwtPlotItem.

Author

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