QwtPlot - A 2-D plotting widget.

       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.1.4                                    Wed Jan 2 2019                                       QwtPlot(3)

QwtPlot::QwtPlot(QWidget*parent=NULL)[explicit]
       Constructor.

       Parameters:parent Parent widget

   QwtPlot::QwtPlot(constQwtText&title,QWidget*parent=NULL)[explicit]
       Constructor.

       Parameters:title Title text
           parent Parent widget

       A 2-D plotting widget.

       QwtPlot is a widget for plotting two-dimensional graphs. An unlimited number of plot items can be
       displayed on its canvas. Plot items might be curves (QwtPlotCurve), markers (QwtPlotMarker), the grid
       (QwtPlotGrid), or anything else derived from QwtPlotItem. A plot can have up to four axes, with each plot
       item attached to an x- and a y axis. The scales at the axes can be explicitly set (QwtScaleDiv), or are
       calculated from the plot items, using algorithms (QwtScaleEngine) which can be configured separately for
       each axis.

       The simpleplot example is a good starting point to see how to set up a plot widget.

       Example
           The following example shows (schematically) the most simple way to use QwtPlot. By default, only the
           left and bottom axes are visible and their scales are computed automatically.

           #include <qwt_plot.h>
           #include <qwt_plot_curve.h>

           QwtPlot *myPlot = new QwtPlot( "Two Curves", parent );

           // add curves
           QwtPlotCurve *curve1 = new QwtPlotCurve( "Curve 1" );
           QwtPlotCurve *curve2 = new QwtPlotCurve( "Curve 2" );

           // connect or copy the data to the curves
           curve1->setData( ... );
           curve2->setData( ... );

           curve1->attach( myPlot );
           curve2->attach( myPlot );

           // finally, refresh the plot
           myPlot->replot();

enumQwtPlot::Axis
       Axis index.

       EnumeratoryLeft  Y axis left of the canvas.

       yRight Y axis right of the canvas.

       xBottom
              X axis below the canvas.

       xTop   X axis above the canvas.

       axisCnt
              Number of axes.

   enumQwtPlot::LegendPosition
       Position of the legend, relative to the canvas.

       Seealso:insertLegend()EnumeratorLeftLegend
              The legend will be left from the QwtPlot::yLeft axis.

       RightLegend
              The legend will be right from the QwtPlot::yRight axis.

       BottomLegend
              The legend will be below the footer.

       TopLegend
              The legend will be above the title.

voidQwtPlot::applyProperties(constQString&)
       This  method  is  intended  for  manipulating  the plot widget from a specific editor in the Qwt designer
       plugin.

       Warning:
           The plot editor has never been implemented.

   boolQwtPlot::autoReplot()constReturns:
           true if the autoReplot option is set.

       Seealso:setAutoReplot()boolQwtPlot::axisAutoScale(intaxisId)constReturns:
           True, if autoscaling is enabled

       Parameters:axisId Axis index

   boolQwtPlot::axisEnabled(intaxisId)constReturns:
           True, if a specified axis is enabled

       Parameters:axisId Axis index

   QFontQwtPlot::axisFont(intaxisId)constReturns:
           The font of the scale labels for a specified axis

       Parameters:axisId Axis index

   QwtIntervalQwtPlot::axisInterval(intaxisId)const
       Return the current interval of the specified axis. This is only a convenience function for  axisScaleDiv(
       axisId )->interval();

       Parameters:axisId Axis index

       Returns:
           Scale interval

       Seealso:QwtScaleDiv, axisScaleDiv()intQwtPlot::axisMaxMajor(intaxisId)constReturns:
           The maximum number of major ticks for a specified axis

       Parameters:axisId Axis index

       Seealso:setAxisMaxMajor(), QwtScaleEngine::divideScale()intQwtPlot::axisMaxMinor(intaxisId)constReturns:
           the maximum number of minor ticks for a specified axis

       Parameters:axisId Axis index

       Seealso:setAxisMaxMinor(), QwtScaleEngine::divideScale()constQwtScaleDiv&QwtPlot::axisScaleDiv(intaxisId)const
       Return    the    scale    division    of    a    specified    axis.    axisScaleDiv(axisId).lowerBound(),
       axisScaleDiv(axisId).upperBound() are the current limits of the axis scale.

       Parameters:axisId Axis index

       Returns:
           Scale division

       Seealso:QwtScaleDiv, setAxisScaleDiv(), QwtScaleEngine::divideScale()constQwtScaleDraw*QwtPlot::axisScaleDraw(intaxisId)const
       Return the scale draw of a specified axis.

       Parameters:axisId Axis index

       Returns:
           Specified scaleDraw for axis, or NULL if axis is invalid.

   QwtScaleDraw*QwtPlot::axisScaleDraw(intaxisId)
       Return the scale draw of a specified axis.

       Parameters:axisId Axis index

       Returns:
           Specified scaleDraw for axis, or NULL if axis is invalid.

   QwtScaleEngine*QwtPlot::axisScaleEngine(intaxisId)Parameters:axisId Axis index

       Returns:
           Scale engine for a specific axis

   constQwtScaleEngine*QwtPlot::axisScaleEngine(intaxisId)constParameters:axisId Axis index

       Returns:
           Scale engine for a specific axis

   doubleQwtPlot::axisStepSize(intaxisId)const
       Return the step size parameter that has been set in setAxisScale. This doesn't need to be the  step  size
       of the current scale.

       Parameters:axisId Axis index

       Returns:
           step size parameter value

       Seealso:setAxisScale(), QwtScaleEngine::divideScale()QwtTextQwtPlot::axisTitle(intaxisId)constReturns:
           Title of a specified axis

       Parameters:axisId Axis index

   boolQwtPlot::axisValid(intaxisId)[static],[protected]Returns:
           true if the specified axis exists, otherwise false

       Parameters:axisId axis index

   constQwtScaleWidget*QwtPlot::axisWidget(intaxisId)constReturns:
           Scale widget of the specified axis, or NULL if axisId is invalid.

       Parameters:axisId Axis index

   QwtScaleWidget*QwtPlot::axisWidget(intaxisId)Returns:
           Scale widget of the specified axis, or NULL if axisId is invalid.

       Parameters:axisId Axis index

   QWidget*QwtPlot::canvas()Returns:
           the plot's canvas

   constQWidget*QwtPlot::canvas()constReturns:
           the plot's canvas

   QBrushQwtPlot::canvasBackground()const
       Nothing else than: canvas()->palette().brush( QPalette::Normal, QPalette::Window);

       Returns:
           Background brush of the plotting area.

       Seealso:setCanvasBackground()QwtScaleMapQwtPlot::canvasMap(intaxisId)const[virtual]Parameters:axisId Axis

       Returns:
           Map  for  the  axis on the canvas. With this map pixel coordinates can translated to plot coordinates
           and vice versa.

       Seealso:QwtScaleMap, transform(), invTransform()voidQwtPlot::drawCanvas(QPainter*painter)[virtual]
       Redraw the canvas.

       Parameters:painter Painter used for drawing

       Warning:
           drawCanvas calls drawItems what is also used for printing. Applications that like to  add  individual
           plot items better overload drawItems()Seealso:drawItems()voidQwtPlot::drawItems(QPainter*painter,constQRectF&canvasRect,constQwtScaleMapmaps[axisCnt])const[virtual]
       Redraw the canvas items.

       Parameters:painter Painter used for drawing
           canvasRect Bounding rectangle where to paint
           mapsQwtPlot::axisCnt maps, mapping between plot and paint device coordinates

       Note:
           Usually canvasRect is contentsRect() of the plot canvas. Due to a bug in Qt this rectangle  might  be
           wrong  for  certain  frame  styles  (  f.e QFrame::Box ) and it might be necessary to fix the margins
           manually using QWidget::setContentsMargins()

   voidQwtPlot::enableAxis(intaxisId,booltf=true)
       Enable or disable a specified axis. When an axis is disabled, this only means that it is not  visible  on
       the  screen.  Curves,  markers  and  can  be  attached  to  disabled  axes,  and transformation of screen
       coordinates into values works as normal.

       Only xBottom and yLeft are enabled by default.

       Parameters:axisId Axis index
           tf true (enabled) or false (disabled)

   boolQwtPlot::event(QEvent*event)[virtual]
       Adds handling of layout requests.

       Parameters:event Event

       Returns:
           See QFrame::event()

   boolQwtPlot::eventFilter(QObject*object,QEvent*event)[virtual]
       Event filter. The plot handles the following events for the canvas:

       • QEvent::Resize The canvas margins might depend on its size

       • QEvent::ContentsRectChange The layout needs to be recalculated

       Parameters:object Object to be filtered
           event Event

       Returns:
           See QFrame::eventFilter()

       Seealso:updateCanvasMargins(), updateLayout()QwtTextQwtPlot::footer()constReturns:
           Text of the footer

   QwtTextLabel*QwtPlot::footerLabel()Returns:
           Footer label widget.

   constQwtTextLabel*QwtPlot::footerLabel()constReturns:
           Footer label widget.

   voidQwtPlot::getCanvasMarginsHint(constQwtScaleMapmaps[],constQRectF&canvasRect,double&left,double&top,double&right,double&bottom)const[virtual]
       Calculate the canvas margins.

       Parameters:mapsQwtPlot::axisCnt maps, mapping between plot and paint device coordinates
           canvasRect Bounding rectangle where to paint
           left Return parameter for the left margin
           top Return parameter for the top margin
           right Return parameter for the right margin
           bottom Return parameter for the bottom margin

       Plot  items  might  indicate,  that  they  need  some  extra  space  at  the borders of the canvas by the
       QwtPlotItem::Margins flag.

       updateCanvasMargins(), QwtPlotItem::getCanvasMarginHint()QStringQwtPlot::grabProperties()const
       This method is intended for manipulating the plot widget from a  specific  editor  in  the  Qwt  designer
       plugin.

       Returns:
           QString()

       Warning:
           The plot editor has never been implemented.

   QwtPlotItem*QwtPlot::infoToItem(constQVariant&itemInfo)const[virtual]
       Identify  the  plot  item according to an item info object, that has bee generated from itemToInfo(). The
       default implementation simply tries to unwrap a QwtPlotItem pointer:

       if ( itemInfo.canConvert<QwtPlotItem *>() )
           return qvariant_cast<QwtPlotItem *>( itemInfo );

       Parameters:itemInfo Plot item

       Returns:
           A plot item, when successful, otherwise a NULL pointer.

       Seealso:itemToInfo()voidQwtPlot::insertLegend(QwtAbstractLegend*legend,QwtPlot::LegendPositionpos=QwtPlot::RightLegend,doubleratio=-1.0)
       Insert a legend. If the position legend is QwtPlot::LeftLegendorQwtPlot::RightLegendthelegendwillbeorganizedinonecolumnfromtoptodown.Otherwisethelegenditemswillbeplacedinatablewithabestfitnumberofcolumnsfromlefttoright.insertLegend() will set the plot widget as parent for the legend. The  legend  will  be  deleted  in  the
       destructor of the plot or when another legend is inserted.

       Legends,   that  are  not  inserted  into  the  layout  of  the  plot  widget  need  to  connect  to  the
       legendDataChanged() signal. Calling updateLegend() initiates this signal for an initial update. When  the
       application  code  wants  to implement its own layout this also needs to be done for rendering plots to a
       document ( see QwtPlotRenderer ).

       Parameters:legend Legend
           pos The legend's position. For top/left position  the  number  of  columns  will  be  limited  to  1,
           otherwise it will be set to unlimited.
           ratio  Ratio  between legend and the bounding rectangle of title, canvas and axes. The legend will be
           shrunk if it would need more space than the given ratio. The ratio is limited to  ]0.0  ..  1.0].  In
           case  of  <=  0.0  it  will  be  reset to the default ratio. The default vertical/horizontal ratio is
           0.33/0.5.

       Seealso:legend(), QwtPlotLayout::legendPosition(), QwtPlotLayout::setLegendPosition()doubleQwtPlot::invTransform(intaxisId,intpos)const
       Transform the x or y coordinate of a position in the drawing region into a value.

       Parameters:axisId Axis index
           pos position

       Returns:
           Position as axis coordinate

       Warning:
           The position can be an x or a y coordinate, depending on the specified axis.

   voidQwtPlot::itemAttached(QwtPlotItem*plotItem,boolon)[signal]
       A signal indicating, that an item has been attached/detached

       Parameters:plotItem Plot item
           on Attached/Detached

   QVariantQwtPlot::itemToInfo(QwtPlotItem*plotItem)const[virtual]
       Build an information, that can be used to identify a plot item on the legend. The default  implementation
       simply  wraps  the  plot  item into a QVariant object. When overloading itemToInfo() usually infoToItem()
       needs to reimplemeted too.

       QVariant itemInfo;
       qVariantSetValue( itemInfo, plotItem );

       Parameters:plotItem Plot item

       Returns:
           Plot item embedded in a QVariant

       Seealso:infoToItem()QwtAbstractLegend*QwtPlot::legend()Returns:
           the plot's legend

       Seealso:insertLegend()constQwtAbstractLegend*QwtPlot::legend()constReturns:
           the plot's legend

       Seealso:insertLegend()voidQwtPlot::legendDataChanged(constQVariant&itemInfo,constQList<QwtLegendData>&data)[signal]
       A signal with the attributes how to update the legend entries for a plot item.

       Parameters:itemInfo Info about a plot item, build from itemToInfo()data Attributes of the entries ( usually <= 1 ) for the plot item.

       Seealso:itemToInfo(), infoToItem(), QwtAbstractLegend::updateLegend()QwtPlotLayout*QwtPlot::plotLayout()Returns:
           the plot's layout

   constQwtPlotLayout*QwtPlot::plotLayout()constReturns:
           the plot's layout

   voidQwtPlot::replot()[virtual],[slot]
       Redraw the plot. If the autoReplot option is not set (which is the default) or if any curves are attached
       to raw data, the plot has to be refreshed explicitly in order to make changes visible.

       Seealso:updateAxes(), setAutoReplot()voidQwtPlot::resizeEvent(QResizeEvent*e)[protected],[virtual]
       Resize and update internal layout

       Parameters:e Resize event

   voidQwtPlot::setAutoReplot(booltf=true)
       Set or reset the autoReplot option. If the autoReplot option is set, the plot will be updated  implicitly
       by  manipulating  member  functions.  Since  this  may be time-consuming, it is recommended to leave this
       option switched off and call replot() explicitly if necessary.

       The autoReplot option is set to false by default, which means that the user has to call replot() in order
       to make changes visible.

       Parameters:tf true or false. Defaults to true.

       Seealso:replot()voidQwtPlot::setAxisAutoScale(intaxisId,boolon=true)
       Enable autoscaling for a specified axis. This member function is used to switch back to autoscaling  mode
       after a fixed scale has been set. Autoscaling is enabled by default.

       Parameters:axisId Axis index
           on On/Off

       Seealso:setAxisScale(), setAxisScaleDiv(), updateAxes()Note:
           The autoscaling flag has no effect until updateAxes() is executed ( called by replot() ).

   voidQwtPlot::setAxisFont(intaxisId,constQFont&font)
       Change the font of an axis.

       Parameters:axisId Axis index
           font Font

       Warning:
           This function changes the font of the tick labels, not of the axis title.

   voidQwtPlot::setAxisLabelAlignment(intaxisId,Qt::Alignmentalignment)
       Change the alignment of the tick labels

       Parameters:axisId Axis index
           alignment Or'd Qt::AlignmentFlags see <qnamespace.h>

       Seealso:QwtScaleDraw::setLabelAlignment()voidQwtPlot::setAxisLabelRotation(intaxisId,doublerotation)
       Rotate all tick labels

       Parameters:axisId Axis index
           rotation  Angle  in  degrees. When changing the label rotation, the label alignment might be adjusted
           too.

       Seealso:QwtScaleDraw::setLabelRotation(), setAxisLabelAlignment()voidQwtPlot::setAxisMaxMajor(intaxisId,intmaxMajor)
       Set the maximum number of major scale intervals for a specified axis

       Parameters:axisId Axis index
           maxMajor Maximum number of major steps

       Seealso:axisMaxMajor()voidQwtPlot::setAxisMaxMinor(intaxisId,intmaxMinor)
       Set the maximum number of minor scale intervals for a specified axis

       Parameters:axisId Axis index
           maxMinor Maximum number of minor steps

       Seealso:axisMaxMinor()voidQwtPlot::setAxisScale(intaxisId,doublemin,doublemax,doublestepSize=0)
       Disable autoscaling and specify a fixed scale for a selected  axis.  In  updateAxes()  the  scale  engine
       calculates  a scale division from the specified parameters, that will be assigned to the scale widget. So
       updates of the scale widget usually happen delayed with the next replot.

       Parameters:axisId Axis index
           min Minimum of the scale
           max Maximum of the scale
           stepSize Major step size. If step == 0, the step size is calculated automatically using the  maxMajor
           setting.

       Seealso:setAxisMaxMajor(), setAxisAutoScale(), axisStepSize(), QwtScaleEngine::divideScale()voidQwtPlot::setAxisScaleDiv(intaxisId,constQwtScaleDiv&scaleDiv)
       Disable  autoscaling  and  specify  a  fixed scale for a selected axis. The scale division will be stored
       locally only until the next call of updateAxes(). So updates of the scale widget usually  happen  delayed
       with the next replot.

       Parameters:axisId Axis index
           scaleDiv Scale division

       Seealso:setAxisScale(), setAxisAutoScale()voidQwtPlot::setAxisScaleDraw(intaxisId,QwtScaleDraw*scaleDraw)
       Set a scale draw.

       Parameters:axisId Axis index
           scaleDraw Object responsible for drawing scales.

       By  passing  scaleDraw  it  is  possible  to  extend  QwtScaleDraw functionality and let it take place in
       QwtPlot. Please note that scaleDraw has to be created with new and will be deleted by  the  corresponding
       QwtScale member ( like a child object ).

       Seealso:QwtScaleDraw, QwtScaleWidgetWarning:
           The attributes of scaleDraw will be overwritten by those of the previous QwtScaleDraw.

   voidQwtPlot::setAxisScaleEngine(intaxisId,QwtScaleEngine*scaleEngine)
       Change the scale engine for an axis

       Parameters:axisId Axis index
           scaleEngine Scale engine

       Seealso:axisScaleEngine()voidQwtPlot::setAxisTitle(intaxisId,constQString&title)
       Change the title of a specified axis.

       Parameters:axisId Axis index
           title axis title

   voidQwtPlot::setAxisTitle(intaxisId,constQwtText&title)
       Change the title of a specified axis.

       Parameters:axisId Axis index
           title Axis title

   voidQwtPlot::setCanvas(QWidget*canvas)
       Set  the  drawing  canvas of the plot widget. QwtPlot invokes methods of the canvas as meta methods ( see
       QMetaObject ). In opposite to using conventional C++ techniques like virtual methods they  allow  to  use
       canvas implementations that are derived from QWidget or QGLWidget.

       The following meta methods could be implemented:

       • replot() When the canvas doesn't offer a replot method, QwtPlot calls update() instead.

       • borderPath()  The  border  path  is necessary to clip the content of the canvas When the canvas doesn't
         have any special border ( f.e rounded corners ) it is o.k. not to implement this method.

       The default canvas is a QwtPlotCanvasParameters:canvas Canvas Widget

       Seealso:canvas()voidQwtPlot::setCanvasBackground(constQBrush&brush)
       Change the background of the plotting area. Sets brush to QPalette::Window of all  color  groups  of  the
       palette of the canvas. Using canvas()->setPalette() is a more powerful way to set these colors.

       Parameters:brush New background brush

       Seealso:canvasBackground()voidQwtPlot::setFooter(constQString&text)
       Change the text the footer

       Parameters:text New text of the footer

   voidQwtPlot::setFooter(constQwtText&text)
       Change the text the footer

       Parameters:text New text of the footer

   voidQwtPlot::setPlotLayout(QwtPlotLayout*layout)
       Assign a new plot layout.

       Parameters:layout Layout()

       Seealso:plotLayout()voidQwtPlot::setTitle(constQString&title)
       Change the plot's title

       Parameters:title New title

   voidQwtPlot::setTitle(constQwtText&title)
       Change the plot's title

       Parameters:title New title

   QSizeQwtPlot::sizeHint()const[virtual]Returns:
           Size hint for the plot widget

       Seealso:minimumSizeHint()QwtTextQwtPlot::title()constReturns:
           Title of the plot

   QwtTextLabel*QwtPlot::titleLabel()Returns:
           Title label widget.

   constQwtTextLabel*QwtPlot::titleLabel()constReturns:
           Title label widget.

   doubleQwtPlot::transform(intaxisId,doublevalue)const
       Transform a value into a coordinate in the plotting region.

       Parameters:axisId Axis index
           value value

       Returns:
           X or Y coordinate in the plotting region corresponding to the value.

   voidQwtPlot::updateAxes()
       Rebuild  the  axes  scales.  In  case  of  autoscaling  the boundaries of a scale are calculated from the
       bounding  rectangles  of  all  plot   items,   having   the   QwtPlotItem::AutoScale   flag   enabled   (
       QwtScaleEngine::autoScale() ). Then a scale division is calculated ( QwtScaleEngine::didvideScale() ) and
       assigned to scale widget.

       When  the  scale  boundaries  have  been  assigned  with  setAxisScale() a scale division is calculated (
       QwtScaleEngine::didvideScale() ) for this interval and assigned to the scale widget.

       When the scale has been set explicitly by  setAxisScaleDiv()  the  locally  stored  scale  division  gets
       assigned to the scale widget.

       The scale widget indicates modifications by emitting a QwtScaleWidget::scaleDivChanged() signal.

       updateAxes() is usually called by replot().

       Seealso:setAxisAutoScale(), setAxisScale(), setAxisScaleDiv(), replot()QwtPlotItem::boundingRect()voidQwtPlot::updateCanvasMargins()
       Update  the  canvas margins. Plot items might indicate, that they need some extra space at the borders of
       the canvas by the QwtPlotItem::Margins flag.

       getCanvasMarginsHint(), QwtPlotItem::getCanvasMarginHint()voidQwtPlot::updateLayout()[virtual]
       Adjust plot content to its current size.

       Seealso:resizeEvent()voidQwtPlot::updateLegend()
       Emit legendDataChanged() for all plot item

       Seealso:QwtPlotItem::legendData(), legendDataChanged()voidQwtPlot::updateLegend(constQwtPlotItem*plotItem)
       Emit legendDataChanged() for a plot item

       Parameters:plotItem Plot item

       Seealso:QwtPlotItem::legendData(), legendDataChanged()

       QwtPlot - A 2-D plotting widget.

       #include <qwt_plot.h>

       Inherits QFrame, and QwtPlotDict.

   PublicTypes
       enum Axis { yLeft, yRight, xBottom, xTop, axisCnt }
           Axis index.
       enum LegendPosition { LeftLegend, RightLegend, BottomLegend, TopLegend }

   PublicSlots
       virtual void replot ()
           Redraw the plot.
       void autoRefresh ()
           Replots the plot if autoReplot() is true.

   Signals
       void itemAttached (QwtPlotItem *plotItem, bool on)
       void legendDataChanged (const QVariant &itemInfo, const QList< QwtLegendData > &data)

   PublicMemberFunctionsQwtPlot (QWidget *=NULL)
           Constructor.
       QwtPlot (const QwtText &title, QWidget *=NULL)
           Constructor.
       virtual ~QwtPlot ()
           Destructor.
       void applyProperties (const QString &)
       QString grabProperties () const
       void setAutoReplot (bool=true)
           Set or reset the autoReplot option.
       bool autoReplot () const
       void setPlotLayout (QwtPlotLayout *)
           Assign a new plot layout.
       QwtPlotLayout * plotLayout ()
       const QwtPlotLayout * plotLayout () const
       void setTitle (const QString &)
       void setTitle (const QwtText &)
       QwtTexttitle () const
       QwtTextLabel * titleLabel ()
       const QwtTextLabel * titleLabel () const
       void setFooter (const QString &)
       void setFooter (const QwtText &)
       QwtTextfooter () const
       QwtTextLabel * footerLabel ()
       const QwtTextLabel * footerLabel () const
       void setCanvas (QWidget *)
           Set the drawing canvas of the plot widget.
       QWidget * canvas ()
       const QWidget * canvas () const
       void setCanvasBackground (const QBrush &)
           Change the background of the plotting area.
       QBrush canvasBackground () const
       virtual QwtScaleMapcanvasMap (int axisId) const
       double invTransform (int axisId, int pos) const
       double transform (int axisId, double value) const
           Transform a value into a coordinate in the plotting region.
       QwtScaleEngine * axisScaleEngine (int axisId)
       const QwtScaleEngine * axisScaleEngine (int axisId) const
       void setAxisScaleEngine (int axisId, QwtScaleEngine *)
       void setAxisAutoScale (int axisId, bool on=true)
           Enable autoscaling for a specified axis.
       bool axisAutoScale (int axisId) const
       void enableAxis (int axisId, bool tf=true)
           Enable or disable a specified axis.
       bool axisEnabled (int axisId) const
       void setAxisFont (int axisId, const QFont &)
           Change the font of an axis.
       QFont axisFont (int axisId) const
       void setAxisScale (int axisId, double min, double max, double stepSize=0)
           Disable autoscaling and specify a fixed scale for a selected axis.
       void setAxisScaleDiv (int axisId, const QwtScaleDiv &)
           Disable autoscaling and specify a fixed scale for a selected axis.
       void setAxisScaleDraw (int axisId, QwtScaleDraw *)
           Set a scale draw.
       double axisStepSize (int axisId) const
           Return the step size parameter that has been set in setAxisScale.
       QwtIntervalaxisInterval (int axisId) const
           Return the current interval of the specified axis.
       const QwtScaleDiv & axisScaleDiv (int axisId) const
           Return the scale division of a specified axis.
       const QwtScaleDraw * axisScaleDraw (int axisId) const
           Return the scale draw of a specified axis.
       QwtScaleDraw * axisScaleDraw (int axisId)
           Return the scale draw of a specified axis.
       const QwtScaleWidget * axisWidget (int axisId) const
       QwtScaleWidget * axisWidget (int axisId)
       void setAxisLabelAlignment (int axisId, Qt::Alignment)
       void setAxisLabelRotation (int axisId, double rotation)
       void setAxisTitle (int axisId, const QString &)
           Change the title of a specified axis.
       void setAxisTitle (int axisId, const QwtText &)
           Change the title of a specified axis.
       QwtTextaxisTitle (int axisId) const
       void setAxisMaxMinor (int axisId, int maxMinor)
       int axisMaxMinor (int axisId) const
       void setAxisMaxMajor (int axisId, int maxMajor)
       int axisMaxMajor (int axisId) const
       void insertLegend (QwtAbstractLegend *, LegendPosition=QwtPlot::RightLegend, double ratio=-1.0)
           Insert a legend.
       QwtAbstractLegend * legend ()
       const QwtAbstractLegend * legend () const
       void updateLegend ()
       void updateLegend (const QwtPlotItem *)
       virtual QSize sizeHint () const
       virtual QSize minimumSizeHint () const
           Return a minimum size hint.
       virtual void updateLayout ()
           Adjust plot content to its current size.
       virtual void drawCanvas (QPainter *)
       void updateAxes ()
           Rebuild the axes scales.
       void updateCanvasMargins ()
           Update the canvas margins.
       virtual void getCanvasMarginsHint (const QwtScaleMap maps[], const QRectF &canvasRect, double &left,
           double &top, double &right, double &bottom) const
           Calculate the canvas margins.
       virtual bool event (QEvent *)
           Adds handling of layout requests.
       virtual bool eventFilter (QObject *, QEvent *)
           Event filter.
       virtual void drawItems (QPainter *, const QRectF &, const QwtScaleMap maps[axisCnt]) const
       virtual QVariant itemToInfo (QwtPlotItem *) const
           Build an information, that can be used to identify a plot item on the legend.
       virtual QwtPlotItem * infoToItem (const QVariant &) const
           Identify the plot item according to an item info object, that has bee generated from itemToInfo().

   ProtectedMemberFunctions
       virtual void resizeEvent (QResizeEvent *e)

   StaticProtectedMemberFunctions
       static bool axisValid (int axisId)