A plottable representing a single statistical box in a plot. More...

Inheritance diagram for QCPStatisticalBox:

Public Functions
	QCPStatisticalBox (QCPAxis keyAxis, QCPAxis valueAxis)
double	key () const
double	minimum () const
double	lowerQuartile () const
double	median () const
double	upperQuartile () const
double	maximum () const
QVector< double >	outliers () const
double	width () const
double	whiskerWidth () const
QPen	whiskerPen () const
QPen	whiskerBarPen () const
QPen	medianPen () const
QCPScatterStyle	outlierStyle () const
void	setKey (double key)
void	setMinimum (double value)
void	setLowerQuartile (double value)
void	setMedian (double value)
void	setUpperQuartile (double value)
void	setMaximum (double value)
void	setOutliers (const QVector< double > &values)
void	setData (double key, double minimum, double lowerQuartile, double median, double upperQuartile, double maximum)
void	setWidth (double width)
void	setWhiskerWidth (double width)
void	setWhiskerPen (const QPen &pen)
void	setWhiskerBarPen (const QPen &pen)
void	setMedianPen (const QPen &pen)
void	setOutlierStyle (const QCPScatterStyle &style)
virtual void	clearData ()
virtual double	selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const
Public Functions inherited from QCPAbstractPlottable
	QCPAbstractPlottable (QCPAxis keyAxis, QCPAxis valueAxis)
QString	name () const
bool	antialiasedFill () const
bool	antialiasedScatters () const
bool	antialiasedErrorBars () const
QPen	pen () const
QPen	selectedPen () const
QBrush	brush () const
QBrush	selectedBrush () const
QCPAxis *	keyAxis () const
QCPAxis *	valueAxis () const
bool	selectable () const
bool	selected () const
void	setName (const QString &name)
void	setAntialiasedFill (bool enabled)
void	setAntialiasedScatters (bool enabled)
void	setAntialiasedErrorBars (bool enabled)
void	setPen (const QPen &pen)
void	setSelectedPen (const QPen &pen)
void	setBrush (const QBrush &brush)
void	setSelectedBrush (const QBrush &brush)
void	setKeyAxis (QCPAxis *axis)
void	setValueAxis (QCPAxis *axis)
Q_SLOT void	setSelectable (bool selectable)
Q_SLOT void	setSelected (bool selected)
virtual bool	addToLegend ()
virtual bool	removeFromLegend () const
void	rescaleAxes (bool onlyEnlarge=false) const
void	rescaleKeyAxis (bool onlyEnlarge=false) const
void	rescaleValueAxis (bool onlyEnlarge=false) const
Public Functions inherited from QCPLayerable
	QCPLayerable (QCustomPlot plot, QString targetLayer="", QCPLayerable parentLayerable=0)
bool	visible () const
QCustomPlot *	parentPlot () const
QCPLayerable *	parentLayerable () const
QCPLayer *	layer () const
bool	antialiased () const
void	setVisible (bool on)
Q_SLOT bool	setLayer (QCPLayer *layer)
bool	setLayer (const QString &layerName)
void	setAntialiased (bool enabled)
bool	realVisibility () const

Protected Functions
virtual void	draw (QCPPainter *painter)
virtual void	drawLegendIcon (QCPPainter *painter, const QRectF &rect) const
virtual QCPRange	getKeyRange (bool &foundRange, SignDomain inSignDomain=sdBoth) const
virtual QCPRange	getValueRange (bool &foundRange, SignDomain inSignDomain=sdBoth) const
virtual void	drawQuartileBox (QCPPainter painter, QRectF quartileBox=0) const
virtual void	drawMedian (QCPPainter *painter) const
virtual void	drawWhiskers (QCPPainter *painter) const
virtual void	drawOutliers (QCPPainter *painter) const
Protected Functions inherited from QCPAbstractPlottable
virtual QRect	clipRect () const
virtual QCP::Interaction	selectionCategory () const
void	applyDefaultAntialiasingHint (QCPPainter *painter) const
virtual void	selectEvent (QMouseEvent event, bool additive, const QVariant &details, bool selectionStateChanged)
virtual void	deselectEvent (bool *selectionStateChanged)
void	coordsToPixels (double key, double value, double &x, double &y) const
const QPointF	coordsToPixels (double key, double value) const
void	pixelsToCoords (double x, double y, double &key, double &value) const
void	pixelsToCoords (const QPointF &pixelPos, double &key, double &value) const
QPen	mainPen () const
QBrush	mainBrush () const
void	applyFillAntialiasingHint (QCPPainter *painter) const
void	applyScattersAntialiasingHint (QCPPainter *painter) const
void	applyErrorBarsAntialiasingHint (QCPPainter *painter) const
double	distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const
Protected Functions inherited from QCPLayerable
virtual void	parentPlotInitialized (QCustomPlot *parentPlot)
void	initializeParentPlot (QCustomPlot *parentPlot)
void	setParentLayerable (QCPLayerable *parentLayerable)
bool	moveToLayer (QCPLayer *layer, bool prepend)
void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

Additional Inherited Members
Signals inherited from QCPAbstractPlottable
void	selectionChanged (bool selected)
void	selectableChanged (bool selectable)
Protected Types inherited from QCPAbstractPlottable
enum	SignDomain

Detailed Description

A plottable representing a single statistical box in a plot.

To plot data, assign it with the individual parameter functions or use setData to set all parameters at once. The individual functions are:

Additionally you can define a list of outliers, drawn as scatter datapoints:

setOutliers

Changing the appearance

The appearance of the box itself is controlled via setPen and setBrush. You may change the width of the box with setWidth in plot coordinates (not pixels).

Analog functions exist for the minimum/maximum-whiskers: setWhiskerPen, setWhiskerBarPen, setWhiskerWidth. The whisker width is the width of the bar at the top (maximum) and bottom (minimum).

The median indicator line has its own pen, setMedianPen.

If the whisker backbone pen is changed, make sure to set the capStyle to Qt::FlatCap. Else, the backbone line might exceed the whisker bars by a few pixels due to the pen cap being not perfectly flat.

The Outlier data points are drawn as normal scatter points. Their look can be controlled with setOutlierStyle

Usage

Like all data representing objects in QCustomPlot, the QCPStatisticalBox is a plottable (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies (QCustomPlot::plottable, QCustomPlot::addPlottable, QCustomPlot::removePlottable, etc.)

Usually, you first create an instance:

QCPStatisticalBox *newBox = new QCPStatisticalBox(customPlot->xAxis, customPlot->yAxis);

add it to the customPlot with QCustomPlot::addPlottable:

customPlot->addPlottable(newBox);

and then modify the properties of the newly created plottable, e.g.:

newBox->setName("Measurement Series 1");
newBox->setData(1, 3, 4, 5, 7);
newBox->setOutliers(QVector<double>() << 0.5 << 0.64 << 7.2 << 7.42);

Constructor & Destructor Documentation

QCPStatisticalBox::QCPStatisticalBox	(	QCPAxis *	keyAxis,
		QCPAxis *	valueAxis
	)

explicit

Constructs a statistical box which uses keyAxis as its key axis ("x") and valueAxis as its value axis ("y"). keyAxis and valueAxis must reside in the same QCustomPlot instance and not have the same orientation. If either of these restrictions is violated, a corresponding message is printed to the debug output (qDebug), the construction is not aborted, though.

The constructed statistical box can be added to the plot with QCustomPlot::addPlottable, QCustomPlot then takes ownership of the statistical box.

Member Function Documentation

void QCPStatisticalBox::setKey ( double key )

Sets the key coordinate of the statistical box.

void QCPStatisticalBox::setMinimum ( double value )

Sets the parameter "minimum" of the statistical box plot. This is the position of the lower whisker, typically the minimum measurement of the sample that's not considered an outlier.

See Also: setMaximum, setWhiskerPen, setWhiskerBarPen, setWhiskerWidth

void QCPStatisticalBox::setLowerQuartile ( double value )

Sets the parameter "lower Quartile" of the statistical box plot. This is the lower end of the box. The lower and the upper quartiles are the two statistical quartiles around the median of the sample, they contain 50% of the sample data.

See Also: setUpperQuartile, setPen, setBrush, setWidth

void QCPStatisticalBox::setMedian ( double value )

Sets the parameter "median" of the statistical box plot. This is the value of the median mark inside the quartile box. The median separates the sample data in half (50% of the sample data is below/above the median).

See Also: setMedianPen

void QCPStatisticalBox::setUpperQuartile ( double value )

Sets the parameter "upper Quartile" of the statistical box plot. This is the upper end of the box. The lower and the upper quartiles are the two statistical quartiles around the median of the sample, they contain 50% of the sample data.

See Also: setLowerQuartile, setPen, setBrush, setWidth

void QCPStatisticalBox::setMaximum ( double value )

Sets the parameter "maximum" of the statistical box plot. This is the position of the upper whisker, typically the maximum measurement of the sample that's not considered an outlier.

See Also: setMinimum, setWhiskerPen, setWhiskerBarPen, setWhiskerWidth

void QCPStatisticalBox::setOutliers ( const QVector< double > & values )

Sets a vector of outlier values that will be drawn as scatters. Any data points in the sample that are not within the whiskers (setMinimum, setMaximum) should be considered outliers and displayed as such.

See Also: setOutlierStyle

void QCPStatisticalBox::setData	(	double	key,
		double	minimum,
		double	lowerQuartile,
		double	median,
		double	upperQuartile,
		double	maximum
	)

Sets all parameters of the statistical box plot at once.

See Also: setKey, setMinimum, setLowerQuartile, setMedian, setUpperQuartile, setMaximum

void QCPStatisticalBox::setWidth ( double width )

Sets the width of the box in key coordinates.

See Also: setWhiskerWidth

void QCPStatisticalBox::setWhiskerWidth ( double width )

Sets the width of the whiskers (setMinimum, setMaximum) in key coordinates.

See Also: setWidth

void QCPStatisticalBox::setWhiskerPen ( const QPen & pen )

Sets the pen used for drawing the whisker backbone (That's the line parallel to the value axis).

Make sure to set the pen capStyle to Qt::FlatCap to prevent the whisker backbone from reaching a few pixels past the whisker bars, when using a non-zero pen width.

See Also: setWhiskerBarPen

void QCPStatisticalBox::setWhiskerBarPen ( const QPen & pen )

Sets the pen used for drawing the whisker bars (Those are the lines parallel to the key axis at each end of the whisker backbone).

See Also: setWhiskerPen

void QCPStatisticalBox::setMedianPen ( const QPen & pen )

Sets the pen used for drawing the median indicator line inside the statistical box.

void QCPStatisticalBox::setOutlierStyle ( const QCPScatterStyle & style )

Sets the appearance of the outlier data points.

See Also: setOutliers

void QCPStatisticalBox::clearData ( )

virtual

Clears all data in the plottable.

Implements QCPAbstractPlottable.

double QCPStatisticalBox::selectTest	(	const QPointF &	pos,
		bool	onlySelectable,
		QVariant *	details = `0`
	)		const

virtual

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

If the item is represented not by single lines but by an area like QCPItemRect or QCPItemText, a click inside the area returns a constant value greater zero (typically the selectionTolerance of the parent QCustomPlot multiplied by 0.99). If the click lies outside the area, this function returns -1.0.

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

You may pass 0 as details to indicate that you are not interested in those selection details.

See Also: selectEvent, deselectEvent, QCustomPlot::setInteractions

Implements QCPAbstractPlottable.

void QCPStatisticalBox::draw ( QCPPainter * painter )

protectedvirtual

This function draws the layerable with the specified painter. It is only called by QCustomPlot, if the layerable is visible (setVisible).

Before this function is called, the painter's antialiasing state is set via applyDefaultAntialiasingHint, see the documentation there. Further, the clipping rectangle was set to clipRect.

Implements QCPAbstractPlottable.

void QCPStatisticalBox::drawLegendIcon	(	QCPPainter *	painter,
		const QRectF &	rect
	)		const

protectedvirtual

called by QCPLegend::draw (via QCPPlottableLegendItem::draw) to create a graphical representation of this plottable inside rect, next to the plottable name.

Implements QCPAbstractPlottable.

QCPRange QCPStatisticalBox::getKeyRange	(	bool &	foundRange,
		SignDomain	inSignDomain = `sdBoth`
	)		const

protectedvirtual

called by rescaleAxes functions to get the full data key bounds. For logarithmic plots, one can set inSignDomain to either sdNegative or sdPositive in order to restrict the returned range to that sign domain. E.g. when only negative range is wanted, set inSignDomain to sdNegative and all positive points will be ignored for range calculation. For no restriction, just set inSignDomain to sdBoth (default). foundRange is an output parameter that indicates whether a range could be found or not. If this is false, you shouldn't use the returned range (e.g. no points in data).

Note that foundRange is not the same as QCPRange::validRange, since the range returned by this function may have size zero, which wouldn't count as a valid range.

See Also: rescaleAxes, getValueRange

Implements QCPAbstractPlottable.

QCPRange QCPStatisticalBox::getValueRange	(	bool &	foundRange,
		SignDomain	inSignDomain = `sdBoth`
	)		const

protectedvirtual

called by rescaleAxes functions to get the full data value bounds. For logarithmic plots, one can set inSignDomain to either sdNegative or sdPositive in order to restrict the returned range to that sign domain. E.g. when only negative range is wanted, set inSignDomain to sdNegative and all positive points will be ignored for range calculation. For no restriction, just set inSignDomain to sdBoth (default). foundRange is an output parameter that indicates whether a range could be found or not. If this is false, you shouldn't use the returned range (e.g. no points in data).

Note that foundRange is not the same as QCPRange::validRange, since the range returned by this function may have size zero, which wouldn't count as a valid range.

See Also: rescaleAxes, getKeyRange

Implements QCPAbstractPlottable.

void QCPStatisticalBox::drawQuartileBox	(	QCPPainter *	painter,
		QRectF *	quartileBox = `0`
	)		const

protectedvirtual

Draws the quartile box. box is an output parameter that returns the quartile box (in pixel coordinates) which is used to set the clip rect of the painter before calling drawMedian (so the median doesn't draw outside the quartile box).

void QCPStatisticalBox::drawMedian ( QCPPainter * painter ) const

protectedvirtual

Draws the median line inside the quartile box.

void QCPStatisticalBox::drawWhiskers ( QCPPainter * painter ) const

protectedvirtual

Draws both whisker backbones and bars.

void QCPStatisticalBox::drawOutliers ( QCPPainter * painter ) const

protectedvirtual

Draws the outlier scatter points.

The documentation for this class was generated from the following files:

src/plottables/plottable-statisticalbox.h
src/plottables/plottable-statisticalbox.cpp

Public Functions

Protected Functions

Additional Inherited Members

Detailed Description

Changing the appearance

Usage

Constructor & Destructor Documentation

Member Function Documentation