#include <qcustomplot.h>

Inheritance diagram for QCPCurve:

Collaboration diagram for QCPCurve:

Public Types
enum	LineStyle { lsNone, lsLine }

Public Member Functions
	QCPCurve (QCPAxis keyAxis, QCPAxis valueAxis)

virtual	~QCPCurve ()

QCPCurveDataMap *	data () const

QCPScatterStyle	scatterStyle () const

LineStyle	lineStyle () const

void	setData (QCPCurveDataMap *data, bool copy=false)

void	setData (const QVector< double > &t, const QVector< double > &key, const QVector< double > &value)

void	setData (const QVector< double > &key, const QVector< double > &value)

void	setScatterStyle (const QCPScatterStyle &style)

void	setLineStyle (LineStyle style)

void	addData (const QCPCurveDataMap &dataMap)

void	addData (const QCPCurveData &data)

void	addData (double t, double key, double value)

void	addData (double key, double value)

void	addData (const QVector< double > &ts, const QVector< double > &keys, const QVector< double > &values)

void	removeDataBefore (double t)

void	removeDataAfter (double t)

void	removeData (double fromt, double tot)

void	removeData (double t)

virtual void	clearData ()

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

Public Member 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 Member Functions inherited from QCPLayerable
	QCPLayerable (QCustomPlot plot, QString targetLayer=QString(), QCPLayerable parentLayerable=0)

	~QCPLayerable ()

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 Member 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	drawScatterPlot (QCPPainter painter, const QVector< QPointF > pointData) const

void	getCurveData (QVector< QPointF > *lineData) const

int	getRegion (double x, double y, double rectLeft, double rectTop, double rectRight, double rectBottom) const

QPointF	getOptimizedPoint (int prevRegion, double prevKey, double prevValue, double key, double value, double rectLeft, double rectTop, double rectRight, double rectBottom) const

QVector< QPointF >	getOptimizedCornerPoints (int prevRegion, int currentRegion, double prevKey, double prevValue, double key, double value, double rectLeft, double rectTop, double rectRight, double rectBottom) const

bool	mayTraverse (int prevRegion, int currentRegion) const

bool	getTraverse (double prevKey, double prevValue, double key, double value, double rectLeft, double rectTop, double rectRight, double rectBottom, QPointF &crossA, QPointF &crossB) const

void	getTraverseCornerPoints (int prevRegion, int currentRegion, double rectLeft, double rectTop, double rectRight, double rectBottom, QVector< QPointF > &beforeTraverse, QVector< QPointF > &afterTraverse) const

double	pointDistance (const QPointF &pixelPoint) const

Protected Member 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 Member 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

Protected Attributes
QCPCurveDataMap *	mData

QCPScatterStyle	mScatterStyle

LineStyle	mLineStyle

Protected Attributes inherited from QCPAbstractPlottable
QString	mName

bool	mAntialiasedFill

bool	mAntialiasedScatters

bool	mAntialiasedErrorBars

QPen	mPen

QPen	mSelectedPen

QBrush	mBrush

QBrush	mSelectedBrush

QPointer< QCPAxis >	mKeyAxis

QPointer< QCPAxis >	mValueAxis

bool	mSelectable

bool	mSelected

Protected Attributes inherited from QCPLayerable
bool	mVisible

QCustomPlot *	mParentPlot

QPointer< QCPLayerable >	mParentLayerable

QCPLayer *	mLayer

bool	mAntialiased

Friends
class	QCustomPlot

class	QCPLegend

Additional Inherited Members
Signals inherited from QCPAbstractPlottable
void	selectionChanged (bool selected)

void	selectableChanged (bool selectable)

Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

Protected Types inherited from QCPAbstractPlottable
enum	SignDomain { sdNegative, sdBoth, sdPositive }

Detailed Description

A plottable representing a parametric curve in a plot.

Unlike QCPGraph, plottables of this type may have multiple points with the same key coordinate, so their visual representation can have loops. This is realized by introducing a third coordinate t, which defines the order of the points described by the other two coordinates x and y.

To plot data, assign it with the setData or addData functions.

Gaps in the curve can be created by adding data points with NaN as key and value (qQNaN() or std::numeric_limits<double>::quiet_NaN()) in between the two data points that shall be separated.

Changing the appearance

The appearance of the curve is determined by the pen and the brush (setPen, setBrush).

Usage

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

Usually, you first create an instance and add it to the customPlot:

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

Definition at line 2660 of file qcustomplot.h.

Member Enumeration Documentation

enum LineStyle

Defines how the curve's line is represented visually in the plot. The line is drawn with the current pen of the curve (setPen).

See Also: setLineStyle

Enumerator
lsNone	No line is drawn between data points (e.g. only scatters)
lsLine	Data points are connected with a straight line.

Definition at line 2673 of file qcustomplot.h.

Constructor & Destructor Documentation

QCPCurve	(	QCPAxis *	keyAxis,
		QCPAxis *	valueAxis
	)

explicit

Constructs a curve 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 QCPCurve can be added to the plot with QCustomPlot::addPlottable, QCustomPlot then takes ownership of the graph.

Definition at line 16812 of file qcustomplot.cpp.

References lsLine, QCPAbstractPlottable::mBrush, mData, QCPAbstractPlottable::mPen, QCPAbstractPlottable::mSelectedBrush, QCPAbstractPlottable::mSelectedPen, setLineStyle(), and setScatterStyle().

~QCPCurve ( )

virtual

Definition at line 16829 of file qcustomplot.cpp.

References mData.

Member Function Documentation

void addData ( const QCPCurveDataMap & dataMap )

Adds the provided data points in dataMap to the current data.

See Also: removeData

Definition at line 16928 of file qcustomplot.cpp.

References mData.

void addData ( const QCPCurveData & data )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Adds the provided single data point in data to the current data.

See Also: removeData

Definition at line 16937 of file qcustomplot.cpp.

References mData, and QCPCurveData::t.

void addData	(	double	t,
		double	key,
		double	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Adds the provided single data point as t, key and value tuple to the current data

See Also: removeData

Definition at line 16946 of file qcustomplot.cpp.

References QCPCurveData::key, mData, QCPCurveData::t, and QCPCurveData::value.

void addData	(	double	key,
		double	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Adds the provided single data point as key and value pair to the current data The t parameter of the data point is set to the t of the last data point plus 1. If there is no last data point, t will be set to 0.

See Also: removeData

Definition at line 16963 of file qcustomplot.cpp.

References QCPCurveData::key, mData, QCPCurveData::t, and QCPCurveData::value.

void addData	(	const QVector< double > &	ts,
		const QVector< double > &	keys,
		const QVector< double > &	values
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Adds the provided data points as t, key and value tuples to the current data.

See Also: removeData

Definition at line 16979 of file qcustomplot.cpp.

References mData, and QCPCurveData::t.

void clearData ( )

virtual

Removes all data points.

See Also: removeData, removeDataAfter, removeDataBefore

Implements QCPAbstractPlottable.

Definition at line 17051 of file qcustomplot.cpp.

References mData.

QCPCurveDataMap* data ( ) const

inline

Definition at line 2680 of file qcustomplot.h.

Referenced by setData().

void draw ( QCPPainter * painter )

protectedvirtual

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

protectedvirtual

void drawScatterPlot	(	QCPPainter *	painter,
		const QVector< QPointF > *	pointData
	)		const

protectedvirtual

Definition at line 17198 of file qcustomplot.cpp.

References QCPAbstractPlottable::applyScattersAntialiasingHint(), QCPScatterStyle::applyTo(), QCPScatterStyle::drawShape(), QCPAbstractPlottable::mPen, and mScatterStyle.

Referenced by draw().

void getCurveData ( QVector< QPointF > * lineData ) const

protected

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 17943 of file qcustomplot.cpp.

References QCPRange::lower, mData, QCPAbstractPlottable::sdBoth, QCPAbstractPlottable::sdNegative, QCPAbstractPlottable::sdPositive, and QCPRange::upper.

QVector< QPointF > getOptimizedCornerPoints	(	int	prevRegion,
		int	currentRegion,
		double	prevKey,
		double	prevValue,
		double	key,
		double	value,
		double	rectLeft,
		double	rectTop,
		double	rectRight,
		double	rectBottom
	)		const

protected

Definition at line 17462 of file qcustomplot.cpp.

References QCPAbstractPlottable::coordsToPixels().

Referenced by getCurveData().

QPointF getOptimizedPoint	(	int	prevRegion,
		double	prevKey,
		double	prevValue,
		double	key,
		double	value,
		double	rectLeft,
		double	rectTop,
		double	rectRight,
		double	rectBottom
	)		const

protected

Definition at line 17362 of file qcustomplot.cpp.

References QCPAbstractPlottable::coordsToPixels().

Referenced by getCurveData().

int getRegion	(	double	x,
		double	y,
		double	rectLeft,
		double	rectTop,
		double	rectRight,
		double	rectBottom
	)		const

protected

Definition at line 17318 of file qcustomplot.cpp.

Referenced by getCurveData().

bool getTraverse	(	double	prevKey,
		double	prevValue,
		double	key,
		double	value,
		double	rectLeft,
		double	rectTop,
		double	rectRight,
		double	rectBottom,
		QPointF &	crossA,
		QPointF &	crossB
	)		const

protected

Definition at line 17729 of file qcustomplot.cpp.

References QCPAbstractPlottable::coordsToPixels().

Referenced by getCurveData().

void getTraverseCornerPoints	(	int	prevRegion,
		int	currentRegion,
		double	rectLeft,
		double	rectTop,
		double	rectRight,
		double	rectBottom,
		QVector< QPointF > &	beforeTraverse,
		QVector< QPointF > &	afterTraverse
	)		const

protected

Definition at line 17825 of file qcustomplot.cpp.

References QCPAbstractPlottable::coordsToPixels().

Referenced by getCurveData().

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 17979 of file qcustomplot.cpp.

References QCPRange::lower, mData, QCPAbstractPlottable::sdBoth, QCPAbstractPlottable::sdNegative, QCPAbstractPlottable::sdPositive, and QCPRange::upper.

LineStyle lineStyle ( ) const

inline

Definition at line 2682 of file qcustomplot.h.

bool mayTraverse	(	int	prevRegion,
		int	currentRegion
	)		const

protected

Definition at line 17626 of file qcustomplot.cpp.

Referenced by getCurveData().

double pointDistance ( const QPointF & pixelPoint ) const

protected

Definition at line 17915 of file qcustomplot.cpp.

References QCPAbstractPlottable::coordsToPixels(), QCPAbstractPlottable::distSqrToLine(), getCurveData(), mData, and QCPAbstractPlottable::mName.

Referenced by selectTest().

void removeData	(	double	fromt,
		double	tot
	)

Removes all data points with curve parameter t between fromt and tot. if fromt is greater or equal to tot, the function does nothing. To remove a single data point with known t, use removeData(double t).

See Also: addData, clearData

Definition at line 17024 of file qcustomplot.cpp.

References mData.

void removeData ( double t )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Removes a single data point at curve parameter t. If the position is not known with absolute precision, consider using removeData(double fromt, double tot) with a small fuzziness interval around the suspected position, depeding on the precision with which the curve parameter is known.

See Also: addData, clearData

Definition at line 17042 of file qcustomplot.cpp.

References mData.

void removeDataAfter ( double t )

Removes all data points with curve parameter t greater than t.

See Also: addData, clearData

Definition at line 17009 of file qcustomplot.cpp.

References mData.

void removeDataBefore ( double t )

Removes all data points with curve parameter t smaller than t.

See Also: addData, clearData

Definition at line 16998 of file qcustomplot.cpp.

References mData.

QCPScatterStyle scatterStyle ( ) const

inline

Definition at line 2681 of file qcustomplot.h.

double 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 object is represented not by single lines but by an area like a QCPItemText or the bars of a QCPBars plottable, a click inside the area should also be considered a hit. In these cases this function thus returns a constant value greater zero but still below the parent plot's selection tolerance. (typically the selectionTolerance multiplied by 0.99).

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.

Definition at line 17057 of file qcustomplot.cpp.

References mData, QCPAbstractPlottable::mKeyAxis, QCPAbstractPlottable::mSelectable, QCPAbstractPlottable::mValueAxis, and pointDistance().

void setData	(	QCPCurveDataMap *	data,
		bool	copy = `false`
	)

Replaces the current data with the provided data.

If copy is set to true, data points in data will only be copied. if false, the plottable takes ownership of the passed data and replaces the internal data pointer with it. This is significantly faster than copying for large datasets.

Definition at line 16841 of file qcustomplot.cpp.

References data(), and mData.

void setData	(	const QVector< double > &	t,
		const QVector< double > &	key,
		const QVector< double > &	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Replaces the current data with the provided points in t, key and value tuples. The provided vectors should have equal length. Else, the number of added points will be the size of the smallest vector.

Definition at line 16864 of file qcustomplot.cpp.

References mData, and QCPCurveData::t.

void setData	(	const QVector< double > &	key,
		const QVector< double > &	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Replaces the current data with the provided key and value pairs. The t parameter of each data point will be set to the integer index of the respective key/value pair.

Definition at line 16885 of file qcustomplot.cpp.

References mData, and QCPCurveData::t.

void setLineStyle ( QCPCurve::LineStyle style )

Sets how the single data points are connected in the plot or how they are represented visually apart from the scatter symbol. For scatter-only plots, set style to lsNone and setScatterStyle to the desired scatter style.

See Also: setScatterStyle

Definition at line 16919 of file qcustomplot.cpp.

References mLineStyle.

Referenced by QCPCurve().

void setScatterStyle ( const QCPScatterStyle & style )

Sets the visual appearance of single data points in the plot. If set to QCPScatterStyle::ssNone, no scatter points are drawn (e.g. for line-only plots with appropriate line style).