A plottable representing a financial stock chart. More...

#include <qcustomplot.h>

Inheritance diagram for QCPFinancial:

Public Types
enum	ChartStyle { csOhlc, csCandlestick }

Public Member Functions
	QCPFinancial (QCPAxis keyAxis, QCPAxis valueAxis)

virtual	~QCPFinancial ()

QCPFinancialDataMap *	data () const

ChartStyle	chartStyle () const

double	width () const

bool	twoColored () const

QBrush	brushPositive () const

QBrush	brushNegative () const

QPen	penPositive () const

QPen	penNegative () const

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

void	setData (const QVector< double > &key, const QVector< double > &open, const QVector< double > &high, const QVector< double > &low, const QVector< double > &close)

void	setChartStyle (ChartStyle style)

void	setWidth (double width)

void	setTwoColored (bool twoColored)

void	setBrushPositive (const QBrush &brush)

void	setBrushNegative (const QBrush &brush)

void	setPenPositive (const QPen &pen)

void	setPenNegative (const QPen &pen)

void	addData (const QCPFinancialDataMap &dataMap)

void	addData (const QCPFinancialData &data)

void	addData (double key, double open, double high, double low, double close)

void	addData (const QVector< double > &key, const QVector< double > &open, const QVector< double > &high, const QVector< double > &low, const QVector< double > &close)

void	removeDataBefore (double key)

void	removeDataAfter (double key)

void	removeData (double fromKey, double toKey)

void	removeData (double key)

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

Static Public Member Functions
static QCPFinancialDataMap	timeSeriesToOhlc (const QVector< double > &time, const QVector< double > &value, double timeBinSize, double timeBinOffset=0)

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

void	drawOhlcPlot (QCPPainter *painter, const QCPFinancialDataMap::const_iterator &begin, const QCPFinancialDataMap::const_iterator &end)

void	drawCandlestickPlot (QCPPainter *painter, const QCPFinancialDataMap::const_iterator &begin, const QCPFinancialDataMap::const_iterator &end)

double	ohlcSelectTest (const QPointF &pos, const QCPFinancialDataMap::const_iterator &begin, const QCPFinancialDataMap::const_iterator &end) const

double	candlestickSelectTest (const QPointF &pos, const QCPFinancialDataMap::const_iterator &begin, const QCPFinancialDataMap::const_iterator &end) const

void	getVisibleDataBounds (QCPFinancialDataMap::const_iterator &lower, QCPFinancialDataMap::const_iterator &upper) 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
QCPFinancialDataMap *	mData

ChartStyle	mChartStyle

double	mWidth

bool	mTwoColored

QBrush	mBrushPositive

QBrush	mBrushNegative

QPen	mPenPositive

QPen	mPenNegative

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 financial stock chart.

This plottable represents time series data binned to certain intervals, mainly used for stock charts. The two common representations OHLC (Open-High-Low-Close) bars and Candlesticks can be set via setChartStyle.

The data is passed via setData as a set of open/high/low/close values at certain keys (typically times). This means the data must be already binned appropriately. If data is only available as a series of values (e.g. price against time), you can use the static convenience function timeSeriesToOhlc to generate binned OHLC-data which can then be passed to setData.

The width of the OHLC bars/candlesticks can be controlled with setWidth and is given in plot key coordinates. A typical choice is to set it to (or slightly less than) one bin interval width.

Changing the appearance

Charts can be either single- or two-colored (setTwoColored). If set to be single-colored, lines are drawn with the plottable's pen (setPen) and fills with the brush (setBrush).

If set to two-colored, positive changes of the value during an interval (close >= open) are represented with a different pen and brush than negative changes (close < open). These can be configured with setPenPositive, setPenNegative, setBrushPositive, and setBrushNegative. In two-colored mode, the normal plottable pen/brush is ignored. Upon selection however, the normal selected pen/brush (setSelectedPen, setSelectedBrush) is used, irrespective of whether the chart is single- or two-colored.

Definition at line 3195 of file qcustomplot.h.

Member Enumeration Documentation

enum QCPFinancial::ChartStyle

Defines the possible representations of OHLC data in the plot.

See also: setChartStyle

Enumerator
csOhlc	Open-High-Low-Close bar representation.
csCandlestick	Candlestick representation.

Definition at line 3213 of file qcustomplot.h.

Constructor & Destructor Documentation

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

explicit

Constructs a financial chart 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 QCPFinancial can be added to the plot with QCustomPlot::addPlottable, QCustomPlot then takes ownership of the financial chart.

Definition at line 21057 of file qcustomplot.cpp.

QCPFinancial::~QCPFinancial ( )

virtual

Definition at line 21074 of file qcustomplot.cpp.

Member Function Documentation

void QCPFinancial::addData ( const QCPFinancialDataMap & dataMap )

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

Alternatively, you can also access and modify the data via the data method, which returns a pointer to the internal QCPFinancialDataMap.

See also: removeData

Definition at line 21225 of file qcustomplot.cpp.

void QCPFinancial::addData ( const QCPFinancialData & 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.

Alternatively, you can also access and modify the data via the data method, which returns a pointer to the internal QCPFinancialData.

See also: removeData

Definition at line 21239 of file qcustomplot.cpp.

void QCPFinancial::addData	(	double	key,
		double	open,
		double	high,
		double	low,
		double	close
	)

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 given by key, open, high, low, and close to the current data.

Alternatively, you can also access and modify the data via the data method, which returns a pointer to the internal QCPFinancialData.

See also: removeData

Definition at line 21254 of file qcustomplot.cpp.

void QCPFinancial::addData	(	const QVector< double > &	key,
		const QVector< double > &	open,
		const QVector< double > &	high,
		const QVector< double > &	low,
		const QVector< double > &	close
	)

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 open/high/low/close data to the current data.

Alternatively, you can also access and modify the data via the data method, which returns a pointer to the internal QCPFinancialData.

See also: removeData

Definition at line 21268 of file qcustomplot.cpp.

QBrush QCPFinancial::brushNegative ( ) const

inline

Definition at line 3227 of file qcustomplot.h.

QBrush QCPFinancial::brushPositive ( ) const

inline

Definition at line 3226 of file qcustomplot.h.

double QCPFinancial::candlestickSelectTest	(	const QPointF &	pos,
		const QCPFinancialDataMap::const_iterator &	begin,
		const QCPFinancialDataMap::const_iterator &	end
	)		const

protected

Definition at line 21779 of file qcustomplot.cpp.

ChartStyle QCPFinancial::chartStyle ( ) const

inline

Definition at line 3223 of file qcustomplot.h.

void QCPFinancial::clearData ( )

virtual

Removes all data points.

See also: removeData, removeDataAfter, removeDataBefore

Implements QCPAbstractPlottable.

Definition at line 21340 of file qcustomplot.cpp.

QCPFinancialDataMap * QCPFinancial::data ( ) const

inline

Returns a pointer to the internal data storage of type QCPFinancialDataMap. You may use it to directly manipulate the data, which may be more convenient and faster than using the regular setData or addData methods, in certain situations.

Definition at line 3222 of file qcustomplot.h.

void QCPFinancial::draw ( QCPPainter * painter )

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 21425 of file qcustomplot.cpp.

void QCPFinancial::drawCandlestickPlot	(	QCPPainter *	painter,
		const QCPFinancialDataMap::const_iterator &	begin,
		const QCPFinancialDataMap::const_iterator &	end
	)

protected

Definition at line 21650 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 21444 of file qcustomplot.cpp.

void QCPFinancial::drawOhlcPlot	(	QCPPainter *	painter,
		const QCPFinancialDataMap::const_iterator &	begin,
		const QCPFinancialDataMap::const_iterator &	end
	)

protected

Definition at line 21589 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 21503 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 21539 of file qcustomplot.cpp.

void QCPFinancial::getVisibleDataBounds	(	QCPFinancialDataMap::const_iterator &	lower,
		QCPFinancialDataMap::const_iterator &	upper
	)		const

protected

Definition at line 21855 of file qcustomplot.cpp.

double QCPFinancial::ohlcSelectTest	(	const QPointF &	pos,
		const QCPFinancialDataMap::const_iterator &	begin,
		const QCPFinancialDataMap::const_iterator &	end
	)		const

protected

Definition at line 21741 of file qcustomplot.cpp.

QPen QCPFinancial::penNegative ( ) const

inline

Definition at line 3229 of file qcustomplot.h.

QPen QCPFinancial::penPositive ( ) const

inline

Definition at line 3228 of file qcustomplot.h.

void QCPFinancial::removeData	(	double	fromKey,
		double	toKey
	)

Removes all data points with keys between fromKey and toKey. if fromKey is greater or equal to toKey, the function does nothing. To remove a single data point with known key, use removeData(double key).

See also: addData, clearData

Definition at line 21313 of file qcustomplot.cpp.

void QCPFinancial::removeData ( double key )

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 key. If the position is not known with absolute precision, consider using removeData(double fromKey, double toKey) with a small fuzziness interval around the suspected position, depeding on the precision with which the key is known.

See also: addData, clearData

Definition at line 21330 of file qcustomplot.cpp.

void QCPFinancial::removeDataAfter ( double key )

Removes all data points with keys greater than key.

See also: addData, clearData

Definition at line 21298 of file qcustomplot.cpp.

void QCPFinancial::removeDataBefore ( double key )

Removes all data points with keys smaller than key.

See also: addData, clearData

Definition at line 21286 of file qcustomplot.cpp.

double QCPFinancial::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.

Definition at line 21346 of file qcustomplot.cpp.

void QCPFinancial::setBrushNegative ( const QBrush & brush )

If setTwoColored is set to true, this function controls the brush that is used to draw fills of data points with a negative trend (i.e. bars/candlesticks with close < open).

If twoColored is false, the normal plottable's pen and brush are used (setPen, setBrush).

See also: setBrushPositive, setPenNegative, setPenPositive

Definition at line 21184 of file qcustomplot.cpp.

void QCPFinancial::setBrushPositive ( const QBrush & brush )

If setTwoColored is set to true, this function controls the brush that is used to draw fills of data points with a positive trend (i.e. bars/candlesticks with close >= open).

If twoColored is false, the normal plottable's pen and brush are used (setPen, setBrush).

See also: setBrushNegative, setPenPositive, setPenNegative

Definition at line 21170 of file qcustomplot.cpp.

void QCPFinancial::setChartStyle ( QCPFinancial::ChartStyle style )

Sets which representation style shall be used to display the OHLC data.

Definition at line 21132 of file qcustomplot.cpp.

void QCPFinancial::setData	(	QCPFinancialDataMap *	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.

Alternatively, you can also access and modify the plottable's data via the data method, which returns a pointer to the internal QCPFinancialDataMap.

See also: timeSeriesToOhlc

Definition at line 21091 of file qcustomplot.cpp.

void QCPFinancial::setData	(	const QVector< double > &	key,
		const QVector< double > &	open,
		const QVector< double > &	high,
		const QVector< double > &	low,
		const QVector< double > &	close
	)

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 open/high/low/close data. The provided vectors should have equal length. Else, the number of added points will be the size of the smallest vector.

See also: timeSeriesToOhlc

Definition at line 21115 of file qcustomplot.cpp.

void QCPFinancial::setPenNegative ( const QPen & pen )

If setTwoColored is set to true, this function controls the pen that is used to draw outlines of data points with a negative trend (i.e. bars/candlesticks with close < open).

If twoColored is false, the normal plottable's pen and brush are used (setPen, setBrush).

See also: setPenPositive, setBrushNegative, setBrushPositive

Definition at line 21212 of file qcustomplot.cpp.

void QCPFinancial::setPenPositive ( const QPen & pen )

If setTwoColored is set to true, this function controls the pen that is used to draw outlines of data points with a positive trend (i.e. bars/candlesticks with close >= open).

If twoColored is false, the normal plottable's pen and brush are used (setPen, setBrush).

See also: setPenNegative, setBrushPositive, setBrushNegative

Definition at line 21198 of file qcustomplot.cpp.

void QCPFinancial::setTwoColored ( bool twoColored )

Sets whether this chart shall contrast positive from negative trends per data point by using two separate colors to draw the respective bars/candlesticks.

If twoColored is false, the normal plottable's pen and brush are used (setPen, setBrush).

See also: setPenPositive, setPenNegative, setBrushPositive, setBrushNegative

Definition at line 21156 of file qcustomplot.cpp.

void QCPFinancial::setWidth ( double width )

Sets the width of the individual bars/candlesticks to width in plot key coordinates.

A typical choice is to set it to (or slightly less than) one bin interval width.

Definition at line 21142 of file qcustomplot.cpp.

QCPFinancialDataMap QCPFinancial::timeSeriesToOhlc	(	const QVector< double > &	time,
		const QVector< double > &	value,
		double	timeBinSize,
		double	timeBinOffset = `0`
	)

static

A convenience function that converts time series data (value against time) to OHLC binned data points. The return value can then be passed on to setData.

The size of the bins can be controlled with timeBinSize in the same units as time is given. For example, if the unit of time is seconds and single OHLC/Candlesticks should span an hour each, set timeBinSize to 3600.

timeBinOffset allows to control precisely at what time coordinate a bin should start. The value passed as timeBinOffset doesn't need to be in the range encompassed by the time keys. It merely defines the mathematical offset/phase of the bins that will be used to process the data.

Definition at line 21385 of file qcustomplot.cpp.

bool QCPFinancial::twoColored ( ) const

inline

Definition at line 3225 of file qcustomplot.h.

double QCPFinancial::width ( ) const

inline

Definition at line 3224 of file qcustomplot.h.

Friends And Related Function Documentation

friend class QCPLegend

friend

Definition at line 3283 of file qcustomplot.h.

friend class QCustomPlot

friend

Definition at line 3282 of file qcustomplot.h.

Member Data Documentation

QBrush QCPFinancial::mBrushNegative

protected

Definition at line 3266 of file qcustomplot.h.

QBrush QCPFinancial::mBrushPositive

protected

Definition at line 3266 of file qcustomplot.h.

ChartStyle QCPFinancial::mChartStyle

protected

Definition at line 3263 of file qcustomplot.h.

QCPFinancialDataMap* QCPFinancial::mData

protected

Definition at line 3262 of file qcustomplot.h.

QPen QCPFinancial::mPenNegative

protected

Definition at line 3267 of file qcustomplot.h.

QPen QCPFinancial::mPenPositive

protected

Definition at line 3267 of file qcustomplot.h.

bool QCPFinancial::mTwoColored

protected

Definition at line 3265 of file qcustomplot.h.

double QCPFinancial::mWidth

protected

Definition at line 3264 of file qcustomplot.h.

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

Projects/VespucciProject/Vespucci/Vespucci/qcustomplot.h
Projects/VespucciProject/Vespucci/Vespucci/qcustomplot.cpp

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Changing the appearance

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation