A plottable representing a bar chart in a plot. More...

#include <qcustomplot.h>

Inheritance diagram for QCPBars:

Public Types
enum	WidthType { wtAbsolute, wtAxisRectRatio, wtPlotCoords }

Public Member Functions
	QCPBars (QCPAxis keyAxis, QCPAxis valueAxis)

virtual	~QCPBars ()

double	width () const

WidthType	widthType () const

QCPBarsGroup *	barsGroup () const

double	baseValue () const

QCPBars *	barBelow () const

QCPBars *	barAbove () const

QCPBarDataMap *	data () const

void	setWidth (double width)

void	setWidthType (WidthType widthType)

void	setBarsGroup (QCPBarsGroup *barsGroup)

void	setBaseValue (double baseValue)

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

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

void	moveBelow (QCPBars *bars)

void	moveAbove (QCPBars *bars)

void	addData (const QCPBarDataMap &dataMap)

void	addData (const QCPBarData &data)

void	addData (double key, double value)

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

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

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	getVisibleDataBounds (QCPBarDataMap::const_iterator &lower, QCPBarDataMap::const_iterator &upperEnd) const

QPolygonF	getBarPolygon (double key, double value) const

void	getPixelWidth (double key, double &lower, double &upper) const

double	getStackedBaseValue (double key, bool positive) 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

Static Protected Member Functions
static void	connectBars (QCPBars lower, QCPBars upper)

Protected Attributes
QCPBarDataMap *	mData

double	mWidth

WidthType	mWidthType

QCPBarsGroup *	mBarsGroup

double	mBaseValue

QPointer< QCPBars >	mBarBelow

QPointer< QCPBars >	mBarAbove

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

class	QCPBarsGroup

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 bar chart in a plot.

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

Changing the appearance

The appearance of the bars is determined by the pen and the brush (setPen, setBrush). The width of the individual bars can be controlled with setWidthType and setWidth.

Bar charts are stackable. This means, two QCPBars plottables can be placed on top of each other (see QCPBars::moveAbove). So when two bars are at the same key position, they will appear stacked.

If you would like to group multiple QCPBars plottables together so they appear side by side as shown below, use QCPBarsGroup.

Usage

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

Usually, you first create an instance:

QCPBars *newBars = new QCPBars(customPlot->xAxis, customPlot->yAxis);

add it to the customPlot with QCustomPlot::addPlottable:

customPlot->addPlottable(newBars);

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

newBars->setName("Country population");

newBars->setData(xData, yData);

Definition at line 2873 of file qcustomplot.h.

Member Enumeration Documentation

enum QCPBars::WidthType

Defines the ways the width of the bar can be specified. Thus it defines what the number passed to setWidth actually means.

See also: setWidthType, setWidth

Enumerator
wtAbsolute	Bar width is in absolute pixels.
wtAxisRectRatio	Bar width is given by a fraction of the axis rect size.
wtPlotCoords	Bar width is in key coordinates and thus scales with the key axis range.

Definition at line 2891 of file qcustomplot.h.

Constructor & Destructor Documentation

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

explicit

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

Definition at line 18930 of file qcustomplot.cpp.

QCPBars::~QCPBars ( )

virtual

Definition at line 18949 of file qcustomplot.cpp.

Member Function Documentation

void QCPBars::addData ( const QCPBarDataMap & dataMap )

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

See also: removeData

Definition at line 19129 of file qcustomplot.cpp.

void QCPBars::addData ( const QCPBarData & 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 19138 of file qcustomplot.cpp.

void QCPBars::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 tuple to the current data

See also: removeData

Definition at line 19147 of file qcustomplot.cpp.

void QCPBars::addData	(	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 key and value tuples to the current data.

See also: removeData

Definition at line 19159 of file qcustomplot.cpp.

QCPBars * QCPBars::barAbove ( ) const

inline

Returns the bars plottable that is directly above this bars plottable. If there is no such plottable, returns 0.

See also: barBelow, moveBelow, moveAbove

Definition at line 2906 of file qcustomplot.h.

QCPBars * QCPBars::barBelow ( ) const

inline

Returns the bars plottable that is directly below this bars plottable. If there is no such plottable, returns 0.

See also: barAbove, moveBelow, moveAbove

Definition at line 2905 of file qcustomplot.h.

QCPBarsGroup* QCPBars::barsGroup ( ) const

inline

Definition at line 2903 of file qcustomplot.h.

double QCPBars::baseValue ( ) const

inline

Definition at line 2904 of file qcustomplot.h.

void QCPBars::clearData ( )

virtual

Removes all data points.

See also: removeData, removeDataAfter, removeDataBefore

Implements QCPAbstractPlottable.

Definition at line 19228 of file qcustomplot.cpp.

void QCPBars::connectBars	(	QCPBars *	lower,
		QCPBars *	upper
	)

staticprotected

Definition at line 19492 of file qcustomplot.cpp.

QCPBarDataMap* QCPBars::data ( ) const

inline

Definition at line 2907 of file qcustomplot.h.

void QCPBars::draw ( QCPPainter * painter )

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 19254 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 19289 of file qcustomplot.cpp.

QPolygonF QCPBars::getBarPolygon	(	double	key,
		double	value
	)		const

protected

Definition at line 19368 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 19522 of file qcustomplot.cpp.

void QCPBars::getPixelWidth	(	double	key,
		double &	lower,
		double &	upper
	)		const

protected

Definition at line 19408 of file qcustomplot.cpp.

double QCPBars::getStackedBaseValue	(	double	key,
		bool	positive
	)		const

protected

Definition at line 19460 of file qcustomplot.cpp.

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

protectedvirtual

Implements QCPAbstractPlottable.

Definition at line 19572 of file qcustomplot.cpp.

void QCPBars::getVisibleDataBounds	(	QCPBarDataMap::const_iterator &	lower,
		QCPBarDataMap::const_iterator &	upperEnd
	)		const

protected

Definition at line 19314 of file qcustomplot.cpp.

void QCPBars::moveAbove ( QCPBars * bars )

Moves this bars plottable above bars. In other words, the bars of this plottable will appear above the bars of bars. The move target bars must use the same key and value axis as this plottable.

Inserting into and removing from existing bar stacking is handled gracefully. If bars already has a bars object below itself, this bars object is inserted between the two. If this bars object is already between two other bars, the two other bars will be stacked on top of each other after the operation.

To remove this bars plottable from any stacking, set bars to 0.

See also: moveBelow, barBelow, barAbove

Definition at line 19106 of file qcustomplot.cpp.

void QCPBars::moveBelow ( QCPBars * bars )

Moves this bars plottable below bars. In other words, the bars of this plottable will appear below the bars of bars. The move target bars must use the same key and value axis as this plottable.

Inserting into and removing from existing bar stacking is handled gracefully. If bars already has a bars object below itself, this bars object is inserted between the two. If this bars object is already between two other bars, the two other bars will be stacked on top of each other after the operation.

To remove this bars plottable from any stacking, set bars to 0.

See also: moveBelow, barAbove, barBelow

Definition at line 19073 of file qcustomplot.cpp.

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

Removes all data points with key 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 19202 of file qcustomplot.cpp.

void QCPBars::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 19219 of file qcustomplot.cpp.

void QCPBars::removeDataAfter ( double key )

Removes all data points with key greater than key.

See also: addData, clearData

Definition at line 19187 of file qcustomplot.cpp.

void QCPBars::removeDataBefore ( double key )

Removes all data points with key smaller than key.

See also: addData, clearData

Definition at line 19176 of file qcustomplot.cpp.

double QCPBars::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 19234 of file qcustomplot.cpp.

void QCPBars::setBarsGroup ( QCPBarsGroup * barsGroup )

Sets to which QCPBarsGroup this QCPBars instance belongs to. Alternatively, you can also use QCPBarsGroup::append.

To remove this QCPBars from any group, set barsGroup to 0.

Definition at line 18987 of file qcustomplot.cpp.

void QCPBars::setBaseValue ( double baseValue )

Sets the base value of this bars plottable.

The base value defines where on the value coordinate the bars start. How far the bars extend from the base value is given by their individual value data. For example, if the base value is set to 1, a bar with data value 2 will have its lowest point at value coordinate 1 and highest point at 3.

For stacked bars, only the base value of the bottom-most QCPBars has meaning.

The default base value is 0.

Definition at line 19010 of file qcustomplot.cpp.

void QCPBars::setData	(	QCPBarDataMap *	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 19022 of file qcustomplot.cpp.

void QCPBars::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 points in 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 19045 of file qcustomplot.cpp.

void QCPBars::setWidth ( double width )

Sets the width of the bars.

How the number passed as width is interpreted (e.g. screen pixels, plot coordinates,...), depends on the currently set width type, see setWidthType and WidthType.

Definition at line 18963 of file qcustomplot.cpp.

void QCPBars::setWidthType ( QCPBars::WidthType widthType )

Sets how the width of the bars is defined. See the documentation of WidthType for an explanation of the possible values for widthType.

The default value is wtPlotCoords.

See also: setWidth

Definition at line 18976 of file qcustomplot.cpp.

double QCPBars::width ( ) const

inline

Definition at line 2901 of file qcustomplot.h.

WidthType QCPBars::widthType ( ) const

inline

Definition at line 2902 of file qcustomplot.h.

Friends And Related Function Documentation

friend class QCPBarsGroup

friend

Definition at line 2957 of file qcustomplot.h.

friend class QCPLegend

friend

Definition at line 2956 of file qcustomplot.h.

friend class QCustomPlot

friend

Definition at line 2955 of file qcustomplot.h.

Member Data Documentation

QPointer<QCPBars> QCPBars::mBarAbove

protected

Definition at line 2940 of file qcustomplot.h.

QPointer<QCPBars> QCPBars::mBarBelow

protected

Definition at line 2940 of file qcustomplot.h.

QCPBarsGroup* QCPBars::mBarsGroup

protected

Definition at line 2938 of file qcustomplot.h.

double QCPBars::mBaseValue

protected

Definition at line 2939 of file qcustomplot.h.

QCPBarDataMap* QCPBars::mData

protected

Definition at line 2935 of file qcustomplot.h.

double QCPBars::mWidth

protected

Definition at line 2936 of file qcustomplot.h.

WidthType QCPBars::mWidthType

protected

Definition at line 2937 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

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Changing the appearance

Usage

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation