QCPAbstractPlottable Class Reference

Inheritance diagram for QCPAbstractPlottable:

Signals
void	selectableChanged (QCP::SelectionType selectable)
void	selectionChanged (bool selected)
void	selectionChanged (const QCPDataSelection &selection)
Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

Public Member Functions
	QCPAbstractPlottable (QCPAxis *keyAxis, QCPAxis *valueAxis)
bool	addToLegend ()
bool	addToLegend (QCPLegend *legend)
bool	antialiasedFill () const
bool	antialiasedScatters () const
QBrush	brush () const
const QPointF	coordsToPixels (double key, double value) const
void	coordsToPixels (double key, double value, double &x, double &y) const
virtual QCPRange	getKeyRange (bool &foundRange, QCP::SignDomain inSignDomain=QCP::sdBoth) const =0
virtual QCPRange	getValueRange (bool &foundRange, QCP::SignDomain inSignDomain=QCP::sdBoth, const QCPRange &inKeyRange=QCPRange()) const =0
virtual QCPPlottableInterface1D *	interface1D ()
QCPAxis *	keyAxis () const
QString	name () const
QPen	pen () const
void	pixelsToCoords (const QPointF &pixelPos, double &key, double &value) const
void	pixelsToCoords (double x, double y, double &key, double &value) const
bool	removeFromLegend () const
bool	removeFromLegend (QCPLegend *legend) const
void	rescaleAxes (bool onlyEnlarge=false) const
void	rescaleKeyAxis (bool onlyEnlarge=false) const
void	rescaleValueAxis (bool onlyEnlarge=false, bool inKeyRange=false) const
QCP::SelectionType	selectable () const
bool	selected () const
QCPDataSelection	selection () const
QCPSelectionDecorator *	selectionDecorator () const
virtual double	selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const override=0
void	setAntialiasedFill (bool enabled)
void	setAntialiasedScatters (bool enabled)
void	setBrush (const QBrush &brush)
void	setKeyAxis (QCPAxis *axis)
void	setName (const QString &name)
void	setPen (const QPen &pen)
Q_SLOT void	setSelectable (QCP::SelectionType selectable)
Q_SLOT void	setSelection (QCPDataSelection selection)
void	setSelectionDecorator (QCPSelectionDecorator *decorator)
void	setValueAxis (QCPAxis *axis)
QCPAxis *	valueAxis () const
Public Member Functions inherited from QCPLayerable
	QCPLayerable (QCustomPlot *plot, QString targetLayer=QString(), QCPLayerable *parentLayerable=nullptr)
bool	antialiased () const
QCPLayer *	layer () const
QCPLayerable *	parentLayerable () const
QCustomPlot *	parentPlot () const
bool	realVisibility () const
void	setAntialiased (bool enabled)
bool	setLayer (const QString &layerName)
Q_SLOT bool	setLayer (QCPLayer *layer)
void	setVisible (bool on)
bool	visible () const
Public Member Functions inherited from QObject
	QObject (QObject *parent)
QBindable< QString >	bindableObjectName ()
bool	blockSignals (bool block)
const QObjectList &	children () const const
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const char *signal, const QObject *receiver, const char *method) const const
bool	disconnect (const QObject *receiver, const char *method) const const
void	dumpObjectInfo () const const
void	dumpObjectTree () const const
QList< QByteArray >	dynamicPropertyNames () const const
virtual bool	event (QEvent *e)
virtual bool	eventFilter (QObject *watched, QEvent *event)
T	findChild (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (Qt::FindChildOptions options) const const
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
bool	isQuickItemType () const const
bool	isWidgetType () const const
bool	isWindowType () const const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const const
void	moveToThread (QThread *targetThread)
QString	objectName () const const
void	objectNameChanged (const QString &objectName)
QObject *	parent () const const
QVariant	property (const char *name) const const
	Q_CLASSINFO (Name, Value)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_GADGET_EXPORT (EXPORT_MACRO)
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	Q_MOC_INCLUDE Q_MOC_INCLUDE
	Q_NAMESPACE Q_NAMESPACE
	Q_NAMESPACE_EXPORT (EXPORT_MACRO)
	Q_OBJECT Q_OBJECT
	Q_PROPERTY (...)
	Q_REVISION Q_REVISION
	Q_SET_OBJECT_NAME (Object)
	Q_SIGNAL Q_SIGNAL
	Q_SIGNALS Q_SIGNALS
	Q_SLOT Q_SLOT
	Q_SLOTS Q_SLOTS
T	qobject_cast (const QObject *object)
T	qobject_cast (QObject *object)
	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
void	removeEventFilter (QObject *obj)
void	setObjectName (const QString &name)
void	setObjectName (QAnyStringView name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	setProperty (const char *name, QVariant &&value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)
QThread *	thread () const const

Protected Member Functions
void	applyDefaultAntialiasingHint (QCPPainter *painter) const override
void	applyFillAntialiasingHint (QCPPainter *painter) const
void	applyScattersAntialiasingHint (QCPPainter *painter) const
virtual QRect	clipRect () const override
virtual void	deselectEvent (bool *selectionStateChanged) override
virtual void	draw (QCPPainter *painter) override=0
virtual void	drawLegendIcon (QCPPainter *painter, const QRectF &rect) const =0
virtual void	selectEvent (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged) override
virtual QCP::Interaction	selectionCategory () const override
Protected Member Functions inherited from QCPLayerable
void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const
void	initializeParentPlot (QCustomPlot *parentPlot)
virtual void	mouseDoubleClickEvent (QMouseEvent *event, const QVariant &details)
virtual void	mouseMoveEvent (QMouseEvent *event, const QPointF &startPos)
virtual void	mousePressEvent (QMouseEvent *event, const QVariant &details)
virtual void	mouseReleaseEvent (QMouseEvent *event, const QPointF &startPos)
bool	moveToLayer (QCPLayer *layer, bool prepend)
virtual void	parentPlotInitialized (QCustomPlot *parentPlot)
void	setParentLayerable (QCPLayerable *parentLayerable)
virtual void	wheelEvent (QWheelEvent *event)
Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const QMetaMethod &signal)
virtual void	customEvent (QEvent *event)
virtual void	disconnectNotify (const QMetaMethod &signal)
bool	isSignalConnected (const QMetaMethod &signal) const const
int	receivers (const char *signal) const const
QObject *	sender () const const
int	senderSignalIndex () const const
virtual void	timerEvent (QTimerEvent *event)

Protected Attributes
bool	mAntialiasedFill
bool	mAntialiasedScatters
QBrush	mBrush
QPointer< QCPAxis >	mKeyAxis
QString	mName
QPen	mPen
QCP::SelectionType	mSelectable
QCPDataSelection	mSelection
QCPSelectionDecorator *	mSelectionDecorator
QPointer< QCPAxis >	mValueAxis
Protected Attributes inherited from QCPLayerable
bool	mAntialiased
QCPLayer *	mLayer
QPointer< QCPLayerable >	mParentLayerable
QCustomPlot *	mParentPlot
bool	mVisible

Additional Inherited Members
Properties inherited from QObject
	objectName
Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
bool	disconnect (const QMetaObject::Connection &connection)
bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
bool	disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
QString	tr (const char *sourceText, const char *disambiguation, int n)
Public Attributes inherited from QObject
typedef	QObjectList

Detailed Description

The abstract base class for all data representing objects in a plot.

It defines a very basic interface like name, pen, brush, visibility etc. Since this class is abstract, it can't be instantiated. Use one of the subclasses or create a subclass yourself to create new ways of displaying data (see "Creating own plottables" below). Plottables that display one-dimensional data (i.e. data points have a single key dimension and one or multiple values at each key) are based off of the template subclass QCPAbstractPlottable1D, see details there.

All further specifics are in the subclasses, for example:

• A normal graph with possibly a line and/or scatter points QCPGraph (typically created with QCustomPlot::addGraph)
• A parametric curve: QCPCurve
• A bar chart: QCPBars
• A statistical box plot: QCPStatisticalBox
• A color encoded two-dimensional map: QCPColorMap
• An OHLC/Candlestick chart: QCPFinancial

Creating own plottables

Subclassing directly from QCPAbstractPlottable is only recommended if you wish to display two-dimensional data like QCPColorMap, i.e. two logical key dimensions and one (or more) data dimensions. If you want to display data with only one logical key dimension, you should rather derive from QCPAbstractPlottable1D.

If subclassing QCPAbstractPlottable directly, these are the pure virtual functions you must implement:

• selectTest
• draw
• drawLegendIcon
• getKeyRange
• getValueRange

See the documentation of those functions for what they need to do.

For drawing your plot, you can use the coordsToPixels functions to translate a point in plot coordinates to pixel coordinates. This function is quite convenient, because it takes the orientation of the key and value axes into account for you (x and y are swapped when the key axis is vertical and the value axis horizontal). If you are worried about performance (i.e. you need to translate many points in a loop like QCPGraph), you can directly use QCPAxis::coordToPixel. However, you must then take care about the orientation of the axis yourself.

Here are some important members you inherit from QCPAbstractPlottable:

QCustomPlot *mParentPlot	A pointer to the parent QCustomPlot instance. The parent plot is inferred from the axes that are passed in the constructor.
QString mName	The name of the plottable.
QPen mPen	The generic pen of the plottable. You should use this pen for the most prominent data representing lines in the plottable (e.g QCPGraph uses this pen for its graph lines and scatters)
QBrush mBrush	The generic brush of the plottable. You should use this brush for the most prominent fillable structures in the plottable (e.g. QCPGraph uses this brush to control filling under the graph)
QPointer<QCPAxis> mKeyAxis, mValueAxis	The key and value axes this plottable is attached to. Call their QCPAxis::coordToPixel functions to translate coordinates to pixels in either the key or value dimension. Make sure to check whether the pointer is nullptr before using it. If one of the axes is null, don't draw the plottable.
QCPSelectionDecorator mSelectionDecorator	The currently set selection decorator which specifies how selected data of the plottable shall be drawn and decorated. When drawing your data, you must consult this decorator for the appropriate pen/brush before drawing unselected/selected data segments. Finally, you should call its QCPSelectionDecorator::drawDecoration method at the end of your draw implementation.
QCP::SelectionType mSelectable	In which composition, if at all, this plottable's data may be selected. Enforcing this setting on the data selection is done by QCPAbstractPlottable automatically.
QCPDataSelection mSelection	Holds the current selection state of the plottable's data, i.e. the selected data ranges (QCPDataRange).

Definition at line 3436 of file qcustomplot.h.

Constructor & Destructor Documentation

QCPAbstractPlottable()

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

Constructs an abstract plottable 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 have perpendicular orientations. If either of these restrictions is violated, a corresponding message is printed to the debug output (qDebug), the construction is not aborted, though.

Since QCPAbstractPlottable is an abstract class that defines the basic interface to plottables, it can't be directly instantiated.

You probably want one of the subclasses like QCPGraph or QCPCurve instead.

Definition at line 11402 of file qcustomplot.cpp.

~QCPAbstractPlottable()

QCPAbstractPlottable::~QCPAbstractPlottable ( )

overridevirtual

Definition at line 11423 of file qcustomplot.cpp.

Member Function Documentation

addToLegend() [1/2]

bool QCPAbstractPlottable::addToLegend

(

)

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

Adds this plottable to the legend of the parent QCustomPlot (QCustomPlot::legend).

See also

removeFromLegend

Definition at line 11821 of file qcustomplot.cpp.

addToLegend() [2/2]

bool QCPAbstractPlottable::addToLegend

(

QCPLegend *

legend

)

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

Adds this plottable to the specified legend.

Creates a QCPPlottableLegendItem which is inserted into the legend. Returns true on success, i.e. when the legend exists and a legend item associated with this plottable isn't already in the legend.

If the plottable needs a more specialized representation in the legend, you can create a corresponding subclass of QCPPlottableLegendItem and add it to the legend manually instead of calling this method.

See also

removeFromLegend, QCPLegend::addItem

Definition at line 11794 of file qcustomplot.cpp.

antialiasedFill()

bool QCPAbstractPlottable::antialiasedFill ( ) const

inline

Definition at line 3457 of file qcustomplot.h.

antialiasedScatters()

bool QCPAbstractPlottable::antialiasedScatters ( ) const

inline

Definition at line 3458 of file qcustomplot.h.

applyDefaultAntialiasingHint()

void QCPAbstractPlottable::applyDefaultAntialiasingHint ( QCPPainter * painter ) const

overrideprotectedvirtual

A convenience function to easily set the QPainter::Antialiased hint on the provided painter before drawing plottable lines.

This is the antialiasing state the painter passed to the draw method is in by default.

This function takes into account the local setting of the antialiasing flag as well as the overrides set with QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

\seebaseclassmethod

See also

setAntialiased, applyFillAntialiasingHint, applyScattersAntialiasingHint

Implements QCPLayerable.

Definition at line 11897 of file qcustomplot.cpp.

applyFillAntialiasingHint()

void QCPAbstractPlottable::applyFillAntialiasingHint ( QCPPainter * painter ) const

protected

A convenience function to easily set the QPainter::Antialiased hint on the provided painter before drawing plottable fills.

This function takes into account the local setting of the antialiasing flag as well as the overrides set with QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

See also

setAntialiased, applyDefaultAntialiasingHint, applyScattersAntialiasingHint

Definition at line 11913 of file qcustomplot.cpp.

applyScattersAntialiasingHint()

void QCPAbstractPlottable::applyScattersAntialiasingHint ( QCPPainter * painter ) const

protected

A convenience function to easily set the QPainter::Antialiased hint on the provided painter before drawing plottable scatter points.

This function takes into account the local setting of the antialiasing flag as well as the overrides set with QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

See also

setAntialiased, applyFillAntialiasingHint, applyDefaultAntialiasingHint

Definition at line 11929 of file qcustomplot.cpp.

brush()

QBrush QCPAbstractPlottable::brush ( ) const

inline

Definition at line 3460 of file qcustomplot.h.

clipRect()

QRect QCPAbstractPlottable::clipRect ( ) const

overrideprotectedvirtual

Returns the clipping rectangle of this layerable object. By default, this is the viewport of the parent QCustomPlot. Specific subclasses may reimplement this function to provide different clipping rects.

The returned clipping rect is set on the painter before the draw function of the respective object is called.

Reimplemented from QCPLayerable.

Definition at line 11868 of file qcustomplot.cpp.

coordsToPixels() [1/2]

const QPointF QCPAbstractPlottable::coordsToPixels	(	double	key,
		double	value ) const

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

Transforms the given key and value to pixel coordinates and returns them in a QPointF.

Definition at line 11634 of file qcustomplot.cpp.

coordsToPixels() [2/2]

void QCPAbstractPlottable::coordsToPixels	(	double	key,
		double	value,
		double &	x,
		double &	y ) const

Convenience function for transforming a key/value pair to pixels on the QCustomPlot surface, taking the orientations of the axes associated with this plottable into account (e.g. whether key represents x or y).

key and value are transformed to the coodinates in pixels and are written to x and y.

See also

pixelsToCoords, QCPAxis::coordToPixel

Definition at line 11613 of file qcustomplot.cpp.

deselectEvent()

void QCPAbstractPlottable::deselectEvent ( bool * selectionStateChanged )

overrideprotectedvirtual

This event is called when the layerable shall be deselected, either as consequence of a user interaction or a call to QCustomPlot::deselectAll. Subclasses should react to it by unsetting their selection appropriately.

just as in selectEvent, the output parameter selectionStateChanged (if non-null), must return true or false when the selection state of this layerable has changed or not changed, respectively.

See also

selectTest, selectEvent

Reimplemented from QCPLayerable.

Definition at line 11966 of file qcustomplot.cpp.

draw()

virtual void QCPAbstractPlottable::draw ( QCPPainter * painter )

overrideprotectedpure virtual

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 QCPLayerable.

Implemented in QCPGraph, QCPCurve, QCPBars, QCPStatisticalBox, QCPColorMap, QCPFinancial, and QCPErrorBars.

drawLegendIcon()

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

protectedpure virtual

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

The passed painter has its cliprect set to rect, so painting outside of rect won't appear outside the legend icon border.

Implemented in QCPGraph, QCPCurve, QCPBars, QCPStatisticalBox, QCPColorMap, QCPFinancial, and QCPErrorBars.

getKeyRange()

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

pure virtual

Returns the coordinate range that all data in this plottable span in the key axis dimension. For logarithmic plots, one can set inSignDomain to either QCP::sdNegative or QCP::sdPositive in order to restrict the returned range to that sign domain. E.g. when only negative range is wanted, set inSignDomain to QCP::sdNegative and all positive points will be ignored for range calculation. For no restriction, just set inSignDomain to QCP::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 (e.g. when there is only one data point). In this case foundRange would return true, but the returned range is not a valid range in terms of QCPRange::validRange.

See also

rescaleAxes, getValueRange

Implemented in QCPGraph, QCPCurve, QCPBars, QCPStatisticalBox, QCPColorMap, QCPFinancial, and QCPErrorBars.

getValueRange()

QCPRange QCPAbstractPlottable::getValueRange ( bool & foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth, const QCPRange & inKeyRange = QCPRange() ) const

pure virtual

Returns the coordinate range that the data points in the specified key range (inKeyRange) span in the value axis dimension. For logarithmic plots, one can set inSignDomain to either QCP::sdNegative or QCP::sdPositive in order to restrict the returned range to that sign domain. E.g. when only negative range is wanted, set inSignDomain to QCP::sdNegative and all positive points will be ignored for range calculation. For no restriction, just set inSignDomain to QCP::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).

If inKeyRange has both lower and upper bound set to zero (is equal to QCPRange()), all data points are considered, without any restriction on the keys.

Note that foundRange is not the same as QCPRange::validRange, since the range returned by this function may have size zero (e.g. when there is only one data point). In this case foundRange would return true, but the returned range is not a valid range in terms of QCPRange::validRange.

See also

rescaleAxes, getKeyRange

Implemented in QCPGraph, QCPCurve, QCPBars, QCPStatisticalBox, QCPColorMap, QCPFinancial, and QCPErrorBars.

interface1D()

QCPPlottableInterface1D * QCPAbstractPlottable::interface1D ( )

inlinevirtual

If this plottable is a one-dimensional plottable, i.e. it implements the QCPPlottableInterface1D, returns the this pointer with that type. Otherwise (e.g. in the case of a QCPColorMap) returns zero.

You can use this method to gain read access to data coordinates while holding a pointer to the abstract base class only.

Reimplemented in QCPAbstractPlottable1D< DataType >, QCPAbstractPlottable1D< QCPBarsData >, QCPAbstractPlottable1D< QCPCurveData >, QCPAbstractPlottable1D< QCPFinancialData >, QCPAbstractPlottable1D< QCPGraphData >, QCPAbstractPlottable1D< QCPStatisticalBoxData >, and QCPErrorBars.

Definition at line 3482 of file qcustomplot.h.

keyAxis()

QCPAxis * QCPAbstractPlottable::keyAxis ( ) const

inline

Definition at line 3461 of file qcustomplot.h.

name()

QString QCPAbstractPlottable::name ( ) const

inline

Definition at line 3456 of file qcustomplot.h.

pen()

QPen QCPAbstractPlottable::pen ( ) const

inline

Definition at line 3459 of file qcustomplot.h.

pixelsToCoords() [1/2]

void QCPAbstractPlottable::pixelsToCoords	(	const QPointF &	pixelPos,
		double &	key,
		double &	value ) const

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

Returns the pixel input pixelPos as plot coordinates key and value.

Definition at line 11676 of file qcustomplot.cpp.

pixelsToCoords() [2/2]

void QCPAbstractPlottable::pixelsToCoords	(	double	x,
		double	y,
		double &	key,
		double &	value ) const

Convenience function for transforming a x/y pixel pair on the QCustomPlot surface to plot coordinates, taking the orientations of the axes associated with this plottable into account (e.g. whether key represents x or y).

x and y are transformed to the plot coodinates and are written to key and value.

See also

coordsToPixels, QCPAxis::coordToPixel

Definition at line 11655 of file qcustomplot.cpp.

removeFromLegend() [1/2]

bool QCPAbstractPlottable::removeFromLegend

(

)

const

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

Removes the plottable from the legend of the parent QCustomPlot.

See also

addToLegend

Definition at line 11859 of file qcustomplot.cpp.

removeFromLegend() [2/2]

bool QCPAbstractPlottable::removeFromLegend

(

QCPLegend *

legend

)

const

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

Removes the plottable from the specifed legend. This means the QCPPlottableLegendItem that is associated with this plottable is removed.

Returns true on success, i.e. if the legend exists and a legend item associated with this plottable was found and removed.

See also

addToLegend, QCPLegend::removeItem

Definition at line 11839 of file qcustomplot.cpp.

rescaleAxes()

void QCPAbstractPlottable::rescaleAxes

(

bool

onlyEnlarge = false

)

const

Rescales the key and value axes associated with this plottable to contain all displayed data, so the whole plottable is visible. If the scaling of an axis is logarithmic, rescaleAxes will make sure not to rescale to an illegal range i.e. a range containing different signs and/or zero. Instead it will stay in the current sign domain and ignore all parts of the plottable that lie outside of that domain.

onlyEnlarge makes sure the ranges are only expanded, never reduced. So it's possible to show multiple plottables in their entirety by multiple calls to rescaleAxes where the first call has onlyEnlarge set to false (the default), and all subsequent set to true.

See also

rescaleKeyAxis, rescaleValueAxis, QCustomPlot::rescaleAxes, QCPAxis::rescale

Definition at line 11694 of file qcustomplot.cpp.

rescaleKeyAxis()

void QCPAbstractPlottable::rescaleKeyAxis

(

bool

onlyEnlarge = false

)

const

Rescales the key axis of the plottable so the whole plottable is visible.

See rescaleAxes for detailed behaviour.

Definition at line 11705 of file qcustomplot.cpp.

rescaleValueAxis()

void QCPAbstractPlottable::rescaleValueAxis	(	bool	onlyEnlarge = false,
		bool	inKeyRange = false ) const

Rescales the value axis of the plottable so the whole plottable is visible. If inKeyRange is set to true, only the data points which are in the currently visible key axis range are considered.

Returns true if the axis was actually scaled. This might not be the case if this plottable has an invalid range, e.g. because it has no data points.

See rescaleAxes for detailed behaviour.

Definition at line 11747 of file qcustomplot.cpp.

selectable()

QCP::SelectionType QCPAbstractPlottable::selectable ( ) const

inline

Definition at line 3463 of file qcustomplot.h.

selectableChanged

void QCPAbstractPlottable::selectableChanged ( QCP::SelectionType selectable )

signal

This signal is emitted when the selectability of this plottable has changed.

See also

setSelectable

selected()

bool QCPAbstractPlottable::selected ( ) const

inline

Returns true if there are any data points of the plottable currently selected. Use selection to retrieve the current QCPDataSelection.

Definition at line 3464 of file qcustomplot.h.

selectEvent()

void QCPAbstractPlottable::selectEvent ( QMouseEvent * event, bool additive, const QVariant & details, bool * selectionStateChanged )

overrideprotectedvirtual

This event is called when the layerable shall be selected, as a consequence of a click by the user. Subclasses should react to it by setting their selection state appropriately. The default implementation does nothing.

event is the mouse event that caused the selection. additive indicates, whether the user was holding the multi-select-modifier while performing the selection (see QCustomPlot::setMultiSelectModifier). if additive is true, the selection state must be toggled (i.e. become selected when unselected and unselected when selected).

Every selectEvent is preceded by a call to selectTest, which has returned positively (i.e. returned a value greater than 0 and less than the selection tolerance of the parent QCustomPlot). The details data you output from selectTest is fed back via details here. You may use it to transport any kind of information from the selectTest to the possibly subsequent selectEvent. Usually details is used to transfer which part was clicked, if it is a layerable that has multiple individually selectable parts (like QCPAxis). This way selectEvent doesn't need to do the calculation again to find out which part was actually clicked.

selectionStateChanged is an output parameter. If the pointer is non-null, this function must set the value either to true or false, depending on whether the selection state of this layerable was actually changed. For layerables that only are selectable as a whole and not in parts, this is simple: if additive is true, selectionStateChanged must also be set to true, because the selection toggles. If additive is false, selectionStateChanged is only set to true, if the layerable was previously unselected and now is switched to the selected state.

See also

selectTest, deselectEvent

Reimplemented from QCPLayerable.

Definition at line 11935 of file qcustomplot.cpp.

selection()

QCPDataSelection QCPAbstractPlottable::selection ( ) const

inline

Returns a QCPDataSelection encompassing all the data points that are currently selected on this plottable.

See also

selected, setSelection, setSelectable

Definition at line 3465 of file qcustomplot.h.

selectionCategory()

QCP::Interaction QCPAbstractPlottable::selectionCategory ( ) const

overrideprotectedvirtual

Returns the selection category this layerable shall belong to. The selection category is used in conjunction with QCustomPlot::setInteractions to control which objects are selectable and which aren't.

Subclasses that don't fit any of the normal QCP::Interaction values can use QCP::iSelectOther. This is what the default implementation returns.

See also

QCustomPlot::setInteractions

Reimplemented from QCPLayerable.

Definition at line 11877 of file qcustomplot.cpp.

selectionChanged [1/2]

void QCPAbstractPlottable::selectionChanged ( bool selected )

signal

This signal is emitted when the selection state of this plottable has changed, either by user interaction or by a direct call to setSelection. The parameter selected indicates whether there are any points selected or not.

See also

selectionChanged(const QCPDataSelection &selection)

selectionChanged [2/2]

void QCPAbstractPlottable::selectionChanged ( const QCPDataSelection & selection )

signal

This signal is emitted when the selection state of this plottable has changed, either by user interaction or by a direct call to setSelection. The parameter selection holds the currently selected data ranges.

See also

selectionChanged(bool selected)

selectionDecorator()

QCPSelectionDecorator * QCPAbstractPlottable::selectionDecorator ( ) const

inline

Provides access to the selection decorator of this plottable. The selection decorator controls how selected data ranges are drawn (e.g. their pen color and fill), see QCPSelectionDecorator for details.

If you wish to use an own QCPSelectionDecorator subclass, pass an instance of it to setSelectionDecorator.

Definition at line 3466 of file qcustomplot.h.

selectTest()

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

overridepure 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.

In the case of 1D Plottables (QCPAbstractPlottable1D, like QCPGraph or QCPBars) details will be set to a QCPDataSelection, describing the closest data point to pos.

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

See also

selectEvent, deselectEvent, mousePressEvent, wheelEvent, QCustomPlot::setInteractions, QCPAbstractPlottable1D::selectTestRect

Reimplemented from QCPLayerable.

Implemented in QCPAbstractPlottable1D< DataType >, QCPAbstractPlottable1D< QCPBarsData >, QCPAbstractPlottable1D< QCPCurveData >, QCPAbstractPlottable1D< QCPFinancialData >, QCPAbstractPlottable1D< QCPGraphData >, QCPAbstractPlottable1D< QCPStatisticalBoxData >, QCPGraph, QCPCurve, QCPBars, QCPStatisticalBox, QCPColorMap, QCPFinancial, and QCPErrorBars.

setAntialiasedFill()

void QCPAbstractPlottable::setAntialiasedFill

(

bool

enabled

)

Sets whether fills of this plottable are drawn antialiased or not.

Note that this setting may be overridden by QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

Definition at line 11447 of file qcustomplot.cpp.

setAntialiasedScatters()

void QCPAbstractPlottable::setAntialiasedScatters

(

bool

enabled

)

Sets whether the scatter symbols of this plottable are drawn antialiased or not.

Note that this setting may be overridden by QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

Definition at line 11458 of file qcustomplot.cpp.

setBrush()

void QCPAbstractPlottable::setBrush

(

const QBrush &

brush

)

The brush is used to draw basic fills of the plottable representation in the plot. The Fill can be a color, gradient or texture, see the usage of QBrush.

For example, the QCPGraph subclass draws the fill under the graph with this brush, when it's not set to Qt::NoBrush.

See also

setPen

Definition at line 11485 of file qcustomplot.cpp.

setKeyAxis()

void QCPAbstractPlottable::setKeyAxis

(

QCPAxis *

axis

)

The key axis of a plottable can be set to any axis of a QCustomPlot, as long as it is orthogonal to the plottable's value axis. This function performs no checks to make sure this is the case. The typical mathematical choice is to use the x-axis (QCustomPlot::xAxis) as key axis and the y-axis (QCustomPlot::yAxis) as value axis.

Normally, the key and value axes are set in the constructor of the plottable (or QCustomPlot::addGraph when working with QCPGraphs through the dedicated graph interface).

See also

setValueAxis

Definition at line 11501 of file qcustomplot.cpp.

setName()

void QCPAbstractPlottable::setName

(

const QString &

name

)

The name is the textual representation of this plottable as it is displayed in the legend (QCPLegend). It may contain any UTF-8 characters, including newlines.

Definition at line 11436 of file qcustomplot.cpp.

setPen()

void QCPAbstractPlottable::setPen

(

const QPen &

pen

)

The pen is used to draw basic lines that make up the plottable representation in the plot.

For example, the QCPGraph subclass draws its graph lines with this pen.

See also

setBrush

Definition at line 11471 of file qcustomplot.cpp.

setSelectable()

void QCPAbstractPlottable::setSelectable

(

QCP::SelectionType

selectable

)

Sets whether and to which granularity this plottable can be selected.

A selection can happen by clicking on the QCustomPlot surface (When QCustomPlot::setInteractions contains QCP::iSelectPlottables), by dragging a selection rect (When QCustomPlot::setSelectionRectMode is QCP::srmSelect), or programmatically by calling setSelection.

See also

setSelection, QCP::SelectionType

Definition at line 11587 of file qcustomplot.cpp.

setSelection()

void QCPAbstractPlottable::setSelection

(

QCPDataSelection

selection

)

Sets which data ranges of this plottable are selected. Selected data ranges are drawn differently (e.g. color) in the plot. This can be controlled via the selection decorator (see selectionDecorator).

The entire selection mechanism for plottables is handled automatically when QCustomPlot::setInteractions contains iSelectPlottables. You only need to call this function when you wish to change the selection state programmatically.

Using setSelectable you can further specify for each plottable whether and to which granularity it is selectable. If selection is not compatible with the current QCP::SelectionType set via setSelectable, the resulting selection will be adjusted accordingly (see QCPDataSelection::enforceType).

emits the selectionChanged signal when selected is different from the previous selection state.

See also

setSelectable, selectTest

Definition at line 11541 of file qcustomplot.cpp.

setSelectionDecorator()

void QCPAbstractPlottable::setSelectionDecorator

(

QCPSelectionDecorator *

decorator

)

Use this method to set an own QCPSelectionDecorator (subclass) instance. This allows you to customize the visual representation of selected data ranges further than by using the default QCPSelectionDecorator.

The plottable takes ownership of the decorator.

The currently set decorator can be accessed via selectionDecorator.

Definition at line 11561 of file qcustomplot.cpp.

setValueAxis()

void QCPAbstractPlottable::setValueAxis

(

QCPAxis *

axis

)

The value axis of a plottable can be set to any axis of a QCustomPlot, as long as it is orthogonal to the plottable's key axis. This function performs no checks to make sure this is the case. The typical mathematical choice is to use the x-axis (QCustomPlot::xAxis) as key axis and the y-axis (QCustomPlot::yAxis) as value axis.

Normally, the key and value axes are set in the constructor of the plottable (or QCustomPlot::addGraph when working with QCPGraphs through the dedicated graph interface).

See also

setKeyAxis

Definition at line 11517 of file qcustomplot.cpp.

valueAxis()

QCPAxis * QCPAbstractPlottable::valueAxis ( ) const

inline

Definition at line 3462 of file qcustomplot.h.

Member Data Documentation

mAntialiasedFill

bool QCPAbstractPlottable::mAntialiasedFill

protected

Definition at line 3507 of file qcustomplot.h.

mAntialiasedScatters

bool QCPAbstractPlottable::mAntialiasedScatters

protected

Definition at line 3507 of file qcustomplot.h.

mBrush

QBrush QCPAbstractPlottable::mBrush

protected

Definition at line 3509 of file qcustomplot.h.

mKeyAxis

QPointer<QCPAxis> QCPAbstractPlottable::mKeyAxis

protected

Definition at line 3510 of file qcustomplot.h.

mName

QString QCPAbstractPlottable::mName

protected

Definition at line 3506 of file qcustomplot.h.

mPen

QPen QCPAbstractPlottable::mPen

protected

Definition at line 3508 of file qcustomplot.h.

mSelectable

QCP::SelectionType QCPAbstractPlottable::mSelectable

protected

Definition at line 3511 of file qcustomplot.h.

mSelection

QCPDataSelection QCPAbstractPlottable::mSelection

protected

Definition at line 3512 of file qcustomplot.h.

mSelectionDecorator

QCPSelectionDecorator* QCPAbstractPlottable::mSelectionDecorator

protected

Definition at line 3513 of file qcustomplot.h.

mValueAxis

QPointer<QCPAxis> QCPAbstractPlottable::mValueAxis

protected

Definition at line 3510 of file qcustomplot.h.

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

• qcustomplot.h
• qcustomplot.cpp