QCPItemCurve

Inheritance diagram for QCPItemCurve:

[legend]

Public Member Functions
	QCPItemCurve (QCustomPlot *parentPlot)

QCPLineEnding	head () const

QPen	pen () const

QPen	selectedPen () const

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

void	setHead (const QCPLineEnding &head)

void	setPen (const QPen &pen)

void	setSelectedPen (const QPen &pen)

void	setTail (const QCPLineEnding &tail)

QCPLineEnding	tail () const

Public Member Functions inherited from QCPAbstractItem
	QCPAbstractItem (QCustomPlot *parentPlot)

QCPItemAnchor *	anchor (const QString &name) const

QList< QCPItemAnchor * >	anchors () const

QCPAxisRect *	clipAxisRect () const

bool	clipToAxisRect () const

bool	hasAnchor (const QString &name) const

QCPItemPosition *	position (const QString &name) const

QList< QCPItemPosition * >	positions () const

bool	selectable () const

bool	selected () const

void	setClipAxisRect (QCPAxisRect *rect)

void	setClipToAxisRect (bool clip)

Q_SLOT void	setSelectable (bool selectable)

Q_SLOT void	setSelected (bool selected)

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

Public Attributes
QCPItemPosition *const	end

QCPItemPosition *const	endDir

QCPItemPosition *const	start

QCPItemPosition *const	startDir

Protected Member Functions
virtual void	draw (QCPPainter *painter) override

QPen	mainPen () const

Protected Member Functions inherited from QCPAbstractItem
virtual QPointF	anchorPixelPosition (int anchorId) const

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const override

virtual QRect	clipRect () const override

QCPItemAnchor *	createAnchor (const QString &name, int anchorId)

QCPItemPosition *	createPosition (const QString &name)

virtual void	deselectEvent (bool *selectionStateChanged) override

double	rectDistance (const QRectF &rect, const QPointF &pos, bool filledRect) const

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
QCPLineEnding	mHead

QPen	mPen

QPen	mSelectedPen

QCPLineEnding	mTail

Protected Attributes inherited from QCPAbstractItem
QList< QCPItemAnchor * >	mAnchors

QPointer< QCPAxisRect >	mClipAxisRect

bool	mClipToAxisRect

QList< QCPItemPosition * >	mPositions

bool	mSelectable

bool	mSelected

Protected Attributes inherited from QCPLayerable
bool	mAntialiased

QCPLayer *	mLayer

QPointer< QCPLayerable >	mParentLayerable

QCustomPlot *	mParentPlot

bool	mVisible

Additional Inherited Members
Public Types inherited from QObject
typedef	QObjectList

Properties inherited from QObject
	objectName

Signals inherited from QCPAbstractItem
void	selectableChanged (bool selectable)

void	selectionChanged (bool selected)

Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

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)

Detailed Description

A curved line from one point to another.

Curve example. Blue dotted circles are anchors, solid blue discs are positions.

It has four positions, start and end, which define the end points of the line, and two control points which define the direction the line exits from the start and the direction from which it approaches the end: startDir and endDir.

With setHead and setTail you may set different line ending styles, e.g. to create an arrow.

Often it is desirable for the control points to stay at fixed relative positions to the start/end point. This can be achieved by setting the parent anchor e.g. of startDir simply to start, and then specify the desired pixel offset with QCPItemPosition::setCoords on startDir.

Definition at line 6515 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPItemCurve()

QCPItemCurve::QCPItemCurve ( QCustomPlot * parentPlot )

explicit

Creates a curve item and sets default values.

The created item is automatically registered with parentPlot. This QCustomPlot instance takes ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.

Definition at line 29296 of file qcustomplot.cpp.

◆ ~QCPItemCurve()

QCPItemCurve::~QCPItemCurve ( )

overridevirtual

Definition at line 29312 of file qcustomplot.cpp.

Member Function Documentation

◆ draw()

void QCPItemCurve::draw ( QCPPainter * painter )

overrideprotectedvirtual

Draws this item with the provided painter.

The cliprect of the provided painter is set to the rect returned by clipRect before this function is called. The clipRect depends on the clipping settings defined by setClipToAxisRect and setClipAxisRect.

Implements QCPAbstractItem.

Definition at line 29393 of file qcustomplot.cpp.

◆ head()

QCPLineEnding QCPItemCurve::head ( ) const

inline

Definition at line 6531 of file qcustomplot.h.

◆ mainPen()

QPen QCPItemCurve::mainPen ( ) const

protected

Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected and mSelectedPen when it is.

Definition at line 29428 of file qcustomplot.cpp.

◆ pen()

QPen QCPItemCurve::pen ( ) const

inline

Definition at line 6529 of file qcustomplot.h.

◆ selectedPen()

QPen QCPItemCurve::selectedPen ( ) const

inline

Definition at line 6530 of file qcustomplot.h.

◆ selectTest()

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

overridevirtual

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

Implements QCPAbstractItem.

Definition at line 29363 of file qcustomplot.cpp.

◆ setHead()

void QCPItemCurve::setHead ( const QCPLineEnding & head )

Sets the line ending style of the head. The head corresponds to the end position.

Note that due to the overloaded QCPLineEnding constructor, you may directly specify a QCPLineEnding::EndingStyle here, e.g.

setHead(QCPLineEnding::esSpikeArrow)

QCPItemCurve::setHead

void setHead(const QCPLineEnding &head)

Definition qcustomplot.cpp:29344

QCPLineEnding::esSpikeArrow

@ esSpikeArrow

A filled arrow head with an indented back.

Definition qcustomplot.h:1545

See also: setTail

Definition at line 29344 of file qcustomplot.cpp.

◆ setPen()

void QCPItemCurve::setPen ( const QPen & pen )

Sets the pen that will be used to draw the line

See also: setSelectedPen

Definition at line 29321 of file qcustomplot.cpp.

◆ setSelectedPen()

void QCPItemCurve::setSelectedPen ( const QPen & pen )

Sets the pen that will be used to draw the line when selected

See also: setPen, setSelected

Definition at line 29331 of file qcustomplot.cpp.

◆ setTail()

void QCPItemCurve::setTail ( const QCPLineEnding & tail )

Sets the line ending style of the tail. The tail corresponds to the start position.

Note that due to the overloaded QCPLineEnding constructor, you may directly specify a QCPLineEnding::EndingStyle here, e.g.

setTail(QCPLineEnding::esSpikeArrow)

QCPItemCurve::setTail

void setTail(const QCPLineEnding &tail)

Definition qcustomplot.cpp:29357

See also: setHead

Definition at line 29357 of file qcustomplot.cpp.

◆ tail()

QCPLineEnding QCPItemCurve::tail ( ) const

inline

Definition at line 6532 of file qcustomplot.h.

Member Data Documentation

◆ end

QCPItemPosition* const QCPItemCurve::end

Definition at line 6546 of file qcustomplot.h.

◆ endDir

QCPItemPosition* const QCPItemCurve::endDir

Definition at line 6545 of file qcustomplot.h.

◆ mHead

QCPLineEnding QCPItemCurve::mHead

protected

Definition at line 6551 of file qcustomplot.h.

◆ mPen

QPen QCPItemCurve::mPen

protected

Definition at line 6550 of file qcustomplot.h.

◆ mSelectedPen

QPen QCPItemCurve::mSelectedPen

protected

Definition at line 6550 of file qcustomplot.h.

◆ mTail

QCPLineEnding QCPItemCurve::mTail

protected

Definition at line 6551 of file qcustomplot.h.

◆ start

QCPItemPosition* const QCPItemCurve::start

Definition at line 6543 of file qcustomplot.h.

◆ startDir

QCPItemPosition* const QCPItemCurve::startDir

Definition at line 6544 of file qcustomplot.h.

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

KDE's Doxygen guidelines are available online.

Class Picker

Quick Links

About Kstars

QCPItemCurve

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QCPItemCurve()

◆ ~QCPItemCurve()

Member Function Documentation

◆ draw()

◆ head()

◆ mainPen()

◆ pen()

◆ selectedPen()

◆ selectTest()

◆ setHead()

◆ setPen()

◆ setSelectedPen()

◆ setTail()

◆ tail()

Member Data Documentation

◆ end

◆ endDir

◆ mHead

◆ mPen

◆ mSelectedPen

◆ mTail

◆ start

◆ startDir