A curved line from one point to another. More...

#include <qcustomplot.h>

Inheritance diagram for QCPItemCurve:

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Collaboration diagram for QCPItemCurve:

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Public Member Functions
	QCPItemCurve (QCustomPlot *parentPlot)

virtual	~QCPItemCurve ()

QPen	pen () const

QPen	selectedPen () const

QCPLineEnding	head () const

QCPLineEnding	tail () const

void	setPen (const QPen &pen)

void	setSelectedPen (const QPen &pen)

void	setHead (const QCPLineEnding &head)

void	setTail (const QCPLineEnding &tail)

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

	QCPItemCurve (QCustomPlot *parentPlot)

virtual	~QCPItemCurve ()

QPen	pen () const

QPen	selectedPen () const

QCPLineEnding	head () const

QCPLineEnding	tail () const

void	setPen (const QPen &pen)

void	setSelectedPen (const QPen &pen)

void	setHead (const QCPLineEnding &head)

void	setTail (const QCPLineEnding &tail)

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

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

virtual	~QCPAbstractItem ()

bool	clipToAxisRect () const

QCPAxisRect *	clipAxisRect () const

bool	selectable () const

bool	selected () const

void	setClipToAxisRect (bool clip)

void	setClipAxisRect (QCPAxisRect *rect)

Q_SLOT void	setSelectable (bool selectable)

Q_SLOT void	setSelected (bool selected)

QList< QCPItemPosition * >	positions () const

QList< QCPItemAnchor * >	anchors () const

QCPItemPosition *	position (const QString &name) const

QCPItemAnchor *	anchor (const QString &name) const

bool	hasAnchor (const QString &name) const

	QCPAbstractItem (QCustomPlot *parentPlot)

virtual	~QCPAbstractItem ()

bool	clipToAxisRect () const

QCPAxisRect *	clipAxisRect () const

bool	selectable () const

bool	selected () const

void	setClipToAxisRect (bool clip)

void	setClipAxisRect (QCPAxisRect *rect)

Q_SLOT void	setSelectable (bool selectable)

Q_SLOT void	setSelected (bool selected)

QList< QCPItemPosition * >	positions () const

QList< QCPItemAnchor * >	anchors () const

QCPItemPosition *	position (const QString &name) const

QCPItemAnchor *	anchor (const QString &name) const

bool	hasAnchor (const QString &name) const

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

virtual	~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

	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

Public Attributes
QCPItemPosition *const	start

QCPItemPosition *const	startDir

QCPItemPosition *const	endDir

QCPItemPosition *const	end

Protected Member Functions
virtual void	draw (QCPPainter *painter)

QPen	mainPen () const

virtual void	draw (QCPPainter *painter)

QPen	mainPen () const

Protected Member Functions inherited from QCPAbstractItem
virtual QCP::Interaction	selectionCategory () const

virtual QRect	clipRect () const

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const

virtual void	selectEvent (QMouseEvent event, bool additive, const QVariant &details, bool selectionStateChanged)

virtual void	deselectEvent (bool *selectionStateChanged)

virtual QPointF	anchorPixelPosition (int anchorId) const

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

QCPItemPosition *	createPosition (const QString &name)

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

virtual QCP::Interaction	selectionCategory () const

virtual QRect	clipRect () const

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const

virtual void	selectEvent (QMouseEvent event, bool additive, const QVariant &details, bool selectionStateChanged)

virtual void	deselectEvent (bool *selectionStateChanged)

virtual QPointF	anchorPixelPoint (int anchorId) const

double	distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const

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

QCPItemPosition *	createPosition (const QString &name)

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

Protected Member Functions inherited from QCPLayerable
virtual void	parentPlotInitialized (QCustomPlot *parentPlot)

virtual void	mousePressEvent (QMouseEvent *event, const QVariant &details)

virtual void	mouseMoveEvent (QMouseEvent *event, const QPointF &startPos)

virtual void	mouseReleaseEvent (QMouseEvent *event, const QPointF &startPos)

virtual void	mouseDoubleClickEvent (QMouseEvent *event, const QVariant &details)

virtual void	wheelEvent (QWheelEvent *event)

void	initializeParentPlot (QCustomPlot *parentPlot)

void	setParentLayerable (QCPLayerable *parentLayerable)

bool	moveToLayer (QCPLayer *layer, bool prepend)

void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

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
QPen	mPen

QPen	mSelectedPen

QCPLineEnding	mHead

QCPLineEnding	mTail

Protected Attributes inherited from QCPAbstractItem
bool	mClipToAxisRect

QPointer< QCPAxisRect >	mClipAxisRect

QList< QCPItemPosition * >	mPositions

QList< QCPItemAnchor * >	mAnchors

bool	mSelectable

bool	mSelected

Protected Attributes inherited from QCPLayerable
bool	mVisible

QCustomPlot *	mParentPlot

QPointer< QCPLayerable >	mParentLayerable

QCPLayer *	mLayer

bool	mAntialiased

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

void	selectableChanged (bool selectable)

void	selectionChanged (bool selected)

void	selectableChanged (bool selectable)

Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

void	layerChanged (QCPLayer *newLayer)

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 7319 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPItemCurve() [1/2]

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.

Creates a curve item and sets default values.

The constructed item can be added to the plot with QCustomPlot::addItem.

Definition at line 30403 of file qcustomplot.cpp.

References ecvColor::black(), ecvColor::blue(), end, endDir, QCPItemPosition::setCoords(), setPen(), setSelectedPen(), start, and startDir.

◆ ~QCPItemCurve() [1/2]

QCPItemCurve::~QCPItemCurve ( )

virtual

Definition at line 30418 of file qcustomplot.cpp.

◆ QCPItemCurve() [2/2]

QCPItemCurve::QCPItemCurve ( QCustomPlot * parentPlot )

◆ ~QCPItemCurve() [2/2]

virtual QCPItemCurve::~QCPItemCurve ( )

virtual

Member Function Documentation

◆ draw() [1/2]

void QCPItemCurve::draw ( QCPPainter * painter )

protectedvirtual

Implements QCPAbstractItem.

Definition at line 30487 of file qcustomplot.cpp.

References QCPAbstractItem::clipRect(), QCPLineEnding::draw(), end, endDir, QCPLineEnding::esNone, M_PI, mainPen(), mHead, mTail, QCPItemPosition::pixelPosition(), QCPPainter::setPen(), start, startDir, QCPLineEnding::style(), and QCPVector2D::toPointF().

◆ draw() [2/2]

virtual void QCPItemCurve::draw ( QCPPainter * painter )

protectedvirtual

Implements QCPAbstractItem.

◆ head() [1/2]

QCPLineEnding QCPItemCurve::head ( ) const

inline

Definition at line 7334 of file qcustomplot.h.

Referenced by setHead().

◆ head() [2/2]

QCPLineEnding QCPItemCurve::head ( ) const

inline

Definition at line 3988 of file qcustomplot.h.

◆ mainPen() [1/2]

QPen QCPItemCurve::mainPen ( ) const

protected

Definition at line 30524 of file qcustomplot.cpp.

References mPen, QCPAbstractItem::mSelected, and mSelectedPen.

Referenced by draw().

◆ mainPen() [2/2]

QPen QCPItemCurve::mainPen ( ) const

protected

◆ pen() [1/2]

QPen QCPItemCurve::pen ( ) const

inline

Definition at line 7332 of file qcustomplot.h.

Referenced by setPen(), and setSelectedPen().

◆ pen() [2/2]

QPen QCPItemCurve::pen ( ) const

inline

Definition at line 3986 of file qcustomplot.h.

◆ selectedPen() [1/2]

QPen QCPItemCurve::selectedPen ( ) const

inline

Definition at line 7333 of file qcustomplot.h.

◆ selectedPen() [2/2]

QPen QCPItemCurve::selectedPen ( ) const

inline

Definition at line 3987 of file qcustomplot.h.

◆ selectTest() [1/2]

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

virtual

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

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

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/ deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

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 0 as details to indicate that you are not interested in those selection details.

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

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

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

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

You may pass 0 as details to indicate that you are not interested in those selection details.

See also: selectEvent, deselectEvent, QCustomPlot::setInteractions

Implements QCPAbstractItem.

Definition at line 30459 of file qcustomplot.cpp.

References QCPVector2D::distanceSquaredToLine(), end, endDir, QCPAbstractItem::mSelectable, QCPItemPosition::pixelPosition(), start, and startDir.

◆ selectTest() [2/2]

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

virtual

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

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

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/ deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

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 0 as details to indicate that you are not interested in those selection details.

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

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

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

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

You may pass 0 as details to indicate that you are not interested in those selection details.

See also: selectEvent, deselectEvent, QCustomPlot::setInteractions

Implements QCPAbstractItem.

◆ setHead() [1/2]

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:30444

QCPLineEnding::esSpikeArrow

@ esSpikeArrow

A filled arrow head with an indented back.

Definition: qcustomplot.h:1760

See also: setTail

Definition at line 30444 of file qcustomplot.cpp.

References head(), and mHead.

◆ setHead() [2/2]

void QCPItemCurve::setHead ( const QCPLineEnding & head )

◆ setPen() [1/2]

void QCPItemCurve::setPen ( const QPen & pen )

Sets the pen that will be used to draw the line

See also: setSelectedPen

Definition at line 30425 of file qcustomplot.cpp.

References mPen, and pen().

Referenced by QCPItemCurve().

◆ setPen() [2/2]

void QCPItemCurve::setPen ( const QPen & pen )

◆ setSelectedPen() [1/2]

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 30432 of file qcustomplot.cpp.

References mSelectedPen, and pen().

Referenced by QCPItemCurve().

◆ setSelectedPen() [2/2]

void QCPItemCurve::setSelectedPen ( const QPen & pen )

◆ setTail() [1/2]

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:30456

See also: setHead

Definition at line 30456 of file qcustomplot.cpp.

References mTail, and tail().

◆ setTail() [2/2]

void QCPItemCurve::setTail ( const QCPLineEnding & tail )

◆ tail() [1/2]

QCPLineEnding QCPItemCurve::tail ( ) const

inline

Definition at line 7335 of file qcustomplot.h.

Referenced by setTail().

◆ tail() [2/2]

QCPLineEnding QCPItemCurve::tail ( ) const

inline

Definition at line 3989 of file qcustomplot.h.

Member Data Documentation

◆ end

QCPItemPosition *const QCPItemCurve::end

Definition at line 7351 of file qcustomplot.h.

Referenced by draw(), QCPItemCurve(), and selectTest().

◆ endDir

QCPItemPosition *const QCPItemCurve::endDir

Definition at line 7350 of file qcustomplot.h.

Referenced by draw(), QCPItemCurve(), and selectTest().

◆ mHead

QCPLineEnding QCPItemCurve::mHead

protected

Definition at line 7356 of file qcustomplot.h.

Referenced by draw(), and setHead().

◆ mPen

QPen QCPItemCurve::mPen

protected

Definition at line 7355 of file qcustomplot.h.

Referenced by mainPen(), and setPen().

◆ mSelectedPen

QPen QCPItemCurve::mSelectedPen

protected

Definition at line 7355 of file qcustomplot.h.

Referenced by mainPen(), and setSelectedPen().

◆ mTail

QCPLineEnding QCPItemCurve::mTail

protected

Definition at line 7356 of file qcustomplot.h.

Referenced by draw(), and setTail().

◆ start

QCPItemPosition *const QCPItemCurve::start

Definition at line 7348 of file qcustomplot.h.

Referenced by draw(), QCPItemCurve(), and selectTest().

◆ startDir

QCPItemPosition *const QCPItemCurve::startDir

Definition at line 7349 of file qcustomplot.h.

Referenced by draw(), QCPItemCurve(), and selectTest().

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

/root/ACloudViewer/app/extern/QCustomPlot/qcustomplot.h
/root/ACloudViewer/app/extern/QCustomPlot/qcustomplot.cpp

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QCPItemCurve() [1/2]

◆ ~QCPItemCurve() [1/2]

◆ QCPItemCurve() [2/2]

◆ ~QCPItemCurve() [2/2]

Member Function Documentation

◆ draw() [1/2]

◆ draw() [2/2]

◆ head() [1/2]

◆ head() [2/2]

◆ mainPen() [1/2]

◆ mainPen() [2/2]

◆ pen() [1/2]

◆ pen() [2/2]

◆ selectedPen() [1/2]

◆ selectedPen() [2/2]

◆ selectTest() [1/2]

◆ selectTest() [2/2]

◆ setHead() [1/2]

◆ setHead() [2/2]

◆ setPen() [1/2]

◆ setPen() [2/2]

◆ setSelectedPen() [1/2]

◆ setSelectedPen() [2/2]

◆ setTail() [1/2]

◆ setTail() [2/2]

◆ tail() [1/2]

◆ tail() [2/2]

Member Data Documentation

◆ end

◆ endDir

◆ mHead

◆ mPen

◆ mSelectedPen

◆ mTail

◆ start

◆ startDir