A line from one point to another. Więcej...

#include <qcustomplot.hh>

Diagram dziedziczenia dla QCPItemLine

Diagram współpracy dla QCPItemLine:

[legenda]

Metody publiczne
	QCPItemLine (QCustomPlot *parentPlot)

virtual	~QCPItemLine ()

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 Q_DECL_OVERRIDE

Metody publiczne dziedziczone z 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

Metody publiczne dziedziczone z 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

Atrybuty publiczne
QCPItemPosition *const	start

QCPItemPosition *const	end

Metody chronione
virtual void	draw (QCPPainter *painter) Q_DECL_OVERRIDE

QLineF	getRectClippedLine (const QCPVector2D &start, const QCPVector2D &end, const QRect &rect) const

QPen	mainPen () const

Metody chronione dziedziczone z QCPAbstractItem
virtual QCP::Interaction	selectionCategory () const Q_DECL_OVERRIDE

virtual QRect	clipRect () const Q_DECL_OVERRIDE

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const Q_DECL_OVERRIDE

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

virtual void	deselectEvent (bool *selectionStateChanged) Q_DECL_OVERRIDE

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)

Metody chronione dziedziczone z 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

Atrybuty chronione
QPen	mPen

QPen	mSelectedPen

QCPLineEnding	mHead

QCPLineEnding	mTail

Atrybuty chronione dziedziczone z QCPAbstractItem
bool	mClipToAxisRect

QPointer< QCPAxisRect >	mClipAxisRect

QList< QCPItemPosition * >	mPositions

QList< QCPItemAnchor * >	mAnchors

bool	mSelectable

bool	mSelected

Atrybuty chronione dziedziczone z QCPLayerable
bool	mVisible

QCustomPlot *	mParentPlot

QPointer< QCPLayerable >	mParentLayerable

QCPLayer *	mLayer

bool	mAntialiased

Dodatkowe Dziedziczone Składowe
Sygnały dziedziczone z QCPAbstractItem
void	selectionChanged (bool selected)

void	selectableChanged (bool selectable)

Sygnały dziedziczone z QCPLayerable
void	layerChanged (QCPLayer *newLayer)

Opis szczegółowy

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

It has two positions, start and end, which define the end points of the line.

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

Dokumentacja konstruktora i destruktora

QCPItemLine::QCPItemLine ( QCustomPlot * parentPlot )

explicit

Creates a line 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.

QCPItemLine::~QCPItemLine ( )

virtual

Dokumentacja funkcji składowych

void QCPItemLine::draw ( QCPPainter * painter )

protectedvirtual

Implementuje QCPAbstractItem.

QLineF QCPItemLine::getRectClippedLine	(	const QCPVector2D &	start,
		const QCPVector2D &	end,
		const QRect &	rect
	)		const

protected

QCPLineEnding QCPItemLine::head ( ) const

inline

QPen QCPItemLine::mainPen ( ) const

protected

QPen QCPItemLine::pen ( ) const

inline

QPen QCPItemLine::selectedPen ( ) const

inline

double QCPItemLine::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.

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

Zobacz również: selectEvent, deselectEvent, mousePressEvent, wheelEvent, QCustomPlot::setInteractions

Implementuje QCPAbstractItem.

void QCPItemLine::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)

Zobacz również: setTail

void QCPItemLine::setPen ( const QPen & pen )

Sets the pen that will be used to draw the line

Zobacz również: setSelectedPen

void QCPItemLine::setSelectedPen ( const QPen & pen )

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

Zobacz również: setPen, setSelected

void QCPItemLine::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)

Zobacz również: setHead

QCPLineEnding QCPItemLine::tail ( ) const

inline

Dokumentacja atrybutów składowych

QCPItemPosition* const QCPItemLine::end

QCPLineEnding QCPItemLine::mHead

protected

QPen QCPItemLine::mPen

protected

QPen QCPItemLine::mSelectedPen

protected

QCPLineEnding QCPItemLine::mTail

protected

QCPItemPosition* const QCPItemLine::start

Dokumentacja dla tej klasy została wygenerowana z plików:

Metody publiczne

Atrybuty publiczne

Metody chronione

Atrybuty chronione

Dodatkowe Dziedziczone Składowe

Opis szczegółowy

Dokumentacja konstruktora i destruktora

Dokumentacja funkcji składowych

Dokumentacja atrybutów składowych