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Dokumentacja klasy QCPItemLine

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

#include <qcustomplot.h>

Diagram dziedziczenia dla QCPItemLine
Diagram współpracy dla QCPItemLine:

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
 
QCPAxisRectclipAxisRect () 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
 
QCPItemPositionposition (const QString &name) const
 
QCPItemAnchoranchor (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
 
QCustomPlotparentPlot () const
 
QCPLayerableparentLayerable () const
 
QCPLayerlayer () 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
 
QCPItemPositioncreatePosition (const QString &name)
 
QCPItemAnchorcreateAnchor (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< QCPAxisRectmClipAxisRect
 
QList< QCPItemPosition * > mPositions
 
QList< QCPItemAnchor * > mAnchors
 
bool mSelectable
 
bool mSelected
 
- Atrybuty chronione dziedziczone z QCPLayerable
bool mVisible
 
QCustomPlotmParentPlot
 
QPointer< QCPLayerablemParentLayerable
 
QCPLayermLayer
 
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

A line from one point to another.

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.

Definicja w linii 6134 pliku qcustomplot.h.

Dokumentacja konstruktora i destruktora

◆ QCPItemLine()

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.

Definicja w linii 28266 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:

◆ ~QCPItemLine()

QCPItemLine::~QCPItemLine ( )
virtual

Definicja w linii 28278 pliku qcustomplot.cpp.

Dokumentacja funkcji składowych

◆ draw()

void QCPItemLine::draw ( QCPPainter painter)
protectedvirtual

Implementuje QCPAbstractItem.

Definicja w linii 28339 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:

◆ getRectClippedLine()

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

Definicja w linii 28369 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:
Oto graf wywoływań tej funkcji:

◆ head()

QCPLineEnding QCPItemLine::head ( ) const
inline

Definicja w linii 6150 pliku qcustomplot.h.

Oto graf wywoływań tej funkcji:

◆ mainPen()

QPen QCPItemLine::mainPen ( ) const
protected

Definicja w linii 28467 pliku qcustomplot.cpp.

Oto graf wywoływań tej funkcji:

◆ pen()

QPen QCPItemLine::pen ( ) const
inline

Definicja w linii 6148 pliku qcustomplot.h.

Oto graf wywoływań tej funkcji:

◆ selectedPen()

QPen QCPItemLine::selectedPen ( ) const
inline

Definicja w linii 6149 pliku qcustomplot.h.

◆ selectTest()

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.

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.

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

Implementuje QCPAbstractItem.

Definicja w linii 28329 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:

◆ setHead()

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.

Zobacz również
setTail

Definicja w linii 28310 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:

◆ setPen()

void QCPItemLine::setPen ( const QPen &  pen)

Sets the pen that will be used to draw the line

Zobacz również
setSelectedPen

Definicja w linii 28287 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:
Oto graf wywoływań tej funkcji:

◆ setSelectedPen()

void QCPItemLine::setSelectedPen ( const QPen &  pen)

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

Zobacz również
setPen, setSelected

Definicja w linii 28297 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:
Oto graf wywoływań tej funkcji:

◆ setTail()

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.

Zobacz również
setHead

Definicja w linii 28323 pliku qcustomplot.cpp.

Oto graf wywołań dla tej funkcji:

◆ tail()

QCPLineEnding QCPItemLine::tail ( ) const
inline

Definicja w linii 6151 pliku qcustomplot.h.

Oto graf wywoływań tej funkcji:

Dokumentacja atrybutów składowych

◆ end

QCPItemPosition* const QCPItemLine::end

Definicja w linii 6163 pliku qcustomplot.h.

◆ mHead

QCPLineEnding QCPItemLine::mHead
protected

Definicja w linii 6168 pliku qcustomplot.h.

◆ mPen

QPen QCPItemLine::mPen
protected

Definicja w linii 6167 pliku qcustomplot.h.

◆ mSelectedPen

QPen QCPItemLine::mSelectedPen
protected

Definicja w linii 6167 pliku qcustomplot.h.

◆ mTail

QCPLineEnding QCPItemLine::mTail
protected

Definicja w linii 6168 pliku qcustomplot.h.

◆ start

QCPItemPosition* const QCPItemLine::start

Definicja w linii 6162 pliku qcustomplot.h.


Dokumentacja dla tej klasy została wygenerowana z plików:
QCPItemLine::setTail
void setTail(const QCPLineEnding &tail)
Definition: qcustomplot.cpp:28323
QCPItemLine::setHead
void setHead(const QCPLineEnding &head)
Definition: qcustomplot.cpp:28310
QCPLineEnding::esSpikeArrow
@ esSpikeArrow
A filled arrow head with an indented back.
Definition: qcustomplot.h:1491