QCPItemStraightLine

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Inheritance diagram for QCPItemStraightLine:

Public Member Functions

 QCPItemStraightLine (QCustomPlot *parentPlot)
 
QPen pen () const
 
QPen selectedPen () const
 
virtual double selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const override
 
void setPen (const QPen &pen)
 
void setSelectedPen (const QPen &pen)
 
- Public Member Functions inherited from QCPAbstractItem
 QCPAbstractItem (QCustomPlot *parentPlot)
 
QCPItemAnchoranchor (const QString &name) const
 
QList< QCPItemAnchor * > anchors () const
 
QCPAxisRectclipAxisRect () const
 
bool clipToAxisRect () const
 
bool hasAnchor (const QString &name) const
 
QCPItemPositionposition (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
 
QCPLayerlayer () const
 
QCPLayerableparentLayerable () const
 
QCustomPlotparentPlot () 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< QStringbindableObjectName ()
 
bool blockSignals (bool block)
 
const QObjectListchildren () 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< QByteArraydynamicPropertyNames () const const
 
virtual bool event (QEvent *e)
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 
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 QMetaObjectmetaObject () const const
 
void moveToThread (QThread *targetThread)
 
QString objectName () const const
 
void objectNameChanged (const QString &objectName)
 
QObjectparent () 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
 
qobject_cast (const QObject *object)
 
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)
 
QThreadthread () const const
 

Public Attributes

QCPItemPosition *const point1
 
QCPItemPosition *const point2
 

Protected Member Functions

virtual void draw (QCPPainter *painter) override
 
QLineF getRectClippedStraightLine (const QCPVector2D &base, const QCPVector2D &vec, const QRect &rect) const
 
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
 
QCPItemAnchorcreateAnchor (const QString &name, int anchorId)
 
QCPItemPositioncreatePosition (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
 
QObjectsender () const const
 
int senderSignalIndex () const const
 
virtual void timerEvent (QTimerEvent *event)
 

Protected Attributes

QPen mPen
 
QPen mSelectedPen
 
- Protected Attributes inherited from QCPAbstractItem
QList< QCPItemAnchor * > mAnchors
 
QPointer< QCPAxisRectmClipAxisRect
 
bool mClipToAxisRect
 
QList< QCPItemPosition * > mPositions
 
bool mSelectable
 
bool mSelected
 
- Protected Attributes inherited from QCPLayerable
bool mAntialiased
 
QCPLayermLayer
 
QPointer< QCPLayerablemParentLayerable
 
QCustomPlotmParentPlot
 
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 straight line that spans infinitely in both directions.

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

It has two positions, point1 and point2, which define the straight line.

Definition at line 6422 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPItemStraightLine()

QCPItemStraightLine::QCPItemStraightLine ( QCustomPlot * parentPlot)
explicit

Creates a straight 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.

Definition at line 28875 of file qcustomplot.cpp.

◆ ~QCPItemStraightLine()

QCPItemStraightLine::~QCPItemStraightLine ( )
overridevirtual

Definition at line 28887 of file qcustomplot.cpp.

Member Function Documentation

◆ draw()

void QCPItemStraightLine::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 28922 of file qcustomplot.cpp.

◆ getRectClippedStraightLine()

QLineF QCPItemStraightLine::getRectClippedStraightLine ( const QCPVector2D & base,
const QCPVector2D & vec,
const QRect & rect ) const
protected

Returns the section of the straight line defined by base and direction vector vec, that is visible in the specified rect.

This is a helper function for draw.

Definition at line 28944 of file qcustomplot.cpp.

◆ mainPen()

QPen QCPItemStraightLine::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 29028 of file qcustomplot.cpp.

◆ pen()

QPen QCPItemStraightLine::pen ( ) const
inline

Definition at line 6434 of file qcustomplot.h.

◆ selectedPen()

QPen QCPItemStraightLine::selectedPen ( ) const
inline

Definition at line 6435 of file qcustomplot.h.

◆ selectTest()

double QCPItemStraightLine::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 28912 of file qcustomplot.cpp.

◆ setPen()

void QCPItemStraightLine::setPen ( const QPen & pen)

Sets the pen that will be used to draw the line

See also
setSelectedPen

Definition at line 28896 of file qcustomplot.cpp.

◆ setSelectedPen()

void QCPItemStraightLine::setSelectedPen ( const QPen & pen)

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

See also
setPen, setSelected

Definition at line 28906 of file qcustomplot.cpp.

Member Data Documentation

◆ mPen

QPen QCPItemStraightLine::mPen
protected

Definition at line 6449 of file qcustomplot.h.

◆ mSelectedPen

QPen QCPItemStraightLine::mSelectedPen
protected

Definition at line 6449 of file qcustomplot.h.

◆ point1

QCPItemPosition* const QCPItemStraightLine::point1

Definition at line 6444 of file qcustomplot.h.

◆ point2

QCPItemPosition* const QCPItemStraightLine::point2

Definition at line 6445 of file qcustomplot.h.


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