LARS
LARS (Light Augmented Reality System) is an open-source framework for light-based interaction and real-time tracking in multi-robot experiments. Inspired by ARK, LARS extends the augmented reality paradigm to robotic collectives by projecting dynamic visual cues and environments onto the arena, enabling new experimental possibilities for collective robotics research, education, and outreach. LARS features integrated tracking, light projection, and modular experiment control with a user-friendly Qt GUI.
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QCPItemEllipse Class Reference

An ellipse. More...

Inheritance diagram for QCPItemEllipse:
QCPAbstractItem QCPLayerable

Public Member Functions

 QCPItemEllipse (QCustomPlot *parentPlot)
QPen pen () const
QPen selectedPen () const
QBrush brush () const
QBrush selectedBrush () const
void setPen (const QPen &pen)
void setSelectedPen (const QPen &pen)
void setBrush (const QBrush &brush)
void setSelectedBrush (const QBrush &brush)
virtual double selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const Q_DECL_OVERRIDE
Public Member Functions inherited from QCPAbstractItem
 QCPAbstractItem (QCustomPlot *parentPlot)
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=nullptr)
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 topLeft
QCPItemPosition *const bottomRight
QCPItemAnchor *const topLeftRim
QCPItemAnchor *const top
QCPItemAnchor *const topRightRim
QCPItemAnchor *const right
QCPItemAnchor *const bottomRightRim
QCPItemAnchor *const bottom
QCPItemAnchor *const bottomLeftRim
QCPItemAnchor *const left
QCPItemAnchor *const center

Protected Types

enum  AnchorIndex {
  aiTopLeftRim , aiTop , aiTopRightRim , aiRight ,
  aiBottomRightRim , aiBottom , aiBottomLeftRim , aiLeft ,
  aiCenter
}

Protected Member Functions

virtual void draw (QCPPainter *painter) Q_DECL_OVERRIDE
virtual QPointF anchorPixelPosition (int anchorId) const Q_DECL_OVERRIDE
QPen mainPen () const
QBrush mainBrush () const
Protected Member Functions inherited from 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
double rectDistance (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

Protected Attributes

QPen mPen
QPen mSelectedPen
QBrush mBrush
QBrush mSelectedBrush
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)
Signals inherited from QCPLayerable
void layerChanged (QCPLayer *newLayer)

Detailed Description

An ellipse.

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

It has two positions, topLeft and bottomRight, which define the rect the ellipse will be drawn in.

Constructor & Destructor Documentation

◆ QCPItemEllipse()

QCPItemEllipse::QCPItemEllipse ( QCustomPlot * parentPlot)
explicit

Creates an ellipse 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.

Member Function Documentation

◆ anchorPixelPosition()

QPointF QCPItemEllipse::anchorPixelPosition ( int anchorId) const
protectedvirtual

Reimplemented from QCPAbstractItem.

◆ draw()

void QCPItemEllipse::draw ( QCPPainter * painter)
protectedvirtual

Implements QCPAbstractItem.

◆ selectTest()

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

◆ setBrush()

void QCPItemEllipse::setBrush ( const QBrush & brush)

Sets the brush that will be used to fill the ellipse. To disable filling, set brush to Qt::NoBrush.

See also
setSelectedBrush, setPen

◆ setPen()

void QCPItemEllipse::setPen ( const QPen & pen)

Sets the pen that will be used to draw the line of the ellipse

See also
setSelectedPen, setBrush

◆ setSelectedBrush()

void QCPItemEllipse::setSelectedBrush ( const QBrush & brush)

Sets the brush that will be used to fill the ellipse when selected. To disable filling, set brush to Qt::NoBrush.

See also
setBrush

◆ setSelectedPen()

void QCPItemEllipse::setSelectedPen ( const QPen & pen)

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

See also
setPen, setSelected
The documentation for this class was generated from the following files: