QwtPolarMarker - A class for drawing markers.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtPolarMarker::QwtPolarMarker () [explicit]  QwtPolarMarker::˜QwtPolarMarker () [virtual]  Member Function Documentation  QwtInterval QwtPolarMarker::boundingInterval (int scaleId) const[override], [virtual]  void QwtPolarMarker::draw (QPainter * painter, const QwtScaleMap &azimuthMap, const QwtScaleMap & radialMap, const QPointF & pole, doubleradius, const QRectF & canvasRect) const [override], [virtual]  QwtText QwtPolarMarker::label () const  Qt::Alignment QwtPolarMarker::labelAlignment () const  QwtPointPolar QwtPolarMarker::position () const  int QwtPolarMarker::rtti () const [override], [virtual]  void QwtPolarMarker::setLabel (const QwtText & label)  void QwtPolarMarker::setLabelAlignment (Qt::Alignment align)  void QwtPolarMarker::setPosition (const QwtPointPolar & pos)  void QwtPolarMarker::setSymbol (const QwtSymbol * symbol)  const QwtSymbol * QwtPolarMarker::symbol () const  Author 

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NAME

QwtPolarMarker − A class for drawing markers.

SYNOPSIS

#include <qwt_polar_marker.h>

Inherits QwtPolarItem.

Public Member Functions

QwtPolarMarker ()
Sets alignment to Qt::AlignCenter, and style to NoLine.
virtual ˜QwtPolarMarker ()
Destructor.
virtual int rtti () const override
void setPosition (const QwtPointPolar &)
Change the position of the marker.
QwtPointPolar position () const
void setSymbol (const QwtSymbol *s)
Assign a symbol.
const QwtSymbol * symbol () const
void setLabel (const QwtText &)
Set the label.
QwtText label () const
void setLabelAlignment (Qt::Alignment)
Set the alignment of the label.
Qt::Alignment labelAlignment () const
virtual void draw (QPainter *painter, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, double radius, const QRectF &canvasRect) const override
virtual QwtInterval boundingInterval (int scaleId) const override

Public Member Functions inherited from QwtPolarItem

QwtPolarItem (const QwtText &title=QwtText())
virtual ˜QwtPolarItem ()
Destroy the QwtPolarItem.
void attach (QwtPolarPlot *plot)
Attach the item to a plot.
void detach ()
This method detaches a QwtPolarItem from the QwtPolarPlot it has been associated with.
QwtPolarPlot * plot () const
void setTitle (const QString &title)
void setTitle (const QwtText &title)
const QwtText & title () const
void setItemAttribute (ItemAttribute, bool on=true)
bool testItemAttribute (ItemAttribute) const
void setRenderHint (RenderHint, bool on=true)
bool testRenderHint (RenderHint) const
void setRenderThreadCount (uint numThreads)
uint renderThreadCount () const
double z () const
void setZ (double z)
Set the z value.
void show ()
Show the item.
void hide ()
Hide the item.
virtual void setVisible (bool)
bool isVisible () const
virtual void itemChanged ()
virtual void legendChanged ()
virtual void updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &, const QwtInterval &)
Update the item to changes of the axes scale division.
virtual int marginHint () const
void setLegendIconSize (const QSize &)
QSize legendIconSize () const
virtual QList< QwtLegendData > legendData () const
Return all information, that is needed to represent the item on the legend.
virtual QwtGraphic legendIcon (int index, const QSizeF &) const

Additional Inherited Members

Public Types inherited from QwtPolarItem

enum RttiValues { Rtti_PolarItem = 0, Rtti_PolarGrid, Rtti_PolarMarker, Rtti_PolarCurve, Rtti_PolarSpectrogram, Rtti_PolarUserItem = 1000 }
Runtime type information.
enum ItemAttribute { Legend = 0x01, AutoScale = 0x02 }
Plot Item Attributes.
enum RenderHint { RenderAntialiased = 0x01 }
Render hints.
typedef QFlags< ItemAttribute > ItemAttributes
typedef QFlags< RenderHint > RenderHints

Detailed Description

A class for drawing markers.

A marker can be a a symbol, a label or a combination of them, which can be drawn around a center point inside a bounding rectangle.

The setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.

With setLabel(), a label can be assigned to the marker. The setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The alignment refers to the center point of the marker, which means, for example, that the label would be painted left above the center point if the alignment was set to AlignLeft|AlignTop.

Definition at line 36 of file qwt_polar_marker.h.

Constructor & Destructor Documentation

QwtPolarMarker::QwtPolarMarker () [explicit]

Sets alignment to Qt::AlignCenter, and style to NoLine.

Definition at line 42 of file qwt_polar_marker.cpp.

QwtPolarMarker::˜QwtPolarMarker () [virtual]

Destructor.

Definition at line 52 of file qwt_polar_marker.cpp.

Member Function Documentation

QwtInterval QwtPolarMarker::boundingInterval (int scaleId) const[override], [virtual]

Interval, that is necessary to display the item This interval can be useful for operations like clipping or autoscaling

Parameters

scaleId Scale index

Returns

bounding interval ( == position )

See also

position()

Reimplemented from QwtPolarItem.

Definition at line 228 of file qwt_polar_marker.cpp.

void QwtPolarMarker::draw (QPainter * painter, const QwtScaleMap &azimuthMap, const QwtScaleMap & radialMap, const QPointF & pole, doubleradius, const QRectF & canvasRect) const [override], [virtual]

Draw the marker

Parameters

painter Painter
azimuthMap Maps azimuth values to values related to 0.0, M_2PI
radialMap Maps radius values into painter coordinates.
pole Position of the pole in painter coordinates
radius Radius of the complete plot area in painter coordinates
canvasRect Contents rect of the canvas in painter coordinates

Implements QwtPolarItem.

Definition at line 89 of file qwt_polar_marker.cpp.

QwtText QwtPolarMarker::label () const

Returns

the label

See also

setLabel()

Definition at line 185 of file qwt_polar_marker.cpp.

Qt::Alignment QwtPolarMarker::labelAlignment () const

Returns

the label alignment

See also

setLabelAlignment()

Definition at line 214 of file qwt_polar_marker.cpp.

QwtPointPolar QwtPolarMarker::position () const

Returns

Position of the marker

Definition at line 64 of file qwt_polar_marker.cpp.

int QwtPolarMarker::rtti () const [override], [virtual]

Returns

QwtPolarItem::Rtti_PlotMarker

Reimplemented from QwtPolarItem.

Definition at line 58 of file qwt_polar_marker.cpp.

void QwtPolarMarker::setLabel (const QwtText & label)

Set the label.

Parameters

label label text

See also

label()

Definition at line 172 of file qwt_polar_marker.cpp.

void QwtPolarMarker::setLabelAlignment (Qt::Alignment align)

Set the alignment of the label. The alignment determines where the label is drawn relative to the marker’s position.

Parameters

align Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight, AlignCenter, AlgnHCenter, AlignVCenter.

See also

labelAlignment()

Definition at line 201 of file qwt_polar_marker.cpp.

void QwtPolarMarker::setPosition (const QwtPointPolar & pos)

Change the position of the marker.

Definition at line 70 of file qwt_polar_marker.cpp.

void QwtPolarMarker::setSymbol (const QwtSymbol * symbol)

Assign a symbol.

Parameters

symbol New symbol

See also

symbol()

Definition at line 148 of file qwt_polar_marker.cpp.

const QwtSymbol * QwtPolarMarker::symbol () const

Returns

the symbol

See also

setSymbol(), QwtSymbol

Definition at line 162 of file qwt_polar_marker.cpp.

Author

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