QwtPolarMarker - Man Page
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
Additional Inherited Members
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.
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, double radius, 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::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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