QwtPlotMarker Class Reference

Inheritance diagram for QwtPlotMarker:

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Collaboration diagram for QwtPlotMarker:

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List of all members.

Detailed Description

A class for drawing markers.

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

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

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

Definition at line 45 of file qwt_plot_marker.h.

Public Types

enum  LineStyle {
  NoLine,
  HLine,
  VLine,
  Cross
}

Public Member Functions

 QwtPlotMarker ()
virtual ~QwtPlotMarker ()
virtual int rtti () const
double xValue () const
double yValue () const
QwtDoublePoint value () const
void setXValue (double)
void setYValue (double)
void setValue (double, double)
void setValue (const QwtDoublePoint &)
void setLineStyle (LineStyle st)
LineStyle lineStyle () const
void setLinePen (const QPen &p)
const QPen & linePen () const
void setSymbol (const QwtSymbol &s)
const QwtSymbolsymbol () const
void setLabel (const QwtText &)
QwtText label () const
void setLabelAlignment (Qt::Alignment)
Qt::Alignment labelAlignment () const
virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &) const
virtual QwtDoubleRect boundingRect () const


Member Enumeration Documentation

enum QwtPlotMarker::LineStyle

Line styles.

See also:
QwtPlotMarker::setLineStyle, QwtPlotMarker::lineStyle
Enumerator:
NoLine 
HLine 
VLine 
Cross 

Definition at line 53 of file qwt_plot_marker.h.


Constructor & Destructor Documentation

QwtPlotMarker::QwtPlotMarker (  )  [explicit]

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

Definition at line 48 of file qwt_plot_marker.cpp.

References QwtPlotItem::setZ().

QwtPlotMarker::~QwtPlotMarker (  )  [virtual]

Destructor.

Definition at line 56 of file qwt_plot_marker.cpp.


Member Function Documentation

int QwtPlotMarker::rtti (  )  const [virtual]

Returns:
QwtPlotItem::Rtti_PlotMarker

Reimplemented from QwtPlotItem.

Definition at line 62 of file qwt_plot_marker.cpp.

References QwtPlotItem::Rtti_PlotMarker.

double QwtPlotMarker::xValue (  )  const

Return x Value.

Definition at line 74 of file qwt_plot_marker.cpp.

double QwtPlotMarker::yValue (  )  const

Return y Value.

Definition at line 80 of file qwt_plot_marker.cpp.

QwtDoublePoint QwtPlotMarker::value (  )  const

Return Value.

Definition at line 68 of file qwt_plot_marker.cpp.

void QwtPlotMarker::setXValue ( double   ) 

Set X Value.

Definition at line 103 of file qwt_plot_marker.cpp.

References setValue().

void QwtPlotMarker::setYValue ( double   ) 

Set Y Value.

Definition at line 109 of file qwt_plot_marker.cpp.

References setValue().

void QwtPlotMarker::setValue ( double  ,
double   
)

Set Value.

Definition at line 92 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

Referenced by setValue(), setXValue(), and setYValue().

void QwtPlotMarker::setValue ( const QwtDoublePoint  ) 

Set Value.

Definition at line 86 of file qwt_plot_marker.cpp.

References setValue().

void QwtPlotMarker::setLineStyle ( QwtPlotMarker::LineStyle  st  ) 

Set the line style.

Parameters:
st Line style. Can be one of QwtPlotMarker::NoLine, HLine, VLine or Cross
See also:
lineStyle()

Definition at line 230 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle (  )  const

Returns:
the line style
See also:
For a description of line styles, see QwtPlotMarker::setLineStyle()

Definition at line 243 of file qwt_plot_marker.cpp.

void QwtPlotMarker::setLinePen ( const QPen &  p  ) 

Specify a pen for the line.

Parameters:
p New pen
See also:
linePen()

Definition at line 333 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

Referenced by QwtPlotPrintFilter::apply().

const QPen & QwtPlotMarker::linePen (  )  const

Returns:
the line pen
See also:
setLinePen()

Definition at line 346 of file qwt_plot_marker.cpp.

Referenced by QwtPlotPrintFilter::apply().

void QwtPlotMarker::setSymbol ( const QwtSymbol s  ) 

Assign a symbol.

Parameters:
s New symbol
See also:
symbol()

Definition at line 253 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

Referenced by QwtPlotPrintFilter::apply().

const QwtSymbol & QwtPlotMarker::symbol (  )  const

Returns:
the symbol
See also:
setSymbol(), QwtSymbol

Definition at line 263 of file qwt_plot_marker.cpp.

Referenced by QwtPlotPrintFilter::apply().

void QwtPlotMarker::setLabel ( const QwtText label  ) 

Set the label.

Parameters:
label label text
See also:
label()

Definition at line 273 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged(), and label().

Referenced by QwtPlotPrintFilter::apply().

QwtText QwtPlotMarker::label (  )  const

Returns:
the label
See also:
setLabel()

Definition at line 286 of file qwt_plot_marker.cpp.

Referenced by QwtPlotPrintFilter::apply(), and setLabel().

void QwtPlotMarker::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 305 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

Qt::Alignment QwtPlotMarker::labelAlignment (  )  const

Returns:
the label alignment
See also:
setLabelAlignment()

Definition at line 322 of file qwt_plot_marker.cpp.

void QwtPlotMarker::draw ( QPainter *  p,
const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QRect &  r 
) const [virtual]

Draw the marker.

Parameters:
p Painter
xMap x Scale Map
yMap y Scale Map
r Bounding rect, where to paint

Implements QwtPlotItem.

Definition at line 121 of file qwt_plot_marker.cpp.

References Cross, QwtPainter::drawLine(), HLine, QwtPainter::metricsMap(), NoLine, QwtSymbol::NoSymbol, QwtMetricsMap::screenToLayoutX(), QwtMetricsMap::screenToLayoutY(), QwtScaleMap::transform(), and VLine.

QwtDoubleRect QwtPlotMarker::boundingRect (  )  const [virtual]

Returns:
An invalid bounding rect: QwtDoubleRect(1.0, 1.0, -2.0, -2.0)

Reimplemented from QwtPlotItem.

Definition at line 351 of file qwt_plot_marker.cpp.


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