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QwtPlotMarker

NAME

QwtPlotMarker -

SYNOPSIS

Inherits QwtPlotItem.

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 QwtSymbol & symbol () 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

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

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 350 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 120 of file qwt_plot_marker.cpp.

References QwtPainter::drawLine(), and QwtScaleMap::transform().

QwtText QwtPlotMarker::label () const

Returns:

the label

See also:

setLabel()

Definition at line 285 of file qwt_plot_marker.cpp.

Referenced by setLabel().

Qt::Alignment QwtPlotMarker::labelAlignment () const

Returns:

the label alignment

See also:

setLabelAlignment()

Definition at line 321 of file qwt_plot_marker.cpp.

const QPen & QwtPlotMarker::linePen () const

Returns:

the line pen

See also:

setLinePen()

Definition at line 345 of file qwt_plot_marker.cpp.

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle () const

Returns:

the line style

See also:

For a description of line styles, see QwtPlotMarker::setLineStyle()

Definition at line 242 of file qwt_plot_marker.cpp.

void QwtPlotMarker::setLabel (const QwtText & label)

Set the label.

Parameters:

label label text

See also:

label()

Definition at line 272 of file qwt_plot_marker.cpp.

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

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 304 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 332 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

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 229 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

void QwtPlotMarker::setSymbol (const QwtSymbol & s)

Assign a symbol.

Parameters:

s New symbol

See also:

symbol()

Definition at line 252 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

void QwtPlotMarker::setValue (const QwtDoublePoint &)

Set Value.

Definition at line 85 of file qwt_plot_marker.cpp.

References setValue().

void QwtPlotMarker::setValue (double, double)

Set Value.

Definition at line 91 of file qwt_plot_marker.cpp.

References QwtPlotItem::itemChanged().

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

void QwtPlotMarker::setXValue (double)

Set X Value.

Definition at line 102 of file qwt_plot_marker.cpp.

References setValue().

void QwtPlotMarker::setYValue (double)

Set Y Value.

Definition at line 108 of file qwt_plot_marker.cpp.

References setValue().

const QwtSymbol & QwtPlotMarker::symbol () const

Returns:

the symbol

See also:

setSymbol(), QwtSymbol

Definition at line 262 of file qwt_plot_marker.cpp.

QwtDoublePoint QwtPlotMarker::value () const

Return Value.

Definition at line 67 of file qwt_plot_marker.cpp.

double QwtPlotMarker::xValue () const

Return x Value.

Definition at line 73 of file qwt_plot_marker.cpp.

double QwtPlotMarker::yValue () const

Return y Value.

Definition at line 79 of file qwt_plot_marker.cpp.

Author

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