QwtCompass (3)

#include <qwt_compass.h>

Inherits QwtDial.

Public Member Functions

QwtCompass (QWidget *parent=NULL)

virtual ~QwtCompass ()

const QMap< double, QString > & labelMap () const

QMap< double, QString > & labelMap ()

const QwtCompassRose * rose () const

QwtCompassRose * rose ()

void setLabelMap (const QMap< double, QString > &map)

void setRose (QwtCompassRose *rose)

Protected Member Functions

virtual void drawRose (QPainter *, const QPoint ¢er, int radius, double north, QPalette::ColorGroup) const

virtual void drawScaleContents (QPainter *, const QPoint ¢er, int radius) const

virtual void keyPressEvent (QKeyEvent *)

virtual QwtText scaleLabel (double value) const

Additional Inherited Members

A Compass Widget.

QwtCompass is a widget to display and enter directions. It consists of a scale, an optional needle and rose.

Note:

The examples/dials example shows how to use QwtCompass.

QwtCompass::QwtCompass (QWidget *parent = \fCNULL\fP)\fC [explicit]\fP

Constructor. Parameters:

parent Parent widget

Create a compass widget with a scale, no needle and no rose. The default origin is 270.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.

void QwtCompass::drawRose (QPainter *painter, const QPoint ¢er, intradius, doublenorth, QPalette::ColorGroupcg) const\fC [protected]\fP, \fC [virtual]\fP

Draw the compass rose

Parameters:

painter Painter

center Center of the compass

radius of the circle, where to paint the rose

north Direction pointing north, in degrees counter clockwise

cg Color group

void QwtCompass::drawScaleContents (QPainter *painter, const QPoint ¢er, intradius) const\fC [protected]\fP, \fC [virtual]\fP

Draw the contents of the scale

Parameters:

painter Painter

center Center of the content circle

radius Radius of the content circle

Reimplemented from QwtDial.

void QwtCompass::keyPressEvent (QKeyEvent *kev)\fC [protected]\fP, \fC [virtual]\fP

Handles key events

Beside the keys described in QwtDial::keyPressEvent numbers from 1-9 (without 5) set the direction according to their position on the num pad.

See also:

isReadOnly()

Reimplemented from QwtDial.

const QMap< double, QString > & QwtCompass::labelMap () const

Returns:

map, mapping values to labels

See also:

setLabelMap()

QMap< double, QString > & QwtCompass::labelMap ()

Returns:

map, mapping values to labels

See also:

setLabelMap()

const \fBQwtCompassRose\fP * QwtCompass::rose () const

Returns:

rose

See also:

setRose()

\fBQwtCompassRose\fP * QwtCompass::rose ()

Returns:

rose

See also:

setRose()

\fBQwtText\fP QwtCompass::scaleLabel (doublevalue) const\fC [protected]\fP, \fC [virtual]\fP

Map a value to a corresponding label

Parameters:

value Value that will be mapped

Returns:

Label, or QString::null

label() looks in a map for a corresponding label for value or return an null text.

See also:

labelMap(), setLabelMap()

Reimplemented from QwtDial.

void QwtCompass::setLabelMap (const QMap< double, QString > &map)

Set a map, mapping values to labels. Parameters:

map value to label map

The values of the major ticks are found by looking into this map. The default map consists of the labels N, NE, E, SE, S, SW, W, NW.

Warning:

The map will have no effect for values that are no major tick values. Major ticks can be changed by QwtScaleDraw::setScale

See also:

labelMap(), scaleDraw(), setScale()

void QwtCompass::setRose (\fBQwtCompassRose\fP *rose)

Set a rose for the compass

Parameters:

rose Compass rose

Warning:

The rose will be deleted, when a different rose is set or in ~QwtCompass

See also:

rose()

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