QwtCompass

NAME

QwtCompass - A Compass Widget.

SYNOPSIS

#include <qwt_compass.h>

Inherits QwtDial.

Public Member Functions

QwtCompass (QWidget *parent=NULL)
Constructor.
virtual ˜QwtCompass ()
Destructor.
void setRose (QwtCompassRose *rose)
const QwtCompassRose * rose () const
QwtCompassRose * rose ()

Protected Member Functions

virtual void drawRose (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup) const
virtual void drawScaleContents (QPainter *, const QPointF &center, double radius) const
virtual void keyPressEvent (QKeyEvent *)

Additional Inherited Members

Detailed Description

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.

Constructor & Destructor Documentation

QwtCompass::QwtCompass (QWidget * parent = NULL) [explicit]

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.

Member Function Documentation

void QwtCompass::drawRose (QPainter * painter, const QPointF & center, doubleradius, double north, QPalette::ColorGroup cg) const [protected],[virtual]

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 QPointF &center, double radius) const [protected], [virtual]

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) [protected], [virtual]

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 QwtAbstractSlider.

const QwtCompassRose * QwtCompass::rose () const

Returns:

rose

See also:

setRose()

QwtCompassRose * QwtCompass::rose ()

Returns:

rose

See also:

setRose()

void QwtCompass::setRose (QwtCompassRose * 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()

Author

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