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QwtCompass Class Reference

Inheritance diagram for QwtCompass:

QwtDial QwtSliderBase QwtDblRange List of all 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.

compass.gif
Note:
The examples/dials example shows how to use QwtCompass.


Public Member Functions

 QwtCompass (QWidget *parent=0, const char *name=0)
virtual ~QwtCompass ()
void setRose (QwtCompassRose *rose)
const QwtCompassRose * rose () const
QwtCompassRose * rose ()
const QMap< double, QString > & labelMap () const
QMap< double, QString > & labelMap ()
void setLabelMap (const QMap< double, QString > &map)

Protected Member Functions

virtual QString scaleLabel (double value) const
virtual void drawRose (QPainter *, const QPoint &center, int radius, double north, QPalette::ColorGroup) const
virtual void drawScaleContents (QPainter *, const QPoint &center, int radius) const
virtual void keyPressEvent (QKeyEvent *)


Constructor & Destructor Documentation

QwtCompass::QwtCompass QWidget *  parent = 0,
const char *  name = 0
 

Constructor.

Parameters:
parent Parent widget
name Widget name
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.

QwtCompass::~QwtCompass  )  [virtual]
 

Destructor.


Member Function Documentation

void QwtCompass::drawRose QPainter *  painter,
const QPoint &  center,
int  radius,
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 *  ,
const QPoint &  center,
int  radius
const [protected, virtual]
 

Draw the contents of the scale.

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 QwtDial.

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

Returns:
map, mapping values to labels
See also:
QwtCompass::setLabelMap

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

Returns:
map, mapping values to labels
See also:
QwtCompass::setLabelMap

QwtCompassRose * QwtCompass::rose  ) 
 

Returns:
rose
See also:
QwtCompass::setRose

const QwtCompassRose * QwtCompass::rose  )  const
 

Returns:
rose
See also:
QwtCompass::setRose

QString QwtCompass::scaleLabel double  value  )  const [protected, virtual]
 

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 QString::null.
See also:
QwtCompass::labelMap, QwtCompass::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:
QwtCompass::labelMap, QwtCompass::scaleDraw, QwtScaleDraw::setScale

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:
QwtCompass::rose


Generated on Tue Nov 4 09:53:45 2003 for Qwt User's Guide by doxygen 1.3.4