QwtCompass(3) Qwt User's Guide QwtCompass(3)NAMEQwtCompass-
SYNOPSIS
#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
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 QPoint ¢er,
intradius, doublenorth, QPalette::ColorGroupcg) 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 QPoint
¢er, intradius) 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 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 QwtCompassRose * QwtCompass::rose () const
Returns:
rose
See also:
setRose()
QwtCompassRose * QwtCompass::rose ()
Returns:
rose
See also:
setRose()
QwtText QwtCompass::scaleLabel (doublevalue) 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 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 (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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code.
Version 5.2.3 Tue Nov 20 2012 QwtCompass(3)
