Sources_For_Linux/Qwt/doc/man/man3/QwtCompass.3

.TH "QwtCompass" 3 "Mon Dec 28 2020" "Version 6.1.6" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtCompass \- A Compass Widget\&.  

.SH SYNOPSIS
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.PP
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\fC#include <qwt_compass\&.h>\fP
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Inherits \fBQwtDial\fP\&.
.SS "Public Member Functions"

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.RI "\fBQwtCompass\fP (QWidget *parent=NULL)"
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.RI "Constructor\&. "
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.RI "virtual \fB~QwtCompass\fP ()"
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.RI "Destructor\&. "
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.RI "void \fBsetRose\fP (\fBQwtCompassRose\fP *\fBrose\fP)"
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.RI "const \fBQwtCompassRose\fP * \fBrose\fP () const"
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.RI "\fBQwtCompassRose\fP * \fBrose\fP ()"
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.SS "Protected Member Functions"

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.RI "virtual void \fBdrawRose\fP (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup) const"
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.RI "virtual void \fBdrawScaleContents\fP (QPainter *, const QPointF &center, double radius) const"
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.RI "virtual void \fBkeyPressEvent\fP (QKeyEvent *)"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
A Compass Widget\&. 

\fBQwtCompass\fP is a widget to display and enter directions\&. It consists of a scale, an optional needle and rose\&.
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\fBNote\fP
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The examples/dials example shows how to use \fBQwtCompass\fP\&. 
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.SH "Constructor & Destructor Documentation"
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.SS "QwtCompass::QwtCompass (QWidget * parent = \fCNULL\fP)\fC [explicit]\fP"

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Constructor\&. 
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\fBParameters\fP
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\fIparent\fP Parent widget
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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 \fBQwtDial::RotateNeedle\fP\&. 
.SH "Member Function Documentation"
.PP 
.SS "void QwtCompass::drawRose (QPainter * painter, const QPointF & center, double radius, double north, QPalette::ColorGroup cg) const\fC [protected]\fP, \fC [virtual]\fP"
Draw the compass rose
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\fBParameters\fP
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\fIpainter\fP Painter 
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\fIcenter\fP Center of the compass 
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\fIradius\fP of the circle, where to paint the rose 
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\fInorth\fP Direction pointing north, in degrees counter clockwise 
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\fIcg\fP Color group 
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.SS "void QwtCompass::drawScaleContents (QPainter * painter, const QPointF & center, double radius) const\fC [protected]\fP, \fC [virtual]\fP"
Draw the contents of the scale
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\fBParameters\fP
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\fIpainter\fP Painter 
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\fIcenter\fP Center of the content circle 
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\fIradius\fP Radius of the content circle 
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Reimplemented from \fBQwtDial\fP\&.
.SS "void QwtCompass::keyPressEvent (QKeyEvent * kev)\fC [protected]\fP, \fC [virtual]\fP"
Handles key events
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Beside the keys described in \fBQwtDial::keyPressEvent\fP numbers from 1-9 (without 5) set the direction according to their position on the num pad\&.
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\fBSee also\fP
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\fBisReadOnly()\fP 
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Reimplemented from \fBQwtAbstractSlider\fP\&.
.SS "\fBQwtCompassRose\fP * QwtCompass::rose ()"

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\fBReturns\fP
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rose 
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\fBSee also\fP
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\fBsetRose()\fP 
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.SS "const \fBQwtCompassRose\fP * QwtCompass::rose () const"

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\fBReturns\fP
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rose 
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\fBSee also\fP
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\fBsetRose()\fP 
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.SS "void QwtCompass::setRose (\fBQwtCompassRose\fP * rose)"
Set a rose for the compass 
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\fBParameters\fP
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\fIrose\fP Compass rose 
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\fBWarning\fP
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The rose will be deleted, when a different rose is set or in ~QwtCompass 
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\fBSee also\fP
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\fBrose()\fP 
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.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.