qwtcompassmagnetneedle.3

linux下qt的第三方的一个类

.TH "QwtCompassMagnetNeedle" 3 "16 Nov 2004" "Version 4.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtCompassMagnetNeedle \- 
.SH SYNOPSIS
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.PP
Inherits \fBQwtDialNeedle\fP.
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.SH "Detailed Description"
.PP 
A magnet needle for compass widgets. 

A magnet needle points to two opposite directions indicating north and south.
.PP
The following colors are used:
.IP "\(bu" 2
QColorGroup::Light
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 Used for pointing south
.IP "\(bu" 2
QColorGroup::Dark
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 Used for pointing north
.IP "\(bu" 2
QColorGroup::Base
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 Knob (ThinStyle only)
.PP
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\fBSee also:\fP
.RS 4
\fBQwtDial\fP, \fBQwtCompass\fP 
.RE
.PP

.PP
Definition at line 123 of file qwt_dial_needle.h.
.SS "Public Types"

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.RI "enum \fBStyle\fP { \fBTriangleStyle\fP, \fBThinStyle\fP }"
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.SS "Public Member Functions"

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.RI "\fBQwtCompassMagnetNeedle\fP (Style=TriangleStyle, const QColor &light=Qt::white, const QColor &dark=Qt::red)"
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.RI "virtual void \fBdraw\fP (QPainter *, const QPoint &, int length, double direction, QPalette::ColorGroup=QPalette::Active) const"
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.SS "Static Public Member Functions"

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.RI "void \fBdrawTriangleNeedle\fP (QPainter *, const QColorGroup &, const QPoint &, int length, double direction)"
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.RI "void \fBdrawThinNeedle\fP (QPainter *, const QColorGroup &, const QPoint &, int length, double direction)"
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.SS "Static Protected Member Functions"

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.RI "void \fBdrawPointer\fP (QPainter *painter, const QBrush &brush, int colorOffset, const QPoint &center, int length, int width, double direction)"
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.SH "Constructor & Destructor Documentation"
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.SS "QwtCompassMagnetNeedle::QwtCompassMagnetNeedle (Style = \fCTriangleStyle\fP, const QColor & light = \fCQt::white\fP, const QColor & dark = \fCQt::red\fP)"
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Constructor. 
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Definition at line 268 of file qwt_dial_needle.cpp.
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References QwtDialNeedle::setPalette().
.SH "Member Function Documentation"
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.SS "void QwtCompassMagnetNeedle::draw (QPainter * painter, const QPoint & center, int length, double direction, QPalette::ColorGroup cg = \fCQPalette::Active\fP) const\fC [virtual]\fP"
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Draw the needle
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIcenter\fP Center of the dial, start position for the needle 
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\fIlength\fP Length of the needle 
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\fIdirection\fP Direction of the needle, in degrees counter clockwise 
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\fIcg\fP Color group, used for painting 
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Implements \fBQwtDialNeedle\fP.
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Definition at line 295 of file qwt_dial_needle.cpp.
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References QwtDialNeedle::colorGroup(), drawThinNeedle(), and drawTriangleNeedle().
.SS "void QwtCompassMagnetNeedle::drawPointer (QPainter * painter, const QBrush & brush, int colorOffset, const QPoint & center, int length, int width, double direction)\fC [static, protected]\fP"
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Draw a compass needle Definition at line 394 of file qwt_dial_needle.cpp.
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Referenced by drawThinNeedle().
.SS "void QwtCompassMagnetNeedle::drawThinNeedle (QPainter * painter, const QColorGroup & cg, const QPoint & center, int length, double direction)\fC [static]\fP"
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Draw a compass needle Definition at line 369 of file qwt_dial_needle.cpp.
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References QwtDialNeedle::drawKnob(), and drawPointer().
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Referenced by draw().
.SS "void QwtCompassMagnetNeedle::drawTriangleNeedle (QPainter * painter, const QColorGroup & cg, const QPoint & center, int length, double direction)\fC [static]\fP"
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Draw a compass needle Definition at line 313 of file qwt_dial_needle.cpp.
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Referenced by draw().

.SH "Author"
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