| Qwt User's Guide
    6.0.2
    | 
#include <qwt_dial_needle.h>

| Public Member Functions | |
| QwtDialNeedle () | |
| virtual | ~QwtDialNeedle () | 
| virtual void | draw (QPainter *painter, const QPointF ¢er, double length, double direction, QPalette::ColorGroup=QPalette::Active) const | 
| const QPalette & | palette () const | 
| virtual void | setPalette (const QPalette &) | 
| Protected Member Functions | |
| virtual void | drawKnob (QPainter *, double width, const QBrush &, bool sunken) const | 
| virtual void | drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0 | 
Base class for needles that can be used in a QwtDial.
QwtDialNeedle is a pointer that indicates a value by pointing to a specific direction.
Qwt is missing a set of good looking needles. Contributions are very welcome.
| 
 | virtual | 
Draw the needle
| painter | Painter | 
| center | Center of the dial, start position for the needle | 
| length | Length of the needle | 
| direction | Direction of the needle, in degrees counter clockwise | 
| colorGroup | Color group, used for painting | 
| 
 | protectedpure virtual | 
Draw the needle.
The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ).
The painter is already initilaized with translation and rotation.
| painter | Painter | 
| length | Length of the needle | 
| colorGroup | Color group, used for painting | 
Implemented in QwtCompassWindArrow, QwtCompassMagnetNeedle, and QwtDialSimpleNeedle.
| const QPalette & QwtDialNeedle::palette | ( | ) | const | 
| 
 | virtual | 
Sets the palette for the needle.
| palette | New Palette | 
 1.8.1
 1.8.1