Qwt User's Guide  6.1.3
QwtCompassWindArrow Class Reference

An indicator for the wind direction. More...

#include <qwt_dial_needle.h>

Inheritance diagram for QwtCompassWindArrow:

Public Types

enum  Style { Style1, Style2 }
 Style of the arrow. More...
 

Public Member Functions

 QwtCompassWindArrow (Style, const QColor &light=Qt::white, const QColor &dark=Qt::gray)
 
- Public Member Functions inherited from QwtDialNeedle
 QwtDialNeedle ()
 Constructor.
 
virtual ~QwtDialNeedle ()
 Destructor.
 
virtual void setPalette (const QPalette &)
 
const QPalette & palette () const
 
virtual void draw (QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
 

Protected Member Functions

virtual void drawNeedle (QPainter *, double length, QPalette::ColorGroup) const
 
- Protected Member Functions inherited from QwtDialNeedle
virtual void drawKnob (QPainter *, double width, const QBrush &, bool sunken) const
 Draw the knob.
 

Detailed Description

An indicator for the wind direction.

QwtCompassWindArrow shows the direction where the wind comes from.

  • QPalette::Light
    Used for Style1, or the light half of Style2
  • QPalette::Dark
    Used for the dark half of Style2
See also
QwtDial, QwtCompass

Member Enumeration Documentation

Style of the arrow.

Enumerator
Style1 

A needle pointing to the center.

Style2 

A needle pointing to the center.

Constructor & Destructor Documentation

QwtCompassWindArrow::QwtCompassWindArrow ( Style  style,
const QColor &  light = Qt::white,
const QColor &  dark = Qt::gray 
)

Constructor

Parameters
styleArrow style
lightLight color
darkDark color

Member Function Documentation

void QwtCompassWindArrow::drawNeedle ( QPainter *  painter,
double  length,
QPalette::ColorGroup  colorGroup 
) const
protectedvirtual

Draw the needle

Parameters
painterPainter
lengthLength of the needle
colorGroupColor group, used for painting

Implements QwtDialNeedle.