Qwt User's Guide  6.1.3
QwtDialSimpleNeedle Class Reference

A needle for dial widgets. More...

#include <qwt_dial_needle.h>

Inheritance diagram for QwtDialSimpleNeedle:

Public Types

enum  Style { Arrow, Ray }
 Style of the needle. More...
 

Public Member Functions

 QwtDialSimpleNeedle (Style, bool hasKnob=true, const QColor &mid=Qt::gray, const QColor &base=Qt::darkGray)
 
void setWidth (double width)
 
double width () const
 
- 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

A needle for dial widgets.

The following colors are used:

  • QPalette::Mid
    Pointer
  • QPalette::Base
    Knob
See also
QwtDial, QwtCompass

Member Enumeration Documentation

Style of the needle.

Enumerator
Arrow 

Arrow.

Ray 

A straight line from the center.

Constructor & Destructor Documentation

QwtDialSimpleNeedle::QwtDialSimpleNeedle ( Style  style,
bool  hasKnob = true,
const QColor &  mid = Qt::gray,
const QColor &  base = Qt::darkGray 
)

Constructor

Parameters
styleStyle
hasKnobWith/Without knob
midMiddle color
baseBase color

Member Function Documentation

void QwtDialSimpleNeedle::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.

void QwtDialSimpleNeedle::setWidth ( double  width)

Set the width of the needle

Parameters
widthWidth
See also
width()
double QwtDialSimpleNeedle::width ( ) const
Returns
the width of the needle
See also
setWidth()