#include <qwt_wheel.h>

Inheritance diagram for QwtWheel:

Public Member Functions
	QwtWheel (QWidget *parent=NULL)
virtual	~QwtWheel ()
int	internalBorder () const
double	mass () const
virtual QSize	minimumSizeHint () const
void	setInternalBorder (int width)
void	setMass (double val)
virtual void	setOrientation (Qt::Orientation)
void	setTickCnt (int cnt)
void	setTotalAngle (double angle)
void	setViewAngle (double angle)
void	setWheelWidth (int w)
virtual QSize	sizeHint () const
int	tickCnt () const
double	totalAngle () const
double	viewAngle () const
Public Member Functions inherited from QwtAbstractSlider
	QwtAbstractSlider (Qt::Orientation, QWidget *parent=NULL)
virtual	~QwtAbstractSlider ()
bool	isReadOnly () const
bool	isValid () const
Qt::Orientation	orientation () const
void	setTracking (bool enable)
void	setUpdateTime (int t)
void	setValid (bool valid)
void	stopMoving ()
Public Member Functions inherited from QwtDoubleRange
	QwtDoubleRange ()
virtual	~QwtDoubleRange ()
virtual void	incPages (int)
double	maxValue () const
double	minValue () const
int	pageSize () const
bool	periodic () const
void	setPeriodic (bool tf)
void	setRange (double vmin, double vmax, double vstep=0.0, int pagesize=1)
void	setStep (double)
double	step () const
double	value () const

Protected Member Functions
void	draw (QPainter *, const QRect &)
void	drawWheel (QPainter *, const QRect &)
void	drawWheelBackground (QPainter *, const QRect &)
virtual void	getScrollMode (const QPoint &, int &scrollMode, int &direction)
virtual double	getValue (const QPoint &)
void	layoutWheel (bool update=true)
virtual void	paintEvent (QPaintEvent *e)
virtual void	paletteChange (const QPalette &)
virtual void	resizeEvent (QResizeEvent *e)
void	setColorArray ()
virtual void	valueChange ()
Protected Member Functions inherited from QwtAbstractSlider
virtual void	keyPressEvent (QKeyEvent *e)
virtual void	mouseMoveEvent (QMouseEvent *e)
double	mouseOffset () const
virtual void	mousePressEvent (QMouseEvent *e)
virtual void	mouseReleaseEvent (QMouseEvent *e)
int	scrollMode () const
void	setMouseOffset (double)
virtual void	setPosition (const QPoint &)
virtual void	timerEvent (QTimerEvent *e)
virtual void	wheelEvent (QWheelEvent *e)
Protected Member Functions inherited from QwtDoubleRange
double	exactPrevValue () const
double	exactValue () const
double	prevValue () const
virtual void	rangeChange ()
virtual void	stepChange ()

Additional Inherited Members
Public Types inherited from QwtAbstractSlider
enum	ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage }
Public Slots inherited from QwtAbstractSlider
virtual void	fitValue (double val)
virtual void	incValue (int steps)
virtual void	setReadOnly (bool)
virtual void	setValue (double val)
Signals inherited from QwtAbstractSlider
void	sliderMoved (double value)
void	sliderPressed ()
void	sliderReleased ()
void	valueChanged (double value)

Detailed Description

The Wheel Widget.

The wheel widget can be used to change values over a very large range in very small steps. Using the setMass member, it can be configured as a flywheel.

See also:: The radio example.

Member Function Documentation

void QwtWheel::draw	(	QPainter *	painter,
		const QRect &
	)

protected

Redraw panel and wheel

Parameters:

painter Painter

void QwtWheel::drawWheel	(	QPainter *	painter,
		const QRect &	r
	)

protected

Redraw the wheel.

Parameters:

painter	painter
r	contents rectangle

void QwtWheel::drawWheelBackground	(	QPainter *	painter,
		const QRect &	r
	)

protected

Draw the Wheel's background gradient

Parameters:

painter	Painter
r	Bounding rectangle

void QwtWheel::getScrollMode	(	const QPoint &	p,
		int &	scrollMode,
		int &	direction
	)

protectedvirtual

Determine the scrolling mode and direction corresponding to a specified point.

Parameters:

p	point
scrollMode	scrolling mode
direction	direction

Implements QwtAbstractSlider.

int QwtWheel::internalBorder ( ) const

Returns:: Internal border width of the wheel.

See also:: setInternalBorder()

double QwtWheel::mass ( ) const

virtual

Returns:: mass

Reimplemented from QwtAbstractSlider.

QSize QwtWheel::minimumSizeHint ( ) const

virtual

Return a minimum size hint.

Warning:: The return value is based on the wheel width.

void QwtWheel::setInternalBorder ( int w )

Set the internal border width of the wheel.

The internal border must not be smaller than 1 and is limited in dependence on the wheel's size. Values outside the allowed range will be clipped.

The internal border defaults to 2.

Parameters:

w	border width

See also:: internalBorder()

void QwtWheel::setMass ( double val )

virtual

Set the mass of the wheel.

Assigning a mass turns the wheel into a flywheel.

Parameters:

val	the wheel's mass

Reimplemented from QwtAbstractSlider.

void QwtWheel::setOrientation ( Qt::Orientation o )

virtual

Set the wheel's orientation.

Parameters:

o	Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal.

See also:: QwtAbstractSlider::orientation()

Reimplemented from QwtAbstractSlider.

void QwtWheel::setTickCnt ( int cnt )

Adjust the number of grooves in the wheel's surface.

The number of grooves is limited to 6 <= cnt <= 50. Values outside this range will be clipped. The default value is 10.

Parameters:

cnt	Number of grooves per 360 degrees

See also:: tickCnt()

void QwtWheel::setTotalAngle ( double angle )

Set the total angle which the wheel can be turned.

One full turn of the wheel corresponds to an angle of 360 degrees. A total angle of n*360 degrees means that the wheel has to be turned n times around its axis to get from the minimum value to the maximum value.

The default setting of the total angle is 360 degrees.

Parameters:

angle total angle in degrees