QwtCompass Class Reference

#include <qwt_compass.h>

Inherits QwtDial.

List of all members.

Public Types
enum	Direction {   Clockwise,   CounterClockwise }
enum	Mode {   RotateNeedle,   RotateScale }
enum	ScrollMode {   ScrNone,   ScrMouse,   ScrTimer,   ScrDirect,   ScrPage }
enum	Shadow {   Plain = QFrame::Plain,   Raised = QFrame::Raised,   Sunken = QFrame::Sunken }
Public Slots
virtual void	fitValue (double val)
virtual void	incValue (int steps)
virtual void	setReadOnly (bool)
virtual void	setValue (double val)
Signals
void	sliderMoved (double value)
void	sliderPressed ()
void	sliderReleased ()
void	valueChanged (double value)
Public Member Functions
QRectF	boundingRect () const
Direction	direction () const
Shadow	frameShadow () const
virtual void	incPages (int)
QRectF	innerRect () const
bool	isReadOnly () const
bool	isValid () const
const QMap< double, QString > &	labelMap () const
QMap< double, QString > &	labelMap ()
int	lineWidth () const
virtual double	mass () const
double	maxScaleArc () const
double	maxValue () const
virtual QSize	minimumSizeHint () const
double	minScaleArc () const
double	minValue () const
Mode	mode () const
const QwtDialNeedle *	needle () const
QwtDialNeedle *	needle ()
Qt::Orientation	orientation () const
double	origin () const
int	pageSize () const
bool	periodic () const
	QwtCompass (QWidget *parent=NULL)
const QwtCompassRose *	rose () const
QwtCompassRose *	rose ()
QwtDialScaleDraw *	scaleDraw ()
const QwtDialScaleDraw *	scaleDraw () const
virtual QRectF	scaleInnerRect () const
void	setDirection (Direction)
void	setFrameShadow (Shadow)
void	setLabelMap (const QMap< double, QString > &map)
void	setLineWidth (int)
virtual void	setMass (double val)
void	setMode (Mode)
virtual void	setNeedle (QwtDialNeedle *)
virtual void	setOrientation (Qt::Orientation o)
virtual void	setOrigin (double)
void	setPeriodic (bool tf)
void	setRange (double vmin, double vmax, double vstep=0.0, int pagesize=1)
void	setRose (QwtCompassRose *rose)
virtual void	setScale (int maxMajIntv, int maxMinIntv, double step=0.0)
void	setScaleArc (double min, double max)
void	setScaleComponents (QwtAbstractScaleDraw::ScaleComponents)
virtual void	setScaleDraw (QwtDialScaleDraw *)
void	setScaleTicks (int minLen, int medLen, int majLen, int penWidth=1)
void	setStep (double)
void	setTracking (bool enable)
void	setUpdateTime (int t)
void	setValid (bool valid)
virtual void	setWrapping (bool)
virtual QSize	sizeHint () const
double	step () const
void	stopMoving ()
double	value () const
bool	wrapping () const
virtual	~QwtCompass ()
Protected Member Functions
virtual void	drawContents (QPainter *) const
virtual void	drawFocusIndicator (QPainter *) const
virtual void	drawFrame (QPainter *p)
virtual void	drawNeedle (QPainter *, const QPointF &, double radius, double direction, QPalette::ColorGroup) const
virtual void	drawRose (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup) const
virtual void	drawScale (QPainter *, const QPointF &center, double radius, double origin, double arcMin, double arcMax) const
virtual void	drawScaleContents (QPainter *, const QPointF &center, double radius) const
double	exactPrevValue () const
double	exactValue () const
virtual void	getScrollMode (const QPoint &, QwtAbstractSlider::ScrollMode &, int &direction) const
virtual double	getValue (const QPoint &)
virtual void	keyPressEvent (QKeyEvent *)
virtual void	mouseMoveEvent (QMouseEvent *e)
double	mouseOffset () const
virtual void	mousePressEvent (QMouseEvent *e)
virtual void	mouseReleaseEvent (QMouseEvent *e)
virtual void	paintEvent (QPaintEvent *)
double	prevValue () const
virtual void	rangeChange ()
virtual QwtText	scaleLabel (double value) const
int	scrollMode () const
void	setMouseOffset (double)
virtual void	setPosition (const QPoint &)
virtual void	stepChange ()
virtual void	timerEvent (QTimerEvent *e)
void	updateScale ()
virtual void	valueChange ()
virtual void	wheelEvent (QWheelEvent *e)

---

Detailed Description

A Compass Widget.

QwtCompass is a widget to display and enter directions. It consists of a scale, an optional needle and rose.

Note:

The examples/dials example shows how to use QwtCompass.

---

Member Enumeration Documentation

enum QwtDial::Direction [inherited]

Direction of the dial.

Enumerator:

Clockwise	Clockwise.
CounterClockwise	Counter clockwise.

enum QwtDial::Mode [inherited]

Mode controlling wether the needle or the scale is rotating.

Enumerator:

RotateNeedle	The needle is rotating.
RotateScale	The needle is fixed, the scales are rotating.

enum QwtAbstractSlider::ScrollMode [inherited]

Scroll mode

See also:

getScrollMode()

Enumerator:

ScrNone	Scrolling switched off. Don't change the value.
ScrMouse	Change the value while the user keeps the button pressed and moves the mouse.
ScrTimer	Automatic scrolling. Increment the value in the specified direction as long as the user keeps the button pressed.
ScrPage	Automatic scrolling. Same as ScrTimer, but increment by page size.

enum QwtDial::Shadow [inherited]

Frame shadow.

Unfortunately it is not possible to use QFrame::Shadow as a property of a widget that is not derived from QFrame. The following enum is made for the designer only. It is safe to use QFrame::Shadow instead.

Enumerator:

Plain	QFrame::Plain.
Raised	QFrame::Raised.
Sunken	QFrame::Sunken.

---

Constructor & Destructor Documentation

QwtCompass::QwtCompass

(

QWidget *

parent = NULL

)

[explicit]

Constructor.

Parameters:

parent

Parent widget

Create a compass widget with a scale, no needle and no rose. The default origin is 270.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.

QwtCompass::~QwtCompass

(

)

[virtual]

Destructor.

---

Member Function Documentation

QRectF QwtDial::boundingRect

(

)

const [inherited]

Returns:

bounding rect of the dial including the frame

See also:

setLineWidth(), scaleInnerRect(), innerRect()

QwtDial::Direction QwtDial::direction

(

)

const [inherited]

Returns:

Direction of the dial

The default direction of a dial is QwtDial::Clockwise

See also:

setDirection()

void QwtDial::drawContents

(

QPainter *

painter

)

const [protected, virtual, inherited]

Draw the contents inside the frame.

QPalette::Window is the background color outside of the frame. QPalette::Base is the background color inside the frame. QPalette::WindowText is the background color inside the scale.

Parameters:

painter

Painter

See also:

boundingRect(), innerRect(), scaleInnerRect(), QWidget::setPalette()

void QwtDial::drawFocusIndicator

(

QPainter *

painter

)

const [protected, virtual, inherited]

Draw a dotted round circle, if !isReadOnly()

Parameters:

painter

Painter

void QwtDial::drawFrame

(

QPainter *

painter

)

[protected, virtual, inherited]

Draw the frame around the dial

Parameters:

painter

Painter

See also:

lineWidth(), frameShadow()

void QwtDial::drawNeedle	(	QPainter *	painter,
		const QPointF &	center,
		double	radius,
		double	direction,
		QPalette::ColorGroup	cg
	)		const [protected, virtual, inherited]

Draw the needle

Parameters:

painter	Painter
center	Center of the dial
radius	Length for the needle
direction	Direction of the needle in degrees, counter clockwise
cg	ColorGroup

Reimplemented in QwtAnalogClock.

void QwtCompass::drawRose	(	QPainter *	painter,
		const QPointF &	center,
		double	radius,
		double	north,
		QPalette::ColorGroup	cg
	)		const [protected, virtual]

Draw the compass rose

Parameters:

painter	Painter
center	Center of the compass
radius	of the circle, where to paint the rose
north	Direction pointing north, in degrees counter clockwise
cg	Color group

void QwtDial::drawScale	(	QPainter *	painter,
		const QPointF &	center,
		double	radius,
		double	origin,
		double	minArc,
		double	maxArc
	)		const [protected, virtual, inherited]

Draw the scale

Parameters:

painter	Painter
center	Center of the dial
radius	Radius of the scale
origin	Origin of the scale
minArc	Minimum of the arc
maxArc	Minimum of the arc

See also:

QwtRoundScaleDraw::setAngleRange()

void QwtCompass::drawScaleContents	(	QPainter *	painter,
		const QPointF &	center,
		double	radius
	)		const [protected, virtual]

Draw the contents of the scale

Parameters:

painter	Painter
center	Center of the content circle
radius	Radius of the content circle

Reimplemented from QwtDial.

double QwtDoubleRange::exactPrevValue

(

)

const [protected, inherited]

Returns the exact previous value.

double QwtDoubleRange::exactValue

(

)

const [protected, inherited]

Returns the exact value.

The exact value is the value which QwtDoubleRange::value would return if the value were not adjusted to the step raster. It differs from the current value only if fitValue() or incValue() have been used before. This function is intended for internal use in derived classes.

void QwtAbstractSlider::fitValue

(

double

value

)

[virtual, slot, inherited]

Set the slider's value to the nearest integer multiple of the step size.

Parameters:

value

Value

See also:

setValue(), incValue()

Reimplemented from QwtDoubleRange.

QwtDial::Shadow QwtDial::frameShadow

(

)

const [inherited]

Returns:

Frame shadow /sa setFrameShadow(), lineWidth(), QFrame::frameShadow

void QwtDial::getScrollMode	(	const QPoint &	pos,
		QwtAbstractSlider::ScrollMode &	scrollMode,
		int &	direction
	)		const [protected, virtual, inherited]

See QwtAbstractSlider::getScrollMode()

Parameters:

pos	point where the mouse was pressed

Return values:

scrollMode	The scrolling mode
direction	direction: 1, 0, or -1.

See also:

QwtAbstractSlider::getScrollMode()

Implements QwtAbstractSlider.

double QwtDial::getValue

(

const QPoint &

pos

)

[protected, virtual, inherited]

Find the value for a given position

Parameters:

pos

Position

Returns:

Value

Implements QwtAbstractSlider.

void QwtDoubleRange::incPages

(

int

nPages

)

[virtual, inherited]

Increment the value by a specified number of pages.

Parameters:

nPages

Number of pages to increment. A negative number decrements the value.

Warning:

The Page size is specified in the constructor.

void QwtAbstractSlider::incValue

(

int

steps

)

[virtual, slot, inherited]

Increment the value by a specified number of steps.

Parameters:

steps

number of steps

See also:

setValue()

Reimplemented from QwtDoubleRange.

QRectF QwtDial::innerRect

(

)

const [inherited]

Returns:

bounding rect of the circle inside the frame

See also:

setLineWidth(), scaleInnerRect(), boundingRect()

bool QwtAbstractSlider::isReadOnly

(

)

const [inherited]

In read only mode the slider can't be controlled by mouse or keyboard.

Returns:

true if read only

See also:

setReadOnly()

bool QwtAbstractSlider::isValid

(

)

const [inline, inherited]

See also:

QwtDblRange::isValid()

Reimplemented from QwtDoubleRange.

void QwtCompass::keyPressEvent

(

QKeyEvent *

kev

)

[protected, virtual]

Handles key events

Beside the keys described in QwtDial::keyPressEvent numbers from 1-9 (without 5) set the direction according to their position on the num pad.

See also:

isReadOnly()

Reimplemented from QwtDial.

const QMap< double, QString > & QwtCompass::labelMap

(

)

const

Returns:

map, mapping values to labels

See also:

setLabelMap()

QMap< double, QString > & QwtCompass::labelMap

(

)

Returns:

map, mapping values to labels

See also:

setLabelMap()

int QwtDial::lineWidth

(

)

const [inherited]

Returns:

Line width of the frame

See also:

setLineWidth(), frameShadow(), lineWidth()

double QwtAbstractSlider::mass

(

)

const [virtual, inherited]

Returns:

mass

See also:

setMass()

Reimplemented in QwtWheel.

double QwtDial::maxScaleArc

(

)

const [inherited]

Returns:

Upper limit of the scale arc

double QwtDoubleRange::maxValue

(

)

const [inherited]

Returns the value of the second border of the range.

maxValue returns the value which has been specified as the second parameter in QwtDoubleRange::setRange.

See also:

setRange()

Reimplemented in QwtCounter.

QSize QwtDial::minimumSizeHint

(

)

const [virtual, inherited]

Return a minimum size hint.

Warning:

The return value of QwtDial::minimumSizeHint() depends on the font and the scale.

double QwtDial::minScaleArc

(

)

const [inherited]

Returns:

Lower limit of the scale arc

double QwtDoubleRange::minValue

(

)

const [inherited]

Returns the value at the first border of the range.

minValue returns the value which has been specified as the first parameter in setRange().

See also:

setRange()

Reimplemented in QwtCounter.

QwtDial::Mode QwtDial::mode

(

)

const [inherited]

Returns:

mode of the dial.

The value of the dial is indicated by the difference between the origin and the direction of the needle. In case of QwtDial::RotateNeedle the scale arc is fixed to the origin() and the needle is rotating, in case of QwtDial::RotateScale, the needle points to origin() and the scale is rotating.

The default mode is QwtDial::RotateNeedle.

See also:

setMode(), origin(), setScaleArc(), value()

void QwtAbstractSlider::mouseMoveEvent

(

QMouseEvent *

e

)

[protected, virtual, inherited]

Mouse Move Event handler

Parameters:

e	Mouse event

double QwtAbstractSlider::mouseOffset

(

)

const [protected, inherited]

See also:

setMouseOffset()

void QwtAbstractSlider::mousePressEvent

(

QMouseEvent *

e

)

[protected, virtual, inherited]

Mouse press event handler

Parameters:

e	Mouse event

void QwtAbstractSlider::mouseReleaseEvent

(

QMouseEvent *

e

)

[protected, virtual, inherited]

Mouse Release Event handler

Parameters:

e	Mouse event

const QwtDialNeedle * QwtDial::needle

(

)

const [inherited]

Returns:

needle

See also:

setNeedle()

QwtDialNeedle * QwtDial::needle

(

)

[inherited]

Returns:

needle

See also:

setNeedle()

Qt::Orientation QwtAbstractSlider::orientation

(

)

const [inherited]

Returns:

Orientation

See also:

setOrientation()

double QwtDial::origin

(

)

const [inherited]

The origin is the angle where scale and needle is relative to.

Returns:

Origin of the dial

See also:

setOrigin()

int QwtDoubleRange::pageSize

(

)

const [inherited]

Returns the page size in steps.

void QwtDial::paintEvent

(

QPaintEvent *

event

)

[protected, virtual, inherited]

Paint the dial

Parameters:

event

Paint event

bool QwtDoubleRange::periodic

(

)

const [inherited]

Returns true if the range is periodic.

See also:

setPeriodic()

double QwtDoubleRange::prevValue

(

)

const [protected, inherited]

Returns the previous value.

void QwtDial::rangeChange

(

)

[protected, virtual, inherited]

QwtDoubleRange update hook.

Reimplemented from QwtDoubleRange.

const QwtCompassRose * QwtCompass::rose

(

)

const

Returns:

rose

See also:

setRose()

QwtCompassRose * QwtCompass::rose

(

)

Returns:

rose

See also:

setRose()

QwtDialScaleDraw * QwtDial::scaleDraw

(

)

[inherited]

Return the scale draw.

const QwtDialScaleDraw * QwtDial::scaleDraw

(

)

const [inherited]

Return the scale draw.

QRectF QwtDial::scaleInnerRect

(

)

const [virtual, inherited]

Returns:

rect inside the scale

See also:

setLineWidth(), boundingRect(), innerRect()

QwtText QwtCompass::scaleLabel

(

double

value

)

const [protected, virtual]

Map a value to a corresponding label

Parameters:

value

Value that will be mapped

Returns:

Label, or QString::null

label() looks in a map for a corresponding label for value or return an null text.

See also:

labelMap(), setLabelMap()

Reimplemented from QwtDial.

int QwtAbstractSlider::scrollMode

(

)

const [protected, inherited]

sa ScrollMode

void QwtDial::setDirection

(

Direction

direction

)

[inherited]

Set the direction of the dial (clockwise/counterclockwise)

Parameters:

direction

Direction

See also:

direction()

void QwtDial::setFrameShadow

(

Shadow

shadow

)

[inherited]

Sets the frame shadow value from the frame style.

Parameters:

shadow

Frame shadow

See also:

setLineWidth(), QFrame::setFrameShadow()

void QwtCompass::setLabelMap

(

const QMap< double, QString > &

map

)

Set a map, mapping values to labels.

Parameters:

map	value to label map

The values of the major ticks are found by looking into this map. The default map consists of the labels N, NE, E, SE, S, SW, W, NW.

Warning:

The map will have no effect for values that are no major tick values. Major ticks can be changed by QwtScaleDraw::setScale

See also:

labelMap(), scaleDraw(), setScale()

void QwtDial::setLineWidth

(

int

lineWidth

)

[inherited]

Sets the line width

Parameters:

lineWidth

Line width

See also:

setFrameShadow()

void QwtAbstractSlider::setMass

(

double

val

)

[virtual, inherited]

Set the slider's mass for flywheel effect.

If the slider's mass is greater then 0, it will continue to move after the mouse button has been released. Its speed decreases with time at a rate depending on the slider's mass. A large mass means that it will continue to move for a long time.

Derived widgets may overload this function to make it public.

Parameters:

val	New mass in kg

See also:

mass()

Reimplemented in QwtWheel.

void QwtDial::setMode

(

Mode

mode

)

[inherited]

Change the mode of the meter.

Parameters:

mode

New mode

The value of the meter is indicated by the difference between north of the scale and the direction of the needle. In case of QwtDial::RotateNeedle north is pointing to the origin() and the needle is rotating, in case of QwtDial::RotateScale, the needle points to origin() and the scale is rotating.

The default mode is QwtDial::RotateNeedle.

See also:

mode(), setValue(), setOrigin()

void QwtAbstractSlider::setMouseOffset

(

double

offset

)

[protected, inherited]

See also:

mouseOffset()

void QwtDial::setNeedle

(

QwtDialNeedle *

needle

)

[virtual, inherited]

Set a needle for the dial

Qwt is missing a set of good looking needles. Contributions are very welcome.

Parameters:

needle

Needle

Warning:

The needle will be deleted, when a different needle is set or in ~QwtDial()

void QwtAbstractSlider::setOrientation

(

Qt::Orientation

o

)

[virtual, inherited]

Set the orientation.

Parameters:

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

Reimplemented in QwtSlider, and QwtWheel.

void QwtDial::setOrigin

(

double

origin

)

[virtual, inherited]

Change the origin.

The origin is the angle where scale and needle is relative to.

Parameters:

origin

New origin

See also:

origin()

void QwtDoubleRange::setPeriodic

(

bool

tf

)

[inherited]

Make the range periodic.

When the range is periodic, the value will be set to a point inside the interval such that

point = value + n * width 

if the user tries to set a new value which is outside the range. If the range is nonperiodic (the default), values outside the range will be clipped.

Parameters:

tf	true for a periodic range

void QwtAbstractSlider::setPosition

(

const QPoint &

p

)

[protected, virtual, inherited]

Move the slider to a specified point, adjust the value and emit signals if necessary.

void QwtDoubleRange::setRange	(	double	vmin,
		double	vmax,
		double	vstep = 0.0,
		int	pageSize = 1
	)		[inherited]

Specify range and step size.

Parameters:

vmin	lower boundary of the interval
vmax	higher boundary of the interval
vstep	step width
pageSize	page size in steps

Warning:

• A change of the range changes the value if it lies outside the new range. The current value will *not* be adjusted to the new step raster.
• vmax < vmin is allowed.
• If the step size is left out or set to zero, it will be set to 1/100 of the interval length.
• If the step size has an absurd value, it will be corrected to a better one.

void QwtAbstractSlider::setReadOnly

(

bool

readOnly

)

[virtual, slot, inherited]

En/Disable read only mode

In read only mode the slider can't be controlled by mouse or keyboard.

Parameters:

readOnly

Enables in case of true

See also:

isReadOnly()

void QwtCompass::setRose

(

QwtCompassRose *

rose

)

Set a rose for the compass

Parameters:

rose	Compass rose

Warning:

The rose will be deleted, when a different rose is set or in ~QwtCompass

See also:

rose()

void QwtDial::setScale	(	int	maxMajIntv,
		int	maxMinIntv,
		double	step = 0.0
	)		[virtual, inherited]

Change the intervals of the scale

Parameters:

maxMajIntv	Maximum for the number of major steps
maxMinIntv	Maximum number of minor steps
step	Step size

See also:

QwtScaleEngine::divideScale()

void QwtDial::setScaleArc	(	double	minArc,
		double	maxArc
	)		[inherited]

Change the arc of the scale

Parameters:

minArc	Lower limit
maxArc	Upper limit

void QwtDial::setScaleComponents

(

QwtAbstractScaleDraw::ScaleComponents

components

)

[inherited]

A wrapper method for accessing the scale draw.

Parameters:

components

Scale components

See also:

QwtAbstractScaleDraw::enableComponent()

void QwtDial::setScaleDraw

(

QwtDialScaleDraw *

scaleDraw

)

[virtual, inherited]

Set an individual scale draw

Parameters:

scaleDraw

Scale draw

Warning:

The previous scale draw is deleted

void QwtDial::setScaleTicks	(	int	minLen,
		int	medLen,
		int	majLen,
		int	penWidth = 1
	)		[inherited]

Assign length and width of the ticks

Parameters:

minLen	Length of the minor ticks
medLen	Length of the medium ticks
majLen	Length of the major ticks
penWidth	Width of the pen for all ticks

See also:

QwtAbstractScaleDraw::setTickLength(), QwtDialScaleDraw::setPenWidth()

void QwtDoubleRange::setStep

(

double

vstep

)

[inherited]

Change the step raster.

Parameters:

vstep

new step width

Warning:

The value will not be adjusted to the new step raster.

Reimplemented in QwtCounter.

void QwtAbstractSlider::setTracking

(

bool

enable

)

[inherited]

Enables or disables tracking.

If tracking is enabled, the slider emits a valueChanged() signal whenever its value changes (the default behaviour). If tracking is disabled, the value changed() signal will only be emitted if:

• the user releases the mouse button and the value has changed or
• at the end of automatic scrolling.

Tracking is enabled by default.

Parameters:

enable

true (enable) or false (disable) tracking.

void QwtAbstractSlider::setUpdateTime

(

int

t

)

[inherited]

Specify the update interval for automatic scrolling.

Parameters:

t	update interval in milliseconds

See also:

getScrollMode()

void QwtAbstractSlider::setValid

(

bool

valid

)

[inline, inherited]

Parameters:

valid

true/false

See also:

QwtDblRange::isValid()

Reimplemented from QwtDoubleRange.

void QwtAbstractSlider::setValue

(

double

val

)

[virtual, slot, inherited]

Move the slider to a specified value.

This function can be used to move the slider to a value which is not an integer multiple of the step size.

Parameters:

val

new value

See also:

fitValue()

Reimplemented from QwtDoubleRange.

void QwtDial::setWrapping

(

bool

wrapping

)

[virtual, inherited]

Sets whether it is possible to step the value from the highest value to the lowest value and vice versa to on.

Parameters:

wrapping

en/disables wrapping

See also:

wrapping(), QwtDoubleRange::periodic()

Note:

The meaning of wrapping is like the wrapping property of QSpinBox, but not like it is used in QDial.

QSize QwtDial::sizeHint

(

)

const [virtual, inherited]

Returns:

Size hint

void QwtAbstractSlider::sliderMoved

(

double

value

)

[signal, inherited]

This signal is emitted when the user moves the slider with the mouse.

Parameters:

value

new value

void QwtAbstractSlider::sliderPressed

(

)

[signal, inherited]

This signal is emitted when the user presses the movable part of the slider (start ScrMouse Mode).

void QwtAbstractSlider::sliderReleased

(

)

[signal, inherited]

This signal is emitted when the user releases the movable part of the slider.

double QwtDoubleRange::step

(

)

const [inherited]

Returns:

the step size

See also:

setStep(), setRange()

Reimplemented in QwtCounter.

void QwtDoubleRange::stepChange

(

)

[protected, virtual, inherited]

Notify a change of the step size.

This virtual function is called whenever the step size changes. The default implementation does nothing.

void QwtAbstractSlider::stopMoving

(

)

[inherited]

Stop updating if automatic scrolling is active.

void QwtAbstractSlider::timerEvent

(

QTimerEvent *

e

)

[protected, virtual, inherited]

Qt timer event

Parameters:

e	Timer event

void QwtDial::updateScale

(

)

[protected, inherited]

Update the scale with the current attributes

See also:

setScale()

double QwtDoubleRange::value

(

)

const [inherited]

Returns the current value.

Reimplemented in QwtCounter.

void QwtDial::valueChange

(

)

[protected, virtual, inherited]

QwtDoubleRange update hook.

Reimplemented from QwtAbstractSlider.

void QwtAbstractSlider::valueChanged

(

double

value

)

[signal, inherited]

Notify a change of value.

In the default setting (tracking enabled), this signal will be emitted every time the value changes ( see setTracking() ).

Parameters:

value

new value

void QwtAbstractSlider::wheelEvent

(

QWheelEvent *

e

)

[protected, virtual, inherited]

Wheel Event handler

Parameters:

e	Whell event

bool QwtDial::wrapping

(

)

const [inherited]

wrapping() holds whether it is possible to step the value from the highest value to the lowest value and vice versa.

See also:

setWrapping(), QwtDoubleRange::setPeriodic()

Note:

The meaning of wrapping is like the wrapping property of QSpinBox, but not like it is used in QDial.