Referencia de la Clase QwtKnob

The Knob Widget. Más...

#include <qwt_knob.h>

Diagrama de herencias de QwtKnob

Lista de todos los miembros.

Clases
class	PrivateData
Tipos públicos
enum	Symbol { Line, Dot }
Métodos públicos
	QwtKnob (QWidget *parent=NULL)
	QwtKnob (QWidget *parent, const char *name)
virtual	~QwtKnob ()
	Destructor.
void	setKnobWidth (int w)
	Change the knob's width.
int	knobWidth () const
void	setTotalAngle (double angle)
	Set the total angle by which the knob can be turned.
double	totalAngle () const
void	setBorderWidth (int bw)
	Set the knob's border width.
int	borderWidth () const
void	setSymbol (Symbol)
	Set the symbol of the knob.
Symbol	symbol () const
virtual QSize	sizeHint () const
virtual QSize	minimumSizeHint () const
	Return a minimum size hint.
void	setScaleDraw (QwtRoundScaleDraw *)
const QwtRoundScaleDraw *	scaleDraw () const
QwtRoundScaleDraw *	scaleDraw ()
Métodos protegidos
virtual void	paintEvent (QPaintEvent *e)
	Repaint the knob.
virtual void	resizeEvent (QResizeEvent *e)
	Qt Resize Event.
void	draw (QPainter *p, const QRect &ur)
	Repaint the knob.
void	drawKnob (QPainter *p, const QRect &r)
	Draw the knob.
void	drawMarker (QPainter *p, double arc, const QColor &c)
	Draw the marker at the knob's front.
Propiedades
int	knobWidth
	Return the width of the knob.
int	borderWidth
	Return the border width.
double	totalAngle
	Return the total angle.
Symbol	symbol

---

Descripción detallada

The Knob Widget.

The QwtKnob widget imitates look and behaviour of a volume knob on a radio. It contains a scale around the knob which is set up automatically or can be configured manually (see QwtAbstractScale). Automatic scrolling is enabled when the user presses a mouse button on the scale. For a description of signals, slots and other members, see QwtAbstractSlider.

Ver también:

QwtAbstractSlider and QwtAbstractScale for the descriptions of the inherited members.

---

Documentación de las enumeraciones miembro de la clase

enum QwtKnob::Symbol

Symbol

Ver también:

QwtKnob::QwtKnob()

Valores de enumeraciones:

Line
Dot

---

Documentación del constructor y destructor

QwtKnob::QwtKnob

(

QWidget *

parent = NULL

)

[explicit]

Constructor

Parámetros:

parent

Parent widget

QwtKnob::QwtKnob	(	QWidget *	parent,
		const char *	name
	)		[explicit]

Constructor

Parámetros:

parent	Parent widget
name	Object name

QwtKnob::~QwtKnob

(

)

[virtual]

Destructor.

---

Documentación de las funciones miembro

int QwtKnob::borderWidth

(

)

const

void QwtKnob::draw	(	QPainter *	p,
		const QRect &	ur
	)		[protected]

Repaint the knob.

void QwtKnob::drawKnob	(	QPainter *	painter,
		const QRect &	r
	)		[protected]

Draw the knob.

Parámetros:

painter	painter
r	Bounding rectangle of the knob (without scale)

void QwtKnob::drawMarker	(	QPainter *	p,
		double	arc,
		const QColor &	c
	)		[protected]

Draw the marker at the knob's front.

Parámetros:

p	Painter
arc	Angle of the marker
c	Marker color

int QwtKnob::knobWidth

(

)

const

QSize QwtKnob::minimumSizeHint

(

)

const [virtual]

Return a minimum size hint.

Atención:

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

Reimplementado de QWidget.

void QwtKnob::paintEvent

(

QPaintEvent *

e

)

[protected, virtual]

Repaint the knob.

Reimplementado de QWidget.

void QwtKnob::resizeEvent

(

QResizeEvent *

e

)

[protected, virtual]

Qt Resize Event.

Reimplementado de QWidget.

const QwtRoundScaleDraw * QwtKnob::scaleDraw

(

)

const

Devuelve:

the scale draw of the knob

Ver también:

setScaleDraw()

QwtRoundScaleDraw * QwtKnob::scaleDraw

(

)

Devuelve:

the scale draw of the knob

Ver también:

setScaleDraw()

void QwtKnob::setBorderWidth

(

int

bw

)

Set the knob's border width.

Parámetros:

bw	new border width

void QwtKnob::setKnobWidth

(

int

w

)

Change the knob's width.

The specified width must be >= 5, or it will be clipped.

Parámetros:

w

New width

void QwtKnob::setScaleDraw

(

QwtRoundScaleDraw *

scaleDraw

)

Change the scale draw of the knob

For changing the labels of the scales, it is necessary to derive from QwtRoundScaleDraw and overload QwtRoundScaleDraw::label().

Ver también:

scaleDraw()

void QwtKnob::setSymbol

(

QwtKnob::Symbol

s

)

Set the symbol of the knob.

Ver también:

symbol()

void QwtKnob::setTotalAngle

(

double

angle

)

Set the total angle by which the knob can be turned.

Parámetros:

angle

Angle in degrees.

The default angle is 270 degrees. It is possible to specify an angle of more than 360 degrees so that the knob can be turned several times around its axis.

QSize QwtKnob::sizeHint

(

)

const [virtual]

Devuelve:

minimumSizeHint()

Reimplementado de QWidget.

Symbol QwtKnob::symbol

(

)

const

double QwtKnob::totalAngle

(

)

const

---

Documentación de propiedades

int QwtKnob::borderWidth [read, write]

Return the border width.

int QwtKnob::knobWidth [read, write]

Return the width of the knob.

QwtKnob::Symbol QwtKnob::symbol [read, write]

Devuelve:

symbol of the knob

Ver también:

setSymbol()

double QwtKnob::totalAngle [read, write]

Return the total angle.

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qwt/src/qwt_knob.h
• src/qwt/src/qwt_knob.cpp