QwtDial class provides a rounded range control. Más...

#include <qwt_dial.h>

Diagrama de herencias de QwtDial

Clases
class	PrivateData
Tipos públicos
enum	Shadow { Plain = QFrame::Plain, Raised = QFrame::Raised, Sunken = QFrame::Sunken }
	Frame shadow. Más...
enum	ScaleOptions { ScaleBackbone = 1, ScaleTicks = 2, ScaleLabel = 4 }
	see QwtDial::setScaleOptions Más...
enum	Mode { RotateNeedle, RotateScale }
Métodos públicos
	QwtDial (QWidget *parent=NULL)
	Constructor.
	QwtDial (QWidget parent, const char name)
	Constructor.
virtual	~QwtDial ()
	Destructor.
void	setFrameShadow (Shadow)
Shadow	frameShadow () const
bool	hasVisibleBackground () const
void	showBackground (bool)
void	setLineWidth (int)
int	lineWidth () const
void	setMode (Mode)
	Change the mode of the meter.
Mode	mode () const
virtual void	setWrapping (bool)
bool	wrapping () const
virtual void	setScale (int maxMajIntv, int maxMinIntv, double step=0.0)
void	setScaleArc (double min, double max)
void	setScaleOptions (int)
void	setScaleTicks (int minLen, int medLen, int majLen, int penWidth=1)
	See: QwtAbstractScaleDraw::setTickLength, QwtDialScaleDraw::setPenWidth.
double	minScaleArc () const
double	maxScaleArc () const
virtual void	setOrigin (double)
	Change the origin.
double	origin () const
virtual void	setNeedle (QwtDialNeedle *)
const QwtDialNeedle *	needle () const
QwtDialNeedle *	needle ()
QRect	boundingRect () const
QRect	contentsRect () const
virtual QRect	scaleContentsRect () const
virtual QSize	sizeHint () const
virtual QSize	minimumSizeHint () const
	Return a minimum size hint.
virtual void	setScaleDraw (QwtDialScaleDraw *)
QwtDialScaleDraw *	scaleDraw ()
	Return the scale draw.
const QwtDialScaleDraw *	scaleDraw () const
	Return the scale draw.
Métodos protegidos
virtual void	paintEvent (QPaintEvent *)
virtual void	resizeEvent (QResizeEvent *)
virtual void	keyPressEvent (QKeyEvent *)
virtual void	updateMask ()
	Update the mask of the dial.
virtual void	drawFrame (QPainter *p)
virtual void	drawContents (QPainter *) const
	Draw the contents inside the frame.
virtual void	drawFocusIndicator (QPainter *) const
virtual void	drawScale (QPainter *, const QPoint &center, int radius, double origin, double arcMin, double arcMax) const
virtual void	drawScaleContents (QPainter *painter, const QPoint &center, int radius) const
virtual void	drawNeedle (QPainter *, const QPoint &, int radius, double direction, QPalette::ColorGroup) const
virtual QwtText	scaleLabel (double) const
void	updateScale ()
virtual void	rangeChange ()
	QwtDoubleRange update hook.
virtual void	valueChange ()
	QwtDoubleRange update hook.
virtual double	getValue (const QPoint &)
virtual void	getScrollMode (const QPoint &, int &scrollMode, int &direction)
Propiedades
bool	visibleBackground
int	lineWidth
Shadow	frameShadow
Mode	mode
double	origin
bool	wrapping
Amigas
class	QwtDialScaleDraw

Descripción detallada

QwtDial class provides a rounded range control.

QwtDial is intended as base class for dial widgets like speedometers, compass widgets, clocks ...

A dial contains a scale and a needle indicating the current value of the dial. Depending on Mode one of them is fixed and the other is rotating. If not isReadOnly() the dial can be rotated by dragging the mouse or using keyboard inputs (see keyPressEvent()). A dial might be wrapping, what means a rotation below/above one limit continues on the other limit (f.e compass). The scale might cover any arc of the dial, its values are related to the origin() of the dial.

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

Ver también:: QwtCompass, QwtAnalogClock, QwtDialNeedle

Nota:: The examples/dials example shows different types of dials.

Documentación de las enumeraciones miembro de la clase

enum QwtDial::Mode

In case of RotateNeedle the needle is rotating, in case of RotateScale, the needle points to origin() and the scale is rotating.

Valores de enumeraciones:

RotateNeedle
RotateScale

enum QwtDial::ScaleOptions

see QwtDial::setScaleOptions

Valores de enumeraciones:

ScaleBackbone
ScaleTicks
ScaleLabel

enum QwtDial::Shadow

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.

Valores de enumeraciones:

Plain
Raised
Sunken

Documentación del constructor y destructor

QwtDial::QwtDial ( QWidget * parent = NULL ) [explicit]

Constructor.

Parámetros:

parent Parent widget

Create a dial widget with no scale and no needle. The default origin is 90.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.

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

Constructor.

Parámetros:

parent	Parent widget
name	Object name

Create a dial widget with no scale and no needle. The default origin is 90.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.

QwtDial::~QwtDial ( ) [virtual]

Destructor.

Documentación de las funciones miembro

QRect QwtDial::boundingRect ( ) const

Devuelve:: bounding rect of the dial including the frame

Ver también:: setLineWidth(), scaleContentsRect(), contentsRect()

QRect QwtDial::contentsRect ( ) const

Devuelve:: bounding rect of the circle inside the frame

Ver también:: setLineWidth(), scaleContentsRect(), boundingRect()

void QwtDial::drawContents ( QPainter * painter ) const [protected, virtual]

Draw the contents inside the frame.

QColorGroup::Background is the background color outside of the frame. QColorGroup::Base is the background color inside the frame. QColorGroup::Foreground is the background color inside the scale.

Parámetros:

painter Painter

Ver también:: boundingRect(), contentsRect(), scaleContentsRect(), QWidget::setPalette

void QwtDial::drawFocusIndicator ( QPainter * painter ) const [protected, virtual]

Draw a dotted round circle, if !isReadOnly()

Parámetros:

painter Painter

void QwtDial::drawFrame ( QPainter * painter ) [protected, virtual]

Draw the frame around the dial

Parámetros:

painter Painter

Ver también:: lineWidth(), frameShadow()

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

Draw the needle

Parámetros:

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

Reimplementado en QwtAnalogClock.

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

Draw the scale

Parámetros:

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

Ver también:: QwtAbstractScaleDraw::setAngleRange

void QwtDial::drawScaleContents	(	QPainter *	painter,
		const QPoint &	center,
		int	radius
	)		const `[protected, virtual]`

Draw the contents inside the scale

Paints nothing.

Parámetros:

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

Reimplementado en QwtCompass.

Shadow QwtDial::frameShadow ( ) const

void QwtDial::getScrollMode	(	const QPoint &	p,
		int &	scrollMode,
		int &	direction
	)		`[protected, virtual]`

Ver también:: QwtAbstractSlider::getScrollMode

Implementa QwtAbstractSlider.

double QwtDial::getValue ( const QPoint & pos ) [protected, virtual]

Find the value for a given position

Parámetros:

pos Position

Devuelve:: Value

Implementa QwtAbstractSlider.

bool QwtDial::hasVisibleBackground ( ) const

true when the area outside of the frame is visible

Ver también:: showBackground(), setMask()

void QwtDial::keyPressEvent ( QKeyEvent * e ) [protected, virtual]

Handles key events

Key_Down, KeyLeft
Decrement by 1
Key_Prior
Decrement by pageSize()
Key_Home
Set the value to minValue()

Key_Up, KeyRight
Increment by 1
Key_Next
Increment by pageSize()
Key_End
Set the value to maxValue()

Ver también:: isReadOnly()

Reimplementado de QwtAbstractSlider.

Reimplementado en QwtCompass.

int QwtDial::lineWidth ( ) const

double QwtDial::maxScaleArc ( ) const

Devuelve:: Upper limit of the scale arc

QSize QwtDial::minimumSizeHint ( ) const [virtual]

Return a minimum size hint.

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

Reimplementado de QWidget.

double QwtDial::minScaleArc ( ) const

Devuelve:: Lower limit of the scale arc

Mode QwtDial::mode ( ) const

QwtDialNeedle * QwtDial::needle ( )

Devuelve:: needle

Ver también:: setNeedle()

const QwtDialNeedle * QwtDial::needle ( ) const

Devuelve:: needle

Ver también:: setNeedle()

double QwtDial::origin ( ) const

void QwtDial::paintEvent ( QPaintEvent * e ) [protected, virtual]

Paint the dial

Parámetros:

e	Paint event

Reimplementado de QWidget.

void QwtDial::rangeChange ( ) [protected, virtual]

QwtDoubleRange update hook.

Reimplementado de QwtDoubleRange.

void QwtDial::resizeEvent ( QResizeEvent * e ) [protected, virtual]

Resize the dial widget

Parámetros:

e	Resize event

Reimplementado de QWidget.

QRect QwtDial::scaleContentsRect ( ) const [virtual]

Devuelve:: rect inside the scale

Ver también:: setLineWidth(), boundingRect(), contentsRect()

const QwtDialScaleDraw * QwtDial::scaleDraw ( ) const

Return the scale draw.

QwtDialScaleDraw * QwtDial::scaleDraw ( )

Return the scale draw.

QwtText QwtDial::scaleLabel ( double value ) const [protected, virtual]

Find the label for a value

Parámetros:

value Value

Devuelve:: label

Reimplementado en QwtAnalogClock y QwtCompass.

void QwtDial::setFrameShadow ( Shadow shadow )

Sets the frame shadow value from the frame style.

Parámetros:

shadow Frame shadow

Ver también:: setLineWidth(), QFrame::setFrameShadow()

void QwtDial::setLineWidth ( int lineWidth )

Sets the line width

Parámetros:

lineWidth Line width

Ver también:: setFrameShadow()

void QwtDial::setMode ( Mode mode )

Change the mode of the meter.

Parámetros:

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.

Ver también:: mode(), setValue(), setOrigin()

void QwtDial::setNeedle ( QwtDialNeedle * needle ) [virtual]

Set a needle for the dial

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

Parámetros:

needle Needle

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

void QwtDial::setOrigin ( double origin ) [virtual]

Change the origin.

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

Parámetros:

origin New origin

Ver también:: origin()

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

Change the intervals of the scale

Ver también:: QwtAbstractScaleDraw::setScale

void QwtDial::setScaleArc	(	double	minArc,
		double	maxArc
	)

Change the arc of the scale

Parámetros:

minArc	Lower limit
maxArc	Upper limit

void QwtDial::setScaleDraw ( QwtDialScaleDraw * scaleDraw ) [virtual]

Set an individual scale draw

Parámetros:

scaleDraw Scale draw

Atención:: The previous scale draw is deleted

void QwtDial::setScaleOptions ( int options )

A wrapper method for accessing the scale draw.

options == 0
No visible scale: setScaleDraw(NULL)
options & ScaleBackbone
En/disable the backbone of the scale.
options & ScaleTicks
En/disable the ticks of the scale.
options & ScaleLabel
En/disable scale labels

Ver también:: QwtAbstractScaleDraw::enableComponent

void QwtDial::setScaleTicks	(	int	minLen,
		int	medLen,
		int	majLen,
		int	penWidth = `1`
	)

See: QwtAbstractScaleDraw::setTickLength, QwtDialScaleDraw::setPenWidth.

void QwtDial::setWrapping ( bool wrapping ) [virtual]

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

Parámetros:

wrapping en/disables wrapping

Ver también:: wrapping(), QwtDoubleRange::periodic()

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

void QwtDial::showBackground ( bool show )

Show/Hide the area outside of the frame

Parámetros:

show	Show if true, hide if false

Ver también:: hasVisibleBackground(), setMask()

Atención:: When QwtDial is a toplevel widget the window border might disappear too.

QSize QwtDial::sizeHint ( ) const [virtual]

Devuelve:: Size hint

Reimplementado de QWidget.

void QwtDial::updateMask ( ) [protected, virtual]

Update the mask of the dial.

In case of "hasVisibleBackground() == false", the backgound is transparent by a mask.

Ver también:: showBackground(), hasVisibleBackground()

Reimplementado de QWidget.

void QwtDial::updateScale ( ) [protected]

Update the scale with the current attributes

Ver también:: setScale()

void QwtDial::valueChange ( ) [protected, virtual]

QwtDoubleRange update hook.

Reimplementado de QwtAbstractSlider.

bool QwtDial::wrapping ( ) const

Documentación de las funciones relacionadas y clases amigas

friend class QwtDialScaleDraw [friend]

Documentación de propiedades

QwtDial::Shadow QwtDial::frameShadow [read, write]

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

int QwtDial::lineWidth [read, write]

Devuelve:: Line width of the frame

Ver también:: setLineWidth(), frameShadow(), lineWidth()

QwtDial::Mode QwtDial::mode [read, write]

Devuelve:: 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.