A class for drawing round scales. Más...

#include <qwt_round_scale_draw.h>

Diagrama de herencias de QwtRoundScaleDraw

Clases
class	PrivateData
Métodos públicos
	QwtRoundScaleDraw ()
	Constructor.
	QwtRoundScaleDraw (const QwtRoundScaleDraw &)
	Copy constructor.
virtual	~QwtRoundScaleDraw ()
	Destructor.
QwtRoundScaleDraw &	operator= (const QwtRoundScaleDraw &other)
	Assignment operator.
void	setRadius (int radius)
int	radius () const
void	moveCenter (int x, int y)
void	moveCenter (const QPoint &)
QPoint	center () const
	Get the center of the scale.
void	setAngleRange (double angle1, double angle2)
	Adjust the baseline circle segment for round scales.
virtual int	extent (const QPen &, const QFont &) const
Métodos protegidos
virtual void	drawTick (QPainter *p, double val, int len) const
virtual void	drawBackbone (QPainter *p) const
virtual void	drawLabel (QPainter *p, double val) const

Descripción detallada

A class for drawing round scales.

QwtRoundScaleDraw can be used to draw round scales. The circle segment can be adjusted by QwtRoundScaleDraw::setAngleRange(). The geometry of the scale can be specified with QwtRoundScaleDraw::moveCenter() and QwtRoundScaleDraw::setRadius().

After a scale division has been specified as a QwtScaleDiv object using QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s), the scale can be drawn with the QwtAbstractScaleDraw::draw() member.

Documentación del constructor y destructor

QwtRoundScaleDraw::QwtRoundScaleDraw ( )

Constructor.

The range of the scale is initialized to [0, 100], The center is set to (50, 50) with a radius of 50. The angle range is set to [-135, 135].

QwtRoundScaleDraw::QwtRoundScaleDraw ( const QwtRoundScaleDraw & other )

Copy constructor.

QwtRoundScaleDraw::~QwtRoundScaleDraw ( ) [virtual]

Destructor.

Documentación de las funciones miembro

QPoint QwtRoundScaleDraw::center ( ) const

Get the center of the scale.

void QwtRoundScaleDraw::drawBackbone ( QPainter * painter ) const [protected, virtual]

Draws the baseline of the scale

Parámetros:

painter Painter

Ver también:: drawTick(), drawLabel()

Implementa QwtAbstractScaleDraw.

void QwtRoundScaleDraw::drawLabel	(	QPainter *	painter,
		double	value
	)		const `[protected, virtual]`

Draws the label for a major scale tick

Parámetros:

painter	Painter
value	Value

Ver también:: drawTick(), drawBackbone()

Implementa QwtAbstractScaleDraw.

void QwtRoundScaleDraw::drawTick	(	QPainter *	painter,
		double	value,
		int	len
	)		const `[protected, virtual]`

Draw a tick

Parámetros:

painter	Painter
value	Value of the tick
len	Lenght of the tick

Ver también:: drawBackbone(), drawLabel()

Implementa QwtAbstractScaleDraw.

int QwtRoundScaleDraw::extent	(	const QPen &	pen,
		const QFont &	font
	)		const `[virtual]`

Calculate the extent of the scale

The extent is the distcance between the baseline to the outermost pixel of the scale draw. radius() + extent() is an upper limit for the radius of the bounding circle.

Parámetros:

pen	Pen that is used for painting backbone and ticks
font	Font used for painting the labels

Ver también:: setMinimumExtent(), minimumExtent()

Atención:: The implemented algo is not too smart and calculates only an upper limit, that might be a few pixels too large

Implementa QwtAbstractScaleDraw.

void QwtRoundScaleDraw::moveCenter ( const QPoint & center )

Move the center of the scale draw, leaving the radius unchanged

Parámetros:

center New center

Ver también:: setRadius

void QwtRoundScaleDraw::moveCenter	(	int	x,
		int	y
	)		`[inline]`

QwtRoundScaleDraw & QwtRoundScaleDraw::operator= ( const QwtRoundScaleDraw & other )

Assignment operator.

int QwtRoundScaleDraw::radius ( ) const

Get the radius

Radius is the radius of the backbone without ticks and labels.

Ver también:: setRadius(), extent()

void QwtRoundScaleDraw::setAngleRange	(	double	angle1,
		double	angle2
	)

Adjust the baseline circle segment for round scales.

The baseline will be drawn from min(angle1,angle2) to max(angle1, angle2). The default setting is [ -135, 135 ]. An angle of 0 degrees corresponds to the 12 o'clock position, and positive angles count in a clockwise direction.

Parámetros:

angle1
angle2	boundaries of the angle interval in degrees.

Atención:

The angle range is limited to [-360, 360] degrees. Angles exceeding this range will be clipped.
For angles more than 359 degrees above or below min(angle1, angle2), scale marks will not be drawn.
If you need a counterclockwise scale, use QwtScaleDiv::setRange

void QwtRoundScaleDraw::setRadius ( int radius )

Change of radius the scale

Radius is the radius of the backbone without ticks and labels.

Parámetros:

radius New Radius

Ver también:: moveCenter

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

src/qwt/src/qwt_round_scale_draw.h
src/qwt/src/qwt_round_scale_draw.cpp

Clases

Métodos públicos

Métodos protegidos

Descripción detallada

Documentación del constructor y destructor

Documentación de las funciones miembro