A Compass Widget 更多...

#include <qwt_compass.h>

类 QwtCompass 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtCompass (QWidget *parent=nullptr)
	Constructor

void	setRose (QwtCompassRose *rose)
	Set a rose for the compass

const QwtCompassRose *	rose () const
	Get the compass rose

QwtCompassRose *	rose ()
	Get the compass rose

Public 成员函数继承自 QwtDial
	QwtDial (QWidget *parent=nullptr)
	Constructor

	~QwtDial () override
	Destructor

void	setFrameShadow (Shadow)
	Set the frame shadow

Shadow	frameShadow () const
	Return the frame shadow

void	setLineWidth (int)
	Set the line width

int	lineWidth () const
	Return the line width

void	setMode (Mode)
	Set the mode

Mode	mode () const
	Return the mode

void	setScaleArc (double minArc, double maxArc)
	Set the scale arc range

void	setMinScaleArc (double)
	Set the minimum scale arc

double	minScaleArc () const
	Return the minimum scale arc

void	setMaxScaleArc (double)
	Set the maximum scale arc

double	maxScaleArc () const
	Return the maximum scale arc

virtual void	setOrigin (double)
	Set the origin

double	origin () const
	Return the origin

void	setNeedle (QwtDialNeedle *)
	Set the needle

const QwtDialNeedle *	needle () const
	Return the needle (const version)

QwtDialNeedle *	needle ()
	Return the needle

QRect	boundingRect () const
	Return the bounding rectangle

QRect	innerRect () const
	Return the inner rectangle

virtual QRect	scaleInnerRect () const
	Return the scale inner rectangle

virtual QSize	sizeHint () const override
	Return the size hint

virtual QSize	minimumSizeHint () const override
	Return the minimum size hint

void	setScaleDraw (QwtRoundScaleDraw *)
	Set the scale draw

QwtRoundScaleDraw *	scaleDraw ()
	Return the scale draw

const QwtRoundScaleDraw *	scaleDraw () const
	Return the scale draw (const version)

Public 成员函数继承自 QwtAbstractSlider
	QwtAbstractSlider (QWidget *parent=nullptr)
	Constructor for QwtAbstractSlider (English only)

	~QwtAbstractSlider () override
	Destructor for QwtAbstractSlider (English only)

void	setValid (bool)
	Set whether the slider is valid (English only)

bool	isValid () const
	Return whether the slider is valid (English only)

double	value () const
	Return the current value (English only)

void	setWrapping (bool)
	Set whether wrapping is enabled (English only)

bool	wrapping () const
	Return whether wrapping is enabled (English only)

void	setTotalSteps (uint)
	Set the total number of steps (English only)

uint	totalSteps () const
	Return the total number of steps (English only)

void	setSingleSteps (uint)
	Set the number of single steps (English only)

uint	singleSteps () const
	Return the number of single steps (English only)

void	setPageSteps (uint)
	Set the number of page steps (English only)

uint	pageSteps () const
	Return the number of page steps (English only)

void	setStepAlignment (bool)
	Set whether step alignment is enabled (English only)

bool	stepAlignment () const
	Return whether step alignment is enabled (English only)

void	setTracking (bool)
	Set whether tracking is enabled (English only)

bool	isTracking () const
	Return whether tracking is enabled (English only)

void	setReadOnly (bool)
	Set whether the slider is read-only (English only)

bool	isReadOnly () const
	Return whether the slider is read-only (English only)

void	setInvertedControls (bool)
	Set whether controls are inverted (English only)

bool	invertedControls () const
	Return whether controls are inverted (English only)

Public 成员函数继承自 QwtAbstractScale
	QwtAbstractScale (QWidget *parent=nullptr)
	Constructor for QwtAbstractScale

void	setScale (double lowerBound, double upperBound)
	Specify a scale by interval bounds

void	setScale (const QwtInterval &)
	Specify a scale by interval

void	setScale (const QwtScaleDiv &)
	Specify a scale by scale division

const QwtScaleDiv &	scaleDiv () const
	Return the scale division

void	setLowerBound (double value)
	Set the lower bound of the scale

double	lowerBound () const
	Return the lower bound of the scale

void	setUpperBound (double value)
	Set the upper bound of the scale

double	upperBound () const
	Return the upper bound of the scale

void	setScaleStepSize (double stepSize)
	Set the step size used for calculating scale division

double	scaleStepSize () const
	Return the step size hint

void	setScaleMaxMajor (int ticks)
	Set the maximum number of major tick intervals

int	scaleMaxMinor () const
	Return the maximum number of minor tick intervals

void	setScaleMaxMinor (int ticks)
	Set the maximum number of minor tick intervals

int	scaleMaxMajor () const
	Return the maximum number of major tick intervals

void	setScaleEngine (QwtScaleEngine *)
	Set the scale engine

const QwtScaleEngine *	scaleEngine () const
	Return the scale engine (const version)

QwtScaleEngine *	scaleEngine ()
	Return the scale engine (non-const version)

int	transform (double) const
	Transform a scale value to widget coordinates

double	invTransform (int) const
	Transform a widget coordinate to scale value

bool	isInverted () const
	Check if scale is inverted

double	minimum () const
	Return the minimum boundary

double	maximum () const
	Return the maximum boundary

const QwtScaleMap &	scaleMap () const
	Return the scale map

Protected 成员函数
virtual void	drawRose (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup) const
	Draw the compass rose

virtual void	drawScaleContents (QPainter *, const QPointF &center, double radius) const override
	Draw the contents of the scale

virtual void	keyPressEvent (QKeyEvent *) override
	Handles key events

Protected 成员函数继承自 QwtDial
virtual void	wheelEvent (QWheelEvent *) override
	Wheel Event handler

virtual void	paintEvent (QPaintEvent *) override
	Paint the dial

virtual void	changeEvent (QEvent *) override
	Change Event handler

virtual void	drawFrame (QPainter *)
	Draw the frame around the dial

virtual void	drawContents (QPainter *) const
	Draw the contents inside the frame

virtual void	drawFocusIndicator (QPainter *) const
	Draw the focus indicator

void	invalidateCache ()
	Invalidate the internal caches used to speed up repainting

virtual void	drawScale (QPainter *, const QPointF &center, double radius) const
	Draw the scale

virtual void	drawNeedle (QPainter *, const QPointF &, double radius, double direction, QPalette::ColorGroup) const
	Draw the needle

virtual double	scrolledTo (const QPoint &) const override
	Determine the value for a new position of the slider handle.

virtual bool	isScrollPosition (const QPoint &) const override
	Determine what to do when the user presses a mouse button.

virtual void	sliderChange () override
	Handle slider changes (English only)

virtual void	scaleChange () override
	Invalidate the internal caches and call QwtAbstractSlider::scaleChange()

Protected 成员函数继承自 QwtAbstractSlider
virtual void	mousePressEvent (QMouseEvent *) override
	Handle mouse press events (English only)

virtual void	mouseReleaseEvent (QMouseEvent *) override
	Handle mouse release events (English only)

virtual void	mouseMoveEvent (QMouseEvent *) override
	Handle mouse move events (English only)

void	incrementValue (int stepCount)
	Increment the value by a number of steps (English only)

double	incrementedValue (double value, int stepCount) const
	Calculate incremented value (English only)

Protected 成员函数继承自 QwtAbstractScale
void	rescale (double lowerBound, double upperBound, double stepSize)
	Recalculate scale and update scale draw (English only)

void	setAbstractScaleDraw (QwtAbstractScaleDraw *)
	Set the scale draw object (English only)

const QwtAbstractScaleDraw *	abstractScaleDraw () const
	Return the scale draw (const version) (English only)

QwtAbstractScaleDraw *	abstractScaleDraw ()
	Return the scale draw (non-const version) (English only)

void	updateScaleDraw ()
	Update the scale draw (English only)

额外继承的成员函数
Public 类型继承自 QwtDial
enum	Shadow { Plain = QFrame::Plain , Raised = QFrame::Raised , Sunken = QFrame::Sunken }
	Frame shadow 更多...

enum	Mode { RotateNeedle , RotateScale }
	Mode controlling whether the needle or the scale is rotating 更多...

Public 槽继承自 QwtAbstractSlider
void	setValue (double value)
	Set the slider value (English only)

信号继承自 QwtAbstractSlider
void	valueChanged (double value)
	Notify a change of value

void	sliderPressed ()
	Signal emitted when the user presses the movable part of the slider

void	sliderReleased ()
	Signal emitted when the user releases the movable part of the slider

void	sliderMoved (double value)
	Signal emitted when the user moves the slider with the mouse

属性继承自 QwtDial
int	lineWidth

Shadow	frameShadow

Mode	mode

double	origin

double	minScaleArc

double	maxScaleArc

属性继承自 QwtAbstractSlider
double	value

uint	totalSteps

uint	singleSteps

uint	pageSteps

bool	stepAlignment

bool	readOnly

bool	tracking

bool	wrapping

bool	invertedControls

属性继承自 QwtAbstractScale
double	lowerBound

double	upperBound

int	scaleMaxMajor

int	scaleMaxMinor

double	scaleStepSize

详细描述

A Compass Widget

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

注解: The examples/dials example shows how to use QwtCompass.

构造及析构函数说明

◆ QwtCompass()

QwtCompass::QwtCompass ( QWidget * parent = nullptr )

explicit

Constructor

参数

[in] parent Parent widget

Creates 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.

Destructor

成员函数说明

◆ drawRose()

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

protectedvirtual

Draw the compass rose

参数

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

◆ drawScaleContents()

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

overrideprotectedvirtual

Draw the contents of the scale

参数

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

重载 QwtDial .

◆ keyPressEvent()

void QwtCompass::keyPressEvent ( QKeyEvent * kev )

overrideprotectedvirtual

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.

参见: isReadOnly()

重载 QwtAbstractSlider .

◆ rose() [1/2]

QwtCompassRose * QwtCompass::rose ( )

Get the compass rose

返回: The compass rose

参见: setRose()

◆ rose() [2/2]

const QwtCompassRose * QwtCompass::rose ( ) const

Get the compass rose

返回: The compass rose (const version)

参见: setRose()

◆ setRose()

void QwtCompass::setRose ( QwtCompassRose * rose )

Set a rose for the compass

参数

[in] rose Compass rose

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

参见: rose()

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_compass.h
/home/runner/work/QWT/QWT/src/plot/qwt_compass.cpp

类

Public 成员函数

Protected 成员函数

额外继承的成员函数

详细描述

构造及析构函数说明

◆ QwtCompass()

成员函数说明

◆ drawRose()

◆ drawScaleContents()

◆ keyPressEvent()

◆ rose() [1/2]

◆ rose() [2/2]

◆ setRose()