A Compass Widget. More...

#include <qwt_compass.h>

Inheritance diagram for QwtCompass:

Public Member Functions
	QwtCompass (QWidget *parent=NULL)
	Constructor.

virtual	~QwtCompass ()
	Destructor.

void	setRose (QwtCompassRose *rose)

const QwtCompassRose *	rose () const

QwtCompassRose *	rose ()

Public Member Functions inherited from QwtDial
	QwtDial (QWidget *parent=NULL)
	Constructor.

virtual	~QwtDial ()
	Destructor.

void	setFrameShadow (Shadow)

Shadow	frameShadow () const

void	setLineWidth (int)

int	lineWidth () const

void	setMode (Mode)
	Change the mode of the dial.

Mode	mode () const

void	setScaleArc (double minArc, double maxArc)

void	setMinScaleArc (double)

double	minScaleArc () const

void	setMaxScaleArc (double)

double	maxScaleArc () const

virtual void	setOrigin (double)
	Change the origin.

double	origin () const

void	setNeedle (QwtDialNeedle *)

const QwtDialNeedle *	needle () const

QwtDialNeedle *	needle ()

QRect	boundingRect () const

QRect	innerRect () const

virtual QRect	scaleInnerRect () const

virtual QSize	sizeHint () const override

virtual QSize	minimumSizeHint () const override

void	setScaleDraw (QwtRoundScaleDraw *)

QwtRoundScaleDraw *	scaleDraw ()

const QwtRoundScaleDraw *	scaleDraw () const

Public Member Functions inherited from QwtAbstractSlider
	QwtAbstractSlider (QWidget *parent=NULL)
	Constructor.

virtual	~QwtAbstractSlider ()
	Destructor.

void	setValid (bool)

bool	isValid () const

double	value () const
	Returns the current value.

void	setWrapping (bool)

bool	wrapping () const

void	setTotalSteps (uint)
	Set the number of steps.

uint	totalSteps () const

void	setSingleSteps (uint)
	Set the number of steps for a single increment.

uint	singleSteps () const

void	setPageSteps (uint)
	Set the number of steps for a page increment.

uint	pageSteps () const

void	setStepAlignment (bool)
	Enable step alignment.

bool	stepAlignment () const

void	setTracking (bool)
	Enables or disables tracking.

bool	isTracking () const

void	setReadOnly (bool)

bool	isReadOnly () const

void	setInvertedControls (bool)

bool	invertedControls () const

Public Member Functions inherited from QwtAbstractScale
	QwtAbstractScale (QWidget *parent=NULL)

virtual	~QwtAbstractScale ()
	Destructor.

void	setScale (double lowerBound, double upperBound)
	Specify a scale.

void	setScale (const QwtInterval &)
	Specify a scale.

void	setScale (const QwtScaleDiv &)
	Specify a scale.

const QwtScaleDiv &	scaleDiv () const

void	setLowerBound (double value)

double	lowerBound () const

void	setUpperBound (double value)

double	upperBound () const

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

double	scaleStepSize () const

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

int	scaleMaxMinor () const

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

int	scaleMaxMajor () const

void	setScaleEngine (QwtScaleEngine *)
	Set a scale engine.

const QwtScaleEngine *	scaleEngine () const

QwtScaleEngine *	scaleEngine ()

int	transform (double) const

double	invTransform (int) const

bool	isInverted () const

double	minimum () const

double	maximum () const

const QwtScaleMap &	scaleMap () const

Protected Member Functions
virtual void	drawRose (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup) const

virtual void	drawScaleContents (QPainter *, const QPointF &center, double radius) const override

virtual void	keyPressEvent (QKeyEvent *) override

Protected Member Functions inherited from QwtDial
virtual void	wheelEvent (QWheelEvent *) override

virtual void	paintEvent (QPaintEvent *) override

virtual void	changeEvent (QEvent *) override

virtual void	drawFrame (QPainter *)

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

virtual void	drawFocusIndicator (QPainter *) const

void	invalidateCache ()

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

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

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
	Calling update()

virtual void	scaleChange () override

Protected Member Functions inherited from QwtAbstractSlider
virtual void	mousePressEvent (QMouseEvent *) override

virtual void	mouseReleaseEvent (QMouseEvent *) override

virtual void	mouseMoveEvent (QMouseEvent *) override

void	incrementValue (int stepCount)

double	incrementedValue (double value, int stepCount) const

Protected Member Functions inherited from QwtAbstractScale
void	rescale (double lowerBound, double upperBound, double stepSize)

void	setAbstractScaleDraw (QwtAbstractScaleDraw *)
	Set a scale draw.

const QwtAbstractScaleDraw *	abstractScaleDraw () const

QwtAbstractScaleDraw *	abstractScaleDraw ()

void	updateScaleDraw ()

Additional Inherited Members
Public Types inherited from QwtDial
enum	Shadow { Plain = QFrame::Plain , Raised = QFrame::Raised , Sunken = QFrame::Sunken }
	Frame shadow. More...

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

Public Slots inherited from QwtAbstractSlider
void	setValue (double value)

Signals inherited from QwtAbstractSlider
void	valueChanged (double value)
	Notify a change of value.

void	sliderPressed ()

void	sliderReleased ()

void	sliderMoved (double value)

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.

Definition at line 61 of file qwt_compass.h.

Constructor & Destructor Documentation

◆ QwtCompass()

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.

Definition at line 158 of file qwt_compass.cpp.

◆ ~QwtCompass()

QwtCompass::~QwtCompass ( )

virtual

Destructor.

Definition at line 176 of file qwt_compass.cpp.

Member Function Documentation

◆ drawRose()

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

protectedvirtual

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

Definition at line 218 of file qwt_compass.cpp.

◆ drawScaleContents()

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

overrideprotectedvirtual

Draw the contents of the scale

Parameters

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

Reimplemented from QwtDial.

Definition at line 189 of file qwt_compass.cpp.

◆ 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.

See also: isReadOnly()

Reimplemented from QwtAbstractSlider.

Definition at line 271 of file qwt_compass.cpp.

◆ rose() [1/2]

QwtCompassRose * QwtCompass::rose ( )

Returns: rose

See also: setRose()

Definition at line 257 of file qwt_compass.cpp.

◆ rose() [2/2]

const QwtCompassRose * QwtCompass::rose ( ) const

Returns: rose

See also: setRose()

Definition at line 248 of file qwt_compass.cpp.

◆ setRose()

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()

Definition at line 232 of file qwt_compass.cpp.

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtCompass()

◆ ~QwtCompass()

Member Function Documentation

◆ drawRose()

◆ drawScaleContents()

◆ keyPressEvent()

◆ rose() [1/2]

◆ rose() [2/2]

◆ setRose()