An abstract base class for drawing scales. More...

#include <qwt_abstract_scale_draw.h>

Inheritance diagram for QwtAbstractScaleDraw:

Classes
class	PrivateData

Public Types
enum	ScaleComponent { Backbone = 0x01 , Ticks = 0x02 , Labels = 0x04 }
	Components of a scale. More...

Public Member Functions
	QwtAbstractScaleDraw ()
	Constructor for QwtAbstractScaleDraw.

virtual	~QwtAbstractScaleDraw ()
	Destructor for QwtAbstractScaleDraw .

void	setScaleDiv (const QwtScaleDiv &)
	Set the scale division.

const QwtScaleDiv &	scaleDiv () const
	Return the scale division.

void	setTransformation (QwtTransform *)
	Set the scale transformation.

const QwtScaleMap &	scaleMap () const
	Return the scale map (const version)

QwtScaleMap &	scaleMap ()
	Return the scale map (non-const version)

void	enableComponent (ScaleComponent, bool enable=true)
	Enable or disable a scale component.

bool	hasComponent (ScaleComponent) const
	Check if a component is enabled.

void	setTickLength (QwtScaleDiv::TickType, double length)
	Set the length of the ticks.

double	tickLength (QwtScaleDiv::TickType) const
	Get the length of the ticks.

double	maxTickLength () const
	Get the length of the longest tick.

void	setSpacing (double)
	Set the spacing between tick and labels.

double	spacing () const
	Get the spacing.

void	setPenWidthF (qreal width)
	Specify the width of the scale pen.

qreal	penWidthF () const
	Get the scale pen width.

void	setSelected (bool on)
	Set whether the scale draw is selected.

bool	isSelected () const
	Check if the scale draw is selected.

void	setSelectedPenWidthOffset (qreal offset=1)
	Set the pen width offset for the axis when it is in selected state.

qreal	selectedPenWidthOffset () const
	Get the current pen width offset for the axis when it is in selected state.

virtual void	draw (QPainter *, const QPalette &) const
	Draw the scale.

virtual QwtText	label (double) const
	Convert a value into its representing label.

virtual double	extent (const QFont &font) const =0

void	setMinimumExtent (double)
	Set a minimum for the extent.

double	minimumExtent () const
	Get the minimum extent.

void	invalidateCache ()
	Invalidate the cache used by tickLabel()

Protected Member Functions
virtual void	drawTick (QPainter *painter, double value, double len) const =0
	Draw a tick.

virtual void	drawBackbone (QPainter *painter) const =0
	Draws the baseline of the scale.

virtual void	drawLabel (QPainter *painter, double value) const =0
	Draws the label for a major scale tick.

const QwtText &	tickLabel (const QFont &, double value) const
	Convert a value into its representing label and cache it.

Detailed Description

An abstract base class for drawing scales.

Member Enumeration Documentation

◆ ScaleComponent

enum QwtAbstractScaleDraw::ScaleComponent

Components of a scale.

Enumerator
Backbone	Backbone = the line where the ticks are located
Ticks	Ticks
Labels	Labels

Constructor & Destructor Documentation

◆ QwtAbstractScaleDraw()

QwtAbstractScaleDraw::QwtAbstractScaleDraw ( )

Constructor for QwtAbstractScaleDraw.

◆ ~QwtAbstractScaleDraw()

QwtAbstractScaleDraw::~QwtAbstractScaleDraw ( )

virtual

Destructor for QwtAbstractScaleDraw .

Member Function Documentation

◆ draw()

void QwtAbstractScaleDraw::draw	(	QPainter *	painter,
		const QPalette &	palette
	)		const

virtual

Draw the scale.

◆ drawBackbone()

virtual void QwtAbstractScaleDraw::drawBackbone ( QPainter * painter ) const

protectedpure virtual

Draws the baseline of the scale.

Implemented in QwtRoundScaleDraw, and QwtScaleDraw.

◆ drawLabel()

virtual void QwtAbstractScaleDraw::drawLabel	(	QPainter *	painter,
		double	value
	)		const

protectedpure virtual

Draws the label for a major scale tick.

Implemented in QwtRoundScaleDraw, and QwtScaleDraw.

◆ drawTick()

virtual void QwtAbstractScaleDraw::drawTick	(	QPainter *	painter,
		double	value,
		double	len
	)		const

protectedpure virtual

Draw a tick.

Implemented in QwtRoundScaleDraw, and QwtScaleDraw.

◆ enableComponent()

void QwtAbstractScaleDraw::enableComponent	(	ScaleComponent	component,
		bool	enable = `true`
	)

Enable or disable a scale component.

◆ extent()

virtual double QwtAbstractScaleDraw::extent ( const QFont & font ) const

pure virtual

Implemented in QwtRoundScaleDraw, and QwtScaleDraw.

◆ hasComponent()

bool QwtAbstractScaleDraw::hasComponent ( ScaleComponent component ) const

Check if a component is enabled.

◆ invalidateCache()

void QwtAbstractScaleDraw::invalidateCache ( )

Invalidate the cache used by tickLabel()

◆ isSelected()

bool QwtAbstractScaleDraw::isSelected ( ) const

Check if the scale draw is selected.

◆ label()

QwtText QwtAbstractScaleDraw::label ( double value ) const

virtual

Convert a value into its representing label.

Reimplemented in QwtCompassScaleDraw, and QwtDateScaleDraw.

◆ maxTickLength()

double QwtAbstractScaleDraw::maxTickLength ( ) const

Get the length of the longest tick.

◆ minimumExtent()

double QwtAbstractScaleDraw::minimumExtent ( ) const

Get the minimum extent.

◆ penWidthF()

qreal QwtAbstractScaleDraw::penWidthF ( ) const

Get the scale pen width.

◆ scaleDiv()

const QwtScaleDiv & QwtAbstractScaleDraw::scaleDiv ( ) const

Return the scale division.

◆ scaleMap() [1/2]

QwtScaleMap & QwtAbstractScaleDraw::scaleMap ( )

Return the scale map (non-const version)

◆ scaleMap() [2/2]

const QwtScaleMap & QwtAbstractScaleDraw::scaleMap ( ) const

Return the scale map (const version)

◆ selectedPenWidthOffset()

qreal QwtAbstractScaleDraw::selectedPenWidthOffset ( ) const

Get the current pen width offset for the axis when it is in selected state.

◆ setMinimumExtent()

void QwtAbstractScaleDraw::setMinimumExtent ( double minExtent )

Set a minimum for the extent.

◆ setPenWidthF()

void QwtAbstractScaleDraw::setPenWidthF ( qreal width )

Specify the width of the scale pen.

◆ setScaleDiv()

void QwtAbstractScaleDraw::setScaleDiv ( const QwtScaleDiv & scaleDiv )

Set the scale division.

◆ setSelected()

void QwtAbstractScaleDraw::setSelected ( bool on )

Set whether the scale draw is selected.

◆ setSelectedPenWidthOffset()

void QwtAbstractScaleDraw::setSelectedPenWidthOffset ( qreal offset = 1 )

Set the pen width offset for the axis when it is in selected state.

◆ setSpacing()

void QwtAbstractScaleDraw::setSpacing ( double spacing )

Set the spacing between tick and labels.

◆ setTickLength()

void QwtAbstractScaleDraw::setTickLength	(	QwtScaleDiv::TickType	tickType,
		double	length
	)

Set the length of the ticks.

◆ setTransformation()

void QwtAbstractScaleDraw::setTransformation ( QwtTransform * transformation )

Set the scale transformation.

◆ spacing()

double QwtAbstractScaleDraw::spacing ( ) const

Get the spacing.

◆ tickLabel()

const QwtText & QwtAbstractScaleDraw::tickLabel	(	const QFont &	font,
		double	value
	)		const

protected

Convert a value into its representing label and cache it.

◆ tickLength()

double QwtAbstractScaleDraw::tickLength ( QwtScaleDiv::TickType tickType ) const

Get the length of the ticks.

The documentation for this class was generated from the following files:

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

Classes

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ ScaleComponent

Constructor & Destructor Documentation

◆ QwtAbstractScaleDraw()

◆ ~QwtAbstractScaleDraw()

Member Function Documentation

◆ draw()

◆ drawBackbone()

◆ drawLabel()

◆ drawTick()

◆ enableComponent()

◆ extent()

◆ hasComponent()

◆ invalidateCache()

◆ isSelected()

◆ label()

◆ maxTickLength()

◆ minimumExtent()

◆ penWidthF()

◆ scaleDiv()

◆ scaleMap() [1/2]

◆ scaleMap() [2/2]

◆ selectedPenWidthOffset()

◆ setMinimumExtent()

◆ setPenWidthF()

◆ setScaleDiv()

◆ setSelected()

◆ setSelectedPenWidthOffset()

◆ setSpacing()

◆ setTickLength()

◆ setTransformation()

◆ spacing()

◆ tickLabel()

◆ tickLength()