A special scale draw made for QwtCompass. More...

#include <qwt_compass.h>

Inheritance diagram for QwtCompassScaleDraw:

Classes
class	PrivateData

Public Member Functions
	QwtCompassScaleDraw ()
	Constructor.

	QwtCompassScaleDraw (const QMap< double, QString > &map)
	Constructor.

virtual	~QwtCompassScaleDraw ()
	Destructor.

void	setLabelMap (const QMap< double, QString > &map)
	Set a map, mapping values to labels.

QMap< double, QString >	labelMap () const

virtual QwtText	label (double value) const QWT_OVERRIDE
	Map a value to a corresponding label.

Public Member Functions inherited from QwtRoundScaleDraw
	QwtRoundScaleDraw ()
	Constructor.

virtual	~QwtRoundScaleDraw ()
	Destructor.

void	setRadius (double radius)
	Change of radius the scale.

double	radius () const
	Get the radius.

void	moveCenter (double x, double y)
	Move the center of the scale draw, leaving the radius unchanged.

void	moveCenter (const QPointF &)
	Move the center of the scale draw, leaving the radius unchanged.

QPointF	center () const
	Get the center of the scale.

void	setAngleRange (double angle1, double angle2)
	Adjust the baseline circle segment for round scales.

virtual double	extent (const QFont &) const QWT_OVERRIDE
	Calculate the extent of the scale.

Public Member Functions inherited from QwtAbstractScaleDraw
	QwtAbstractScaleDraw ()
	Constructor.

virtual	~QwtAbstractScaleDraw ()
	Destructor.

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

const QwtScaleDiv &	scaleDiv () const

void	setTransformation (QwtTransform *)
	Change the transformation of the scale.

const QwtScaleMap &	scaleMap () const

QwtScaleMap &	scaleMap ()

void	enableComponent (ScaleComponent, bool enable=true)
	En/Disable a component of the scale.

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

double	maxTickLength () const

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

void	setSelected (bool on)
	设置是否选中

bool	isSelected () const
	是否选中

void	setSelectedPenWidthOffset (qreal offset=1)
	设置坐标轴在选中状态下的画笔宽度附加值

qreal	selectedPenWidthOffset () const
	获取当前坐标轴在选中状态下的画笔宽度附加值

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

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

double	minimumExtent () const
	Get the minimum extent.

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

Additional Inherited Members
Public Types inherited from QwtAbstractScaleDraw
enum	ScaleComponent { Backbone = 0x01 , Ticks = 0x02 , Labels = 0x04 }
	Components of a scale. More...

Protected Member Functions inherited from QwtRoundScaleDraw
virtual void	drawTick (QPainter *, double value, double len) const QWT_OVERRIDE
	Draw a tick.

virtual void	drawBackbone (QPainter *) const QWT_OVERRIDE
	Draws the baseline of the scale.

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

Protected Member Functions inherited from QwtAbstractScaleDraw
const QwtText &	tickLabel (const QFont &, double value) const
	Convert a value into its representing label and cache it.

Detailed Description

A special scale draw made for QwtCompass.

QwtCompassScaleDraw maps values to strings using a special map, that can be modified by the application

The default map consists of the labels N, NE, E, SE, S, SW, W, NW.

See also: QwtCompass

Constructor & Destructor Documentation

◆ QwtCompassScaleDraw() [1/2]

QwtCompassScaleDraw::QwtCompassScaleDraw ( )

explicit

Constructor.

Initializes a label map for multiples of 45 degrees

◆ QwtCompassScaleDraw() [2/2]

QwtCompassScaleDraw::QwtCompassScaleDraw ( const QMap< double, QString > & map )

explicit

Constructor.

Parameters

map	Value to label map

Member Function Documentation

◆ label()

QwtText QwtCompassScaleDraw::label ( double value ) const

virtual

Map a value to a corresponding label.

Parameters

value Value that will be mapped

label() looks in the labelMap() for a corresponding label for value or returns an null text.

Returns: Label

See also: labelMap(), setLabelMap()

Reimplemented from QwtAbstractScaleDraw.

◆ labelMap()

QMap< double, QString > QwtCompassScaleDraw::labelMap ( ) const

Returns: map, mapping values to labels

See also: setLabelMap()

◆ setLabelMap()

void QwtCompassScaleDraw::setLabelMap ( const QMap< double, QString > & map )

Set a map, mapping values to labels.

Parameters

map	Value to label map

The values of the major ticks are found by looking into this map. The default map consists of the labels N, NE, E, SE, S, SW, W, NW.

Warning: The map will have no effect for values that are no major tick values. Major ticks can be changed by QwtScaleDraw::setScale

See also: labelMap(), scaleDraw(), setScale()

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

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

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtCompassScaleDraw() [1/2]

◆ QwtCompassScaleDraw() [2/2]

Member Function Documentation

◆ label()

◆ labelMap()

◆ setLabelMap()