QwtCompassScaleDraw Class Reference

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

#include <qwt_compass.h>

Inheritance diagram for QwtCompassScaleDraw:

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 override
Public Member Functions inherited from QwtRoundScaleDraw
	QwtRoundScaleDraw ()
	Constructor.
virtual	~QwtRoundScaleDraw ()
	Destructor.
void	setRadius (double radius)
double	radius () const
void	moveCenter (double x, double y)
	Move the center of the scale draw, leaving the radius unchanged.
void	moveCenter (const QPointF &)
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 override
Public Member Functions inherited from QwtAbstractScaleDraw
	QwtAbstractScaleDraw ()
	Constructor.
virtual	~QwtAbstractScaleDraw ()
	Destructor.
void	setScaleDiv (const QwtScaleDiv &)
const QwtScaleDiv &	scaleDiv () const
void	setTransformation (QwtTransform *)
const QwtScaleMap &	scaleMap () const
QwtScaleMap &	scaleMap ()
void	enableComponent (ScaleComponent, bool enable=true)
bool	hasComponent (ScaleComponent) const
void	setTickLength (QwtScaleDiv::TickType, double length)
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
virtual void	draw (QPainter *, const QPalette &) const
	Draw the scale.
void	setMinimumExtent (double)
	Set a minimum for the extent.
double	minimumExtent () const
void	invalidateCache ()

Additional Inherited Members
Public Types inherited from QwtAbstractScaleDraw
enum	ScaleComponent { Backbone = 0x01 , Ticks = 0x02 , Labels = 0x04 }
typedef QFlags< ScaleComponent >	ScaleComponents
Protected Member Functions inherited from QwtRoundScaleDraw
virtual void	drawTick (QPainter *, double value, double len) const override
virtual void	drawBackbone (QPainter *) const override
virtual void	drawLabel (QPainter *, double value) const override
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

Definition at line 32 of file qwt_compass.h.

Constructor & Destructor Documentation

QwtCompassScaleDraw() [1/2]

QwtCompassScaleDraw::QwtCompassScaleDraw ( )

explicit

Constructor.

Initializes a label map for multiples of 45 degrees

Definition at line 28 of file qwt_compass.cpp.

QwtCompassScaleDraw() [2/2]

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

explicit

Constructor.

Parameters

map	Value to label map

Definition at line 63 of file qwt_compass.cpp.

~QwtCompassScaleDraw()

QwtCompassScaleDraw::~QwtCompassScaleDraw ( )

virtual

Destructor.

Definition at line 73 of file qwt_compass.cpp.

Member Function Documentation

label()

QwtText QwtCompassScaleDraw::label ( double value ) const

overridevirtual

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.

Definition at line 116 of file qwt_compass.cpp.

labelMap()

QMap< double, QString > QwtCompassScaleDraw::labelMap

(

)

const

Returns

map, mapping values to labels

See also

setLabelMap()

Definition at line 99 of file qwt_compass.cpp.

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()

Definition at line 90 of file qwt_compass.cpp.