QwtCompassScaleDraw - A special scale draw made for QwtCompass.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtCompassScaleDraw::QwtCompassScaleDraw () [explicit]  QwtCompassScaleDraw::QwtCompassScaleDraw (const QMap< double, QString > &map) [explicit]  QwtCompassScaleDraw::˜QwtCompassScaleDraw () [virtual]  Member Function Documentation  QwtText QwtCompassScaleDraw::label (double value) const [override],[virtual]  QMap< double, QString > QwtCompassScaleDraw::labelMap () const  void QwtCompassScaleDraw::setLabelMap (const QMap< double, QString > & map)  Author 

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NAME

QwtCompassScaleDraw − A special scale draw made for QwtCompass.

SYNOPSIS

#include <qwt_compass.h>

Inherits QwtRoundScaleDraw.

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::QwtCompassScaleDraw () [explicit]

Constructor. Initializes a label map for multiples of 45 degrees

Definition at line 28 of file qwt_compass.cpp.

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 () [virtual]

Destructor.

Definition at line 73 of file qwt_compass.cpp.

Member Function Documentation

QwtText QwtCompassScaleDraw::label (double value) const [override],[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.

Definition at line 116 of file qwt_compass.cpp.

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

Returns

map, mapping values to labels

See also

setLabelMap()

Definition at line 99 of file qwt_compass.cpp.

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.

Author

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