QwtCompassScaleDraw(3)

Qwt User's Guide

QwtCompassScaleDraw(3)

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

Additional Inherited Members

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.

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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Sun Jul 18 2021

Version 6.2.0