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
       Generated automatically by Doxygen for Qwt User's Guide from the source
       code.

Version 6.2.0                   Sun Jul 18 2021         QwtCompassScaleDraw(3)