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.
       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

   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

Constructor & Destructor Documentation

   QwtCompassScaleDraw::QwtCompassScaleDraw () [explicit]
       Constructor. Initializes a label map for multiples of 45 degrees

   QwtCompassScaleDraw::QwtCompassScaleDraw (const QMap< double, QString > & map) [explicit]
       Constructor.

       Parameters:
           map Value to label map

Member Function Documentation

   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.

   QMap< double, QString > QwtCompassScaleDraw::labelMap () const
       Returns:
           map, mapping values to labels

       See also:
           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()

Author

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