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NAME

       QwtCompass -

SYNOPSIS

       Inherits QwtDial.

Detailed Description

       A Compass Widget.

       QwtCompass is a widget to display and enter directions. It consists of
       a scale, an optional needle and rose.

       Note:
           The examples/dials example shows how to use QwtCompass.

       Definition at line 36 of file qwt_compass.h.

   Public Member Functions
       QwtCompass (QWidget *parent=0, const char *name=0)
       virtual ~QwtCompass ()
       void setRose (QwtCompassRose *rose)
       const QwtCompassRose * rose () const
       QwtCompassRose * rose ()
       const QMap< double, QString > & labelMap () const
       QMap< double, QString > & labelMap ()
       void setLabelMap (const QMap< double, QString > &map)

   Protected Member Functions
       virtual QString scaleLabel (double value) const
       virtual void drawRose (QPainter *, const QPoint &center, int radius,
           double north, QPalette::ColorGroup) const
       virtual void drawScaleContents (QPainter *, const QPoint &center, int
           radius) const
       virtual void keyPressEvent (QKeyEvent *)

Constructor & Destructor Documentation

   QwtCompass::QwtCompass (QWidget * parent = 0, const char * name = 0)
       Constructor.

       Parameters:
           parent Parent widget
           name Widget name

       Create a compass widget with a scale, no needle and no rose. The
       default origin is 270.0 with no valid value. It accepts mouse and
       keyboard inputs and has no step size. The default mode is
       QwtDial::RotateNeedle. Definition at line 34 of file qwt_compass.cpp.

       References QwtDial::setOrigin(), QwtDial::setScaleOptions(), and
       QwtDial::setWrapping().

   QwtCompass::~QwtCompass () [virtual]
       Destructor.

       Definition at line 66 of file qwt_compass.cpp.

Member Function Documentation

   void QwtCompass::drawRose (QPainter * painter, const QPoint & center, int
       radius, double north, QPalette::ColorGroup cg) const [protected,
       virtual]
       Draw the compass rose

       Parameters:
           painter Painter
           center Center of the compass
           radius of the circle, where to paint the rose
           north Direction pointing north, in degrees counter clockwise
           cg Color group

       Definition at line 101 of file qwt_compass.cpp.

       Referenced by drawScaleContents().

   void QwtCompass::drawScaleContents (QPainter *, const QPoint & center, int
       radius) const [protected, virtual]
       Draw the contents of the scale.

       Reimplemented from QwtDial.

       Definition at line 72 of file qwt_compass.cpp.

       References drawRose(), QwtSliderBase::isValid(), QwtDial::mode(),
       QwtDial::origin(), and QwtDblRange::value().

   void QwtCompass::keyPressEvent (QKeyEvent * kev) [protected, virtual]
       Handles key events

       Beside the keys described in QwtDial::keyPressEvent numbers from 1-9
       (without 5) set the direction according to their position on the num
       pad.

       See also:
           isReadOnly()

       Reimplemented from QwtDial.

       Definition at line 154 of file qwt_compass.cpp.

       References QwtSliderBase::isReadOnly(), QwtDial::keyPressEvent(),
       QwtDial::mode(), QwtDial::origin(), QwtSliderBase::setValue(), and
       QwtDblRange::value().

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

       See also:
           QwtCompass::setLabelMap

       Definition at line 223 of file qwt_compass.cpp.

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

       See also:
           QwtCompass::setLabelMap

       Definition at line 214 of file qwt_compass.cpp.

   QwtCompassRose * QwtCompass::rose ()
       Returns:
           rose

       See also:
           QwtCompass::setRose

       Definition at line 140 of file qwt_compass.cpp.

   const QwtCompassRose * QwtCompass::rose () const
       Returns:
           rose

       See also:
           QwtCompass::setRose

       Definition at line 131 of file qwt_compass.cpp.

   QString QwtCompass::scaleLabel (double value) const [protected, virtual]
       Map a value to a corresponding label

       Parameters:
           value Value that will be mapped

       Returns:
           Label, or QString::null

       label() looks in a map for a corresponding label for value or return
       QString::null.

       See also:
           QwtCompass::labelMap, QwtCompass::setLabelMap

       Reimplemented from QwtDial.

       Definition at line 255 of file qwt_compass.cpp.

   void QwtCompass::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:
           QwtCompass::labelMap, QwtCompass::scaleDraw, QwtScaleDraw::setScale

       Definition at line 240 of file qwt_compass.cpp.

   void QwtCompass::setRose (QwtCompassRose * rose)
       Set a rose for the compass

       Parameters:
           rose Compass rose

       Warning:
           The rose will be deleted, when a different rose is set or in
           ~QwtCompass

       See also:
           QwtCompass::rose

       Definition at line 115 of file qwt_compass.cpp.

Author

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       code.