QwtCompassScaleDraw man page
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, or QString::null
- 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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