QwtCompassWindArrow − An indicator for the wind direction.
#include <qwt_dial_needle.h>
Inherits QwtDialNeedle.
enum
Style { Style1, Style2 }
Style of the arrow.
QwtCompassWindArrow (Style, const QColor &light=Qt::white, const QColor &dark=Qt::gray)
Public Member Functions inherited from QwtDialNeedle
QwtDialNeedle ()
Constructor.
virtual ˜QwtDialNeedle ()
Destructor.
virtual void setPalette (const QPalette &)
const QPalette & palette () const
virtual void draw (QPainter *, const QPointF
¢er, double length, double direction,
QPalette::ColorGroup=QPalette::Active) const
virtual void drawNeedle (QPainter *, double length, QPalette::ColorGroup) const override
Protected Member Functions inherited from QwtDialNeedle
virtual void drawKnob
(QPainter *, double width, const QBrush &, bool sunken)
const
Draw the knob.
An indicator for the wind direction.
QwtCompassWindArrow shows the direction where the wind comes from.
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QPalette::Light |
Used for Style1, or the light half of Style2
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QPalette::Dark |
Used for the dark half of Style2
See also
QwtDial, QwtCompass
Definition at line 164 of file qwt_dial_needle.h.
Style of the arrow.
Enumerator
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Style1 |
A needle pointing to the center. |
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Style2 |
A needle pointing to the center. |
Definition at line 168 of file qwt_dial_needle.h.
Constructor
Parameters
style Arrow style
light Light color
dark Dark color
Definition at line 409 of file qwt_dial_needle.cpp.
Draw the needle
Parameters
painter Painter
length Length of the needle
colorGroup Color group, used for painting
Implements QwtDialNeedle.
Definition at line 427 of file qwt_dial_needle.cpp.
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