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QwtCompassWindArrow(3) Qwt User's Guide QwtCompassWindArrow(3)


QwtCompassWindArrow - An indicator for the wind direction.


#include <qwt_dial_needle.h>

Inherits QwtDialNeedle.

Public Types

enum Style { Style1, Style2 }
Style of the arrow.

Public Member Functions

QwtCompassWindArrow (Style, const QColor &light=Qt::white, const QColor &dark=Qt::gray)

Protected Member Functions

virtual void drawNeedle (QPainter *, double length, QPalette::ColorGroup) const override

Detailed Description

An indicator for the wind direction.

QwtCompassWindArrow shows the direction where the wind comes from.

  • QPalette::Light
    Used for Style1, or the light half of Style2
  • QPalette::Dark
    Used for the dark half of Style2

See also

QwtDial, QwtCompass

Definition at line 164 of file qwt_dial_needle.h.

Member Enumeration Documentation

enum QwtCompassWindArrow::Style

Style of the arrow.


A needle pointing to the center.
A needle pointing to the center.

Definition at line 168 of file qwt_dial_needle.h.

Constructor & Destructor Documentation

QwtCompassWindArrow::QwtCompassWindArrow (Style style, const QColor & light = Qt::white, const QColor & dark = Qt::gray)



style Arrow style
light Light color
dark Dark color

Definition at line 409 of file qwt_dial_needle.cpp.

Member Function Documentation

void QwtCompassWindArrow::drawNeedle (QPainter * painter, double length, QPalette::ColorGroup colorGroup) const [override], [protected], [virtual]

Draw the needle


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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Sun Jul 18 2021 Version 6.2.0