An indicator for the wind direction.
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#include <qwt_dial_needle.h>
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| | QwtCompassWindArrow (Style, const QColor &light=Qt::white, const QColor &dark=Qt::gray) |
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| QwtDialNeedle () |
| | Constructor.
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virtual | ~QwtDialNeedle () |
| | Destructor.
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| virtual void | setPalette (const QPalette &) |
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| const QPalette & | palette () const |
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| virtual void | draw (QPainter *painter, const QPointF ¢er, double length, double direction, QPalette::ColorGroup=QPalette::Active) const |
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| virtual void | drawNeedle (QPainter *, double length, QPalette::ColorGroup) const |
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virtual void | drawKnob (QPainter *, double width, const QBrush &, bool sunken) const |
| | Draw the knob.
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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
◆ Style
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.
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◆ QwtCompassWindArrow()
| QwtCompassWindArrow::QwtCompassWindArrow |
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Style |
style, |
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const QColor & |
light = Qt::white, |
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const QColor & |
dark = Qt::gray |
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) |
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Constructor
- Parameters
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| style | Arrow style |
| light | Light color |
| dark | Dark color |
◆ drawNeedle()
| void QwtCompassWindArrow::drawNeedle |
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QPainter * |
painter, |
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double |
length, |
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QPalette::ColorGroup |
colorGroup |
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) |
| const |
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protectedvirtual |
Draw the needle
- Parameters
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| painter | Painter |
| length | Length of the needle |
| colorGroup | Color group, used for painting |
Implements QwtDialNeedle.