NAME¶

QwtDialNeedle - Base class for needles that can be used in a QwtDial.

SYNOPSIS¶

#include <qwt_dial_needle.h> Inherited by QwtCompassMagnetNeedle, QwtCompassWindArrow, and QwtDialSimpleNeedle.

Public Member Functions¶

QwtDialNeedle () virtual ~QwtDialNeedle () virtual void setPalette (const QPalette &) const QPalette & palette () const virtual void draw (QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const

Protected Member Functions¶

virtual void drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0 virtual void drawKnob (QPainter *, double width, const QBrush &, bool sunken) const

Detailed Description¶

Base class for needles that can be used in a QwtDial. QwtDialNeedle is a pointer that indicates a value by pointing to a specific direction. Qwt is missing a set of good looking needles. Contributions are very welcome. See also:

Constructor & Destructor Documentation¶

QwtDialNeedle::QwtDialNeedle ()¶

Constructor.

QwtDialNeedle::~QwtDialNeedle () [virtual]¶

Destructor.

Member Function Documentation¶

void QwtDialNeedle::draw (QPainter *painter, const QPointF &center, doublelength, doubledirection, QPalette::ColorGroupcolorGroup = QPalette::Active) const [virtual] Draw the needle¶

Parameters:

void QwtDialNeedle::drawKnob (QPainter *painter, doublewidth, const QBrush &brush, boolsunken) const [protected, virtual]¶

Draw the knob.

virtual void QwtDialNeedle::drawNeedle (QPainter *painter, doublelength, QPalette::ColorGroupcolorGroup) const [protected, pure virtual]¶

Draw the needle. The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ). The painter is already initilaized with translation and rotation. Parameters: See also: Implemented in QwtDialSimpleNeedle, QwtCompassMagnetNeedle, and QwtCompassWindArrow.

const QPalette & QwtDialNeedle::palette () const Returns:¶

void QwtDialNeedle::setPalette (const QPalette &palette) [virtual] Sets the palette for the needle.¶

Parameters:

Author¶

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