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QwtWheel Class Reference

The Wheel Widget. More...

#include <qwt_wheel.h>

Inheritance diagram for QwtWheel::

List of all members.

Public Methods
	QwtWheel (QWidget *parent=0, const char *name=0)
virtual	~QwtWheel ()
void	setTotalAngle (double angle)
void	setTickCnt (int cnt)
void	setOrientation (Qt::Orientation o)
void	setViewAngle (double angle)
void	setInternalBorder (int width)
void	setMass (double val)
void	setWheelWidth (int w)
virtual QSize	sizeHint () const
virtual QSize	minimumSizeHint () const
virtual QSizePolicy	sizePolicy () const
Protected Methods
virtual void	resizeEvent (QResizeEvent *e)
virtual void	paintEvent (QPaintEvent *e)
void	layoutWheel (bool update=TRUE)
void	draw (QPainter *p, const QRect &update_rect)
void	drawWheel (QPainter *p, const QRect &r)
void	drawWheelBackground (QPainter *p, const QRect &r)
void	setColorArray ()
virtual void	valueChange ()
virtual void	paletteChange (const QPalette &)
virtual double	getValue (const QPoint &p)
virtual void	getScrollMode (const QPoint &p, int &scrollMode, int &direction)

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Detailed Description

The Wheel Widget.

The wheel widget can be used to change values over a very large range in very small steps. Using the setMass member, it can be configured as a flywheel.

See also:

The radio example.

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Constructor & Destructor Documentation

QwtWheel::QwtWheel (  QWidget *    parent = 0, const char *    name = 0 )

Constructor.

QwtWheel::~QwtWheel (    )  [virtual]

Destructor.

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Member Function Documentation

void QwtWheel::draw (  QPainter *    p, const QRect &    update_rect )  [protected]

Redraw panel and wheel.

void QwtWheel::drawWheel (  QPainter *    p, const QRect &    r )  [protected]

Redraw the wheel. Parameters: p  painter r  contents rectangle

void QwtWheel::drawWheelBackground (  QPainter *    p, const QRect &    r )  [protected]

Draw the Wheel's background gradient.

void QwtWheel::getScrollMode (  const QPoint &    p, int &    scrollMode, int &    direction )  [protected, virtual]

Determine the scrolling mode and direction corresponding to a specified point. Parameters: p  point scrollMode  scrolling mode direction  direction Reimplemented from QwtSliderBase.

double QwtWheel::getValue (  const QPoint &    p )  [protected, virtual]

Determine the value corresponding to a specified point. Reimplemented from QwtSliderBase.

void QwtWheel::layoutWheel (  bool    update_geometry = TRUE )  [protected]

Recalculate the slider's geometry and layout based on.

QSize QwtWheel::minimumSizeHint (    )  const [virtual]

Return a minimum size hint. Warning: The return value is based on the wheel width.

void QwtWheel::paintEvent (  QPaintEvent *    e )  [protected, virtual]

Qt Paint Event.

void QwtWheel::paletteChange (  const QPalette &    )  [protected, virtual]

Call update() when the palette changes.

void QwtWheel::resizeEvent (  QResizeEvent *    e )  [protected, virtual]

Qt Resize Event.

void QwtWheel::setColorArray (    )  [protected]

Set up the color array for the background pixmap.

void QwtWheel::setInternalBorder (  int    w )

Set the internal border width of the wheel. The internal border must not be smaller than 1 and is limited in dependence on the wheel's size. Values outside the allowed range will be clipped. The internal border defaults to 2. Parameters: w  border width

void QwtWheel::setMass (  double    val )  [virtual]

Set the mass of the wheel. Assigning a mass turns the wheel into a flywheel. Parameters: val  the wheel's mass Reimplemented from QwtSliderBase.

void QwtWheel::setOrientation (  Qt::Orientation    o )

Set the wheel's orientation. Parameters: o  Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal.

void QwtWheel::setTickCnt (  int    cnt )

Adjust the number of grooves in the wheel's surface. The number of grooves is limited to 6 <= cnt <= 50. Values outside this range will be clipped. The default value is 10. Parameters: cnt  Number of grooves per 360 degrees

void QwtWheel::setTotalAngle (  double    angle )

Set the total angle which the wheel can be turned. One full turn of the wheel corresponds to an angle of 360 degrees. A total angle of n*360 degrees means that the wheel has to be turned n times around its axis to get from the minimum value to the maximum value. The default setting of the total angle is 360 degrees. Parameters: angle  total angle in degrees

void QwtWheel::setViewAngle (  double    angle )

Specify the visible portion of the wheel. You may use this function for fine-tuning the appearance of the wheel. The default value is 175 degrees. The value is limited from 10 to 175 degrees. Parameters: angle  Visible angle in degrees

void QwtWheel::setWheelWidth (  int    w )

Set the width of the wheel. Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation. Parameters: w  the wheel's width

QSize QwtWheel::sizeHint (    )  const [virtual]

Returns: a size hint

QSizePolicy QwtWheel::sizePolicy (    )  const [virtual]

Returns: Preferred/Fixed for horizontal, Fixed/Preferred for vertical scales.

void QwtWheel::valueChange (    )  [protected, virtual]

Notify value change. Reimplemented from QwtSliderBase.

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