Public Types¶

enum Shadow { Plain = QFrame::Plain, Raised = QFrame::Raised, Sunken = QFrame::Sunken }
Frame shadow. enum Mode { RotateNeedle, RotateScale }
Mode controlling whether the needle or the scale is rotating.

Public Member Functions¶

QwtDial (QWidget *parent=NULL)
Constructor. virtual ~QwtDial ()
Destructor. void setFrameShadow (Shadow)
Shadow frameShadow () const
void setLineWidth (int)
int lineWidth () const
void setMode (Mode)
Change the mode of the dial. Mode mode () const
void setScaleArc (double minArc, double maxArc)
void setMinScaleArc (double)
double minScaleArc () const
void setMaxScaleArc (double)
double maxScaleArc () const
virtual void setOrigin (double)
Change the origin. double origin () const
void setNeedle (QwtDialNeedle *)
const QwtDialNeedle * needle () const
QwtDialNeedle * needle ()
QRect boundingRect () const
QRect innerRect () const
virtual QRect scaleInnerRect () const
virtual QSize sizeHint () const
virtual QSize minimumSizeHint () const
void setScaleDraw (QwtRoundScaleDraw *)
QwtRoundScaleDraw * scaleDraw ()
const QwtRoundScaleDraw * scaleDraw () const

Protected Member Functions¶

virtual void wheelEvent (QWheelEvent *)
virtual void paintEvent (QPaintEvent *)
virtual void changeEvent (QEvent *)
virtual void drawFrame (QPainter *)
virtual void drawContents (QPainter *) const
Draw the contents inside the frame. virtual void drawFocusIndicator (QPainter *) const
void invalidateCache ()
virtual void drawScale (QPainter *, const QPointF &center, double radius) const
virtual void drawScaleContents (QPainter *painter, const QPointF &center, double radius) const
virtual void drawNeedle (QPainter *, const QPointF &, double radius, double direction, QPalette::ColorGroup) const
virtual double scrolledTo (const QPoint &) const
Determine the value for a new position of the slider handle. virtual bool isScrollPosition (const QPoint &) const
Determine what to do when the user presses a mouse button. virtual void sliderChange ()
Calling update() virtual void scaleChange ()

Additional Inherited Members¶

enum QwtDial::Mode¶

Mode controlling whether the needle or the scale is rotating.

Enumerator

RotateNeedle

The needle is rotating.

RotateScale

The needle is fixed, the scales are rotating.

enum QwtDial::Shadow¶

Frame shadow. Unfortunately it is not possible to use QFrame::Shadow as a property of a widget that is not derived from QFrame. The following enum is made for the designer only. It is safe to use QFrame::Shadow instead.

Enumerator

Plain

QFrame::Plain.

Raised

QFrame::Raised.

Sunken

QFrame::Sunken.

QwtDial::QwtDial (QWidget * parent = NULL) [explicit]¶

Constructor.

Parameters:

Create a dial widget with no needle. The scale is initialized to [ 0.0, 360.0 ] and 360 steps ( QwtAbstractSlider::setTotalSteps() ). The origin of the scale is at 90°,

The value is set to 0.0.

The default mode is QwtDial::RotateNeedle.

QRect QwtDial::boundingRect () const¶

Returns:

See also:

void QwtDial::changeEvent (QEvent * event) [protected], [virtual]¶

Change Event handler

Parameters:

Invalidates internal paint caches if necessary

void QwtDial::drawContents (QPainter * painter) const [protected], [virtual]¶

Draw the contents inside the frame. QPalette::Window is the background color outside of the frame. QPalette::Base is the background color inside the frame. QPalette::WindowText is the background color inside the scale.

Parameters:

See also:

void QwtDial::drawFocusIndicator (QPainter * painter) const [protected], [virtual]¶

Draw the focus indicator

Parameters:

void QwtDial::drawFrame (QPainter * painter) [protected], [virtual]¶

Draw the frame around the dial

Parameters:

See also:

void QwtDial::drawNeedle (QPainter * painter, const QPointF & center, double radius, double direction, QPalette::ColorGroup colorGroup) const [protected], [virtual]¶

Draw the needle

Parameters:

Reimplemented in QwtAnalogClock.

void QwtDial::drawScale (QPainter * painter, const QPointF & center, double radius) const [protected], [virtual]¶

Draw the scale

Parameters:

void QwtDial::drawScaleContents (QPainter * painter, const QPointF & center, double radius) const [protected], [virtual]¶

Draw the contents inside the scale

Paints nothing.

Parameters:

Reimplemented in QwtCompass.

QwtDial::Shadow QwtDial::frameShadow () const¶

Returns:

QRect QwtDial::innerRect () const¶

Returns:

See also:

void QwtDial::invalidateCache () [protected]¶

Invalidate the internal caches used to speed up repainting

bool QwtDial::isScrollPosition (const QPoint & pos) const [protected], [virtual]¶

Determine what to do when the user presses a mouse button.

Parameters:

Return values:

See also:

Implements QwtAbstractSlider.

int QwtDial::lineWidth () const¶

Returns:

See also:

double QwtDial::maxScaleArc () const¶

Returns:

See also:

QSize QwtDial::minimumSizeHint () const [virtual]¶

Returns:

See also:

double QwtDial::minScaleArc () const¶

Returns:

See also:

QwtDial::Mode QwtDial::mode () const¶

Returns:

See also:

const QwtDialNeedle * QwtDial::needle () const¶

Returns:

See also:

QwtDialNeedle * QwtDial::needle ()¶

Returns:

See also:

double QwtDial::origin () const¶

The origin is the angle where scale and needle is relative to.

Returns:

See also:

void QwtDial::paintEvent (QPaintEvent * event) [protected], [virtual]¶

Paint the dial

Parameters:

void QwtDial::scaleChange () [protected], [virtual]¶

Invalidate the internal caches and call QwtAbstractSlider::scaleChange()

Reimplemented from QwtAbstractSlider.

QwtRoundScaleDraw * QwtDial::scaleDraw ()¶

Returns:

const QwtRoundScaleDraw * QwtDial::scaleDraw () const¶

Returns:

QRect QwtDial::scaleInnerRect () const [virtual]¶

Returns:

See also:

double QwtDial::scrolledTo (const QPoint & pos) const [protected], [virtual]¶

Determine the value for a new position of the slider handle.

Parameters:

Returns:

See also:

Implements QwtAbstractSlider.

void QwtDial::setFrameShadow (Shadow shadow)¶

Sets the frame shadow value from the frame style.

Parameters:

See also:

void QwtDial::setLineWidth (int lineWidth)¶

Sets the line width of the frame

Parameters:

See also:

void QwtDial::setMaxScaleArc (double max)¶

Set the upper limit for the scale arc

Parameters:

See also:

void QwtDial::setMinScaleArc (double min)¶

Set the lower limit for the scale arc

Parameters:

See also:

void QwtDial::setMode (Mode mode)¶

Change the mode of the dial.

Parameters:

In case of QwtDial::RotateNeedle the needle is rotating, in case of QwtDial::RotateScale, the needle points to origin() and the scale is rotating.

The default mode is QwtDial::RotateNeedle.

See also:

void QwtDial::setNeedle (QwtDialNeedle * needle)¶

Set a needle for the dial

Parameters:

Warning:

void QwtDial::setOrigin (double origin) [virtual]¶

Change the origin. The origin is the angle where scale and needle is relative to.

Parameters:

See also:

void QwtDial::setScaleArc (double minArc, double maxArc)¶

Change the arc of the scale

Parameters:

See also:

void QwtDial::setScaleDraw (QwtRoundScaleDraw * scaleDraw)¶

Set an individual scale draw

The motivation for setting a scale draw is often to overload QwtRoundScaleDraw::label() to return individual tick labels.

Parameters:

Warning:

QSize QwtDial::sizeHint () const [virtual]¶

Returns:

See also:

void QwtDial::wheelEvent (QWheelEvent * event) [protected], [virtual]¶

Wheel Event handler

Parameters:

Reimplemented from QwtAbstractSlider.