QwtDial - QwtDial class provides a rounded range control.

       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.1.4                                    Wed Jan 2 2019                                       QwtDial(3)

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

       Parameters:parent Parent widget

       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.

QwtDial class provides a rounded range control.

       QwtDial is intended as base class for dial widgets like speedometers, compass widgets, clocks ...

       A dial contains a scale and a needle indicating the current value of the dial. Depending on Mode one of
       them is fixed and the other is rotating. If not isReadOnly() the dial can be rotated by dragging the
       mouse or using keyboard inputs (see QwtAbstractSlider::keyPressEvent()). A dial might be wrapping, what
       means a rotation below/above one limit continues on the other limit (f.e compass). The scale might cover
       any arc of the dial, its values are related to the origin() of the dial.

       Often dials have to be updated very often according to values from external devices. For these high
       refresh rates QwtDial caches as much as possible. For derived classes it might be necessary to clear
       these caches manually according to attribute changes using invalidateCache().

       Seealso:QwtCompass, QwtAnalogClock, QwtDialNeedleNote:
           The controls and dials examples shows different types of dials.

           QDial is more similar to QwtKnob than to QwtDial

enumQwtDial::Mode
       Mode controlling whether the needle or the scale is rotating.

       EnumeratorRotateNeedle
              The needle is rotating.

       RotateScale
              The needle is fixed, the scales are rotating.

   enumQwtDial::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.

       EnumeratorPlain  QFrame::Plain.

       Raised QFrame::Raised.

       Sunken QFrame::Sunken.

QRectQwtDial::boundingRect()constReturns:
           bounding rectangle of the dial including the frame

       Seealso:setLineWidth(), scaleInnerRect(), innerRect()voidQwtDial::changeEvent(QEvent*event)[protected],[virtual]
       Change Event handler

       Parameters:event Change event

       Invalidates internal paint caches if necessary

   voidQwtDial::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:painter Painter

       Seealso:boundingRect(), innerRect(), scaleInnerRect(), QWidget::setPalette()

   voidQwtDial::drawFocusIndicator(QPainter*painter)const[protected],[virtual]
       Draw the focus indicator

       Parameters:painter Painter

   voidQwtDial::drawFrame(QPainter*painter)[protected],[virtual]
       Draw the frame around the dial

       Parameters:painter Painter

       Seealso:lineWidth(), frameShadow()voidQwtDial::drawNeedle(QPainter*painter,constQPointF&center,doubleradius,doubledirection,QPalette::ColorGroupcolorGroup)const[protected],[virtual]
       Draw the needle

       Parameters:painter Painter
           center Center of the dial
           radius Length for the needle
           direction Direction of the needle in degrees, counter clockwise
           colorGroup ColorGroup

       Reimplemented in QwtAnalogClock.

   voidQwtDial::drawScale(QPainter*painter,constQPointF&center,doubleradius)const[protected],[virtual]
       Draw the scale

       Parameters:painter Painter
           center Center of the dial
           radius Radius of the scale

   voidQwtDial::drawScaleContents(QPainter*painter,constQPointF&center,doubleradius)const[protected],[virtual]
       Draw the contents inside the scale

       Paints nothing.

       Parameters:painter Painter
           center Center of the contents circle
           radius Radius of the contents circle

       Reimplemented in QwtCompass.

   QwtDial::ShadowQwtDial::frameShadow()constReturns:
           Frame shadow /sa setFrameShadow(), lineWidth(), QFrame::frameShadow()

   QRectQwtDial::innerRect()constReturns:
           bounding rectangle of the circle inside the frame

       Seealso:setLineWidth(), scaleInnerRect(), boundingRect()voidQwtDial::invalidateCache()[protected]
       Invalidate the internal caches used to speed up repainting

   boolQwtDial::isScrollPosition(constQPoint&pos)const[protected],[virtual]
       Determine what to do when the user presses a mouse button.

       Parameters:pos Mouse position

       Returnvalues:True,when the inner circle contains pos

       Seealso:scrolledTo()

       Implements QwtAbstractSlider.

   intQwtDial::lineWidth()constReturns:
           Line width of the frame

       Seealso:setLineWidth(), frameShadow(), lineWidth()doubleQwtDial::maxScaleArc()constReturns:
           Upper limit of the scale arc

       Seealso:setScaleArc()QSizeQwtDial::minimumSizeHint()const[virtual]Returns:
           Minimum size hint

       Seealso:sizeHint()doubleQwtDial::minScaleArc()constReturns:
           Lower limit of the scale arc

       Seealso:setScaleArc()QwtDial::ModeQwtDial::mode()constReturns:
           Mode of the dial.

       Seealso:setMode(), origin(), setScaleArc(), value()constQwtDialNeedle*QwtDial::needle()constReturns:
           needle

       Seealso:setNeedle()QwtDialNeedle*QwtDial::needle()Returns:
           needle

       Seealso:setNeedle()doubleQwtDial::origin()const
       The origin is the angle where scale and needle is relative to.

       Returns:
           Origin of the dial

       Seealso:setOrigin()voidQwtDial::paintEvent(QPaintEvent*event)[protected],[virtual]
       Paint the dial

       Parameters:event Paint event

   voidQwtDial::scaleChange()[protected],[virtual]
       Invalidate the internal caches and call QwtAbstractSlider::scaleChange()

       Reimplemented from QwtAbstractSlider.

   QwtRoundScaleDraw*QwtDial::scaleDraw()Returns:
           the scale draw

   constQwtRoundScaleDraw*QwtDial::scaleDraw()constReturns:
           the scale draw

   QRectQwtDial::scaleInnerRect()const[virtual]Returns:
           rectangle inside the scale

       Seealso:setLineWidth(), boundingRect(), innerRect()doubleQwtDial::scrolledTo(constQPoint&pos)const[protected],[virtual]
       Determine the value for a new position of the slider handle.

       Parameters:pos Mouse position

       Returns:
           Value for the mouse position

       Seealso:isScrollPosition()

       Implements QwtAbstractSlider.

   voidQwtDial::setFrameShadow(Shadowshadow)
       Sets the frame shadow value from the frame style.

       Parameters:shadow Frame shadow

       Seealso:setLineWidth(), QFrame::setFrameShadow()

   voidQwtDial::setLineWidth(intlineWidth)
       Sets the line width of the frame

       Parameters:lineWidth Line width

       Seealso:setFrameShadow()voidQwtDial::setMaxScaleArc(doublemax)
       Set the upper limit for the scale arc

       Parameters:max Upper limit of the scale arc

       Seealso:setScaleArc(), setMinScaleArc()voidQwtDial::setMinScaleArc(doublemin)
       Set the lower limit for the scale arc

       Parameters:min Lower limit of the scale arc

       Seealso:setScaleArc(), setMaxScaleArc()voidQwtDial::setMode(Modemode)
       Change the mode of the dial.

       Parameters:mode New mode

       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.

       Seealso:mode(), setValue(), setOrigin()voidQwtDial::setNeedle(QwtDialNeedle*needle)
       Set a needle for the dial

       Parameters:needle Needle

       Warning:
           The needle will be deleted, when a different needle is set or in ~QwtDial()voidQwtDial::setOrigin(doubleorigin)[virtual]
       Change the origin. The origin is the angle where scale and needle is relative to.

       Parameters:origin New origin

       Seealso:origin()voidQwtDial::setScaleArc(doubleminArc,doublemaxArc)
       Change the arc of the scale

       Parameters:minArc Lower limit
           maxArc Upper limit

       Seealso:minScaleArc(), maxScaleArc()voidQwtDial::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:scaleDraw Scale draw

       Warning:
           The previous scale draw is deleted

   QSizeQwtDial::sizeHint()const[virtual]Returns:
           Size hint

       Seealso:minimumSizeHint()voidQwtDial::wheelEvent(QWheelEvent*event)[protected],[virtual]
       Wheel Event handler

       Parameters:event Wheel event

       Reimplemented from QwtAbstractSlider.

       QwtDial - QwtDial class provides a rounded range control.

       #include <qwt_dial.h>

       Inherits QwtAbstractSlider.

       Inherited by QwtAnalogClock, and QwtCompass.

   PublicTypes
       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.

   PublicMemberFunctionsQwtDial (QWidget *parent=NULL)
           Constructor.
       virtual ~QwtDial ()
           Destructor.
       void setFrameShadow (Shadow)
       ShadowframeShadow () const
       void setLineWidth (int)
       int lineWidth () const
       void setMode (Mode)
           Change the mode of the dial.
       Modemode () 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

   ProtectedMemberFunctions
       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 ()

   AdditionalInheritedMembers