NAME

       QwtIntervalSymbol - A drawing primitive for displaying an interval like an error bar.

SYNOPSIS

       #include <qwt_interval_symbol.h>

   Public Types
       enum Style { NoSymbol = -1, Bar, Box, UserSymbol = 1000 }
           Symbol style.

   Public Member Functions
       QwtIntervalSymbol (Style=NoSymbol)
       QwtIntervalSymbol (const QwtIntervalSymbol &)
           Copy constructor.
       virtual ~QwtIntervalSymbol ()
           Destructor.
       QwtIntervalSymbol & operator= (const QwtIntervalSymbol &)
           Assignment operator.
       bool operator== (const QwtIntervalSymbol &) const
           Compare two symbols.
       bool operator!= (const QwtIntervalSymbol &) const
           Compare two symbols.
       void setWidth (int)
       int width () const
       void setBrush (const QBrush &)
           Assign a brush.
       const QBrush & brush () const
       void setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
       void setPen (const QPen &)
       const QPen & pen () const
       void setStyle (Style)
       Style style () const
       virtual void draw (QPainter *, Qt::Orientation, const QPointF &from, const QPointF &to)
           const

Detailed Description

       A drawing primitive for displaying an interval like an error bar.

       See also:
           QwtPlotIntervalCurve

Member Enumeration Documentation

   enum QwtIntervalSymbol::Style
       Symbol style.

       Enumerator

       NoSymbol
              No Style. The symbol cannot be drawn.

       Bar    The symbol displays a line with caps at the beginning/end. The size of the caps
              depends on the symbol width().

       Box    The symbol displays a plain rectangle using pen() and brush(). The size of the
              rectangle depends on the translated interval and the width(),

       UserSymbol
              Styles >= UserSymbol are reserved for derived classes of QwtIntervalSymbol that
              overload draw() with additional application specific symbol types.

Constructor & Destructor Documentation

   QwtIntervalSymbol::QwtIntervalSymbol (Style style = NoSymbol)
       Constructor

       Parameters:
           style Style of the symbol

       See also:
           setStyle(), style(), Style

Member Function Documentation

   const QBrush & QwtIntervalSymbol::brush () const
       Returns:
           Brush

       See also:
           setBrush()

   void QwtIntervalSymbol::draw (QPainter * painter, Qt::Orientation orientation, const QPointF &
       from, const QPointF & to) const [virtual]
       Draw a symbol depending on its style

       Parameters:
           painter Painter
           orientation Orientation
           from Start point of the interval in target device coordinates
           to End point of the interval in target device coordinates

       See also:
           setStyle()

   const QPen & QwtIntervalSymbol::pen () const
       Returns:
           Pen

       See also:
           setPen(), brush()

   void QwtIntervalSymbol::setBrush (const QBrush & brush)
       Assign a brush. The brush is used for the Box style.

       Parameters:
           brush Brush

       See also:
           brush()

   void QwtIntervalSymbol::setPen (const QColor & color, qreal width = 0.0, Qt::PenStyle style =
       Qt::SolidLine)
       Build and assign a pen

       In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see
       QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.

       Parameters:
           color Pen color
           width Pen width
           style Pen style

       See also:
           pen(), brush()

   void QwtIntervalSymbol::setPen (const QPen & pen)
       Assign a pen

       Parameters:
           pen Pen

       See also:
           pen(), setBrush()

   void QwtIntervalSymbol::setStyle (Style style)
       Specify the symbol style

       Parameters:
           style Style

       See also:
           style(), Style

   void QwtIntervalSymbol::setWidth (int width)
       Specify the width of the symbol It is used depending on the style.

       Parameters:
           width Width

       See also:
           width(), setStyle()

   QwtIntervalSymbol::Style QwtIntervalSymbol::style () const
       Returns:
           Current symbol style

       See also:
           setStyle()

   int QwtIntervalSymbol::width () const
       Returns:
           Width of the symbol.

       See also:
           setWidth(), setStyle()

Author

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