NAME

       QwtPlotMarker -

SYNOPSIS

       #include <qwt_plot_marker.h>

       Inherits QwtPlotItem.

   Public Types
       enum LineStyle { NoLine, HLine, VLine, Cross }

   Public Member Functions
       QwtPlotMarker ()
       virtual ~QwtPlotMarker ()
       virtual QwtDoubleRect boundingRect () const
       virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const
           QRect &) const
       QwtText label () const
       Qt::Alignment labelAlignment () const
       Qt::Orientation labelOrientation () const
       const QPen & linePen () const
       LineStyle lineStyle () const
       virtual int rtti () const
       void setLabel (const QwtText &)
       void setLabelAlignment (Qt::Alignment)
       void setLabelOrientation (Qt::Orientation)
       void setLinePen (const QPen &p)
       void setLineStyle (LineStyle st)
       void setSpacing (int)
       void setSymbol (const QwtSymbol &s)
       void setValue (double, double)
       void setValue (const QwtDoublePoint &)
       void setXValue (double)
       void setYValue (double)
       int spacing () const
       const QwtSymbol & symbol () const
       QwtDoublePoint value () const
       double xValue () const
       double yValue () const

   Protected Member Functions
       void drawAt (QPainter *, const QRect &, const QPoint &) const

Detailed Description

       A class for drawing markers.

       A marker can be a horizontal line, a vertical line, a symbol, a label or any combination
       of them, which can be drawn around a center point inside a bounding rectangle.

       The QwtPlotMarker::setSymbol() member assigns a symbol to the marker. The symbol is drawn
       at the specified point.

       With QwtPlotMarker::setLabel(), a label can be assigned to the marker. The
       QwtPlotMarker::setLabelAlignment() member specifies where the label is drawn. All the
       Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The
       interpretation of the alignment depends on the marker's line style. The alignment refers
       to the center point of the marker, which means, for example, that the label would be
       printed left above the center point if the alignment was set to AlignLeft|AlignTop.

Member Enumeration Documentation

   enum QwtPlotMarker::LineStyle
       Line styles.

       See also:
           setLineStyle(), lineStyle()

Member Function Documentation

   QwtDoubleRect QwtPlotMarker::boundingRect () const [virtual]
       Returns:
           An invalid bounding rect: QwtDoubleRect(1.0, 1.0, -2.0, -2.0)

       Reimplemented from QwtPlotItem.

   void QwtPlotMarker::draw (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap,
       const QRect &canvasRect) const [virtual]
       Draw the marker

       Parameters:
           painter Painter
           xMap x Scale Map
           yMap y Scale Map
           canvasRect Contents rect of the canvas in painter coordinates

       Implements QwtPlotItem.

   void QwtPlotMarker::drawAt (QPainter *painter, const QRect &canvasRect, const QPoint &pos)
       const [protected]
       Draw the marker at a specific position

       Parameters:
           painter Painter
           canvasRect Contents rect of the canvas in painter coordinates
           pos Position of the marker in painter coordinates

   QwtText QwtPlotMarker::label () const
       Returns:
           the label

       See also:
           setLabel()

   Qt::Alignment QwtPlotMarker::labelAlignment () const
       Returns:
           the label alignment

       See also:
           setLabelAlignment(), setLabelOrientation()

   Qt::Orientation QwtPlotMarker::labelOrientation () const
       Returns:
           the label orientation

       See also:
           setLabelOrientation(), labelAlignment()

   const QPen & QwtPlotMarker::linePen () const
       Returns:
           the line pen

       See also:
           setLinePen()

   QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle () const
       Returns:
           the line style

       See also:
           For a description of line styles, see QwtPlotMarker::setLineStyle()

   int QwtPlotMarker::rtti () const [virtual]
       Returns:
           QwtPlotItem::Rtti_PlotMarker

       Reimplemented from QwtPlotItem.

   void QwtPlotMarker::setLabel (const QwtText &label)
       Set the label. Parameters:
           label label text

       See also:
           label()

   void QwtPlotMarker::setLabelAlignment (Qt::Alignmentalign)
       Set the alignment of the label. In case of QwtPlotMarker::HLine the alignment is relative
       to the y position of the marker, but the horizontal flags correspond to the canvas
       rectangle. In case of QwtPlotMarker::VLine the alignment is relative to the x position of
       the marker, but the vertical flags correspond to the canvas rectangle.

       In all other styles the alignment is relative to the marker's position.

       Parameters:
           align Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight,
           AlignCenter, AlgnHCenter, AlignVCenter.

       See also:
           labelAlignment(), labelOrientation()

   void QwtPlotMarker::setLabelOrientation (Qt::Orientationorientation)
       Set the orientation of the label. When orientation is Qt::Vertical the label is rotated by
       90.0 degrees ( from bottom to top ).

       Parameters:
           orientation Orientation of the label

       See also:
           labelOrientation(), setLabelAlignment()

   void QwtPlotMarker::setLinePen (const QPen &pen)
       Specify a pen for the line.

       The width of non cosmetic pens is scaled according to the resolution of the paint device.

       Parameters:
           pen New pen

       See also:
           linePen(), QwtPainter::scaledPen()

   void QwtPlotMarker::setLineStyle (QwtPlotMarker::LineStylest)
       Set the line style. Parameters:
           st Line style. Can be one of QwtPlotMarker::NoLine, HLine, VLine or Cross

       See also:
           lineStyle()

   void QwtPlotMarker::setSpacing (intspacing)
       Set the spacing. When the label is not centered on the marker position, the spacing is the
       distance between the position and the label.

       Parameters:
           spacing Spacing

       See also:
           spacing(), setLabelAlignment()

   void QwtPlotMarker::setSymbol (const QwtSymbol &s)
       Assign a symbol. Parameters:
           s New symbol

       See also:
           symbol()

   int QwtPlotMarker::spacing () const
       Returns:
           the spacing

       See also:
           setSpacing()

   const QwtSymbol & QwtPlotMarker::symbol () const
       Returns:
           the symbol

       See also:
           setSymbol(), QwtSymbol

Author

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