Provided by: libqwt-doc_6.1.4-2_all 
NAME
QwtPlotMarker - A class for drawing markers.
SYNOPSIS
#include <qwt_plot_marker.h>
Inherits QwtPlotItem.
Public Types
enum LineStyle { NoLine, HLine, VLine, Cross }
Public Member Functions
QwtPlotMarker (const QString &title=QString())
Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine.
QwtPlotMarker (const QwtText &title)
Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine.
virtual ~QwtPlotMarker ()
Destructor.
virtual int rtti () const
double xValue () const
Return x Value.
double yValue () const
Return y Value.
QPointF value () const
Return Value.
void setXValue (double)
Set X Value.
void setYValue (double)
Set Y Value.
void setValue (double, double)
Set Value.
void setValue (const QPointF &)
Set Value.
void setLineStyle (LineStyle)
Set the line style.
LineStyle lineStyle () const
void setLinePen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
void setLinePen (const QPen &)
const QPen & linePen () const
void setSymbol (const QwtSymbol *)
Assign a symbol.
const QwtSymbol * symbol () const
void setLabel (const QwtText &)
Set the label.
QwtText label () const
void setLabelAlignment (Qt::Alignment)
Set the alignment of the label.
Qt::Alignment labelAlignment () const
void setLabelOrientation (Qt::Orientation)
Set the orientation of the label.
Qt::Orientation labelOrientation () const
void setSpacing (int)
Set the spacing.
int spacing () const
virtual void draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const
QRectF &) const
virtual QRectF boundingRect () const
virtual QwtGraphic legendIcon (int index, const QSizeF &) const
Protected Member Functions
virtual void drawLines (QPainter *, const QRectF &, const QPointF &) const
virtual void drawLabel (QPainter *, const QRectF &, const QPointF &) 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 setSymbol() member assigns a symbol to the marker. The symbol is drawn at the
specified point.
With setLabel(), a label can be assigned to the marker. The 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
Qt::AlignLeft | Qt::AlignTop.
Note:
QwtPlotTextLabel is intended to align a text label according to the geometry of canvas
( unrelated to plot coordinates )
Member Enumeration Documentation
enum QwtPlotMarker::LineStyle
Line styles.
See also:
setLineStyle(), lineStyle()
Enumerator
NoLine No line.
HLine A horizontal line.
VLine A vertical line.
Cross A crosshair.
Member Function Documentation
QRectF QwtPlotMarker::boundingRect () const [virtual]
Returns:
An invalid bounding rect: QRectF(1.0, 1.0, -2.0, -2.0)
Note:
A width or height < 0.0 is ignored by the autoscaler
Reimplemented from QwtPlotItem.
void QwtPlotMarker::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap &
yMap, const QRectF & canvasRect) const [virtual]
Draw the marker
Parameters:
painter Painter
xMap x Scale Map
yMap y Scale Map
canvasRect Contents rectangle of the canvas in painter coordinates
Implements QwtPlotItem.
void QwtPlotMarker::drawLabel (QPainter * painter, const QRectF & canvasRect, const QPointF &
pos) const [protected], [virtual]
Align and draw the text label of the marker
Parameters:
painter Painter
canvasRect Contents rectangle of the canvas in painter coordinates
pos Position of the marker, translated into widget coordinates
See also:
drawLabel(), QwtSymbol::drawSymbol()
void QwtPlotMarker::drawLines (QPainter * painter, const QRectF & canvasRect, const QPointF &
pos) const [protected], [virtual]
Draw the lines marker
Parameters:
painter Painter
canvasRect Contents rectangle of the canvas in painter coordinates
pos Position of the marker, translated into widget coordinates
See also:
drawLabel(), QwtSymbol::drawSymbol()
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()
QwtGraphic QwtPlotMarker::legendIcon (int index, const QSizeF & size) const [virtual]
Returns:
Icon representing the marker on the legend
Parameters:
index Index of the legend entry ( usually there is only one )
size Icon size
See also:
setLegendIconSize(), legendData()
Reimplemented from QwtPlotItem.
const QPen & QwtPlotMarker::linePen () const
Returns:
the line pen
See also:
setLinePen()
QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle () const
Returns:
the line style
See also:
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::Alignment align)
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.
See also:
labelAlignment(), labelOrientation()
void QwtPlotMarker::setLabelOrientation (Qt::Orientation orientation)
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 QColor & color, qreal width = 0.0, Qt::PenStyle style =
Qt::SolidLine)
Build and assign a line 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 QwtPlotMarker::setLinePen (const QPen & pen)
Specify a pen for the line.
Parameters:
pen New pen
See also:
linePen()
void QwtPlotMarker::setLineStyle (LineStyle style)
Set the line style.
Parameters:
style Line style.
See also:
lineStyle()
void QwtPlotMarker::setSpacing (int spacing)
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 * symbol)
Assign a symbol.
Parameters:
symbol 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
Generated automatically by Doxygen for Qwt User's Guide from the source code.