QwtPlotMarker(3) Qwt User's Guide QwtPlotMarker(3)NAMEQwtPlotMarker-
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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Version 5.2.3 Tue Nov 20 2012 QwtPlotMarker(3)
