Main Page   Class Hierarchy   Alphabetical List   Compound List   File List   Compound Members   File Members   Related Pages  

QwtMarker Class Reference

A class for drawing markers. More...

#include <qwt_marker.h>

Inherited by QwtPlotMarker.

Inheritance diagram for QwtMarker

Inheritance graph
[legend]
List of all members.

Public Types

enum  LineStyle { NoLine, HLine, VLine, Cross }

Public Methods

 QwtMarker ()
virtual ~QwtMarker ()
const QwtMarker& operator= (const QwtMarker&)
void setLineStyle (LineStyle st)
void setSymbol (const QwtSymbol &s)
void setLabel (const char *txt)
void setLabelAlignment (int align)
void setLabelPen (const QPen &p)
void setLinePen (const QPen &p)
void setFont (const QFont &f)
void draw (QPainter *p, int x, int y, const QRect &r)
LineStyle lineStyle () const
const QwtSymbolsymbol () const
const QPen& labelPen () const
const QPen& linePen () const
const QFont& font () const
int labelAlignment () const
const QString& label () const

Protected Methods

virtual void markerChanged ()

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 setAlignment member specifies where the label is drawn. All the Align*-constants in qwindefs.h (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.


Constructor & Destructor Documentation

QwtMarker::QwtMarker ( )
 

Ctor.

QwtMarker::~QwtMarker ( ) [virtual]
 

Destructor.


Member Function Documentation

void QwtMarker::draw ( QPainter * p,
int x,
int y,
const QRect & r )
 

Draw the marker.

Parameters:
p   Painter
x   X position
y   Y position
r   Bounding rectangle

const QFont & QwtMarker::font ( ) const
 

Returns:
the font used for the label
See also:
QwtMarker::setFont

const QString & QwtMarker::label ( ) const
 

Returns:
the label
See also:
QwtMarker::setLabel

int QwtMarker::labelAlignment ( ) const
 

Returns:
the label alignment
See also:
QwtMarker::setLabelAlignment

const QPen & QwtMarker::labelPen ( ) const
 

Returns:
the label's pen
See also:
QwtMarker::setLabelPen

const QPen & QwtMarker::linePen ( ) const
 

Returns:
the line pen
See also:
QwtMarker::setLinePen

LineStyle QwtMarker::lineStyle ( ) const
 

Returns:
the line style
See also:
For a description of line styles, see QwtMarker::setLineStyle

void QwtMarker::markerChanged ( ) [protected, virtual]
 

Notify a change of parameters.

This virtual function is called when a marker property has been changed and redrawing is advisable. It can be reimplemented by derived classes. The default implementation does nothing.

See also:
void QwtMarker::markerChanged()

const QwtMarker & QwtMarker::operator= ( const QwtMarker & m )
 

Assignment operator.

Parameters:
m   Marker

void QwtMarker::setFont ( const QFont & f )
 

Specify the font for the label.

Parameters:
f   New font

void QwtMarker::setLabel ( const char * txt )
 

Set the label.

Parameters:
txt   label text

void QwtMarker::setLabelAlignment ( int align )
 

Set the alignment of the label.

The alignment determines where the label is drawn relative to the marker's position.

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

void QwtMarker::setLabelPen ( const QPen & p )
 

Specify a pen for the label.

Parameters:
p   New pen

void QwtMarker::setLinePen ( const QPen & p )
 

Specify a pen for the line.

Parameters:
p   New pen

void QwtMarker::setLineStyle ( QwtMarker::LineStyle st )
 

Set the line style.

Parameters:
st   Line style. Can be one of QwtMarker::NoLine, QwtMarker::HLine, QwtMarker::VLine or QwtMarker::Cross

void QwtMarker::setSymbol ( const QwtSymbol & s )
 

Assign a symbol.

Parameters:
s   New symbol
See also:
QwtSymbol

const QwtSymbol & QwtMarker::symbol ( ) const
 

Returns:
the symbol
See also:
QwtMarker::setSymbol, QwtSymbol


The documentation for this class was generated from the following files:
Generated at Thu Dec 14 00:27:17 2000 for Qwt User's Guide by doxygen1.2.3 written by Dimitri van Heesch, © 1997-2000