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QwtGrid Class Reference

A class which draws a coordinate grid. More...

#include <qwt_grid.h>

Inheritance diagram for QwtGrid::

List of all members.

Public Methods
	QwtGrid ()
virtual	~QwtGrid ()
virtual const QwtGrid &	operator= (const QwtGrid &g)
virtual void	draw (QPainter *p, const QRect &r, const QwtDiMap &mx, const QwtDiMap &my)
void	enableX (bool tf)
bool	xEnabled () const
void	enableY (bool tf)
bool	yEnabled () const
void	enableXMin (bool tf)
bool	xMinEnabled () const
void	enableYMin (bool tf)
bool	yMinEnabled () const
void	setXDiv (const QwtScaleDiv &sx)
const QwtScaleDiv &	xScaleDiv () const
void	setYDiv (const QwtScaleDiv &sy)
const QwtScaleDiv &	yScaleDiv () const
void	setPen (const QPen &p)
void	setMajPen (const QPen &p)
const QPen &	majPen () const
void	setMinPen (const QPen &p)
const QPen &	minPen () const
Protected Methods
virtual void	gridChanged ()

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Detailed Description

A class which draws a coordinate grid.

The QwtGrid class can be used to draw a coordinate grid. A coordinate grid consists of major and minor vertical and horizontal gridlines. The locations of the gridlines are determined by the X and Y scale divisions which can be assigned with QwtGrid::setXDiv and QwtGrid::setYDiv() The draw() member draws the grid within a bounding rectangle.

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Constructor & Destructor Documentation

QwtGrid::QwtGrid (    )

Enables major grid, disables minor grid.

QwtGrid::~QwtGrid (    )  [virtual]

dtor.

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Member Function Documentation

void QwtGrid::draw (  QPainter *    p, const QRect &    r, const QwtDiMap &    mx, const QwtDiMap &    my )  [virtual]

Draw the grid. The grid is drawn into the bounding rectangle such that gridlines begin and end at the rectangle's borders. The X and Y maps are used to map the scale divisions into the drawing region screen. Parameters: p  Painter r  Bounding rectangle mx  X axis map my  Y axis

void QwtGrid::enableX (  bool    tf )

Enable or disable vertical gridlines. Parameters: tf  Enable (TRUE) or disable See also: Minor gridlines can be enabled or disabled with QwtGrid::enableXMin()

void QwtGrid::enableXMin (  bool    tf )

Enable or disable minor vertical gridlines. Parameters: tf  Enable (TRUE) or disable See also: QwtGrid::enableX()

void QwtGrid::enableY (  bool    tf )

Enable or disable horizontal gridlines. Parameters: tf  Enable (TRUE) or disable See also: Minor gridlines can be enabled or disabled with QwtGrid::enableYMin()

void QwtGrid::enableYMin (  bool    tf )

Enable or disable minor horizontal gridlines. Parameters: tf  Enable (TRUE) or disable See also: QwtGrid::enableY()

void QwtGrid::gridChanged (    )  [protected, virtual]

Notify a change of attributes. This virtual function is called when an attribute of the grid has changed. It can be redefined by derived classes. The default implementation does nothing. Reimplemented in QwtPlotGrid.

const QPen & QwtGrid::majPen (    )  const

Returns: the pen for the major gridlines See also: QwtGrid::setMinPen, QwtGrid::setPen

const QPen & QwtGrid::minPen (    )  const

Returns: the pen for the minor gridlines See also: QwtGrid::setMinPen, QwtGrid::setPen

const QwtGrid & QwtGrid::operator= (  const QwtGrid &    g )  [virtual]

Assignment operator. Parameters: g  Grid to be assigned

void QwtGrid::setMajPen (  const QPen &    p )

Assign a pen for the major gridlines. Parameters: p  Pen

void QwtGrid::setMinPen (  const QPen &    p )

Assign a pen for the minor gridlines. Parameters: p  Pen

void QwtGrid::setPen (  const QPen &    p )

Assign a pen for both major and minor gridlines. Parameters: p  Pen

void QwtGrid::setXDiv (  const QwtScaleDiv &    sx )

Assign an x axis scale division. Parameters: sx  Scale division Warning: QwtGrid uses implicit sharing (see Qt Manual) for the scale divisions. See also: QwtScaleDiv

void QwtGrid::setYDiv (  const QwtScaleDiv &    sy )

Assign a y axis division. Parameters: sy  Scale division Warning: QwtGrid uses implicit sharing (see Qt Manual) for the scale divisions. See also: QwtScaleDiv

bool QwtGrid::xEnabled (    )  const

Returns: TRUE if vertical gridlines are enabled See also: QwtGrid::enableX

bool QwtGrid::xMinEnabled (    )  const

Returns: TRUE if minor vertical gridlines are enabled See also: QwtGrid::enableXMin

const QwtScaleDiv & QwtGrid::xScaleDiv (    )  const

Returns: the scale division of the x axis

bool QwtGrid::yEnabled (    )  const

Returns: TRUE if horizontal gridlines are enabled See also: QwtGrid::enableY

bool QwtGrid::yMinEnabled (    )  const

Returns: TRUE if minor horizontal gridlines are enabled See also: QwtGrid::enableYMin

const QwtScaleDiv & QwtGrid::yScaleDiv (    )  const

Returns: the scale division of the y axis

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