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QwtGrid Class Reference

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

#include <qwt_grid.h>

Inherited by QwtPlotGrid.

Inheritance diagram for QwtGrid

[legend]List of all members.

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

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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 setYDiv() The draw() member draws the grid within a bounding rectangle.

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Constructor & Destructor Documentation

QwtGrid::QwtGrid ( )

ctor.

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 )

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 enableXMin()

void QwtGrid::enableXMin ( bool tf )

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

void QwtGrid::enableYMin ( bool tf )

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

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 )

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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The documentation for this class was generated from the following files:

• qwt_grid.h
• qwt_grid.cpp

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