QwtPlotGrid (3)

#include <qwt_plot_grid.h>

Inherits QwtPlotItem.

Public Member Functions

QwtPlotGrid ()

virtual ~QwtPlotGrid ()

virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &rect) const

void enableX (bool tf)

void enableXMin (bool tf)

void enableY (bool tf)

void enableYMin (bool tf)

const QPen & majPen () const

const QPen & minPen () const

virtual int rtti () const

void setMajPen (const QPen &p)

void setMinPen (const QPen &p)

void setPen (const QPen &p)

void setXDiv (const QwtScaleDiv &sx)

void setYDiv (const QwtScaleDiv &sy)

virtual void updateScaleDiv (const QwtScaleDiv &xMap, const QwtScaleDiv &yMap)

bool xEnabled () const

bool xMinEnabled () const

const QwtScaleDiv & xScaleDiv () const

bool yEnabled () const

bool yMinEnabled () const

const QwtScaleDiv & yScaleDiv () const

Additional Inherited Members

A class which draws a coordinate grid.

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

void QwtPlotGrid::draw (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRect &canvasRect) const\fC [virtual]\fP

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:

painter Painter

xMap X axis map

yMap Y axis

canvasRect Contents rect of the plot canvas

Implements QwtPlotItem.

void QwtPlotGrid::enableX (booltf)

Enable or disable vertical gridlines. Parameters:

tf Enable (true) or disable

See also:

Minor gridlines can be enabled or disabled with enableXMin()

void QwtPlotGrid::enableXMin (booltf)

Enable or disable minor vertical gridlines. Parameters:

tf Enable (true) or disable

See also:

enableX()

void QwtPlotGrid::enableY (booltf)

Enable or disable horizontal gridlines. Parameters:

tf Enable (true) or disable

See also:

Minor gridlines can be enabled or disabled with enableYMin()

void QwtPlotGrid::enableYMin (booltf)

Enable or disable minor horizontal gridlines. Parameters:

tf Enable (true) or disable

See also:

enableY()

const QPen & QwtPlotGrid::majPen () const

Returns:

the pen for the major gridlines

See also:

setMajPen(), setMinPen(), setPen()

const QPen & QwtPlotGrid::minPen () const

Returns:

the pen for the minor gridlines

See also:

setMinPen(), setMajPen(), setPen()

int QwtPlotGrid::rtti () const\fC [virtual]\fP

Returns:

QwtPlotItem::Rtti_PlotGrid

Reimplemented from QwtPlotItem.

void QwtPlotGrid::setMajPen (const QPen &pen)

Assign a pen for the major gridlines

The width of non cosmetic pens is scaled according to the resolution of the paint device.

Parameters:

pen Pen

See also:

majPen(), setMinPen(), setPen(), QwtPainter::scaledPen()

void QwtPlotGrid::setMinPen (const QPen &pen)

Assign a pen for the minor gridlines

The width of non cosmetic pens is scaled according to the resolution of the paint device.

Parameters:

pen Pen

See also:

minPen(), setMajPen(), setPen(), QwtPainter::scaledPen()

void QwtPlotGrid::setPen (const QPen &pen)

Assign a pen for both major and minor gridlines

The width of non cosmetic pens is scaled according to the resolution of the paint device.

Parameters:

pen Pen

See also:

setMajPen(), setMinPen(), QwtPainter::scaledPen()

void QwtPlotGrid::setXDiv (const \fBQwtScaleDiv\fP &scaleDiv)

Assign an x axis scale division

Parameters:

scaleDiv Scale division

void QwtPlotGrid::setYDiv (const \fBQwtScaleDiv\fP &scaleDiv)

Assign a y axis division

Parameters:

scaleDiv Scale division

void QwtPlotGrid::updateScaleDiv (const \fBQwtScaleDiv\fP &xScaleDiv, const \fBQwtScaleDiv\fP &yScaleDiv)\fC [virtual]\fP

Update the grid to changes of the axes scale division

Parameters:

xScaleDiv Scale division of the x-axis

yScaleDiv Scale division of the y-axis

See also:

QwtPlot::updateAxes()

Reimplemented from QwtPlotItem.

bool QwtPlotGrid::xEnabled () const

Returns:

true if vertical gridlines are enabled

See also:

enableX()

bool QwtPlotGrid::xMinEnabled () const

Returns:

true if minor vertical gridlines are enabled

See also:

enableXMin()

const \fBQwtScaleDiv\fP & QwtPlotGrid::xScaleDiv () const

Returns:

the scale division of the x axis

bool QwtPlotGrid::yEnabled () const

Returns:

true if horizontal gridlines are enabled

See also:

enableY()

bool QwtPlotGrid::yMinEnabled () const

Returns:

true if minor horizontal gridlines are enabled

See also:

enableYMin()

const \fBQwtScaleDiv\fP & QwtPlotGrid::yScaleDiv () const

Returns:

the scale division of the y axis

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