qwtgrid.3

linux下qt的第三方的一个类

.TH "QwtGrid" 3 "16 Nov 2004" "Version 4.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtGrid \- 
.SH SYNOPSIS
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.PP
Inherited by \fBQwtPlotGrid\fP.
.PP
.SH "Detailed Description"
.PP 
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 \fBQwtGrid::setXDiv\fP and \fBQwtGrid::setYDiv()\fP The \fBdraw()\fP member draws the grid within a bounding rectangle. 
.PP
Definition at line 32 of file qwt_grid.h.
.SS "Public Member Functions"

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.RI "\fBQwtGrid\fP ()"
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.RI "virtual \fB~QwtGrid\fP ()"
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.RI "virtual void \fBdraw\fP (QPainter *p, const QRect &r, const \fBQwtDiMap\fP &mx, const \fBQwtDiMap\fP &my) const"
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.RI "void \fBenableX\fP (bool tf)"
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.RI "bool \fBxEnabled\fP () const"
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.RI "void \fBenableY\fP (bool tf)"
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.RI "bool \fByEnabled\fP () const"
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.RI "void \fBenableXMin\fP (bool tf)"
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.RI "bool \fBxMinEnabled\fP () const"
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.RI "void \fBenableYMin\fP (bool tf)"
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.RI "bool \fByMinEnabled\fP () const"
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.RI "void \fBsetXDiv\fP (const \fBQwtScaleDiv\fP &sx)"
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.RI "const \fBQwtScaleDiv\fP & \fBxScaleDiv\fP () const"
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.RI "void \fBsetYDiv\fP (const \fBQwtScaleDiv\fP &sy)"
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.RI "const \fBQwtScaleDiv\fP & \fByScaleDiv\fP () const"
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.RI "void \fBsetPen\fP (const QPen &p)"
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.RI "void \fBsetMajPen\fP (const QPen &p)"
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.RI "const QPen & \fBmajPen\fP () const"
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.RI "void \fBsetMinPen\fP (const QPen &p)"
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.RI "const QPen & \fBminPen\fP () const"
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.SS "Protected Member Functions"

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.RI "virtual void \fBgridChanged\fP ()"
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.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtGrid::QwtGrid ()"
.PP
Enables major grid, disables minor grid. 
.PP
Definition at line 15 of file qwt_grid.cpp.
.SS "QwtGrid::~\fBQwtGrid\fP ()\fC [virtual]\fP"
.PP
dtor 
.PP
Definition at line 24 of file qwt_grid.cpp.
.SH "Member Function Documentation"
.PP 
.SS "void QwtGrid::draw (QPainter * p, const QRect & r, const \fBQwtDiMap\fP & mx, const \fBQwtDiMap\fP & my) const\fC [virtual]\fP"
.PP
Draw the grid. 
.PP
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. 
.PP
\fBParameters:\fP
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\fIp\fP Painter 
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\fIr\fP Bounding rectangle 
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\fImx\fP X axis map 
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\fImy\fP Y axis 
.RE
.PP
Definition at line 170 of file qwt_grid.cpp.
.PP
References QwtPainter::drawLine(), QwtScaleDiv::majCnt(), QwtScaleDiv::majMark(), QwtScaleDiv::minCnt(), QwtScaleDiv::minMark(), and QwtDiMap::transform().
.PP
Referenced by QwtPlot::drawCanvasItems().
.SS "void QwtGrid::enableX (bool tf)"
.PP
Enable or disable vertical gridlines. 
.PP
\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable
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.PP
\fBSee also:\fP
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Minor gridlines can be enabled or disabled with \fBQwtGrid::enableXMin()\fP 
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.PP
Definition at line 35 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::enableGridX().
.SS "void QwtGrid::enableXMin (bool tf)"
.PP
Enable or disable minor vertical gridlines. 
.PP
\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable 
.RE
.PP
\fBSee also:\fP
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\fBQwtGrid::enableX()\fP 
.RE
.PP
Definition at line 63 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::enableGridXMin().
.SS "void QwtGrid::enableY (bool tf)"
.PP
Enable or disable horizontal gridlines. 
.PP
\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable 
.RE
.PP
\fBSee also:\fP
.RS 4
Minor gridlines can be enabled or disabled with \fBQwtGrid::enableYMin()\fP 
.RE
.PP
Definition at line 49 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::enableGridY().
.SS "void QwtGrid::enableYMin (bool tf)"
.PP
Enable or disable minor horizontal gridlines. 
.PP
\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable 
.RE
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\fBSee also:\fP
.RS 4
\fBQwtGrid::enableY()\fP 
.RE
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Definition at line 77 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::enableGridYMin().
.SS "void QwtGrid::gridChanged ()\fC [protected, virtual]\fP"
.PP
Notify a change of attributes. 
.PP
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. 
.PP
Reimplemented in \fBQwtPlotGrid\fP.
.PP
Definition at line 304 of file qwt_grid.cpp.
.PP
Referenced by enableX(), enableXMin(), enableY(), enableYMin(), setMajPen(), setMinPen(), setPen(), setXDiv(), and setYDiv().
.SS "const QPen & QwtGrid::majPen () const"
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\fBReturns:\fP
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the pen for the major gridlines 
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\fBSee also:\fP
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\fBQwtGrid::setMinPen\fP, \fBQwtGrid::setPen\fP 
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Definition at line 234 of file qwt_grid.cpp.
.PP
Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMajPen(), and QwtPlotPrintFilter::reset().
.SS "const QPen & QwtGrid::minPen () const"
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\fBReturns:\fP
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the pen for the minor gridlines 
.RE
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\fBSee also:\fP
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\fBQwtGrid::setMinPen\fP, \fBQwtGrid::setPen\fP 
.RE
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Definition at line 243 of file qwt_grid.cpp.
.PP
Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMinPen(), and QwtPlotPrintFilter::reset().
.SS "void QwtGrid::setMajPen (const QPen & p)"
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Assign a pen for the major gridlines. 
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\fBParameters:\fP
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\fIp\fP Pen 
.RE
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Definition at line 136 of file qwt_grid.cpp.
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References gridChanged().
.PP
Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMajPen().
.SS "void QwtGrid::setMinPen (const QPen & p)"
.PP
Assign a pen for the minor gridlines. 
.PP
\fBParameters:\fP
.RS 4
\fIp\fP Pen 
.RE
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Definition at line 149 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMinPen().
.SS "void QwtGrid::setPen (const QPen & p)"
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Assign a pen for both major and minor gridlines. 
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\fBParameters:\fP
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\fIp\fP Pen 
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Definition at line 122 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::setGridPen().
.SS "void QwtGrid::setXDiv (const \fBQwtScaleDiv\fP & sx)"
.PP
Assign an x axis scale division. 
.PP
\fBParameters:\fP
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\fIsx\fP Scale division 
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\fBWarning:\fP
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QwtGrid uses implicit sharing (see Qt Manual) for the scale divisions. 
.RE
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\fBSee also:\fP
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\fBQwtScaleDiv\fP 
.RE
.PP
Definition at line 93 of file qwt_grid.cpp.
.PP
References gridChanged().
.PP
Referenced by QwtPlot::setGridXAxis(), and QwtPlot::updateAxes().
.SS "void QwtGrid::setYDiv (const \fBQwtScaleDiv\fP & sy)"
.PP
Assign a y axis division. 
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\fBParameters:\fP
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\fIsy\fP Scale division 
.RE
.PP
\fBWarning:\fP
.RS 4
QwtGrid uses implicit sharing (see Qt Manual) for the scale divisions. 
.RE
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\fBSee also:\fP
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\fBQwtScaleDiv\fP 
.RE
.PP
Definition at line 109 of file qwt_grid.cpp.
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References gridChanged().
.PP
Referenced by QwtPlot::setGridYAxis(), and QwtPlot::updateAxes().
.SS "bool QwtGrid::xEnabled () const"
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\fBReturns:\fP
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TRUE if vertical gridlines are enabled 
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\fBSee also:\fP
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\fBQwtGrid::enableX\fP 
.RE
.PP
Definition at line 252 of file qwt_grid.cpp.
.PP
Referenced by QwtPlot::gridXEnabled().
.SS "bool QwtGrid::xMinEnabled () const"
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\fBReturns:\fP
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TRUE if minor vertical gridlines are enabled 
.RE
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\fBSee also:\fP
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\fBQwtGrid::enableXMin\fP 
.RE
.PP
Definition at line 261 of file qwt_grid.cpp.
.PP
Referenced by QwtPlot::gridXMinEnabled().
.SS "const \fBQwtScaleDiv\fP & QwtGrid::xScaleDiv () const"
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\fBReturns:\fP
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the scale division of the x axis 
.RE
.PP
Definition at line 286 of file qwt_grid.cpp.
.SS "bool QwtGrid::yEnabled () const"
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\fBReturns:\fP
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TRUE if horizontal gridlines are enabled 
.RE
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\fBSee also:\fP
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\fBQwtGrid::enableY\fP 
.RE
.PP
Definition at line 270 of file qwt_grid.cpp.
.PP
Referenced by QwtPlot::gridYEnabled().
.SS "bool QwtGrid::yMinEnabled () const"
.PP
\fBReturns:\fP
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TRUE if minor horizontal gridlines are enabled 
.RE
.PP
\fBSee also:\fP
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\fBQwtGrid::enableYMin\fP 
.RE
.PP
Definition at line 279 of file qwt_grid.cpp.
.PP
Referenced by QwtPlot::gridYMinEnabled().
.SS "const \fBQwtScaleDiv\fP & QwtGrid::yScaleDiv () const"
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\fBReturns:\fP
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the scale division of the y axis 
.RE
.PP
Definition at line 292 of file qwt_grid.cpp.

.SH "Author"
.PP 
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