Sources_For_Linux/Qwt/doc/man/man3/QwtCPointerData.3

.TH "QwtCPointerData" 3 "Mon Dec 28 2020" "Version 6.1.6" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtCPointerData \- Data class containing two pointers to memory blocks of doubles\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_point_data\&.h>\fP
.PP
Inherits \fBQwtSeriesData< QPointF >\fP\&.
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "\fBQwtCPointerData\fP (const double *x, const double *y, size_t \fBsize\fP)"
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.ti -1c
.RI "virtual QRectF \fBboundingRect\fP () const"
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.RI "Calculate the bounding rectangle\&. "
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.RI "virtual size_t \fBsize\fP () const"
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.RI "virtual QPointF \fBsample\fP (size_t index) const"
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.RI "const double * \fBxData\fP () const"
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.RI "const double * \fByData\fP () const"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
Data class containing two pointers to memory blocks of doubles\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtCPointerData::QwtCPointerData (const double * x, const double * y, size_t size)"
Constructor
.PP
\fBParameters\fP
.RS 4
\fIx\fP Array of x values 
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\fIy\fP Array of y values 
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\fIsize\fP Size of the x and y arrays
.RE
.PP
\fBWarning\fP
.RS 4
The programmer must assure that the memory blocks referenced by the pointers remain valid during the lifetime of the QwtPlotCPointer object\&.
.RE
.PP
\fBSee also\fP
.RS 4
\fBQwtPlotCurve::setData()\fP, \fBQwtPlotCurve::setRawSamples()\fP 
.RE
.PP

.SH "Member Function Documentation"
.PP 
.SS "QRectF QwtCPointerData::boundingRect () const\fC [virtual]\fP"

.PP
Calculate the bounding rectangle\&. The bounding rectangle is calculated once by iterating over all points and is stored for all following requests\&.
.PP
\fBReturns\fP
.RS 4
Bounding rectangle 
.RE
.PP

.SS "QPointF QwtCPointerData::sample (size_t index) const\fC [virtual]\fP"
Return the sample at position i
.PP
\fBParameters\fP
.RS 4
\fIindex\fP Index 
.RE
.PP
\fBReturns\fP
.RS 4
Sample at position i 
.RE
.PP

.PP
Implements \fBQwtSeriesData< QPointF >\fP\&.
.SS "size_t QwtCPointerData::size () const\fC [virtual]\fP"

.PP
\fBReturns\fP
.RS 4
Size of the data set 
.RE
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.SS "const double * QwtCPointerData::xData () const"

.PP
\fBReturns\fP
.RS 4
Array of the x-values 
.RE
.PP

.SS "const double * QwtCPointerData::yData () const"

.PP
\fBReturns\fP
.RS 4
Array of the y-values 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.