qwtstdvectordata.3

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.TH "QwtStdVectorData" 3 "4 Nov 2003" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtStdVectorData \- 
.SH SYNOPSIS
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Inherits \fBQwtData\fP.
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.SH "Detailed Description"
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Data class containing two std::vector<double> objects. 

QwtStdVectorData shows how to speed up calls to \fBboundingRect()\fP by caching. Caching is safe due to the copy semantics of std::vector (immediate copy on assignment). 
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.SS "Public Member Functions"

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.RI "\fBQwtStdVectorData\fP (const  std::vector< double > &x, const  std::vector< double > &y)"
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.RI "\fBQwtStdVectorData\fP & \fBoperator=\fP (const  \fBQwtStdVectorData\fP &)"
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.RI "virtual \fBQwtData\fP * \fBcopy\fP () const "
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.RI "virtual size_t \fBsize\fP () const "
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.RI "virtual double \fBx\fP (size_t i) const "
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.RI "virtual double \fBy\fP (size_t i) const "
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.RI "virtual \fBQwtDoubleRect\fP \fBboundingRect\fP () const "
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.SH "Constructor & Destructor Documentation"
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.SS "QwtStdVectorData::QwtStdVectorData (const std::vector< double > & x, const std::vector< double > & y)"
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Constructor
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\fBSee also:\fP
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\fBQwtCurve::setData\fP and \fBQwtPlot::setCurveData\fP. 
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.SH "Member Function Documentation"
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.SS "\fBQwtDoubleRect\fP QwtStdVectorData::boundingRect () const\fC [virtual]\fP"
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Returns the bounding rectangle of the data. If there is no bounding rect, like for empty data the rectangle is invalid: \fBQwtDoubleRect::isValid()\fP == FALSE Reimplemented from \fBQwtData\fP.
.SS "\fBQwtData\fP * QwtStdVectorData::copy () const\fC [virtual]\fP"
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Return a pointer to a copy (virtual copy constructor) Implements \fBQwtData\fP.
.SS "size_t QwtStdVectorData::size () const\fC [virtual]\fP"
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Return the size of the data set Implements \fBQwtData\fP.
.SS "double QwtStdVectorData::x (size_t i) const\fC [virtual]\fP"
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Return the x value of data point i 
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\fBParameters:\fP
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\fIi\fP Index 
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\fBReturns:\fP
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x X value of data point i 
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Implements \fBQwtData\fP.
.SS "double QwtStdVectorData::y (size_t i) const\fC [virtual]\fP"
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Return the y value of data point i 
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\fBParameters:\fP
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\fIi\fP Index 
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\fBReturns:\fP
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y Y value of data point i 
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Implements \fBQwtData\fP.

.SH "Author"
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