---
name: "QwtPolygonFData"
section: "3"
platform: "linux"
package: "libqwt5-doc"
version: "5.2.3-1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtPolygonFData"
---

# QwtPolygonFData(3)

## NAME

QwtPolygonFData -

## SYNOPSIS

`#include <qwt_data.h>`

Inherits **QwtData**.

### Public Member Functions

**QwtPolygonFData** (const QPolygonF &)\
 virtual **QwtData** \* **copy** () const \
 const QPolygonF & **data** () const \
 **QwtPolygonFData** & **operator=** (const **QwtPolygonFData** &)\
 virtual size\_t **size** () const \
 virtual double **x** (size\_t i) const \
 virtual double **y** (size\_t i) const \

### Additional Inherited Members

## Detailed Description

Data class containing a single QwtArray\<QwtDoublePoint\> object.

## Constructor & Destructor Documentation

### QwtPolygonFData::QwtPolygonFData (const QPolygonF &polygon)

Constructor

**Parameters:**

*polygon* Polygon data

**See also:**

**QwtPlotCurve::setData()**

## Member Function Documentation

### QwtData \* QwtPolygonFData::copy () const` [virtual]`

**Returns:**

Pointer to a copy (virtual copy constructor)

Implements **QwtData**.

### const QPolygonF & QwtPolygonFData::data () const

**Returns:**

Point array

### size\_t QwtPolygonFData::size () const` [virtual]`

**Returns:**

Size of the data set

Implements **QwtData**.

### double QwtPolygonFData::x (size\_ti) const` [virtual]`

Return the x value of data point i

**Parameters:**

*i* Index

**Returns:**

x X value of data point i

Implements **QwtData**.

### double QwtPolygonFData::y (size\_ti) const` [virtual]`

Return the y value of data point i

**Parameters:**

*i* Index

**Returns:**

y Y value of data point i

Implements **QwtData**.

## Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.