Qt 4.2: QGraphicsPolygonItem Class Reference

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# QGraphicsPolygonItem Class Reference
[QtGui module]

The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene. More...

     #include <QGraphicsPolygonItem>

Inherits QAbstractGraphicsShapeItem.

This class was introduced in Qt 4.2.

- List of all members, including inherited members

### Public Functions

- QGraphicsPolygonItem ( QGraphicsItem * parent = 0, QGraphicsScene * scene = 0 )
- QGraphicsPolygonItem ( const QPolygonF & polygon, QGraphicsItem * parent = 0, QGraphicsScene * scene = 0 )
- ~QGraphicsPolygonItem ()
- Qt::FillRule fillRule () const
- QPolygonF polygon () const
- void setFillRule ( Qt::FillRule rule )
- void setPolygon ( const QPolygonF & polygon )

- 4 public functions inherited from QAbstractGraphicsShapeItem
- 105 public functions inherited from QGraphicsItem

### Additional Inherited Members

- 1 static public member inherited from QGraphicsItem
- 23 protected functions inherited from QGraphicsItem

## Detailed Description

The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene.

To set the item's polygon, pass a QPolygonF to QGraphicsPolygonItem's constructor, or call the setPolygon() function. The polygon() function returns the current polygon.

QGraphicsPolygonItem uses the polygon and the pen width to provide a reasonable implementation of boundingRect(), shape(), and contains(). The paint() function draws the polygon using the item's associated pen and brush, which you can set by calling the setPen() and setBrush() functions.

See also QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, and The Graphics View Framework.

## Member Function Documentation

### QGraphicsPolygonItem::QGraphicsPolygonItem ( QGraphicsItem * parent = 0, QGraphicsScene * scene = 0 )

Constructs a QGraphicsPolygonItem. The parent and scene parameters are passed to QAbstractGraphicsShapeItem's constructor.

### QGraphicsPolygonItem::QGraphicsPolygonItem ( const QPolygonF & polygon, QGraphicsItem * parent = 0, QGraphicsScene * scene = 0 )

Constructs a QGraphicsPolygonItem with polygon as the default polygon. The parent and scene parameters are passed to QAbstractGraphicsShapeItem's constructor.

### QGraphicsPolygonItem::~QGraphicsPolygonItem ()

Destroys the QGraphicsPolygonItem.

### Qt::FillRule QGraphicsPolygonItem::fillRule () const

Returns the fill rule of the polygon. The default fill rule is Qt::OddEvenFill.

See also setFillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().

### QPolygonF QGraphicsPolygonItem::polygon () const

Returns the item's polygon, or an empty polygon if no polygon has been set.

See also setPolygon().

### void QGraphicsPolygonItem::setFillRule ( Qt::FillRule rule )

Sets the fill rule of the polygon to rule. The default fill rule is Qt::OddEvenFill.

See also fillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().

### void QGraphicsPolygonItem::setPolygon ( const QPolygonF & polygon )

Sets the item's polygon to be the given polygon.

See also polygon().