Contents

• Public Functions
• Reimplemented Public Functions
• Detailed Description

Detailed Description

TheQGraphicsPolygonItem class provides a polygon item that you can add to aQGraphicsScene.

To set the item's polygon, pass aQPolygonF toQGraphicsPolygonItem's constructor, or call thesetPolygon() function. Thepolygon() function returns the current polygon.

QGraphicsPolygonItem uses the polygon and the pen width to provide a reasonable implementation ofboundingRect(),shape(), andcontains(). Thepaint() function draws the polygon using the item's associated pen and brush, which you can set by calling thesetPen() andsetBrush() functions.

Member Function Documentation

QGraphicsPolygonItem::QGraphicsPolygonItem(QGraphicsItem * parent = 0)

Constructs aQGraphicsPolygonItem.parent is passed toQAbstractGraphicsShapeItem's constructor.

See alsoQGraphicsScene::addItem().

QGraphicsPolygonItem::QGraphicsPolygonItem(constQPolygonF & polygon,QGraphicsItem * parent = 0)

Constructs aQGraphicsPolygonItem withpolygon as the default polygon.parent is passed toQAbstractGraphicsShapeItem's constructor.

See alsoQGraphicsScene::addItem().

QGraphicsPolygonItem::~QGraphicsPolygonItem()

Destroys theQGraphicsPolygonItem.

[virtual]QRectF QGraphicsPolygonItem::boundingRect() const

Reimplemented fromQGraphicsItem::boundingRect().

[virtual]bool QGraphicsPolygonItem::contains(constQPointF & point) const

Reimplemented fromQGraphicsItem::contains().

Qt::FillRule QGraphicsPolygonItem::fillRule() const

Returns the fill rule of the polygon. The default fill rule isQt::OddEvenFill.

See alsosetFillRule(),QPainterPath::fillRule(), andQPainter::drawPolygon().

[virtual]bool QGraphicsPolygonItem::isObscuredBy(constQGraphicsItem * item) const

Reimplemented fromQGraphicsItem::isObscuredBy().

[virtual]QPainterPath QGraphicsPolygonItem::opaqueArea() const

Reimplemented fromQGraphicsItem::opaqueArea().

[virtual]void QGraphicsPolygonItem::paint(QPainter * painter, constQStyleOptionGraphicsItem * option,QWidget * widget = 0)

Reimplemented fromQGraphicsItem::paint().

QPolygonF QGraphicsPolygonItem::polygon() const

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

See alsosetPolygon().

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

Sets the fill rule of the polygon torule. The default fill rule isQt::OddEvenFill.

See alsofillRule(),QPainterPath::fillRule(), andQPainter::drawPolygon().

void QGraphicsPolygonItem::setPolygon(constQPolygonF & polygon)

Sets the item's polygon to be the givenpolygon.

See alsopolygon().

[virtual]QPainterPath QGraphicsPolygonItem::shape() const

Reimplemented fromQGraphicsItem::shape().

[virtual]int QGraphicsPolygonItem::type() const

Reimplemented fromQGraphicsItem::type().