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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

Reimplemented Public Functions

• 6 public functions inherited from QAbstractGraphicsShapeItem
• 177 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 )

Constructs a QGraphicsPolygonItem. parent is passed to QAbstractGraphicsShapeItem's constructor.

See also QGraphicsScene::addItem().

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

Constructs a QGraphicsPolygonItem with polygon as the default polygon. parent is passed to QAbstractGraphicsShapeItem's constructor.

See also QGraphicsScene::addItem().

QGraphicsPolygonItem::~QGraphicsPolygonItem ()

Destroys the QGraphicsPolygonItem.

QRectF QGraphicsPolygonItem::boundingRect () const   [virtual]

Reimplemented from QGraphicsItem::boundingRect().

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

Reimplemented from QGraphicsItem::contains().

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().

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

Reimplemented from QGraphicsItem::isObscuredBy().

QPainterPath QGraphicsPolygonItem::opaqueArea () const   [virtual]

Reimplemented from QGraphicsItem::opaqueArea().

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

Reimplemented from QGraphicsItem::paint().

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().

QPainterPath QGraphicsPolygonItem::shape () const   [virtual]

Reimplemented from QGraphicsItem::shape().

int QGraphicsPolygonItem::type () const   [virtual]

Reimplemented from QGraphicsItem::type().