內容

• 公共函數
• 重實現公共函數
• 詳細描述

QGraphicsPolygonItem 類

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

頭：	#include <QGraphicsPolygonItem>
qmake:	QT += widgets
Since:	Qt 4.2
繼承：	QAbstractGraphicsShapeItem

• 所有成員列錶，包括繼承成員

公共函數

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

重實現公共函數

virtual QRectF	boundingRect () const
virtual bool	contains (const QPointF & point ) const
virtual bool	isObscuredBy (const QGraphicsItem * item ) const
virtual QPainterPath	opaqueArea () const
virtual void	paint (QPainter * painter , const QStyleOptionGraphicsItem * option , QWidget * widget = Q_NULLPTR)
virtual QPainterPath	shape () const
virtual int	type () const

• 6 公共函數繼承自 QAbstractGraphicsShapeItem
• 176 公共函數繼承自 QGraphicsItem

額外繼承成員

• 2 靜態公共成員繼承自 QGraphicsItem
• 24 保護函數繼承自 QGraphicsItem

詳細描述

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

要設置項的多邊形，傳遞 QPolygonF to QGraphicsPolygonItem 's constructor, or call the setPolygon () 函數。 polygon () 函數返迴當前多邊形。

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

另請參閱 QGraphicsPathItem , QGraphicsRectItem , QGraphicsEllipseItem , QGraphicsTextItem , QGraphicsLineItem , QGraphicsPixmapItem ，和 圖形視圖框架 .

成員函數文檔編製

QGraphicsPolygonItem:: QGraphicsPolygonItem ( QGraphicsItem * parent = Q_NULLPTR)

構造 QGraphicsPolygonItem . parent 被傳遞給 QAbstractGraphicsShapeItem 的構造函數。

另請參閱 QGraphicsScene::addItem ().

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

構造 QGraphicsPolygonItem with polygon 作為默認多邊形。 parent 被傳遞給 QAbstractGraphicsShapeItem 的構造函數。

另請參閱 QGraphicsScene::addItem ().

QGraphicsPolygonItem:: ~QGraphicsPolygonItem ()

銷毀 QGraphicsPolygonItem .

[虛擬] QRectF QGraphicsPolygonItem:: boundingRect () const

重實現自 QGraphicsItem::boundingRect ().

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

重實現自 QGraphicsItem::contains ().

Qt::FillRule QGraphicsPolygonItem:: fillRule () const

返迴多邊形填充規則。默認填充規則為 Qt::OddEvenFill .

另請參閱 setFillRule (), QPainterPath::fillRule ()，和 QPainter::drawPolygon ().

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

重實現自 QGraphicsItem::isObscuredBy ().

[虛擬] QPainterPath QGraphicsPolygonItem:: opaqueArea () const

重實現自 QGraphicsItem::opaqueArea ().

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

重實現自 QGraphicsItem::paint ().

QPolygonF QGraphicsPolygonItem:: polygon () const

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

另請參閱 setPolygon ().

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

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

另請參閱 fillRule (), QPainterPath::fillRule ()，和 QPainter::drawPolygon ().

void QGraphicsPolygonItem:: setPolygon (const QPolygonF & polygon )

將項的多邊形設為給定 polygon .

另請參閱 polygon ().

[虛擬] QPainterPath QGraphicsPolygonItem:: shape () const

重實現自 QGraphicsItem::shape ().

[虛擬] int QGraphicsPolygonItem:: type () const

重實現自 QGraphicsItem::type ().