# QGraphicsEllipseItem Class Reference
## [[QtGui](index.htm) module]
该QGraphicsEllipseItem类提供了一个椭圆形项目，你可以添加到[QGraphicsScene](qgraphicsscene.html)。[More...](#details)
继承[QAbstractGraphicsShapeItem](qabstractgraphicsshapeitem.html)。
### Methods
* `__init__ (self, QGraphicsItem parent = None, QGraphicsScene scene = None)`
* `__init__ (self, QRectF rect, QGraphicsItem parent = None, QGraphicsScene scene = None)`
* `__init__ (self, float x, float y, float w, float h, QGraphicsItem parent = None, QGraphicsScene scene = None)`
* `QRectF boundingRect (self)`
* `bool contains (self, QPointF point)`
* `bool isObscuredBy (self, QGraphicsItem item)`
* `QPainterPath opaqueArea (self)`
* `paint (self, QPainter painter, QStyleOptionGraphicsItem option, QWidget widget = None)`
* `QRectF rect (self)`
* `setRect (self, QRectF rect)`
* `setRect (self, float ax, float ay, float w, float h)`
* `setSpanAngle (self, int angle)`
* `setStartAngle (self, int angle)`
* `QPainterPath shape (self)`
* `int spanAngle (self)`
* `int startAngle (self)`
* `int type (self)`
* * *
## Detailed Description
该QGraphicsEllipseItem类提供了一个椭圆形项目，你可以添加到[QGraphicsScene](qgraphicsscene.html)。
QGraphicsEllipseItem respresents用填充和轮廓的椭圆形，而且你还可以使用它的椭圆段（见[startAngle](qgraphicsellipseitem.html#startAngle)（ ）[spanAngle](qgraphicsellipseitem.html#spanAngle)（））。
|  |  |
要设置项目的椭圆形，传递[QRectF](qrectf.html)到QGraphicsEllipseItem的构造函数，或调用[setRect](qgraphicsellipseitem.html#setRect)（ ） 。该[rect](qgraphicsellipseitem.html#rect)（ ）函数返回当前的椭圆形状。
QGraphicsEllipseItem使用矩形和钢笔的宽度，以提供合理的实施[boundingRect](qgraphicsellipseitem.html#boundingRect)（ ）[shape](qgraphicsellipseitem.html#shape)（）和[contains](qgraphicsellipseitem.html#contains)（ ） 。该[paint](qgraphicsellipseitem.html#paint)（ ）函数绘制使用该项目的相关的画笔和画刷的椭圆，它可以通过调用设置[setPen](qabstractgraphicsshapeitem.html#setPen)（）和[setBrush](qabstractgraphicsshapeitem.html#setBrush)（ ） 。
* * *
## Method Documentation
```
QGraphicsEllipseItem.__init__ (self, QGraphicsItem parent = None, QGraphicsScene scene = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
该_scene_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QGraphicsEllipseItem](qgraphicsellipseitem.html)。_parent_被传递给[QAbstractGraphicsShapeItem](qabstractgraphicsshapeitem.html)的构造。
**See also** [QGraphicsScene.addItem](qgraphicsscene.html#addItem)（ ） 。
```
QGraphicsEllipseItem.__init__ (self, QRectF rect, QGraphicsItem parent = None, QGraphicsScene scene = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
该_scene_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QGraphicsEllipseItem](qgraphicsellipseitem.html) using _rect_作为默认的矩形。_parent_被传递给[QAbstractGraphicsShapeItem](qabstractgraphicsshapeitem.html)的构造。
**See also** [QGraphicsScene.addItem](qgraphicsscene.html#addItem)（ ） 。
```
QGraphicsEllipseItem.__init__ (self, float x, float y, float w, float h, QGraphicsItem parent = None, QGraphicsScene scene = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
该_scene_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QGraphicsEllipseItem](qgraphicsellipseitem.html)使用由（定义的矩形_x_，_y_）和给定的_width_和_height_，作为默认的矩形。_parent_被传递给[QAbstractGraphicsShapeItem](qabstractgraphicsshapeitem.html)的构造。
此功能被引入Qt的4.3 。
**See also** [QGraphicsScene.addItem](qgraphicsscene.html#addItem)（ ） 。
```
QRectF QGraphicsEllipseItem.boundingRect (self)
```
[](qrectf.html)
[从重新实现](qrectf.html)[QGraphicsItem.boundingRect](qgraphicsitem.html#boundingRect)（ ） 。
```
bool QGraphicsEllipseItem.contains (self, QPointF point)
```
从重新实现[QGraphicsItem.contains](qgraphicsitem.html#contains)（ ） 。
```
bool QGraphicsEllipseItem.isObscuredBy (self, QGraphicsItem item)
```
从重新实现[QGraphicsItem.isObscuredBy](qgraphicsitem.html#isObscuredBy)（ ） 。
```
QPainterPath QGraphicsEllipseItem.opaqueArea (self)
```
[](qpainterpath.html)
[从重新实现](qpainterpath.html)[QGraphicsItem.opaqueArea](qgraphicsitem.html#opaqueArea)（ ） 。
```
QGraphicsEllipseItem.paint (self, QPainter painter, QStyleOptionGraphicsItem option, QWidget widget = None)
```
从重新实现[QGraphicsItem.paint](qgraphicsitem.html#paint)（ ） 。
```
QRectF QGraphicsEllipseItem.rect (self)
```
[](qrectf.html)
[返回该项目的椭圆几何体作为一个](qrectf.html)[QRectF](qrectf.html)。
**See also** [setRect](qgraphicsellipseitem.html#setRect)（）和[QPainter.drawEllipse](qpainter.html#drawEllipse)（ ） 。
```
QGraphicsEllipseItem.setRect (self, QRectF rect)
```
设置项的椭圆几何_rect_。矩形的左边缘定义椭圆的左边缘，并且矩形的顶边描述了椭圆形的顶部。矩形的高度和宽度描述椭圆的高度和宽度。
**See also** [rect](qgraphicsellipseitem.html#rect)（）和[QPainter.drawEllipse](qpainter.html#drawEllipse)（ ） 。
```
QGraphicsEllipseItem.setRect (self, float ax, float ay, float w, float h)
```
设置项的矩形，由（定义的矩形_x_，_y_）和给定的_width_和_height_。
这个方便的功能等同于调用`setRect(QRectF(x, y, width, height))`
**See also** [rect](qgraphicsellipseitem.html#rect)（ ） 。
```
QGraphicsEllipseItem.setSpanAngle (self, int angle)
```
设置为椭圆段的跨度角_angle_，这在一定程度的16份。这个角度被一起使用[startAngle](qgraphicsellipseitem.html#startAngle)（）表示一个椭圆形段（馅饼） 。默认情况下，跨度角为5760 （ 360 * 16 ，一个完整的椭圆） 。
**See also** [spanAngle](qgraphicsellipseitem.html#spanAngle)（ ）[setStartAngle](qgraphicsellipseitem.html#setStartAngle)（）和[QPainter.drawPie](qpainter.html#drawPie)（ ） 。
```
QGraphicsEllipseItem.setStartAngle (self, int angle)
```
设置为椭圆段的起始角度_angle_，这在一定程度的16份。这个角度被一起使用[spanAngle](qgraphicsellipseitem.html#spanAngle)（ ）来表示椭圆段（饼图） 。默认情况下，起始角度为0 。
**See also** [startAngle](qgraphicsellipseitem.html#startAngle)（ ）[setSpanAngle](qgraphicsellipseitem.html#setSpanAngle)（）和[QPainter.drawPie](qpainter.html#drawPie)（ ） 。
```
QPainterPath QGraphicsEllipseItem.shape (self)
```
[](qpainterpath.html)
[从重新实现](qpainterpath.html)[QGraphicsItem.shape](qgraphicsitem.html#shape)（ ） 。
```
int QGraphicsEllipseItem.spanAngle (self)
```
返回一定程度的16份椭圆段的跨度角度。这个角度被一起使用[startAngle](qgraphicsellipseitem.html#startAngle)（ ）来表示椭圆段（饼图） 。默认情况下，这个函数返回5760 （ 360 * 16 ，一个完整的椭圆） 。
**See also** [setSpanAngle](qgraphicsellipseitem.html#setSpanAngle)（）和[startAngle](qgraphicsellipseitem.html#startAngle)（ ） 。
```
int QGraphicsEllipseItem.startAngle (self)
```
返回一定程度的16份为椭圆段的起始角度。这个角度被一起使用[spanAngle](qgraphicsellipseitem.html#spanAngle)（ ）来表示椭圆段（饼图） 。默认情况下，起始角度为0 。
**See also** [setStartAngle](qgraphicsellipseitem.html#setStartAngle)（）和[spanAngle](qgraphicsellipseitem.html#spanAngle)（ ） 。
```
int QGraphicsEllipseItem.type (self)
```
从重新实现[QGraphicsItem.type](qgraphicsitem.html#type)（ ） 。
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- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference