# QPaintEngineState Class Reference
## [[QtGui](index.htm) module]
该QPaintEngineState类提供有关活动的绘图引擎的当前状态信息。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, QPaintEngineState)`
* `QBrush backgroundBrush (self)`
* `Qt.BGMode backgroundMode (self)`
* `QBrush brush (self)`
* `bool brushNeedsResolving (self)`
* `QPointF brushOrigin (self)`
* `Qt.ClipOperation clipOperation (self)`
* `QPainterPath clipPath (self)`
* `QRegion clipRegion (self)`
* `QPainter.CompositionMode compositionMode (self)`
* `QFont font (self)`
* `bool isClipEnabled (self)`
* `QMatrix matrix (self)`
* `float opacity (self)`
* `QPainter painter (self)`
* `QPen pen (self)`
* `bool penNeedsResolving (self)`
* `QPainter.RenderHints renderHints (self)`
* `QPaintEngine.DirtyFlags state (self)`
* `QTransform transform (self)`
* * *
## Detailed Description
该QPaintEngineState类提供有关活动的绘图引擎的当前状态信息。
哪些属性，自上一次绘图引擎进行了更新，以及它们的当前值已经改变QPaintEngineState记录。
这已更改的属性可以在任何时候使用被检索的[state](qpaintenginestate.html#state)（）函数。这个函数返回的一个实例[QPaintEngine.DirtyFlags](qpaintengine.html#DirtyFlag-enum)其中存储的一个或组合型[QPaintEngine.DirtyFlag](qpaintengine.html#DirtyFlag-enum)值。该[QPaintEngine.DirtyFlag](qpaintengine.html#DirtyFlag-enum)枚举定义了自上次更新还是不是一个属性是否已更改。
如果属性是标有一个肮脏的标志，其当前值可以使用相应的get函数来检索：
| Property Flag | Current Property Value |
| --- | --- |
| [QPaintEngine.DirtyBackground](qpaintengine.html#DirtyFlag-enum) | [backgroundBrush](qpaintenginestate.html#backgroundBrush)() |
| [QPaintEngine.DirtyBackgroundMode](qpaintengine.html#DirtyFlag-enum) | [backgroundMode](qpaintenginestate.html#backgroundMode)() |
| [QPaintEngine.DirtyBrush](qpaintengine.html#DirtyFlag-enum) | [brush](qpaintenginestate.html#brush)() |
| [QPaintEngine.DirtyBrushOrigin](qpaintengine.html#DirtyFlag-enum) | [brushOrigin](qpaintenginestate.html#brushOrigin)() |
| [QPaintEngine.DirtyClipRegion](qpaintengine.html#DirtyFlag-enum) _or_ [QPaintEngine.DirtyClipPath](qpaintengine.html#DirtyFlag-enum) | [clipOperation](qpaintenginestate.html#clipOperation)() |
| [QPaintEngine.DirtyClipPath](qpaintengine.html#DirtyFlag-enum) | [clipPath](qpaintenginestate.html#clipPath)() |
| [QPaintEngine.DirtyClipRegion](qpaintengine.html#DirtyFlag-enum) | [clipRegion](qpaintenginestate.html#clipRegion)() |
| [QPaintEngine.DirtyCompositionMode](qpaintengine.html#DirtyFlag-enum) | [compositionMode](qpaintenginestate.html#compositionMode)() |
| [QPaintEngine.DirtyFont](qpaintengine.html#DirtyFlag-enum) | [font](qpaintenginestate.html#font)() |
| [QPaintEngine.DirtyTransform](qpaintengine.html#DirtyFlag-enum) | [transform](qpaintenginestate.html#transform)() |
| [QPaintEngine.DirtyClipEnabled](qpaintengine.html#DirtyFlag-enum) | [isClipEnabled](qpaintenginestate.html#isClipEnabled)() |
| [QPaintEngine.DirtyPen](qpaintengine.html#DirtyFlag-enum) | [pen](qpaintenginestate.html#pen)() |
| [QPaintEngine.DirtyHints](qpaintengine.html#DirtyFlag-enum) | [renderHints](qpaintenginestate.html#renderHints)() |
该QPaintEngineState类还提供了[painter](qpaintenginestate.html#painter)（ ）函数返回一个指针，指向当前正在更新的绘图引擎的画家。
这个类，即主动绘图引擎的当前状态的一个实例，作为参数传递给[QPaintEngine.updateState](qpaintengine.html#updateState)（）函数。实现自己的绘图引擎时，你将不得不直接使用这个类的唯一情况是。
* * *
## Method Documentation
```
QPaintEngineState.__init__ (self)
```
```
QPaintEngineState.__init__ (self, QPaintEngineState)
```
```
QBrush QPaintEngineState.backgroundBrush (self)
```
[
返回当前绘图引擎状态的背景刷。
](qbrush.html)
[这个变量应该只用来当](qbrush.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyBackground](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
Qt.BGMode QPaintEngineState.backgroundMode (self)
```
[
返回后台模式在当前的绘图引擎的状态。
](qt.html#BGMode-enum)
[这个变量应该只用来当](qt.html#BGMode-enum)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyBackgroundMode](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QBrush QPaintEngineState.brush (self)
```
[
返回当前绘图引擎状态的笔刷。
](qbrush.html)
[这个变量应该只用来当](qbrush.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyBrush](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
bool QPaintEngineState.brushNeedsResolving (self)
```
返回填充的坐标是否已被指定为界由当前的渲染操作和必须解决（关于当前呈现的原语） 。
此功能被引入Qt的4.3 。
```
QPointF QPaintEngineState.brushOrigin (self)
```
[
返回当前绘图引擎状态的画刷原点。
](qpointf.html)
[这个变量应该只用来当](qpointf.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyBrushOrigin](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
Qt.ClipOperation QPaintEngineState.clipOperation (self)
```
[
返回当前绘图引擎状态的剪辑操作。
](qt.html#ClipOperation-enum)
[这个变量应该只用来当](qt.html#ClipOperation-enum)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括任[QPaintEngine.DirtyClipPath](qpaintengine.html#DirtyFlag-enum)或[QPaintEngine.DirtyClipRegion](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QPainterPath QPaintEngineState.clipPath (self)
```
[
返回当前绘图引擎状态的剪辑路径。
](qpainterpath.html)
[这个变量应该只用来当](qpainterpath.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyClipPath](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QRegion QPaintEngineState.clipRegion (self)
```
[
返回当前绘图引擎状态的剪辑区域。
](qregion.html)
[这个变量应该只用来当](qregion.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyClipRegion](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QPainter.CompositionMode QPaintEngineState.compositionMode (self)
```
[
返回组成模式在当前的绘图引擎的状态。
](qpainter.html#CompositionMode-enum)
[这个变量应该只用来当](qpainter.html#CompositionMode-enum)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyCompositionMode](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QFont QPaintEngineState.font (self)
```
[
返回当前绘图引擎状态的字体。
](qfont.html)
[这个变量应该只用来当](qfont.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyFont](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
bool QPaintEngineState.isClipEnabled (self)
```
返回剪裁是否启用或不在当前的绘图引擎的状态。
这个变量应该只用来当[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyClipEnabled](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QMatrix QPaintEngineState.matrix (self)
```
[
```
float QPaintEngineState.opacity (self)
```
返回当前绘图引擎状态的不透明度。
这个函数中引入了Qt 4.2中。
](qmatrix.html)
```
QPainter QPaintEngineState.painter (self)
```
[
返回一个指针，指向当前正在更新的绘图引擎的画家。
](qpainter.html)
```
QPen QPaintEngineState.pen (self)
```
[
返回当前绘图引擎状态的笔。
](qpen.html)
[这个变量应该只用来当](qpen.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyPen](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
bool QPaintEngineState.penNeedsResolving (self)
```
返回行程是否在坐标已被指定为界由当前渲染操作和必须解决（关于当前呈现的原语） 。
此功能被引入Qt的4.3 。
```
QPainter.RenderHints QPaintEngineState.renderHints (self)
```
[
返回当前绘图引擎状态的呈现提示。
](index.htm)
[这个变量应该只用来当](index.htm)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyHints](qpaintengine.html#DirtyFlag-enum)标志。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QPaintEngine.DirtyFlags QPaintEngineState.state (self)
```
[](index.htm)
[返回标志标识集，需要更新时，在调用期间更新绘图引擎的状态（即属性的组合](index.htm)[QPaintEngine.updateState](qpaintengine.html#updateState)（）函数） 。
**See also** [QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
```
QTransform QPaintEngineState.transform (self)
```
[
返回当前绘图引擎状态矩阵。
](qtransform.html)
[这个变量应该只用来当](qtransform.html)[state](qpaintenginestate.html#state)（ ）返回一个组合，其中包括[QPaintEngine.DirtyTransform](qpaintengine.html#DirtyFlag-enum)标志。
此功能被引入Qt的4.3 。
**See also** [state](qpaintenginestate.html#state)（）和[QPaintEngine.updateState](qpaintengine.html#updateState)（ ） 。
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- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文档翻译：Qt样式单参考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- 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
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- QToolButton Class Reference
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- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
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- 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
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- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
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- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
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- QWebSettings Class Reference
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- 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
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- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
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- 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
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- 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