# QHelpEngineCore Class Reference
## [[QtHelp](index.htm) module]
該QHelpEngineCore類提供了幫助系統的核心功能。[More...](#details)
繼承[QObject](qobject.html)。
通過繼承[QHelpEngine](qhelpengine.html)。
### Methods
* `__init__ (self, QString?collectionFile, QObject?parent?=?None)`
* `bool addCustomFilter (self, QString?filterName, QStringList?attributes)`
* `bool autoSaveFilter (self)`
* `QString collectionFile (self)`
* `bool copyCollectionFile (self, QString?fileName)`
* `QString currentFilter (self)`
* `QStringList customFilters (self)`
* `QVariant customValue (self, QString?key, QVariant?defaultValue?=?QVariant())`
* `QString documentationFileName (self, QString?namespaceName)`
* `QString error (self)`
* `QByteArray fileData (self, QUrl?url)`
* `list-of-QUrl files (self, QString?namespaceName, QStringList?filterAttributes, QString?extensionFilter?=?QString())`
* `QStringList filterAttributes (self)`
* `QStringList filterAttributes (self, QString?filterName)`
* `list-of-QStringList filterAttributeSets (self, QString?namespaceName)`
* `QUrl findFile (self, QUrl?url)`
* `dict-of-QString-QUrl linksForIdentifier (self, QString?id)`
* `bool registerDocumentation (self, QString?documentationFileName)`
* `QStringList registeredDocumentations (self)`
* `bool removeCustomFilter (self, QString?filterName)`
* `bool removeCustomValue (self, QString?key)`
* `setAutoSaveFilter (self, bool?save)`
* `setCollectionFile (self, QString?fileName)`
* `setCurrentFilter (self, QString?filterName)`
* `bool setCustomValue (self, QString?key, QVariant?value)`
* `bool setupData (self)`
* `bool unregisterDocumentation (self, QString?namespaceName)`
### Static Methods
* `QVariant metaData (QString?documentationFileName, QString?name)`
* `QString namespaceName (QString?documentationFileName)`
### Qt Signals
* `void currentFilterChanged (const QString&)`
* `void setupFinished ()`
* `void setupStarted ()`
* `void warning (const QString&)`
* * *
## Detailed Description
該QHelpEngineCore類提供了幫助系統的核心功能。
之前的幫助引擎可以被使用,它必須通過調用初始化[setupData](qhelpenginecore.html#setupData)( ) 。在安裝過程中的信號的開頭[setupStarted](qhelpenginecore.html#setupStarted)()被發射。從這點上,直到該信號[setupFinished](qhelpenginecore.html#setupFinished)( )被發射,是在一個不確定的意義不可用狀態的幫助數據。
核心幫助引擎可用于執行不同的任務。通過調用[linksForIdentifier](qhelpenginecore.html#linksForIdentifier)( )的引擎返回的URL中指定幫助系統內的文件位置。實際的文件數據可以通過調用retrived[fileData](qhelpenginecore.html#fileData)( ) 。相反,在這個類中的所有其他功能,[linksForIdentifier](qhelpenginecore.html#linksForIdentifier)( )取決于當前設置的自定義過濾器。根據不同的過濾器,該函數可能返回不同的點擊率。
每一個幫助引擎可以包含任意數量的自定義過濾器。自定義過濾器是由一個名稱來定義,并設置過濾器的屬性,并可以通過調用被添加到幫助引擎[addCustomFilter](qhelpenginecore.html#addCustomFilter)( ) 。類似的,它是通過調用刪除[removeCustomFilter](qhelpenginecore.html#removeCustomFilter)( ) 。[customFilters](qhelpenginecore.html#customFilters)( )返回所有定義的過濾器。
幫助引擎還提供了一個持續性的方式媲美ini文件或Windows注冊表項設置和讀取的值的可能性。欲了解更多信息,請參閱的setValue ( )或()的值。
這個類不提供任何GUI組件或功能的指標或內容。如果您需要這些使用的一個[QHelpEngine](qhelpengine.html)代替。
當創建一個自定義幫助觀眾觀眾可以通過寫其中可能包含不同的關鍵字被用于配置幫助引擎的自定義集合文件中進行配置。這些關鍵字和值和它們的含義可以在幫助信息中找到 [creating a custom help collection file](index.htm#creating-a-custom-help-collection-file)助理。
* * *
## Method Documentation
```
QHelpEngineCore.__init__ (self, QString?collectionFile, QObject?parent?=?None)
```
該_parent_的說法,如果不是沒有,原因_self_通過Qt的,而不是PyQt的擁有。
構造一個新的核心引擎的幫助用_parent_。幫助引擎使用存儲在信息_collectionFile_提供幫助。如果集合文件還不存在,它會被創建。
```
bool QHelpEngineCore.addCustomFilter (self, QString?filterName, QStringList?attributes)
```
添加新的自定義過濾器_filterName_。該過濾器的屬性被指定_attributes_。如果過濾器已經存在,它的屬性設置將被替換。該函數返回True如果操作成功,否則返回False 。
**See also** [customFilters](qhelpenginecore.html#customFilters)()和[removeCustomFilter](qhelpenginecore.html#removeCustomFilter)( ) 。
```
bool QHelpEngineCore.autoSaveFilter (self)
```
```
QString QHelpEngineCore.collectionFile (self)
```
```
bool QHelpEngineCore.copyCollectionFile (self, QString?fileName)
```
創建文件_fileName_如果成功,將文件從當前集合文件到新創建的文件中的所有內容,并返回True,否則返回False 。
在復制過程可確保文件引用的Qt收集文件(`.qch`)文件也會相應更新。
```
QString QHelpEngineCore.currentFilter (self)
```
```
QStringList QHelpEngineCore.customFilters (self)
```
返回自定義過濾器的列表。
**See also** [addCustomFilter](qhelpenginecore.html#addCustomFilter)()和[removeCustomFilter](qhelpenginecore.html#removeCustomFilter)( ) 。
```
QVariant QHelpEngineCore.customValue (self, QString?key, QVariant?defaultValue?=?QVariant())
```
返回賦予的價值_key_。如果請求的鍵不存在,則指定_defaultValue_返回。
**See also** [setCustomValue](qhelpenginecore.html#setCustomValue)()和[removeCustomValue](qhelpenginecore.html#removeCustomValue)( ) 。
```
QString QHelpEngineCore.documentationFileName (self, QString?namespaceName)
```
返回Qt的壓縮幫助文件確定的絕對文件名( 。 QCH )_namespaceName_。如果沒有注冊與指定的命名空間的Qt壓縮幫助文件,則返回一個空字符串。
**See also** [namespaceName](qhelpenginecore.html#namespaceName)( ) 。
```
QString QHelpEngineCore.error (self)
```
返回上次發生錯誤的描述。
```
QByteArray QHelpEngineCore.fileData (self, QUrl?url)
```
[](qbytearray.html)
[返回文件所指定的數據_url_。如果文件不存在,空](qbytearray.html)[QByteArray](qbytearray.html)返回。
**See also** [findFile](qhelpenginecore.html#findFile)( ) 。
```
list-of-QUrl QHelpEngineCore.files (self, QString?namespaceName, QStringList?filterAttributes, QString?extensionFilter?=?QString())
```
返回文件包含了Qt壓縮幫助文件中的列表_namespaceName_。該文件可以被過濾_filterAttributes_以及由它們的擴展名_extensionFilter_(例如,“ HTML” ) 。
```
QStringList QHelpEngineCore.filterAttributes (self)
```
返回所有定義的過濾器屬性列表。
```
QStringList QHelpEngineCore.filterAttributes (self, QString?filterName)
```
返回過濾器屬性所使用的自定義過濾器列表_filterName_。
```
list-of-QStringList QHelpEngineCore.filterAttributeSets (self, QString?namespaceName)
```
返回過濾器的屬性為Qt的壓縮幫助文件中定義與給定的命名空間中的不同的過濾器部分的列表_namespaceName_。
```
QUrl QHelpEngineCore.findFile (self, QUrl?url)
```
[
返回一個無效的URL ,如果該文件_url_無法找到。如果該文件存在,則返回無論是同一個URL或一個不同的URL ,如果該文件位于這是通過一個共同的虛擬文件夾合并不同的命名空間。
```
dict-of-QString-QUrl QHelpEngineCore.linksForIdentifier (self, QString?id)
```
返回命中發現了一個地圖_id_。一擊中的包含文件的標題和URL所在的關鍵字的位置。其結果取決于當前的過濾器,這意味著只有注冊為當前過濾器的關鍵字將被退回。
```
QVariant QHelpEngineCore.metaData (QString?documentationFileName, QString?name)
```
返回的元數據Qt的壓縮幫助文件_documentationFileName_。如果沒有可用的無數據_name_,一個無效的QVariant ( )返回。元數據是指創建Qt的壓縮幫助文件時,不能在以后修改。通用元數據包括例如文檔的作者。
```
QString QHelpEngineCore.namespaceName (QString?documentationFileName)
```
返回由指定Qt的壓縮幫助文件中定義的命名空間名稱( QCH )其_documentationFileName_。如果該文件是無效的,則返回一個空字符串。
](qurl.html)
[**See also**](qurl.html) [documentationFileName](qhelpenginecore.html#documentationFileName)( ) 。
```
bool QHelpEngineCore.registerDocumentation (self, QString?documentationFileName)
```
寄存器文件中包含了Qt壓縮的幫助文件( 。 QCH )_documentationFileName_。一個壓縮的幫助文件,其命名空間唯一標識,只能注冊一次。返回True ,如果注冊成功,否則為False。
**See also** [unregisterDocumentation](qhelpenginecore.html#unregisterDocumentation)()和[error](qhelpenginecore.html#error)( ) 。
```
QStringList QHelpEngineCore.registeredDocumentations (self)
```
返回當前集合文件的所有已注冊的Qt壓縮幫助文件的列表。返回的名稱是注冊的Qt壓縮的幫助文件(。 QCH )的命名空間。
```
bool QHelpEngineCore.removeCustomFilter (self, QString?filterName)
```
返回True如果過濾器_filterName_成功移除,否則為False 。
**See also** [addCustomFilter](qhelpenginecore.html#addCustomFilter)()和[customFilters](qhelpenginecore.html#customFilters)( ) 。
```
bool QHelpEngineCore.removeCustomValue (self, QString?key)
```
移除_key_從集合文件中的設置部分。如果該值被刪除成功,否則為False ,則返回True 。
**See also** [customValue](qhelpenginecore.html#customValue)()和[setCustomValue](qhelpenginecore.html#setCustomValue)( ) 。
```
QHelpEngineCore.setAutoSaveFilter (self, bool?save)
```
```
QHelpEngineCore.setCollectionFile (self, QString?fileName)
```
```
QHelpEngineCore.setCurrentFilter (self, QString?filterName)
```
```
bool QHelpEngineCore.setCustomValue (self, QString?key, QVariant?value)
```
保存_value_下_key_。如果鍵已經存在,則該值將被復蓋。返回True如果該值已成功保存,否則為False 。
**See also** [customValue](qhelpenginecore.html#customValue)()和[removeCustomValue](qhelpenginecore.html#removeCustomValue)( ) 。
```
bool QHelpEngineCore.setupData (self)
```
設置了幫助發動機通過處理發現在收集文件并返回True,如果成功的信息,否則返回False 。
通過調用函數時,幫助引擎是被迫立即初始化。大部分的時間,這個功能并沒有被顯式調用,因為它依賴于正確設置了幫助發動機getter函數做自己。
**Note:** `qsqlite4.dll`需要部署的應用程序加載的幫助集合時幫助系統使用sqlite的驅動程序。
```
bool QHelpEngineCore.unregisterDocumentation (self, QString?namespaceName)
```
注銷確定其Qt的壓縮的幫助文件( 。 QCH )_namespaceName_從幫助集合。成功時返回TRUE ,否則返回False 。
**See also** [registerDocumentation](qhelpenginecore.html#registerDocumentation)()和[error](qhelpenginecore.html#error)( ) 。
* * *
## Qt Signal Documentation
```
void currentFilterChanged (const QString&)
```
這是該信號的默認超載。
當電流過濾器改變為這個信號被發射_newFilter_。
```
void setupFinished ()
```
這是該信號的默認超載。
當設置完成后這個信號被發射。
```
void setupStarted ()
```
這是該信號的默認超載。
當安裝程序啟動這個信號被發射。
```
void warning (const QString&)
```
這是該信號的默認超載。
當一個非關鍵性錯誤發生時,這個信號被發射。警告消息存儲在_msg_。
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- QPyDesignerContainerExtension Class Reference
- QPyDesignerCustomWidgetCollectionPlugin Class Reference
- QPyDesignerCustomWidgetPlugin Class Reference
- QPyDesignerMemberSheetExtension Class Reference
- QPyDesignerPropertySheetExtension Class Reference
- QPyDesignerTaskMenuExtension Class Reference
- QPyNullVariant Class Reference
- QPyTextObject Class Reference
- QQuaternion Class Reference
- QRadialGradient Class Reference
- QRadioButton Class Reference
- QRawFont Class Reference
- QReadLocker Class Reference
- QReadWriteLock Class Reference
- QRect Class Reference
- QRectF Class Reference
- QRegExp Class Reference
- QRegExpValidator Class Reference
- QRegion Class Reference
- QResizeEvent Class Reference
- QResource Class Reference
- QRubberBand Class Reference
- QRunnable Class Reference
- QScriptClass Class Reference
- QScriptClassPropertyIterator Class Reference
- QScriptContext Class Reference
- QScriptContextInfo Class Reference
- QScriptEngine Class Reference
- QScriptEngineAgent Class Reference
- QScriptEngineDebugger Class Reference
- QScriptString Class Reference
- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- 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文檔翻譯:Qt樣式單參考,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
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- 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
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- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
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- QUrl Class Reference
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- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
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- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
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- QWebHistory Class Reference
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- QWebHitTestResult Class Reference
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- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
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- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
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- 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
- 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