内容

• 公共函数
• 详细描述

QXmlDeclHandler 类

QXmlDeclHandler 类提供报告 XML 数据声明内容的接口。 更多...

头：	#include <QXmlDeclHandler>
CMake:	find_package(Qt6 COMPONENTS Core5Compat REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Core5Compat)
qmake:	QT += core5compat
继承者：	QXmlDefaultHandler

• 所有成员列表，包括继承成员

注意： 此类的所有函数 可重入 .

公共函数

virtual	~QXmlDeclHandler ()
virtual bool	attributeDecl (const QString & eName , const QString & aName , const QString & type , const QString & valueDefault , const QString & value ) = 0
virtual QString	errorString () const = 0
virtual bool	externalEntityDecl (const QString & name , const QString & publicId , const QString & systemId ) = 0
virtual bool	internalEntityDecl (const QString & name , const QString & value ) = 0

详细描述

You can set the declaration handler with QXmlReader::setDeclHandler ().

This interface is based on the SAX2 extension DeclHandler.

The interface provides attributeDecl (), internalEntityDecl () 和 externalEntityDecl () 函数。

另请参阅 QXmlDTDHandler , QXmlContentHandler , QXmlEntityResolver , QXmlErrorHandler ，和 QXmlLexicalHandler .

成员函数文档编制

[虚拟] QXmlDeclHandler:: ~QXmlDeclHandler ()

Destroys the declaration handler.

[pure virtual] bool QXmlDeclHandler:: attributeDecl (const QString & eName , const QString & aName , const QString & type , const QString & valueDefault , const QString & value )

The reader calls this function to report an attribute type declaration. Only the effective (first) declaration for an attribute is reported.

The reader passes the name of the associated element in eName and the name of the attribute in aName . It passes a string that represents the attribute type in type and a string that represents the attribute default in valueDefault . This string is one of "#IMPLIED", "#REQUIRED", "#FIXED" or an empty string (if none of the others applies). The reader passes the attribute's default value in value . If no default value is specified in the XML file, value is an empty string.

若此函数返回 false the reader stops parsing and reports an error. The reader uses the function errorString () to get the error message.

[pure virtual] QString QXmlDeclHandler:: errorString () const

The reader calls this function to get an error string if any of the handler functions returns false .

[pure virtual] bool QXmlDeclHandler:: externalEntityDecl (const QString & name , const QString & publicId , const QString & systemId )

The reader calls this function to report a parsed external entity declaration. Only the effective (first) declaration for each entity is reported.

The reader passes the name of the entity in name , the public identifier in publicId and the system identifier in systemId . If there is no public identifier specified, it passes an empty string in publicId .

若此函数返回 false the reader stops parsing and reports an error. The reader uses the function errorString () to get the error message.

[pure virtual] bool QXmlDeclHandler:: internalEntityDecl (const QString & name , const QString & value )

The reader calls this function to report an internal entity declaration. Only the effective (first) declaration is reported.

The reader passes the name of the entity in name and the value of the entity in value .

若此函数返回 false the reader stops parsing and reports an error. The reader uses the function errorString () to get the error message.