Referencia de la Clase QDomElement

The QDomElement class represents one element in the DOM tree.XMLElements have a tagName() and zero or more attributes associated with them. The tag name can be changed with setTagName(). Más...

#include <qdom.h>

Diagrama de herencias de QDomElement

Lista de todos los miembros.

Métodos públicos
	QDomElement ()
	QDomElement (const QDomElement &x)
QDomElement &	operator= (const QDomElement &)
	~QDomElement ()
QString	attribute (const QString &name, const QString &defValue=QString::null) const
void	setAttribute (const QString &name, const QString &value)
void	setAttribute (const QString &name, int value)
void	setAttribute (const QString &name, uint value)
void	setAttribute (const QString &name, long value)
void	setAttribute (const QString &name, ulong value)
void	setAttribute (const QString &name, double value)
void	removeAttribute (const QString &name)
QDomAttr	attributeNode (const QString &name)
QDomAttr	setAttributeNode (const QDomAttr &newAttr)
QDomAttr	removeAttributeNode (const QDomAttr &oldAttr)
virtual QDomNodeList	elementsByTagName (const QString &tagname) const
bool	hasAttribute (const QString &name) const
QString	attributeNS (const QString nsURI, const QString &localName, const QString &defValue) const
void	setAttributeNS (const QString nsURI, const QString &qName, const QString &value)
void	setAttributeNS (const QString nsURI, const QString &qName, int value)
void	setAttributeNS (const QString nsURI, const QString &qName, uint value)
void	setAttributeNS (const QString nsURI, const QString &qName, long value)
void	setAttributeNS (const QString nsURI, const QString &qName, ulong value)
void	setAttributeNS (const QString nsURI, const QString &qName, double value)
void	removeAttributeNS (const QString &nsURI, const QString &localName)
QDomAttr	attributeNodeNS (const QString &nsURI, const QString &localName)
QDomAttr	setAttributeNodeNS (const QDomAttr &newAttr)
virtual QDomNodeList	elementsByTagNameNS (const QString &nsURI, const QString &localName) const
bool	hasAttributeNS (const QString &nsURI, const QString &localName) const
QString	tagName () const
void	setTagName (const QString &name)
QDomNamedNodeMap	attributes () const
QDomNode::NodeType	nodeType () const
bool	isElement () const
QString	text () const
	QDomElement ()
	QDomElement (const QDomElement &x)
QDomElement &	operator= (const QDomElement &)
	~QDomElement ()
QString	attribute (const QString &name, const QString &defValue=QString::null) const
void	setAttribute (const QString &name, const QString &value)
void	setAttribute (const QString &name, int value)
void	setAttribute (const QString &name, uint value)
void	setAttribute (const QString &name, long value)
void	setAttribute (const QString &name, ulong value)
void	setAttribute (const QString &name, double value)
void	removeAttribute (const QString &name)
QDomAttr	attributeNode (const QString &name)
QDomAttr	setAttributeNode (const QDomAttr &newAttr)
QDomAttr	removeAttributeNode (const QDomAttr &oldAttr)
virtual QDomNodeList	elementsByTagName (const QString &tagname) const
bool	hasAttribute (const QString &name) const
QString	attributeNS (const QString nsURI, const QString &localName, const QString &defValue) const
void	setAttributeNS (const QString nsURI, const QString &qName, const QString &value)
void	setAttributeNS (const QString nsURI, const QString &qName, int value)
void	setAttributeNS (const QString nsURI, const QString &qName, uint value)
void	setAttributeNS (const QString nsURI, const QString &qName, long value)
void	setAttributeNS (const QString nsURI, const QString &qName, ulong value)
void	setAttributeNS (const QString nsURI, const QString &qName, double value)
void	removeAttributeNS (const QString &nsURI, const QString &localName)
QDomAttr	attributeNodeNS (const QString &nsURI, const QString &localName)
QDomAttr	setAttributeNodeNS (const QDomAttr &newAttr)
virtual QDomNodeList	elementsByTagNameNS (const QString &nsURI, const QString &localName) const
bool	hasAttributeNS (const QString &nsURI, const QString &localName) const
QString	tagName () const
void	setTagName (const QString &name)
QDomNamedNodeMap	attributes () const
QDomNode::NodeType	nodeType () const
bool	isElement () const
QString	text () const
Amigas
class	QDomDocument
class	QDomNode
class	QDomAttr

---

Descripción detallada

The QDomElement class represents one element in the DOM tree.

XML

Elements have a tagName() and zero or more attributes associated with them. The tag name can be changed with setTagName().

Element attributes are represented by QDomAttr objects that can be queried using the attribute() and attributeNode() functions. You can set attributes with the setAttribute() and setAttributeNode() functions. Attributes can be removed with removeAttribute(). There are namespace-aware equivalents to these functions, i.e. setAttributeNS(), setAttributeNodeNS() and removeAttributeNS().

If you want to access the text of a node use text(), e.g.

    QDomElement e = //...
    //...
    QString s = e.text()

The text() function operates recursively to find the text (since not all elements contain text). If you want to find all the text in all of a node's children, iterate over the children looking for QDomText nodes, e.g.

    QString text;
    QDomElement element = doc.documentElement();
    for( QDomNode n = element.firstChild(); !n.isNull(); n = n.nextSibling() )
    {
        QDomText t = n.toText();
        if ( !t.isNull() )
            text += t.data();
    }

Note that we attempt to convert each node to a text node and use text() rather than using firstChild().toText().data() or n.toText().data() directly on the node, because the node may not be a text element.

You can get a list of all the decendents of an element which have a specified tag name with elementsByTagName() or elementsByTagNameNS().

For further information about the Document Object Model see http://www.w3.org/TR/REC-DOM-Level-1/ and http://www.w3.org/TR/DOM-Level-2-Core/. For a more general introduction of the DOM implementation see the QDomDocument documentation.

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Documentación del constructor y destructor

QDomElement::QDomElement

(

)

Constructs an empty element. Use the QDomDocument::createElement() function to construct elements with content.

QDomElement::QDomElement

(

const QDomElement &

x

)

Constructs a copy of x.

The data of the copy is shared (shallow copy): modifying one node will also change the other. If you want to make a deep copy, use cloneNode().

QDomElement::~QDomElement

(

)

Destroys the object and frees its resources.

QDomElement::QDomElement

(

)

QDomElement::QDomElement

(

const QDomElement &

x

)

QDomElement::~QDomElement

(

)

---

Documentación de las funciones miembro

QString QDomElement::attribute	(	const QString &	name,
		const QString &	defValue = QString::null
	)		const

Returns the attribute called name. If the attribute does not exist defValue is returned.

Ver también:

setAttribute() attributeNode() setAttributeNode() attributeNS()

QString QDomElement::attribute	(	const QString &	name,
		const QString &	defValue = QString::null
	)		const

QDomAttr QDomElement::attributeNode

(

const QString &

name

)

Returns the QDomAttr object that corresponds to the attribute called name. If no such attribute exists a null attribute is returned.

Ver también:

setAttributeNode() attribute() setAttribute() attributeNodeNS()

QDomAttr QDomElement::attributeNode

(

const QString &

name

)

QDomAttr QDomElement::attributeNodeNS	(	const QString &	nsURI,
		const QString &	localName
	)

Returns the QDomAttr object that corresponds to the attribute with the local name localName and the namespace URI nsURI. If no such attribute exists a null attribute is returned.

Ver también:

setAttributeNode() attribute() setAttribute() attributeNodeNS()

QDomAttr QDomElement::attributeNodeNS	(	const QString &	nsURI,
		const QString &	localName
	)

QString QDomElement::attributeNS	(	const QString	nsURI,
		const QString &	localName,
		const QString &	defValue
	)		const

QString QDomElement::attributeNS	(	const QString	nsURI,
		const QString &	localName,
		const QString &	defValue
	)		const

Returns the attribute with the local name localName and the namespace URI nsURI. If the attribute does not exist defValue is returned.

Ver también:

setAttributeNS() attributeNodeNS() setAttributeNodeNS() attribute()

QDomNamedNodeMap QDomElement::attributes

(

)

const [virtual]

Returns a QDomNamedNodeMap containing all this element's attributes.

Ver también:

attribute() setAttribute() attributeNode() setAttributeNode()

Reimplementado de QDomNode.

QDomNamedNodeMap QDomElement::attributes

(

)

const [virtual]

Returns a named node map of all attributes. Attributes are only provided for {QDomElement}s.

Changing the attributes in the map will also change the attributes of this QDomNode.

Reimplementado de QDomNode.

virtual QDomNodeList QDomElement::elementsByTagName

(

const QString &

tagname

)

const [virtual]

QDomNodeList QDomElement::elementsByTagName

(

const QString &

tagname

)

const [virtual]

Returns a QDomNodeList containing all descendent elements of this element that are called tagname. The order they are in the node list is the order they are encountered in a preorder traversal of the element tree.

Ver también:

elementsByTagNameNS() QDomDocument::elementsByTagName()

QDomNodeList QDomElement::elementsByTagNameNS	(	const QString &	nsURI,
		const QString &	localName
	)		const [virtual]

Returns a QDomNodeList containing all the descendent elements of this element with the local name localName and the namespace URI nsURI. The order they are in the node list is the order they are encountered in a preorder traversal of the element tree.

Ver también:

elementsByTagName() QDomDocument::elementsByTagNameNS()

virtual QDomNodeList QDomElement::elementsByTagNameNS	(	const QString &	nsURI,
		const QString &	localName
	)		const [virtual]

bool QDomElement::hasAttribute

(

const QString &

name

)

const

bool QDomElement::hasAttribute

(

const QString &

name

)

const

Returns TRUE if this element has an attribute called name; otherwise returns FALSE.

bool QDomElement::hasAttributeNS	(	const QString &	nsURI,
		const QString &	localName
	)		const

Returns TRUE if this element has an attribute with the local name localName and the namespace URI nsURI; otherwise returns FALSE.

bool QDomElement::hasAttributeNS	(	const QString &	nsURI,
		const QString &	localName
	)		const

bool QDomElement::isElement

(

)

const [virtual]

Returns TRUE if the node is an element; otherwise returns FALSE.

If this function returns TRUE, it does not imply that this object is a QDomElement; you can get the QDomElement with toElement().

Ver también:

toElement()

Reimplementado de QDomNode.

bool QDomElement::isElement

(

)

const [virtual]

Returns TRUE.

Reimplementado de QDomNode.

QDomNode::NodeType QDomElement::nodeType

(

)

const [virtual]

Returns ElementNode.

Reimplementado de QDomNode.

QDomNode::NodeType QDomElement::nodeType

(

)

const [virtual]

Returns the type of the node.

Ver también:

toAttr(), toCDATASection(), toDocumentFragment(), toDocument() toDocumentType(), toElement(), toEntityReference(), toText(), toEntity() toNotation(), toProcessingInstruction(), toCharacterData(), toComment()

Reimplementado de QDomNode.

QDomElement& QDomElement::operator=

(

const QDomElement &

)

QDomElement & QDomElement::operator=

(

const QDomElement &

x

)

Assigns x to this DOM element.

The data of the copy is shared (shallow copy): modifying one node will also change the other. If you want to make a deep copy, use cloneNode().

void QDomElement::removeAttribute

(

const QString &

name

)

Removes the attribute called name name from this element.

Ver también:

setAttribute() attribute() removeAttributeNS()

void QDomElement::removeAttribute

(

const QString &

name

)

QDomAttr QDomElement::removeAttributeNode

(

const QDomAttr &

oldAttr

)

QDomAttr QDomElement::removeAttributeNode

(

const QDomAttr &

oldAttr

)

Removes the attribute oldAttr from the element and returns it.

Ver también:

attributeNode() setAttributeNode()

void QDomElement::removeAttributeNS	(	const QString &	nsURI,
		const QString &	localName
	)

Removes the attribute with the local name localName and the namespace URI nsURI from this element.

Ver también:

setAttributeNS() attributeNS() removeAttribute()

void QDomElement::removeAttributeNS	(	const QString &	nsURI,
		const QString &	localName
	)

void QDomElement::setAttribute	(	const QString &	name,
		uint	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		double	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttribute	(	const QString &	name,
		const QString &	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		int	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttribute	(	const QString &	name,
		int	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		long	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		ulong	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		uint	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttribute	(	const QString &	name,
		double	value
	)

void QDomElement::setAttribute	(	const QString &	name,
		long	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttribute	(	const QString &	name,
		const QString &	value
	)

Adds an attribute called name with value value. If an attribute with the same name exists, its value is replaced by value.

Ver también:

attribute() setAttributeNode() setAttributeNS()

void QDomElement::setAttribute	(	const QString &	name,
		ulong	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

QDomAttr QDomElement::setAttributeNode

(

const QDomAttr &

newAttr

)

QDomAttr QDomElement::setAttributeNode

(

const QDomAttr &

newAttr

)

Adds the attribute newAttr to this element.

If the element has another attribute that has the same name as newAttr, this function replaces that attribute and returns it; otherwise the function returns a null attribute.

Ver también:

attributeNode() setAttribute() setAttributeNodeNS()

QDomAttr QDomElement::setAttributeNodeNS

(

const QDomAttr &

newAttr

)

Adds the attribute newAttr to this element.

If the element has another attribute that has the same local name and namespace URI as newAttr, this function replaces that attribute and returns it; otherwise the function returns a null attribute.

Ver también:

attributeNodeNS() setAttributeNS() setAttributeNode()

QDomAttr QDomElement::setAttributeNodeNS

(

const QDomAttr &

newAttr

)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		double	value
	)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		const QString &	value
	)

Adds an attribute with the qualified name qName and the namespace URI nsURI with the value value. If an attribute with the same local name and namespace URI exists, its prefix is replaced by the prefix of qName and its value is repaced by value.

Although qName is the qualified name, the local name is used to decide if an existing attribute's value should be replaced.

Ver también:

attributeNS() setAttributeNodeNS() setAttribute()

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		double	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		int	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		const QString &	value
	)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		ulong	value
	)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		uint	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		int	value
	)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		ulong	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		long	value
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		long	value
	)

void QDomElement::setAttributeNS	(	const QString	nsURI,
		const QString &	qName,
		uint	value
	)

void QDomElement::setTagName

(

const QString &

name

)

Sets this element's tag name to name.

Ver también:

tagName()

void QDomElement::setTagName

(

const QString &

name

)

QString QDomElement::tagName

(

)

const

Returns the tag name of this element. For an XML element like this:

    <img src="myimg.png">

the tagname would return "img".

Ver también:

setTagName()

QString QDomElement::tagName

(

)

const

QString QDomElement::text

(

)

const

QString QDomElement::text

(

)

const

Returns the element's text or QString::null.

Example:

    <h1>Hello <b>Qt</b> <![CDATA[<xml is cool>]]></h1>

The function text() of the QDomElement for the <h1> tag, will return "Hello Qt &lt;xml is cool&gt;".

Comments are ignored by this function. It only evaluates QDomText and QDomCDATASection objects.

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Documentación de las funciones relacionadas y clases amigas

QDomAttr [friend]

QDomDocument [friend]

Reimplementado de QDomNode.

QDomNode [friend]

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qt/include/qdom.h
• src/qt/src/xml/qdom.h
• src/qt/src/xml/qdom.cpp