CopperSpice API  1.7.2
QDomElement Class Reference

The QDomElement class represents one element in the DOM tree. More...

Inheritance diagram for QDomElement:
QDomNode

Public Methods

 QDomElement ()
 
 QDomElement (const QDomElement &other)
 
QString attribute (const QString &name, const QString &defValue=QString ()) const
 
QDomAttr attributeNode (const QString &name)
 
QDomAttr attributeNodeNS (const QString &nsURI, const QString &localName)
 
QString attributeNS (const QString nsURI, const QString &localName, const QString &defValue=QString ()) const
 
QDomNamedNodeMap attributes () const
 
QDomNodeList elementsByTagName (const QString &tagname) const
 
QDomNodeList elementsByTagNameNS (const QString &nsURI, const QString &localName) const
 
bool hasAttribute (const QString &name) const
 
bool hasAttributeNS (const QString &nsURI, const QString &localName) const
 
QDomNode::NodeType nodeType () const
 
QDomElement & operator= (const QDomElement &other)
 
void removeAttribute (const QString &name)
 
QDomAttr removeAttributeNode (const QDomAttr &oldAttr)
 
void removeAttributeNS (const QString &nsURI, const QString &localName)
 
void setAttribute (const QString &name, const QString &value)
 
void setAttribute (const QString &name, double value)
 
void setAttribute (const QString &name, float value)
 
void setAttribute (const QString &name, int value)
 
void setAttribute (const QString &name, qint64 value)
 
void setAttribute (const QString &name, quint64 value)
 
void setAttribute (const QString &name, uint value)
 
QDomAttr setAttributeNode (const QDomAttr &newAttr)
 
QDomAttr setAttributeNodeNS (const QDomAttr &newAttr)
 
void setAttributeNS (const QString nsURI, const QString &qName, const QString &value)
 
void setAttributeNS (const QString nsURI, const QString &qName, double value)
 
void setAttributeNS (const QString nsURI, const QString &qName, int value)
 
void setAttributeNS (const QString nsURI, const QString &qName, qint64 value)
 
void setAttributeNS (const QString nsURI, const QString &qName, quint64 value)
 
void setAttributeNS (const QString nsURI, const QString &qName, uint value)
 
void setTagName (const QString &name)
 
QString tagName () const
 
QString text () const
 
- Public Methods inherited from QDomNode
 QDomNode ()
 
 QDomNode (const QDomNode &other)
 
 ~QDomNode ()
 
QDomNode appendChild (const QDomNode &newChild)
 
QDomNamedNodeMap attributes () const
 
QDomNodeList childNodes () const
 
void clear ()
 
QDomNode cloneNode (bool deep=true) const
 
int columnNumber () const
 
QDomNode firstChild () const
 
QDomElement firstChildElement (const QString &tagName=QString ()) const
 
bool hasAttributes () const
 
bool hasChildNodes () const
 
QDomNode insertAfter (const QDomNode &newChild, const QDomNode &refChild)
 
QDomNode insertBefore (const QDomNode &newChild, const QDomNode &refChild)
 
bool isAttr () const
 
bool isCDATASection () const
 
bool isCharacterData () const
 
bool isComment () const
 
bool isDocument () const
 
bool isDocumentFragment () const
 
bool isDocumentType () const
 
bool isElement () const
 
bool isEntity () const
 
bool isEntityReference () const
 
bool isNotation () const
 
bool isNull () const
 
bool isProcessingInstruction () const
 
bool isSupported (const QString &feature, const QString &version) const
 
bool isText () const
 
QDomNode lastChild () const
 
QDomElement lastChildElement (const QString &tagName=QString ()) const
 
int lineNumber () const
 
QString localName () const
 
QDomNode namedItem (const QString &name) const
 
QString namespaceURI () const
 
QDomNode nextSibling () const
 
QDomElement nextSiblingElement (const QString &tagName=QString ()) const
 
QString nodeName () const
 
NodeType nodeType () const
 
QString nodeValue () const
 
void normalize ()
 
bool operator!= (const QDomNode &n) const
 
QDomNode & operator= (const QDomNode &other)
 
bool operator== (const QDomNode &n) const
 
QDomDocument ownerDocument () const
 
QDomNode parentNode () const
 
QString prefix () const
 
QDomNode previousSibling () const
 
QDomElement previousSiblingElement (const QString &tagName=QString ()) const
 
QDomNode removeChild (const QDomNode &oldChild)
 
QDomNode replaceChild (const QDomNode &newChild, const QDomNode &oldChild)
 
void save (QTextStream &stream, int indent, QDomNode::EncodingPolicy policy=QDomNode::EncodingFromDocument) const
 
void setNodeValue (const QString &value)
 
void setPrefix (const QString &prefix)
 
QDomAttr toAttr () const
 
QDomCDATASection toCDATASection () const
 
QDomCharacterData toCharacterData () const
 
QDomComment toComment () const
 
QDomDocument toDocument () const
 
QDomDocumentFragment toDocumentFragment () const
 
QDomDocumentType toDocumentType () const
 
QDomElement toElement () const
 
QDomEntity toEntity () const
 
QDomEntityReference toEntityReference () const
 
QDomNotation toNotation () const
 
QDomProcessingInstruction toProcessingInstruction () const
 
QDomText toText () const
 

Friends

class QDomAttr
 
class QDomDocument
 
class QDomNode
 

Additional Inherited Members

- Public Types inherited from QDomNode
enum  EncodingPolicy
 
enum  NodeType
 

Detailed Description

The QDomElement class represents one element in the DOM tree.

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.

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 descendants of an element which have a specified tag name with elementsByTagName() or elementsByTagNameNS().

To browse the elements of a dom document use firstChildElement(), lastChildElement(), nextSiblingElement() and previousSiblingElement(). For example, to iterate over all child elements called "entry" in a root element called "database", you can use:

QDomDocument doc = // ...
QDomElement root = doc.firstChildElement("database");
QDomElement elt = root.firstChildElement("entry");
for (; !elt.isNull(); elt = elt.nextSiblingElement("entry")) {
// ...
}

For further information about the Document Object Model see Level 1 and Level 2 Core. For a more general introduction of the DOM implementation see the QDomDocument documentation.

See also
setAttribute(), attributeNode(), setAttributeNode(), attributeNS()

Constructor & Destructor Documentation

QDomElement::QDomElement ( )

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

QDomElement::QDomElement ( const QDomElement &  other)

Copy constructs a new QDomElement from other.

Method Documentation

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

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

See also
setAttribute(), attributeNode(), setAttributeNode(), attributeNS()
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.

See also
setAttributeNode(), attribute(), setAttribute(), attributeNodeNS()
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.

See also
setAttributeNodeNS(), setAttributeNode(), attribute(), setAttribute()
QString QDomElement::attributeNS ( const QString  nsURI,
const QString localName,
const QString defValue = QString() 
) const

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

See also
setAttributeNS(), attributeNodeNS(), setAttributeNodeNS(), attribute()
QDomNamedNodeMap QDomElement::attributes ( ) const

Returns a QDomNamedNodeMap containing all this element's attributes.

See also
attribute(), setAttribute(), attributeNode(), setAttributeNode()
QDomNodeList QDomElement::elementsByTagName ( const QString tagname) const

Returns a QDomNodeList containing all descendants of this element named tagname encountered during a preorder traversal of the element subtree with this element as its root. The order of the elements in the returned list is the order they are encountered during the preorder traversal.

See also
elementsByTagNameNS(), QDomDocument::elementsByTagName()
QDomNodeList QDomElement::elementsByTagNameNS ( const QString nsURI,
const QString localName 
) const

Returns a QDomNodeList containing all descendants of this element with local name localName and namespace URI nsURI encountered during a preorder traversal of the element subtree with this element as its root. The order of the elements in the returned list is the order they are encountered during the preorder traversal.

See also
elementsByTagName(), QDomDocument::elementsByTagNameNS()
bool QDomElement::hasAttribute ( const QString name) const

Returns true if this element has an attribute called name, otherwise returns false.

Note
This function does not take the presence of namespaces into account. As a result, the specified name will be tested against fully-qualified attribute names that include any namespace prefixes that may be present.

Use hasAttributeNS() to explicitly test for attributes with specific namespaces and names.

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.

QDomNode::NodeType QDomElement::nodeType ( ) const
inline

Returns ElementNode.

QDomElement & QDomElement::operator= ( const QDomElement &  other)

Copy assigns from other and returns a reference to this object.

void QDomElement::removeAttribute ( const QString name)

Removes the attribute called name name from this element.

See also
setAttribute(), attribute(), removeAttributeNS()
QDomAttr QDomElement::removeAttributeNode ( const QDomAttr oldAttr)

Removes the attribute oldAttr from the element and returns it.

See also
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.

See also
setAttributeNS(), attributeNS(), removeAttribute()
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.

See also
attribute(), setAttributeNode(), setAttributeNS()
void QDomElement::setAttribute ( const QString name,
double  value 
)

The number is formatted according to the current locale.

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

The number is formatted according to the current locale.

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

The number is formatted according to the current locale.

void QDomElement::setAttribute ( const QString name,
qint64  value 
)

The number is formatted according to the current locale.

void QDomElement::setAttribute ( const QString name,
quint64  value 
)

The number is formatted according to the current locale.

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

The number is formatted according to the current locale.

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.

See also
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.

See also
attributeNodeNS(), setAttributeNS(), setAttributeNode()
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 replaced by value.

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

See also
attributeNS(), setAttributeNodeNS(), setAttribute()
void QDomElement::setAttributeNS ( const QString  nsURI,
const QString qName,
double  value 
)

This is an overloaded function.

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

This is an overloaded function.

void QDomElement::setAttributeNS ( const QString  nsURI,
const QString qName,
qint64  value 
)

This is an overloaded function.

void QDomElement::setAttributeNS ( const QString  nsURI,
const QString qName,
quint64  value 
)

This is an overloaded function.

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

This is an overloaded function.

void QDomElement::setTagName ( const QString name)

Sets this element's tag name to name.

See also
tagName()
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".

See also
setTagName()
QString QDomElement::text ( ) const

Returns the element's text or an empty string.

Example:

<h1>Hello <b>CopperSpice</b> <![CDATA[<xml is useful>]]></h1>

The function text() of the QDomElement for the <h1> tag, will return the following text:

Hello CopperSpice<xml is useful>

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