Detailed Description
The QDomAttr class represents one attribute of a QDomElement.
For example, the following piece of XML produces an element with
no children, but two attributes:
<link href="http://www.trolltech.com" color="red" />
You can access the attributes of an element with code like this:
QDomElement e = //...
//...
QDomAttr a = e.attributeNode( "href" );
cout << a.value() << endl; // prints "http://www.trolltech.com"
a.setValue( "http://doc.trolltech.com" ); // change the node's attribute
QDomAttr a2 = e.attributeNode( "href" );
cout << a2.value() << endl; // prints "http://doc.trolltech.com"
This example also shows that changing an attribute received from
an element changes the attribute of the element. If you do not
want to change the value of the element's attribute you must
use cloneNode() to get an independent copy of the attribute.
QDomAttr can return the name() and value() of an attribute. An
attribute's value is set with setValue(). If specified() returns
TRUE the value was either set in the document or set with
setValue(); otherwise the value hasn't been set. The node this
attribute is attached to (if any) is returned by ownerElement().
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.
See also XML.
Member Function Documentation
QDomAttr::QDomAttr ()
Constructs an empty attribute.
QDomAttr::QDomAttr ( const QDomAttr & 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().
QDomAttr::~QDomAttr ()
Destroys the object and frees its resources.
bool QDomAttr::isAttr () const [virtual]
Returns TRUE.
Reimplemented from QDomNode.
QString QDomAttr::name () const [virtual]
Returns the attribute's name.
QDomNode::NodeType QDomAttr::nodeType () const [virtual]
Returns AttributeNode.
Reimplemented from QDomNode.
QDomAttr & QDomAttr::operator= ( const QDomAttr & x )
Assigns x to this DOM attribute.
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 QDomAttr::ownerElement () const [virtual]
Returns the element node this attribute is attached to or a null node if this attribute is not
attached to any element.
void QDomAttr::setValue ( const QString & v ) [virtual]
Sets the attribute's value to v.
See also value().
bool QDomAttr::specified () const [virtual]
Returns TRUE if the attribute has either been expicitly specified
in the XML document or was set by the user with setValue().
Returns FALSE if the value hasn't been specified or set.
See also setValue().
QString QDomAttr::value () const [virtual]
Returns the value of the attribute or QString::null if the
attribute has not been specified.
See also specified() and setValue().
This file is part of the Qt toolkit.
Copyright © 1995-2002
Trolltech. All Rights Reserved.
