- Qt 5.15
- Qt XML Patterns
- C++ Classes
- QSimpleXmlNodeModel
- Qt 5.15.11 Reference Documentation

# QSimpleXmlNodeModel Class

The QSimpleXmlNodeModel class is an implementation of QAbstractXmlNodeModel sufficient for many common cases. More...

Header: | #include <QSimpleXmlNodeModel>
qmake: | QT += xmlpatterns
Since: | Qt 4.4
Inherits: | QAbstractXmlNodeModel

This class was introduced in Qt 4.4.

- List of all members, including inherited members

Note: All functions in this class are reentrant.

## Public Functions

| QSimpleXmlNodeModel(const QXmlNamePool &namePool)
virtual | ~QSimpleXmlNodeModel()
QXmlNamePool & | namePool() const

## Reimplemented Public Functions

virtual QUrl | baseUri(const QXmlNodeModelIndex &node) const override
virtual QXmlNodeModelIndex | elementById(const QXmlName &id) const override
virtual QVector<QXmlName> | namespaceBindings(const QXmlNodeModelIndex &node) const override
virtual QVector<QXmlNodeModelIndex> | nodesByIdref(const QXmlName &idref) const override
virtual QString | stringValue(const QXmlNodeModelIndex &node) const override

## Detailed Description

Subclassing QAbstractXmlNodeModel can be a significant task, because it requires implementing several, complex member functions. QSimpleXmlNodeModel provides default implementations of these member functions that are suitable for a wide range of node models.

Subclasses of QSimpleXmlNodeModel must be thread-safe.

## Member Function Documentation

### QSimpleXmlNodeModel::QSimpleXmlNodeModel(const QXmlNamePool &namePool)

Constructs a QSimpleXmlNodeModel for use with with the specified namePool.

### `[virtual]` QSimpleXmlNodeModel::~QSimpleXmlNodeModel()

Destructor.

### `[override virtual]` QUrl QSimpleXmlNodeModel::baseUri(const QXmlNodeModelIndex &node) const

Reimplements: QAbstractXmlNodeModel::baseUri(const QXmlNodeModelIndex &n) const.

Returns the base URI for node. This is always the document URI.

See also documentUri().

### `[override virtual]` QXmlNodeModelIndex QSimpleXmlNodeModel::elementById(const QXmlName &id) const

Reimplements: QAbstractXmlNodeModel::elementById(const QXmlName &id) const.

Always returns a default constructed QXmlNodeModelIndex instance, regardless of id.

This effectively means the model has no elements that have an id.

### QXmlNamePool &QSimpleXmlNodeModel::namePool() const

Returns the name pool associated with this model. The implementation of name() will use this name pool to create names.

### `[override virtual]` QVector<QXmlName> QSimpleXmlNodeModel::namespaceBindings(const QXmlNodeModelIndex &node) const

Reimplements: QAbstractXmlNodeModel::namespaceBindings(const QXmlNodeModelIndex &n) const.

Always returns an empty QVector. This signals that no namespace bindings are in scope for node.

### `[override virtual]` QVector<QXmlNodeModelIndex> QSimpleXmlNodeModel::nodesByIdref(const QXmlName &idref) const

Reimplements: QAbstractXmlNodeModel::nodesByIdref(const QXmlName &idref) const.

Always returns an empty vector, regardless of idref.

This effectively means the model has no elements or attributes of type `IDREF`.

### `[override virtual]` QString QSimpleXmlNodeModel::stringValue(const QXmlNodeModelIndex &node) const

Reimplements: QAbstractXmlNodeModel::stringValue(const QXmlNodeModelIndex &n) const.

If node is an element or attribute, typedValue() is called, and the return value converted to a string, as per XQuery's rules.

If node is another type of node, the empty string is returned.

If this function is overridden for comments or processing instructions, it is important to remember to call it (for elements and attributes having values not of type `xs:string`) to ensure that the values are formatted according to XQuery.