QModelIndex Class Reference

Member Function Documentation

QModelIndex::QModelIndex ()

Creates a new empty model index. This type of model index is used to indicate that the position in the model is invalid.

See also isValid() and QAbstractItemModel.

QModelIndex::QModelIndex ( const QModelIndex & other )

Creates a new model index that is a copy of the other model index.

QModelIndex::~QModelIndex ()

Destroys the model index.

QModelIndex QModelIndex::child ( int row, int column ) const

Returns the child of the model index that is stored in the given row and column.

Note: This function does not work for an invalid model index which is often used as the root index.

See also parent() and sibling().

int QModelIndex::column () const

Returns the column this model index refers to.

QVariant QModelIndex::data ( int role = Qt::DisplayRole ) const

Returns the data for the given role for the item referred to by the index.

Qt::ItemFlags QModelIndex::flags () const

Returns the flags for the item referred to by the index.

This function was introduced in Qt 4.2.

qint64 QModelIndex::internalId () const

Returns a qint64 used by the model to associate the index with the internal data structure.

See also QAbstractItemModel::createIndex().

void * QModelIndex::internalPointer () const

Returns a void * pointer used by the model to associate the index with the internal data structure.

See also QAbstractItemModel::createIndex().

bool QModelIndex::isValid () const

Returns true if this model index is valid; otherwise returns false.

A valid index belongs to a model, and has non-negative row and column numbers.

See also model(), row(), and column().

const QAbstractItemModel * QModelIndex::model () const

Returns a pointer to the model containing the item that this index refers to.

A const pointer to the model is returned because calls to non-const functions of the model might invalidate the model index and possibly crash your application.

QModelIndex QModelIndex::parent () const

Returns the parent of the model index, or QModelIndex() if it has no parent.

See also child(), sibling(), and model().

int QModelIndex::row () const

Returns the row this model index refers to.

QModelIndex QModelIndex::sibling ( int row, int column ) const

Returns the sibling at row and column. If there is no sibling at this position, an invalid QModelIndex is returned.

See also parent() and child().

bool QModelIndex::operator!= ( const QModelIndex & other ) const

Returns true if this model index does not refer to the same location as the other model index; otherwise returns false.

bool QModelIndex::operator< ( const QModelIndex & other ) const

Returns true if this model index is smaller than the other model index; otherwise returns false.

This function was introduced in Qt 4.1.

bool QModelIndex::operator== ( const QModelIndex & other ) const

Returns true if this model index refers to the same location as the other model index; otherwise returns false.

All values in the model index are used when comparing with another model index.