QAbstractTableModel Class Reference
[QtCore module]

Subclassing

Note: Some general guidelines for subclassing models are available in the Model Subclassing Reference.

When subclassing QAbstractTableModel, you must implement rowCount(), columnCount(), and data(). Default implementations of the index() and parent() functions are provided by QAbstractTableModel. Well behaved models will also implement headerData().

Editable models need to implement setData(), and implement flags() to return a value containing Qt::ItemIsEditable.

Models that provide interfaces to resizable data structures can provide implementations of insertRows(), removeRows(), insertColumns(), and removeColumns(). When implementing these functions, it is important to call the appropriate functions so that all connected views are aware of any changes:

• An insertRows() implementation must call beginInsertRows() before inserting new rows into the data structure, and it must call endInsertRows() immediately afterwards.
• An insertColumns() implementation must call beginInsertColumns() before inserting new columns into the data structure, and it must call endInsertColumns() immediately afterwards.
• A removeRows() implementation must call beginRemoveRows() before the rows are removed from the data structure, and it must call endRemoveRows() immediately afterwards.
• A removeColumns() implementation must call beginRemoveColumns() before the columns are removed from the data structure, and it must call endRemoveColumns() immediately afterwards.

See also Model Classes, Model Subclassing Reference, QAbstractItemModel, QAbstractListModel, and Pixelator Example.

Member Function Documentation

QAbstractTableModel::QAbstractTableModel ( QObject * parent = 0 )

Constructs an abstract table model for the given parent.

QAbstractTableModel::~QAbstractTableModel ()

Destroys the abstract table model.

QModelIndex QAbstractTableModel::index ( int row, int column, const QModelIndex & parent = QModelIndex() ) const   [virtual]

Returns the index of the data in row and column with parent.

Reimplemented from QAbstractItemModel.

See also parent().