QAbstractTableModelclass provides an abstract model that can be subclassed to create table models. 更多 …
继承者： QSqlQueryModel , QSqlRelationalTableModel , QSqlTableModel
QAbstractTableModelprovides a standard interface for models that represent their data as a two-dimensional array of items. It is not used directly, but must be subclassed.Since the model provides a more specialized interface than
QAbstractItemModel, it is not suitable for use with tree views, although it can be used to provide data to aQListView. If you need to represent a simple list of items, and only need a model to contain a single column of data, subclassing theQAbstractListModelmay be more appropriate.
rowCount()andcolumnCount()functions return the dimensions of the table. To retrieve a model index corresponding to an item in the model, useindex()and provide only the row and column numbers.
当子类化
QAbstractTableModel, you must implementrowCount(),columnCount()，和data(). Default implementations of theindex()andparent()functions are provided byQAbstractTableModel. Well behaved models will also implementheaderData().Editable models need to implement
setData(), and implementflags()to return a value containingItemIsEditable.Models that provide interfaces to resizable data structures can provide implementations of
insertRows(),removeRows(),insertColumns()，和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 callbeginInsertRows()before inserting new rows into the data structure, and it must callendInsertRows()immediately afterwards .An
insertColumns()implementation must callbeginInsertColumns()before inserting new columns into the data structure, and it must callendInsertColumns()immediately afterwards .A
removeRows()implementation must callbeginRemoveRows()before the rows are removed from the data structure, and it must callendRemoveRows()immediately afterwards .A
removeColumns()implementation must callbeginRemoveColumns()before the columns are removed from the data structure, and it must callendRemoveColumns()immediately afterwards .注意
Some general guidelines for subclassing models are available in the 模型子类化参考 .
