QModelIndex#

The QModelIndex class is used to locate data in a data model. More…

Synopsis#

Functions#

def column ()
def constInternalPointer ()
def data ([role=Qt.DisplayRole])
def flags ()
def internalId ()
def internalPointer ()
def isValid ()
def model ()
def __ne__ (other)
def __lt__ (other)
def __eq__ (other)
def parent ()
def row ()
def sibling (row, column)
def siblingAtColumn (column)
def siblingAtRow (row)

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description#

This class is used as an index into item models derived from QAbstractItemModel . The index is used by item views, delegates, and selection models to locate an item in the model.

New QModelIndex objects are created by the model using the createIndex() function. An invalid model index can be constructed with the QModelIndex constructor. Invalid indexes are often used as parent indexes when referring to top-level items in a model.

Model indexes refer to items in models, and contain all the information required to specify their locations in those models. Each index is located in a given row and column, and may have a parent index; use row() , column() , and parent() to obtain this information. Each top-level item in a model is represented by a model index that does not have a parent index - in this case, parent() will return an invalid model index, equivalent to an index constructed with the zero argument form of the QModelIndex() constructor.

To obtain a model index that refers to an existing item in a model, call index() with the required row and column values, and the model index of the parent. When referring to top-level items in a model, supply QModelIndex() as the parent index.

The model() function returns the model that the index references as a QAbstractItemModel . The child() function is used to examine items held under the index in the model. The sibling() function allows you to traverse items in the model on the same level as the index.

Note

Model indexes should be used immediately and then discarded. You should not rely on indexes to remain valid after calling model functions that change the structure of the model or delete items. If you need to keep a model index over time use a QPersistentModelIndex .