Home | All Classes | Main Classes | Annotated | Grouped Classes | Functions | ![]() |
The QModelIndex class is used to locate data in a data model. More...
#include <QModelIndex>
The QModelIndex class is used to locate data in a data model.
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. QModelIndex objects are created by the model.
An invalid model index can be constructed with the zero argument form of the QModelIndex() constructor. This is useful when referring to top-level items in a model.
Model indexes can become invalid over time so they should be used immediately and then discarded. If you need to keep a model index over time use a QPersistentModelIndex.
A model index has a parent(), a row(), and a column(). The parent refers to the model containing the item that corresponds to the model index.
See also Model/View Programming, QPersistentModelIndex, and QAbstractItemModel.
Creates a new model index that is a copy of the other model index.
Destroys the model index.
Returns the column this model index refers to.
Returns true if this model index is valid; otherwise returns false.
Return the parent of the model index or QModelIndex() if it has no parent.
Returns the row this model index refers to.
Returns true if this model index does not refer to the same location as the other model index; otherwise returns false.
Returns true if this model index refers to the same location as the other model index; otherwise returns false.
Copyright © 2004 Trolltech | Trademarks | Qt 4.0.0-b1 |