QItemSelectionRange Class

The QItemSelectionRange class manages information about a range of selected items in a model. More...

Header: #include <QItemSelectionRange>
qmake: QT += core

Public Functions

QModelIndexList indexes() const
bool isEmpty() const
bool operator<(const QItemSelectionRange &other) const

Detailed Description

A QItemSelectionRange contains information about a range of selected items in a model. A range of items is a contiguous array of model items, extending to cover a number of adjacent rows and columns with a common parent item; this can be visualized as a two-dimensional block of cells in a table. A selection range has a top(), left() a bottom(), right() and a parent().

The QItemSelectionRange class is one of the Model/View Classes and is part of Qt's model/view framework.

The model items contained in the selection range can be obtained using the indexes() function. Use QItemSelectionModel::selectedIndexes() to get a list of all selected items for a view.

You can determine whether a given model item lies within a particular range by using the contains() function. Ranges can also be compared using the overloaded operators for equality and inequality, and the intersects() function allows you to determine whether two ranges overlap.

See also Model/View Programming, QAbstractItemModel, QItemSelection, and QItemSelectionModel.

Member Function Documentation

QModelIndexList QItemSelectionRange::indexes() const

Returns the list of model index items stored in the selection.

bool QItemSelectionRange::isEmpty() const

Returns true if the selection range contains no selectable item

This function was introduced in Qt 4.7.

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

Returns true if the selection range is less than the other range given; otherwise returns false.

The less than calculation is not directly useful to developers - the way that ranges with different parents compare is not defined. This operator only exists so that the class can be used with QMap.