QItemSelectionModel Class

成员函数

QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model = Q_NULLPTR)

Constructs a selection model that operates on the specified item model.

QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model, QObject *parent)

Constructs a selection model that operates on the specified item model with parent.

[virtual] QItemSelectionModel::~QItemSelectionModel()

Destroys the selection model.

[virtual slot] void QItemSelectionModel::clear()

Clears the selection model. Emits selectionChanged() and currentChanged().

[virtual slot] void QItemSelectionModel::clearCurrentIndex()

Clears the current index. Emits currentChanged().

[slot] void QItemSelectionModel::clearSelection()

Clears the selection in the selection model. Emits selectionChanged().

This function was introduced in Qt 4.2.

bool QItemSelectionModel::columnIntersectsSelection(int column, const QModelIndex &parent) const

Returns true if there are any items selected in the column with the given parent.

[signal] void QItemSelectionModel::currentChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted whenever the current item changes. The previous model item index is replaced by the current index as the selection's current item.

Note that this signal will not be emitted when the item model is reset.

参见 currentIndex(), setCurrentIndex(), and selectionChanged().

[signal] void QItemSelectionModel::currentColumnChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted if the current item changes and its column is different to the column of the previous current item.

Note that this signal will not be emitted when the item model is reset.

参见 currentChanged(), currentRowChanged(), currentIndex(), and setCurrentIndex().

QModelIndex QItemSelectionModel::currentIndex() const

Returns the model item index for the current item, or an invalid index if there is no current item.

参见 setCurrentIndex().

[signal] void QItemSelectionModel::currentRowChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted if the current item changes and its row is different to the row of the previous current item.

Note that this signal will not be emitted when the item model is reset.

参见 currentChanged(), currentColumnChanged(), currentIndex(), and setCurrentIndex().

[protected] void QItemSelectionModel::emitSelectionChanged(const QItemSelection &newSelection, const QItemSelection &oldSelection)

Compares the two selections newSelection and oldSelection and emits selectionChanged() with the deselected and selected items.

bool QItemSelectionModel::hasSelection() const

Returns true if the selection model contains any selection ranges; otherwise returns false.

This function was introduced in Qt 4.2.

bool QItemSelectionModel::isColumnSelected(int column, const QModelIndex &parent) const

Returns true if all items are selected in the column with the given parent.

Note that this function is usually faster than calling isSelected() on all items in the same column and that unselectable items are ignored.

bool QItemSelectionModel::isRowSelected(int row, const QModelIndex &parent) const

Returns true if all items are selected in the row with the given parent.

Note that this function is usually faster than calling isSelected() on all items in the same row and that unselectable items are ignored.

bool QItemSelectionModel::isSelected(const QModelIndex &index) const

Returns true if the given model item index is selected.

const QAbstractItemModel *QItemSelectionModel::model() const

Returns the item model operated on by the selection model.

参见 setModel().

QAbstractItemModel *QItemSelectionModel::model()

Returns the item model operated on by the selection model.

This function was introduced in Qt 5.5.

[signal] void QItemSelectionModel::modelChanged(QAbstractItemModel *model)

This signal is emitted when the model is successfully set with setModel().

This function was introduced in Qt 5.5.

参见 model() and setModel().

[virtual slot] void QItemSelectionModel::reset()

Clears the selection model. Does not emit any signals.

bool QItemSelectionModel::rowIntersectsSelection(int row, const QModelIndex &parent) const

Returns true if there are any items selected in the row with the given parent.

[virtual slot] void QItemSelectionModel::select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)

Selects the model item index using the specified command, and emits selectionChanged().

参见 QItemSelectionModel::SelectionFlags.

[virtual slot] void QItemSelectionModel::select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command)

Selects the item selection using the specified command, and emits selectionChanged().

参见 QItemSelectionModel::SelectionFlag.

QModelIndexList QItemSelectionModel::selectedColumns(int row = 0) const

Returns the indexes in the given row for columns where all rows are selected.

This function was introduced in Qt 4.2.

参见 selectedIndexes() and selectedRows().

QModelIndexList QItemSelectionModel::selectedIndexes() const

Returns a list of all selected model item indexes. The list contains no duplicates, and is not sorted.

Note: Getter function for property selectedIndexes.

QModelIndexList QItemSelectionModel::selectedRows(int column = 0) const

Returns the indexes in the given column for the rows where all columns are selected.

This function was introduced in Qt 4.2.

参见 selectedIndexes() and selectedColumns().

const QItemSelection QItemSelectionModel::selection() const

Returns the selection ranges stored in the selection model.

[signal] void QItemSelectionModel::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)

This signal is emitted whenever the selection changes. The change in the selection is represented as an item selection of deselected items and an item selection of selected items.

Note the that the current index changes independently from the selection. Also note that this signal will not be emitted when the item model is reset.

Note: Notifier signal for property selectedIndexes.

参见 select() and currentChanged().

[virtual slot] void QItemSelectionModel::setCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)

Sets the model item index to be the current item, and emits currentChanged(). The current item is used for keyboard navigation and focus indication; it is independent of any selected items, although a selected item can also be the current item.

Depending on the specified command, the index can also become part of the current selection.

参见 currentIndex() and select().

void QItemSelectionModel::setModel(QAbstractItemModel *model)

Sets the model to model. The modelChanged() signal will be emitted.

This function was introduced in Qt 5.5.

参见 model() and modelChanged().