\inmodule QtCore More...

#include <qabstractitemmodel.h>

Collaboration diagram for QPersistentModelIndex:

Public Member Functions
	QPersistentModelIndex ()

	QPersistentModelIndex (const QModelIndex &index)
	Creates a new QPersistentModelIndex that is a copy of the model index.

	QPersistentModelIndex (const QPersistentModelIndex &other)
	Creates a new QPersistentModelIndex that is a copy of the other persistent model index.

	~QPersistentModelIndex ()

bool	operator< (const QPersistentModelIndex &other) const

bool	operator== (const QPersistentModelIndex &other) const
	Returns {true} if this persistent model index is equal to the other persistent model index; otherwise returns {false}.

bool	operator!= (const QPersistentModelIndex &other) const

QPersistentModelIndex &	operator= (const QPersistentModelIndex &other)
	Sets the persistent model index to refer to the same item in a model as the other persistent model index.

	QPersistentModelIndex (QPersistentModelIndex &&other) noexcept
	Move-constructs a QPersistentModelIndex instance, making it point at the same object that other was pointing to.

void	swap (QPersistentModelIndex &other) noexcept

bool	operator== (const QModelIndex &other) const
	Returns {true} if this persistent model index refers to the same location as the other model index; otherwise returns {false}.

bool	operator!= (const QModelIndex &other) const
	Returns {true} if this persistent model index does not refer to the same location as the other model index; otherwise returns {false}.

QPersistentModelIndex &	operator= (const QModelIndex &other)
	Sets the persistent model index to refer to the same item in a model as the other model index.

	operator QModelIndex () const
	Cast operator that returns a QModelIndex.

int	row () const
	Returns the row this persistent model index refers to.

int	column () const
	Returns the column this persistent model index refers to.

void *	internalPointer () const

const void *	constInternalPointer () const

quintptr	internalId () const

QModelIndex	parent () const
	Returns the parent QModelIndex for this persistent index, or an invalid QModelIndex if it has no parent.

QModelIndex	sibling (int row, int column) const
	Returns the sibling at row and column or an invalid QModelIndex if there is no sibling at this position.

QVariant	data (int role=Qt::DisplayRole) const
	Returns the data for the given role for the item referred to by the index.

void	multiData (QModelRoleDataSpan roleDataSpan) const
	Populates the given roleDataSpan for the item referred to by the index.

Qt::ItemFlags	flags () const

const QAbstractItemModel *	model () const
	Returns the model that the index belongs to.

bool	isValid () const
	Returns {true} if this persistent model index is valid; otherwise returns {false}.

Friends
size_t	qHash (const QPersistentModelIndex &, size_t seed) noexcept

bool	qHashEquals (const QPersistentModelIndex &a, const QPersistentModelIndex &b) noexcept

Q_CORE_EXPORT QDebug	operator<< (QDebug, const QPersistentModelIndex &)

Related Symbols
(Note that these are not member symbols.)
size_t	qHash (const QPersistentModelIndex &index, size_t seed=0)

Detailed Description

\inmodule QtCore

The QPersistentModelIndex class is used to locate data in a data model.

A QPersistentModelIndex is a model index that can be stored by an application, and later used to access information in a model. Unlike the QModelIndex class, it is safe to store a QPersistentModelIndex since the model will ensure that references to items will continue to be valid as long as they can be accessed by the model.

It is good practice to check that persistent model indexes are valid before using them.

Note: You cannot store a QStandardItemModel's QPersistentModelIndex in one of the model's items.

See also: {Model/View Programming}, QModelIndex, QAbstractItemModel

Definition at line 174 of file qabstractitemmodel.h.

Constructor & Destructor Documentation

◆ QPersistentModelIndex() [1/4]

QPersistentModelIndex::QPersistentModelIndex ( )

Definition at line 330 of file qabstractitemmodel.cpp.

◆ QPersistentModelIndex() [2/4]

QPersistentModelIndex::QPersistentModelIndex ( const QModelIndex & index )

Creates a new QPersistentModelIndex that is a copy of the model index.

Definition at line 352 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::create(), QPersistentModelIndexData::ref, and QBasicAtomicInteger< T >::ref().

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◆ QPersistentModelIndex() [3/4]

QPersistentModelIndex::QPersistentModelIndex ( const QPersistentModelIndex & other )

Creates a new QPersistentModelIndex that is a copy of the other persistent model index.

Definition at line 342 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::ref, and QBasicAtomicInteger< T >::ref().

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◆ ~QPersistentModelIndex()

QPersistentModelIndex::~QPersistentModelIndex ( )

Definition at line 367 of file qabstractitemmodel.cpp.

References QBasicAtomicInteger< T >::deref(), QPersistentModelIndexData::destroy(), and QPersistentModelIndexData::ref.

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◆ QPersistentModelIndex() [4/4]

QPersistentModelIndex::QPersistentModelIndex ( QPersistentModelIndex && other )

inlinenoexcept

Move-constructs a QPersistentModelIndex instance, making it point at the same object that other was pointing to.

Since: 5.2

Definition at line 186 of file qabstractitemmodel.h.

Member Function Documentation

◆ column()

int QPersistentModelIndex::column ( ) const

Returns the column this persistent model index refers to.

Definition at line 518 of file qabstractitemmodel.cpp.

References QModelIndex::column(), and QPersistentModelIndexData::index.

Referenced by QItemSelectionModelPrivate::_q_columnsAboutToBeRemoved(), QItemSelectionModelPrivate::_q_rowsAboutToBeRemoved(), QDataWidgetMapperPrivate::currentIdx(), mergeIndexes(), mergeRowLengths(), QTableViewPrivate::selectColumn(), and QItemSelectionModel::setCurrentIndex().

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◆ constInternalPointer()

const void * QPersistentModelIndex::constInternalPointer ( ) const

Since: 6.0

Returns a {const void} {*} pointer used by the model to associate the index with the internal data structure.

Definition at line 550 of file qabstractitemmodel.cpp.

References QModelIndex::constInternalPointer(), and QPersistentModelIndexData::index.

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◆ data()

QVariant QPersistentModelIndex::data ( int role = Qt::DisplayRole ) const

Returns the data for the given role for the item referred to by the index.

See also: Qt::ItemDataRole, QAbstractItemModel::setData()

Definition at line 606 of file qabstractitemmodel.cpp.

References QModelIndex::data(), and QPersistentModelIndexData::index.

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◆ flags()

Qt::ItemFlags QPersistentModelIndex::flags ( ) const

Since: 4.2

Returns the flags for the item referred to by the index.

Definition at line 632 of file qabstractitemmodel.cpp.

References QModelIndex::flags(), and QPersistentModelIndexData::index.

Referenced by QTreeView::collapseAll(), and QTreeView::expandToDepth().

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◆ internalId()

quintptr QPersistentModelIndex::internalId ( ) const

Returns a {quintptr} used by the model to associate the index with the internal data structure.

Definition at line 566 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::internalId().

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◆ internalPointer()

void * QPersistentModelIndex::internalPointer ( ) const

Returns a {void} {*} pointer used by the model to associate the index with the internal data structure.

Definition at line 534 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::internalPointer().

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◆ isValid()

bool QPersistentModelIndex::isValid ( ) const

Returns {true} if this persistent model index is valid; otherwise returns {false}.

A valid index belongs to a model, and has non-negative row and column numbers.

See also: model(), row(), column()

Definition at line 661 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::isValid().

Referenced by QItemSelectionModelPrivate::_q_columnsAboutToBeRemoved(), QListWidgetPrivate::_q_emitCurrentItemChanged(), QComboBoxPrivate::_q_returnPressed(), QItemSelectionModelPrivate::_q_rowsAboutToBeRemoved(), QComboBoxPrivate::_q_rowsInserted(), QComboBoxPrivate::_q_rowsRemoved(), QConcatenateTablesProxyModelPrivate::_q_slotSourceLayoutAboutToBeChanged(), QIdentityProxyModelPrivate::_q_sourceLayoutAboutToBeChanged(), QTreeView::collapseAll(), QQuickTableViewPrivate::columnsRemovedCallback(), QAbstractItemView::edit(), QQuickTableViewPrivate::editFromKeyEvent(), QTreeView::expandToDepth(), QAbstractItemView::keyPressEvent(), mergeIndexes(), mergeRowLengths(), QTreeView::mouseDoubleClickEvent(), QQuickTableViewPrivate::processLoadRequest(), QQuickTableViewPrivate::processRebuildTable(), QQuickTableViewPrivate::rowsRemovedCallback(), and QQmlTreeModelToTableModel::setModel().

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◆ model()

const QAbstractItemModel * QPersistentModelIndex::model ( ) const

Returns the model that the index belongs to.

Definition at line 642 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::model().

Referenced by QQmlTreeModelToTableModel::setModel().

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◆ multiData()

void QPersistentModelIndex::multiData ( QModelRoleDataSpan roleDataSpan ) const

Populates the given roleDataSpan for the item referred to by the index.

Since: 6.0

See also: Qt::ItemDataRole, QAbstractItemModel::setData()

Definition at line 621 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::multiData().

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◆ operator QModelIndex()

QPersistentModelIndex::operator QModelIndex ( ) const

Cast operator that returns a QModelIndex.

Definition at line 463 of file qabstractitemmodel.cpp.

References d.

◆ operator!=() [1/2]

bool QPersistentModelIndex::operator!= ( const QModelIndex & other ) const

Returns {true} if this persistent model index does not refer to the same location as the other model index; otherwise returns {false}.

Definition at line 492 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and other().

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◆ operator!=() [2/2]

bool QPersistentModelIndex::operator!= ( const QPersistentModelIndex & other ) const

inline

Since: 4.2

Returns {true} if this persistent model index is not equal to the other persistent model index; otherwise returns {false}.

Definition at line 183 of file qabstractitemmodel.h.

References operator==(), and other().

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◆ operator<()

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

Since: 4.1

Returns {true} if this persistent model index is smaller than the other persistent model index; otherwise returns {false}.

The internal data pointer, row, column, and model values in the persistent model index are used when comparing with another persistent model index.

Definition at line 400 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and other().

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◆ operator=() [1/2]

QPersistentModelIndex & QPersistentModelIndex::operator= ( const QModelIndex & other )

Sets the persistent model index to refer to the same item in a model as the other model index.

Definition at line 444 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::create(), QBasicAtomicInteger< T >::deref(), QPersistentModelIndexData::destroy(), other(), QPersistentModelIndexData::ref, and QBasicAtomicInteger< T >::ref().

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◆ operator=() [2/2]

QPersistentModelIndex & QPersistentModelIndex::operator= ( const QPersistentModelIndex & other )

Sets the persistent model index to refer to the same item in a model as the other persistent model index.

Definition at line 421 of file qabstractitemmodel.cpp.

References QBasicAtomicInteger< T >::deref(), QPersistentModelIndexData::destroy(), other(), QPersistentModelIndexData::ref, and QBasicAtomicInteger< T >::ref().

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◆ operator==() [1/2]

bool QPersistentModelIndex::operator== ( const QModelIndex & other ) const

Returns {true} if this persistent model index refers to the same location as the other model index; otherwise returns {false}.

The internal data pointer, row, column, and model values in the persistent model index are used when comparing with another model index.

Definition at line 478 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and other().

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◆ operator==() [2/2]

bool QPersistentModelIndex::operator== ( const QPersistentModelIndex & other ) const

Returns {true} if this persistent model index is equal to the other persistent model index; otherwise returns {false}.

The internal data pointer, row, column, and model values in the persistent model index are used when comparing with another persistent model index.

Definition at line 383 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and other().

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◆ parent()

QModelIndex QPersistentModelIndex::parent ( ) const

Returns the parent QModelIndex for this persistent index, or an invalid QModelIndex if it has no parent.

See also: sibling(), model()

Definition at line 579 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::parent().

Referenced by QItemSelectionModelPrivate::_q_columnsAboutToBeRemoved(), QItemSelectionModelPrivate::_q_rowsAboutToBeRemoved(), mergeIndexes(), mergeRowLengths(), qt_PersistentModelIndexLessThan(), QItemSelectionModel::setCurrentIndex(), and QSortFilterProxyModelPrivate::update_persistent_indexes().

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◆ row()

int QPersistentModelIndex::row ( ) const

Returns the row this persistent model index refers to.

Definition at line 505 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::row().

Referenced by QItemSelectionModelPrivate::_q_columnsAboutToBeRemoved(), QComboBoxPrivate::_q_dataChanged(), QListWidgetPrivate::_q_emitCurrentItemChanged(), QComboBoxPrivate::_q_itemSelected(), QItemSelectionModelPrivate::_q_rowsAboutToBeRemoved(), QComboBoxPrivate::_q_rowsInserted(), QComboBoxPrivate::_q_rowsRemoved(), QComboBoxPrivate::_q_updateIndexBeforeChange(), QDataWidgetMapperPrivate::currentIdx(), mergeIndexes(), mergeRowLengths(), QTableViewPrivate::selectRow(), and QItemSelectionModel::setCurrentIndex().

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◆ sibling()

QModelIndex QPersistentModelIndex::sibling	(	int	row,
		int	column
	)		const

Returns the sibling at row and column or an invalid QModelIndex if there is no sibling at this position.

See also: parent()

Definition at line 593 of file qabstractitemmodel.cpp.

References QPersistentModelIndexData::index, and QModelIndex::sibling().

Referenced by mergeRowLengths().

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◆ swap()

void QPersistentModelIndex::swap ( QPersistentModelIndex & other )

inlinenoexcept

Since: 5.0

Swaps this persistent modelindex with other. This function is very fast and never fails.

Definition at line 189 of file qabstractitemmodel.h.

References d, other(), and qt_ptr_swap().

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Friends And Related Symbol Documentation

◆ operator<<

Q_CORE_EXPORT QDebug operator<<	(	QDebug	,
		const QPersistentModelIndex &
	)

friend

Definition at line 675 of file qabstractitemmodel.cpp.

◆ qHash [1/2]

size_t qHash	(	const QPersistentModelIndex &	index,
		size_t	seed = `0`
	)

friend

Since: 5.0

Returns a hash of the QPersistentModelIndex index, using seed to seed the calculation.

Definition at line 217 of file qabstractitemmodel.h.

◆ qHash() [2/2]

size_t qHash	(	const QPersistentModelIndex &	index,
		size_t	seed = `0`
	)

Since: 5.0

Returns a hash of the QPersistentModelIndex index, using seed to seed the calculation.

Definition at line 217 of file qabstractitemmodel.h.

◆ qHashEquals

bool qHashEquals	(	const QPersistentModelIndex &	a,
		const QPersistentModelIndex &	b
	)

friend

Definition at line 209 of file qabstractitemmodel.h.

The documentation for this class was generated from the following files:

qtbase/src/corelib/itemmodels/qabstractitemmodel.h
qtbase/src/corelib/itemmodels/qabstractitemmodel.cpp

Public Member Functions

Friends

Related Symbols

Detailed Description

Constructor & Destructor Documentation

◆ QPersistentModelIndex() [1/4]

◆ QPersistentModelIndex() [2/4]

◆ QPersistentModelIndex() [3/4]

◆ ~QPersistentModelIndex()

◆ QPersistentModelIndex() [4/4]

Member Function Documentation

◆ column()

◆ constInternalPointer()

◆ data()

◆ flags()

◆ internalId()

◆ internalPointer()

◆ isValid()

◆ model()

◆ multiData()

◆ operator QModelIndex()

◆ operator!=() [1/2]

◆ operator!=() [2/2]

◆ operator<()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ operator==() [1/2]

◆ operator==() [2/2]

◆ parent()

◆ row()

◆ sibling()

◆ swap()

Friends And Related Symbol Documentation

◆ operator<<

◆ qHash [1/2]

◆ qHash() [2/2]

◆ qHashEquals