\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 ()
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
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, or a default-constructed QVariant if this persistent model index is \l{isValid()}{invalid}.
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 &index, size_t seed=0)
bool	qHashEquals (const QPersistentModelIndex &a, const QPersistentModelIndex &b) noexcept
Q_CORE_EXPORT bool	comparesEqual (const QPersistentModelIndex &lhs, const QPersistentModelIndex &rhs)
Q_CORE_EXPORT bool	comparesEqual (const QPersistentModelIndex &lhs, const QModelIndex &rhs)
Q_CORE_EXPORT Qt::strong_ordering	compareThreeWay (const QPersistentModelIndex &lhs, const QPersistentModelIndex &rhs)
Q_CORE_EXPORT Qt::strong_ordering	compareThreeWay (const QPersistentModelIndex &lhs, const QModelIndex &rhs)
Q_CORE_EXPORT QDebug	operator<< (QDebug dbg, const QPersistentModelIndex &idx)

Detailed Description

\inmodule QtCore

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

\compares strong \compareswith strong QModelIndex \endcompareswith

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 184 of file qabstractitemmodel.h.

Constructor & Destructor Documentation

◆ QPersistentModelIndex() [1/4]

QPersistentModelIndex::QPersistentModelIndex ( )

Definition at line 337 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 359 of file qabstractitemmodel.cpp.

◆ 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 349 of file qabstractitemmodel.cpp.

◆ ~QPersistentModelIndex()

QPersistentModelIndex::~QPersistentModelIndex ( )

Definition at line 374 of file qabstractitemmodel.cpp.

◆ 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 198 of file qabstractitemmodel.h.

Member Function Documentation

◆ column()

int QPersistentModelIndex::column ( ) const

Returns the column this persistent model index refers to.

Definition at line 525 of file qabstractitemmodel.cpp.

◆ 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 557 of file qabstractitemmodel.cpp.

◆ data()

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

Returns the data for the given role for the item referred to by the index, or a default-constructed QVariant if this persistent model index is \l{isValid()}{invalid}.

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

Definition at line 614 of file qabstractitemmodel.cpp.

◆ flags()

Qt::ItemFlags QPersistentModelIndex::flags ( ) const

Since: 4.2

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

Definition at line 640 of file qabstractitemmodel.cpp.

◆ internalId()

quintptr QPersistentModelIndex::internalId ( ) const

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

Definition at line 573 of file qabstractitemmodel.cpp.

◆ 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 541 of file qabstractitemmodel.cpp.

◆ 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 669 of file qabstractitemmodel.cpp.

◆ model()

const QAbstractItemModel * QPersistentModelIndex::model ( ) const

Returns the model that the index belongs to.

Definition at line 650 of file qabstractitemmodel.cpp.

◆ 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 629 of file qabstractitemmodel.cpp.

◆ operator QModelIndex()

QPersistentModelIndex::operator QModelIndex ( ) const

Cast operator that returns a QModelIndex.

Definition at line 476 of file qabstractitemmodel.cpp.

◆ 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 457 of file qabstractitemmodel.cpp.

◆ 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 436 of file qabstractitemmodel.cpp.

◆ 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 586 of file qabstractitemmodel.cpp.

◆ row()

int QPersistentModelIndex::row ( ) const

Returns the row this persistent model index refers to.

Definition at line 512 of file qabstractitemmodel.cpp.

◆ 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 600 of file qabstractitemmodel.cpp.

◆ swap()

void QPersistentModelIndex::swap ( QPersistentModelIndex & other )

inlinenoexcept

Since: 5.0 \memberswap{persistent modelindex}

Definition at line 201 of file qabstractitemmodel.h.

◆ comparesEqual [1/2]

Q_CORE_EXPORT bool comparesEqual	(	const QPersistentModelIndex &	lhs,
		const QModelIndex &	rhs )

friend

Definition at line 499 of file qabstractitemmodel.cpp.

◆ comparesEqual [2/2]

Q_CORE_EXPORT bool comparesEqual	(	const QPersistentModelIndex &	lhs,
		const QPersistentModelIndex &	rhs )

friend

Definition at line 398 of file qabstractitemmodel.cpp.

◆ compareThreeWay [1/2]

Q_CORE_EXPORT Qt::strong_ordering compareThreeWay	(	const QPersistentModelIndex &	lhs,
		const QModelIndex &	rhs )

friend

Definition at line 425 of file qabstractitemmodel.cpp.

◆ compareThreeWay [2/2]

Q_CORE_EXPORT Qt::strong_ordering compareThreeWay	(	const QPersistentModelIndex &	lhs,
		const QPersistentModelIndex &	rhs )

friend

Definition at line 415 of file qabstractitemmodel.cpp.

◆ operator<<

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

friend

Definition at line 683 of file qabstractitemmodel.cpp.

References QModelIndex::QModelIndex().

◆ qHash

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

friend

Definition at line 243 of file qabstractitemmodel.h.

◆ qHashEquals

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

friend

Definition at line 223 of file qabstractitemmodel.h.

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

qtbase/src/corelib/itemmodels/qabstractitemmodel.h (7fee5f840fe6e968cb30a3ee8a17a170364be409)
qtbase/src/corelib/itemmodels/qabstractitemmodel.cpp (0cee9ee3cf8a3310570708b2b421d94083969f72)

Public Member Functions

Friends

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]

◆ parent()

◆ row()

◆ sibling()

◆ swap()

Friends And Related Symbol Documentation

◆ comparesEqual [1/2]

◆ comparesEqual [2/2]

◆ compareThreeWay [1/2]

◆ compareThreeWay [2/2]

◆ operator<<

◆ qHash

◆ qHashEquals