org.qt-project.qtcore.693
qtcore

# Qt Core

The Meta-Object System

The Property System

Object Model

Object Trees & Ownership

Signals & Slots

Qt Bindable Properties

## The Event System

Event Classes

Classes for string data

## Implicit Sharing

Implicitly Shared Classes

Timers

## The Animation Framework

Animation Framework API

The Qt Resource System

## Qt Serialization

CBOR Support in Qt

JSON Support in Qt

Serializing Qt Data Types

Container Classes

C++20 Overview

Creating Custom Qt Types

Qt's foreach Keyword

Java-style Iterators in Qt

File and Datastream Functions

Input/Output and Networking

## Inter-Process Communication

Shared Memory

Native IPC Keys

Application Permissions

Comparison types overview

Porting QDirIterator to QDirListing

Upgrading from Qt 5

Reference - Private C++ Classes

Reference - Plugin Classes

Reference - CMake Commands

Reference - CMake Variables

Reference - CMake Target Properties

## C++ Classes

<QApplicationStatic>

<QForeach>

<QFunctionPointer>

<QOverload>

### <QPair>

Obsolete members

<QTypeInfo>

<QtAlgorithms> - Generic Algorithms

### <QtAssert>

Obsolete members

<QtCborCommon>

<QtClassHelperMacros>

### <QtCompare> - Classes and helpers for defining comparison operators

Obsolete members

### <QtCompilerDetection> - Compiler-specific Macro Definitions

Obsolete members

<QtDarwinHelpers>

### <QtDeprecationMarkers> - Qt Deprecation Macros

Obsolete members

<QtEndian> - Endian Conversion Functions

<QtEnvironmentVariables>

### <QtGlobal> - Global Qt Declarations

Obsolete members

<QtLogging> - Qt Logging Types

<QtMath> - Generic Math Functions

<QtMinMax>

<QtNumeric> - Qt Numeric Functions

<QtPlugin> - Defining Plugins

<QtPreprocessorSupport>

<QtProcessorDetection> - Architecture-specific Macro Definitions

<QtResource>

<QtSwap>

<QtSystemDetection> - Platform-specific Macro Definitions

<QtTranslation>

### <QtTypeTraits> - Qt Type Traits

Obsolete members

<QtTypes> - Qt Type Declarations

<QtVersion>

<QtVersionChecks>

### QAbstractAnimation Class Reference

List of all members

### QAbstractEventDispatcher Class Reference

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Obsolete members

### QAbstractEventDispatcherV2 Class Reference

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### QAbstractItemModel Class Reference

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### QAbstractListModel Class Reference

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### QAbstractNativeEventFilter Class Reference

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### QAbstractProxyModel Class Reference

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### QAbstractTableModel Class Reference

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### QAndroidActivityResultReceiver Class Reference

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### QAndroidBinder Class Reference

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### QAndroidIntent Class Reference

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### QAndroidParcel Class Reference

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### QAndroidService Class Reference

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### QAndroidServiceConnection Class Reference

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### QAnimationGroup Class Reference

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### QAnyStringView Class Reference

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### QAssociativeIterable Class Reference

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### QAtomicInt Class Reference

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### QAtomicInteger Class Reference

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### QAtomicPointer Class Reference

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### QAtomicScopedValueRollback Class Reference

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### QBEInteger Class Reference

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### QBaseIterator Class Reference

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### QBasicTimer Class Reference

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Obsolete members

### QBindable Class Reference

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### QBitArray Class Reference

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### QBluetoothPermission Class Reference

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### QBuffer Class Reference

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### QByteArray Class Reference

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Obsolete members

### QByteArray::FromBase64Result Class Reference

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### QByteArrayList Class Reference

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### QByteArrayMatcher Class Reference

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### QByteArrayView Class Reference

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Obsolete members

### QCache Class Reference

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### QCalendar Class Reference

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### QCalendar::SystemId Class Reference

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### QCalendarPermission Class Reference

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QCameraPermission Class Reference

### QCborArray Class Reference

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### QCborArray::ConstIterator Class Reference

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### QCborArray::Iterator Class Reference

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### QCborMap Class Reference

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### QCborMap::ConstIterator Class Reference

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### QCborMap::Iterator Class Reference

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### QCborStreamReader Class Reference

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### QCborStreamWriter Class Reference

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### QCborValue Class Reference

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### QChar Class Reference

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### QChildEvent Class Reference

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### QChronoTimer Class Reference

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### QCollator Class Reference

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### QCollatorSortKey Class Reference

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### QCommandLineOption Class Reference

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### QCommandLineParser Class Reference

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### QConcatenateTablesProxyModel Class Reference

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### QContactsPermission Class Reference

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### QContiguousCache Class Reference

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### QCoreApplication Class Reference

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### QCryptographicHash Class Reference

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Obsolete members

### QDataStream Class Reference

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### QDate Class Reference

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### QDateTime Class Reference

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Obsolete members

### QDeadlineTimer Class Reference

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### QDebug Class Reference

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### QDebugStateSaver Class Reference

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### QDir Class Reference

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### QDirIterator Class Reference

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### QDirListing Class Reference

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### QDirListing::DirEntry Class Reference

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### QDirListing::const_iterator Class Reference

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QDirListing::sentinel Class Reference

### QDynamicPropertyChangeEvent Class Reference

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### QEasingCurve Class Reference

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### QElapsedTimer Class Reference

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### QEnableSharedFromThis Class Reference

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### QEvent Class Reference

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### QEventLoop Class Reference

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### QEventLoopLocker Class Reference

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### QException Class Reference

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### QExplicitlySharedDataPointer Class Reference

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### QFile Class Reference

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### QFileDevice Class Reference

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### QFileInfo Class Reference

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### QFileSelector Class Reference

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### QFileSystemWatcher Class Reference

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### QFlag Class Reference

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### QFlags Class Reference

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### QFuture Class Reference

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Obsolete members

### QFuture::const_iterator Class Reference

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### QFutureIterator Class Reference

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### QFutureSynchronizer Class Reference

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### QFutureWatcher Class Reference

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Obsolete members

### QGenericArgument Class Reference

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### QGenericReturnArgument Class Reference

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### QGregorianCalendar Class Reference

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### QHash Class Reference

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Obsolete members

### QHash::const_iterator Class Reference

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### QHash::iterator Class Reference

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### QHash::key_iterator Class Reference

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### QHashIterator Class Reference

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### QIODevice Class Reference

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### QIODeviceBase Class Reference

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### QIdentityProxyModel Class Reference

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### QItemSelection Class Reference

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### QItemSelectionModel Class Reference

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### QItemSelectionRange Class Reference

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### QIterable Class Reference

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QJalaliCalendar Class Reference

### QJniArray Class Reference

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### QJniArrayBase Class Reference

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### QJniEnvironment Class Reference

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Obsolete members

### QJniObject Class Reference

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### QJsonArray Class Reference

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### QJsonArray::const_iterator Class Reference

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### QJsonArray::iterator Class Reference

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### QJsonDocument Class Reference

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### QJsonObject Class Reference

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### QJsonObject::const_iterator Class Reference

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### QJsonObject::iterator Class Reference

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### QJsonValue Class Reference

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### QJulianCalendar Class Reference

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### QKeyCombination Class Reference

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Obsolete members

### QKeyValueIterator Class Reference

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### QLEInteger Class Reference

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QLatin1String Class Reference

### QLatin1StringMatcher Class Reference

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### QLatin1StringView Class Reference

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### QLibrary Class Reference

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### QLibraryInfo Class Reference

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Obsolete members

### QLine Class Reference

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### QLineF Class Reference

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Obsolete members

### QList Class Reference

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Obsolete members

QList::const_iterator Class Reference

QList::iterator Class Reference

### QListIterator Class Reference

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### QLocale Class Reference

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Obsolete members

### QLocationPermission Class Reference

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### QLockFile Class Reference

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### QLoggingCategory Class Reference

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### QMap Class Reference

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### QMap::const_iterator Class Reference

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Obsolete members

### QMap::iterator Class Reference

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Obsolete members

### QMap::key_iterator Class Reference

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### QMapIterator Class Reference

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### QMargins Class Reference

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### QMarginsF Class Reference

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### QMessageAuthenticationCode Class Reference

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QMessageLogContext Class Reference

### QMessageLogger Class Reference

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### QMetaClassInfo Class Reference

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### QMetaContainer Class Reference

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### QMetaEnum Class Reference

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### QMetaMethod Class Reference

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Obsolete members

### QMetaObject::Connection Class Reference

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### QMetaProperty Class Reference

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### QMetaSequence Class Reference

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### QMetaType Class Reference

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Obsolete members

QMicrophonePermission Class Reference

### QMilankovicCalendar Class Reference

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### QMimeData Class Reference

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### QMimeDatabase Class Reference

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### QMimeType Class Reference

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### QModelIndex Class Reference

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### QModelRoleData Class Reference

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### QModelRoleDataSpan Class Reference

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### QMultiHash Class Reference

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### QMultiHash::const_iterator Class Reference

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### QMultiHash::iterator Class Reference

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### QMultiHash::key_iterator Class Reference

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### QMultiMap Class Reference

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Obsolete members

### QMultiMap::const_iterator Class Reference

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Obsolete members

### QMultiMap::iterator Class Reference

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Obsolete members

### QMultiMap::key_iterator Class Reference

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### QMultiMapIterator Class Reference

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### QMutableHashIterator Class Reference

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### QMutableListIterator Class Reference

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### QMutableMapIterator Class Reference

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### QMutableMultiMapIterator Class Reference

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### QMutableSetIterator Class Reference

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### QMutex Class Reference

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### QMutexLocker Class Reference

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### QNativeIpcKey Class Reference

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### QNtfsPermissionCheckGuard Class Reference

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### QObject Class Reference

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Obsolete members

### QObjectBindableProperty Class Reference

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### QObjectCleanupHandler Class Reference

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### QObjectComputedProperty Class Reference

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### QOperatingSystemVersion Class Reference

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### QParallelAnimationGroup Class Reference

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### QPartialOrdering Class Reference

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### QPauseAnimation Class Reference

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### QPermission Class Reference

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### QPersistentModelIndex Class Reference

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### QPluginLoader Class Reference

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### QPoint Class Reference

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### QPointF Class Reference

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### QPointer Class Reference

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### QProcess Class Reference

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Obsolete members

### QProcessEnvironment Class Reference

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### QPromise Class Reference

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### QProperty Class Reference

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### QPropertyAnimation Class Reference

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### QPropertyBindingError Class Reference

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### QPropertyChangeHandler Class Reference

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### QPropertyData Class Reference

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### QPropertyNotifier Class Reference

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### QQueue Class Reference

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### QRandomGenerator Class Reference

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### QRandomGenerator64 Class Reference

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### QReadLocker Class Reference

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### QReadWriteLock Class Reference

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### QRect Class Reference

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### QRectF Class Reference

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### QRecursiveMutex Class Reference

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### QRegularExpression Class Reference

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Obsolete members

### QRegularExpressionMatch Class Reference

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### QRegularExpressionMatchIterator Class Reference

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### QResource Class Reference

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QRomanCalendar Class Reference

### QRunnable Class Reference

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### QSaveFile Class Reference

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### QScopeGuard Class Reference

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### QScopedArrayPointer Class Reference

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Obsolete members

### QScopedPointer Class Reference

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Obsolete members

### QScopedPropertyUpdateGroup Class Reference

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### QScopedValueRollback Class Reference

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### QSemaphore Class Reference

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### QSemaphoreReleaser Class Reference

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### QSequentialAnimationGroup Class Reference

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### QSequentialIterable Class Reference

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### QSet Class Reference

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### QSet::const_iterator Class Reference

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### QSet::iterator Class Reference

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### QSetIterator Class Reference

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### QSettings Class Reference

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### QSharedData Class Reference

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### QSharedDataPointer Class Reference

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### QSharedMemory Class Reference

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### QSharedPointer Class Reference

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### QSignalBlocker Class Reference

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### QSignalMapper Class Reference

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### QSize Class Reference

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### QSizeF Class Reference

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### QSocketNotifier Class Reference

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Obsolete members

### QSortFilterProxyModel Class Reference

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### QSpan Class Reference

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### QStack Class Reference

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### QStandardPaths Class Reference

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### QStaticByteArrayMatcher Class Reference

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### QStaticLatin1StringMatcher Class Reference

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### QStorageInfo Class Reference

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### QString Class Reference

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Obsolete members

### QStringConverter Class Reference

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### QStringDecoder Class Reference

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### QStringEncoder Class Reference

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### QStringList Class Reference

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### QStringListModel Class Reference

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### QStringMatcher Class Reference

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### QStringTokenizer Class Reference

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### QStringView Class Reference

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Obsolete members

### QSysInfo Class Reference

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### QSystemSemaphore Class Reference

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### QTaggedIterator Class Reference

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### QTemporaryDir Class Reference

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### QTemporaryFile Class Reference

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### QTextBoundaryFinder Class Reference

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### QTextStream Class Reference

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### QThread Class Reference

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### QThreadPool Class Reference

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### QThreadStorage Class Reference

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### QTime Class Reference

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### QTimeLine Class Reference

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### QTimeZone Class Reference

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Obsolete members

### QTimer Class Reference

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Obsolete members

### QTimerEvent Class Reference

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### QTranslator Class Reference

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### QTransposeProxyModel Class Reference

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### QTypeRevision Class Reference

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### QUnhandledException Class Reference

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### QUntypedBindable Class Reference

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### QUrl Class Reference

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### QUrlQuery Class Reference

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### QUtf8StringView Class Reference

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Obsolete members

### QUuid Class Reference

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### QVarLengthArray Class Reference

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Obsolete members

### QVariant Class Reference

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Obsolete members

### QVariantAnimation Class Reference

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### QVariantConstPointer Class Reference

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### QVariantPointer Class Reference

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### QVariantRef Class Reference

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### QVector Class Reference

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### QVersionNumber Class Reference

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### QWaitCondition Class Reference

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### QWeakPointer Class Reference

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### QWinEventNotifier Class Reference

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### QWriteLocker Class Reference

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### QXmlStreamAttribute Class Reference

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### QXmlStreamAttributes Class Reference

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### QXmlStreamEntityDeclaration Class Reference

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### QXmlStreamEntityResolver Class Reference

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### QXmlStreamNamespaceDeclaration Class Reference

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### QXmlStreamNotationDeclaration Class Reference

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### QXmlStreamReader Class Reference

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### QXmlStreamWriter Class Reference

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### Qt::partial_ordering Class Reference

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### Qt::strong_ordering Class Reference

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Qt::totally_ordered_wrapper Class Reference

### Qt::weak_ordering Class Reference

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### qfloat16 Class Reference

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android-deploy-qt-tool.html
android-manifest-file-configuration.html
android-test-runner.html
animation-overview.html
animation.html
bindableproperties.html
cbor.html
cmake-commands-qtcore.html
cmake-global-properties-qtcore.html
cmake-global-property-qt-targets-folder.html
cmake-source-file-properties-qtcore.html
cmake-source-file-property-qt-discard-file-contents.html
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cmake-variables-qtcore.html
comparison-types.html
containers.html
cpp20-overview.html
custom-types.html
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events.html
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foreach-keyword.html
images/abstract-connections.png
images/androidnotifier.png
images/animations-architecture.png
images/arrow_bc.png
images/bgrContent.png
images/bindable_properties_example.png
images/brush-styles.png
images/btn_next.png
images/btn_prev.png
images/bullet_dn.png
images/bullet_sq.png
images/calendarwindow_transition.png
images/cbordump.png
images/convert.png
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images/filemenu.png
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images/home.png
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images/javaiterators1.png
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images/localfortuneclient-example.png
images/localfortuneserver-example.png
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images/mandelbrot-example.png
images/mandelbrot_scroll1.png
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images/mandelbrot_zoom1.png
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images/modelview-begin-insert-columns.png
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images/modelview-begin-remove-columns.png
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images/qeasingcurve-inback.png
images/qeasingcurve-inbounce.png
images/qeasingcurve-incirc.png
images/qeasingcurve-incubic.png
images/qeasingcurve-inelastic.png
images/qeasingcurve-inexpo.png
images/qeasingcurve-inoutback.png
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images/qeasingcurve-insine.png
images/qeasingcurve-linear.png
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images/qeasingcurve-outcubic.png
images/qeasingcurve-outelastic.png
images/qeasingcurve-outexpo.png
images/qeasingcurve-outinback.png
images/qeasingcurve-outinbounce.png
images/qeasingcurve-outincirc.png
images/qeasingcurve-outincubic.png
images/qeasingcurve-outinelastic.png
images/qeasingcurve-outinexpo.png
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images/qeasingcurve-outquint.png
images/qeasingcurve-outsine.png
images/qimage-scaling.png
images/qline-coordinates.png
images/qline-point.png
images/qlinef-bounded.png
images/qlinef-normalvector.png
images/qlinef-unbounded.png
images/qpen-bevel.png
images/qpen-custom.png
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images/qpen-solid.png
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images/qrect-unite.png
images/qrectf-coordinates.png
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