Contents

• Qt Quick 1.1
• Qt Platform Abstraction --Lighthouse
• Qt WebKit 2.2
• Threaded OpenGL
• Deprecated Items in Qt 4.8
• Additions to the Qt API
• New Classes, Functions, Macros, etc.

Qt 4.8 provides many improvements and enhancements over the previous releases in the Qt 4 series. This document covers the most important features in this release, separated by category.

A list of other Qt 4 features can be found on theWhat's New in Qt 4 page.

Qt Quick 1.1

Qt Quick 1.1 introducesnew changes such as new properties and better performance.

• Right-To-Left text support
• Improved image caching
• Text input improvements - Support for split-screen virtual keyboard
• PinchArea Element - enables simple pinch gesture handling
• New properties forQML Elements.

Qt Platform Abstraction --Lighthouse

QPA allows porting Qt to different windowing systems and devices easier. It provides a clean abstraction layer for portingQtGui to new window systems.

Note:QPA is considered an experimental feature in Qt 4.8. In Qt 5 it is a supported and complete feature.

Qt WebKit 2.2

The new QtWebKit release introduces bug fixes, performance improvements, and greater compiler compatibility.

Threaded OpenGL

Many QtOpenGL functions are now thread-safe. Threads that cater to different situations are now available.

• Buffer swapping thread
• Texture uploading thread
• QPainter thread

Deprecated Items in Qt 4.8

As part of Open Governance, modules in Qt 4.8 will receive maintainers and receive different support levels.

Currently, a module has an activity classification, theModule Maturity Level. As well, a list of modules and their maturity level is in theQt Developer Network.

• Qt Modules' Maturity Level - Description - description of the differentmaturity levels
• Qt Modules' Maturity Levels - Modules List - list of the Qt modules and their maturity level

Additions to the Qt API

Qt 4.8 introduces changes to the Qt API.

• C++11 support: Qt supports some of the features of the C++11 standard.QList,QVector andQStringList can be initialized with initializer lists. Most of the tool classes have a move operator. It is possible to use lambda functions in some of theQtConcurrent functions.
• Localization API

  Changes to the Localization APIs include improvements toQLocale and more support for different language code formats.

  • QLocale::quoteString() - for localized quotes
  • QLocale::createSeparatedList() - for localized list separation (e.g. "1, 2 and 3")
  • QLocale::bcp47Name() - for locale names in the canonical form according toRFC 5646 - BCP47
  • QLocale::matchingLocales() - to get a list of locales that match a criteria - e.g. a list of locales that use French language.
  • QLocale::firstDayOfWeek()
  • QLocale::weekdays()
  • QLocale::currencySymbol()
  • QLocale::toCurrencyString() - number formatting for currencies
  • QLocale::uiLanguages()
  • QLocale::nativeLanguageName()
  • QLocale::nativeCountryName()
• IP Multicast API
• Multithreaded HTTP
• QThreadLocalStorage can now store simple objects in addition to pointers

New Classes, Functions, Macros, etc.

• New Classes
• New Member Functions
• New Global Functions
• New Macros
• New Enum Types
• New Typedefs
• New Properties

New Classes

New Member Functions

ClassQGraphicsWebView:

ClassQWebPage:

ClassQThreadPool:

ClassQProcessEnvironment:

ClassQUrl:

ClassQAbstractItemModel:

ClassQObject:

ClassQSharedMemory:

ClassQTranslator:

ClassQVariant:

ClassQUuid:

ClassQBitArray:

ClassQByteArray:

ClassQContiguousCache:

ClassQChar:

ClassQElapsedTimer:

ClassQHash:

ClassQMultiHash:

ClassQLinkedList:

ClassQList:

ClassQLocale:

ClassQMap:

ClassQQueue:

ClassQPoint:

ClassQMultiMap:

ClassQRegExp:

ClassQSet:

ClassQString:

ClassQStack:

ClassQStringRef:

ClassQVarLengthArray:

ClassQVector:

ClassQXmlStreamWriter:

ClassQDBusAbstractInterface:

ClassQDBusConnection:

ClassQGraphicsGridLayout:

ClassQGraphicsLayout:

ClassQBitmap:

ClassQIcon:

ClassQImage:

ClassQPicture:

ClassQPixmap:

ClassQAbstractProxyModel:

ClassQApplication:

ClassQFileOpenEvent:

ClassQKeySequence:

ClassQSizePolicy:

ClassQWidget:

ClassQBrush:

ClassQRadialGradient:

ClassQPainter:

ClassQPainterPath:

ClassQPolygon:

ClassQPen:

ClassQPolygonF:

ClassQPrinterInfo:

ClassQRegion:

ClassQFont:

ClassQFontMetrics:

ClassQFontInfo:

ClassQFontMetricsF:

ClassQTextDocument:

ClassQTextCharFormat:

ClassQTextBlockFormat:

ClassQTextListFormat:

ClassQTextLayout:

ClassQUndoCommand:

ClassQCheckBox:

ClassQLineEdit:

ClassQRadioButton:

ClassQTabWidget:

ClassQNetworkAccessManager:

ClassQNetworkReply:

ClassQNetworkConfigurationManager:

ClassQNetworkProxyQuery:

ClassQNativeSocketEngine:

ClassQUdpSocket:

ClassQSslConfiguration:

ClassQSslSocket:

ClassQGLFormat:

ClassQGLContext:

ClassQGLFramebufferObjectFormat:

ClassQSqlRelationalTableModel:

ClassQHelpSearchQueryWidget:

New Global Functions

New Macros

New Enum Types

New Typedefs

New Properties