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 the What's New in Qt 4 page.
Qt Quick 1.1 introduces new changes such as new properties and better performance.
QPA allows porting Qt to different windowing systems and devices easier. It provides a clean abstraction layer for porting QtGui 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.
The new Qt WebKit release introduces bug fixes, performance improvements, and greater compiler compatibility.
Many Qt OpenGL functions are now thread-safe. Threads that cater to different situations are now available.
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, the Module Maturity Level. As well, a list of modules and their maturity level is in the Qt Developer Network.
Qt 4.8 introduces changes to the Qt API.
Changes to the Localization APIs include improvements to QLocale and more support for different language code formats.
Class QGraphicsGridLayout:
| void | removeItem ( QGraphicsLayoutItem * item ) |
Class QDBusAbstractInterface:
| void | setTimeout ( int timeout ) |
| int | timeout () const |
Class QNetworkReply:
| void | setFinished ( bool finished ) |
Class QHelpSearchQueryWidget:
| void | collapseExtendedSearch () |
| void | expandExtendedSearch () |
| void | setQuery ( const QList<QHelpSearchQuery> & queryList ) |
Class QNetworkConfigurationManager:
| void | configurationRemoved ( const QNetworkConfiguration & config ) |
Class QPrinterInfo:
| QPrinterInfo & | operator= ( const QPrinterInfo & other ) |
Class QContiguousCache:
| void | swap ( QContiguousCache<T> & other ) |
Class QSslConfiguration:
| bool | testSslOption ( QSsl::SslOption option ) const |
Class QDBusConnection:
| QDBusConnection | connectToPeer ( const QString & address, const QString & name ) |
| ConnectionCapabilities | connectionCapabilities () const |
| void | disconnectFromPeer ( const QString & name ) |
| QByteArray | localMachineId () |
Class QGraphicsLayout:
| bool | instantInvalidatePropagation () |
| void | setInstantInvalidatePropagation ( bool enable ) |
Class QElapsedTimer:
| qint64 | nsecsElapsed () const |
Class QGraphicsWebView:
| QPainter::RenderHints | renderHints () const |
| void | setRenderHint ( QPainter::RenderHint hint, bool enabled = true ) |
| void | setRenderHints ( QPainter::RenderHints hints ) |
Class QWebPage:
| void | viewportChangeRequested () |
Class QUndoCommand:
| QString | actionText () const |
Class QXmlStreamWriter:
| bool | hasError () const |
Class QNetworkProxyQuery:
| void | setNetworkConfiguration ( const QNetworkConfiguration & networkConfiguration ) |
Class QAbstractProxyModel:
| virtual QModelIndex | buddy ( const QModelIndex & index ) const |
| virtual bool | canFetchMore ( const QModelIndex & parent ) const |
| virtual void | fetchMore ( const QModelIndex & parent ) |
| virtual bool | hasChildren ( const QModelIndex & parent = QModelIndex() ) const |
| virtual QMimeData * | mimeData ( const QModelIndexList & indexes ) const |
| virtual QStringList | mimeTypes () const |
| virtual void | sort ( int column, Qt::SortOrder order = Qt::AscendingOrder ) |
| virtual QSize | span ( const QModelIndex & index ) const |
| virtual Qt::DropActions | supportedDropActions () const |
Class QSslSocket:
| QString | peerVerifyName () const |
| void | setPeerVerifyName ( const QString & hostName ) |
Class QGLFramebufferObjectFormat:
| bool | mipmap () const |
| void | setMipmap ( bool enabled ) |
Class QProcessEnvironment:
| void | insert ( const QProcessEnvironment & e ) |
| QStringList | keys () const |
Class QNetworkAccessManager:
| QNetworkReply * | post ( const QNetworkRequest & request, QHttpMultiPart * multiPart ) |
| QNetworkReply * | put ( const QNetworkRequest & request, QHttpMultiPart * multiPart ) |
Class QStringRef:
| bool | contains ( const QString & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | contains ( QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | contains ( const QStringRef & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | count ( const QString & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | count ( QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | count ( const QStringRef & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | endsWith ( const QString & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | endsWith ( QLatin1String str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | endsWith ( QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | endsWith ( const QStringRef & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | indexOf ( const QString & str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | indexOf ( QChar ch, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | indexOf ( QLatin1String str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | indexOf ( const QStringRef & str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | lastIndexOf ( const QString & str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | lastIndexOf ( QChar ch, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | lastIndexOf ( QLatin1String str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| int | lastIndexOf ( const QStringRef & str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | startsWith ( const QString & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | startsWith ( QLatin1String str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | startsWith ( QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| bool | startsWith ( const QStringRef & str, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const |
| QByteArray | toAscii () const |
| QByteArray | toLatin1 () const |
| QByteArray | toLocal8Bit () const |
| QVector<uint> | toUcs4 () const |
| QByteArray | toUtf8 () const |
Class QSharedMemory:
| QString | nativeKey () const |
| void | setNativeKey ( const QString & key ) |
Class QThreadPool:
| bool | waitForDone ( int msecs ) |
| bool | operator!= ( const QVarLengthArray<T, Prealloc1> & left, const QVarLengthArray<T, Prealloc2> & right ) |
| bool | operator!= ( const QPlatformWindowFormat & a, const QPlatformWindowFormat & b ) |
| const QPoint | operator* ( int factor, const QPoint & point ) |
| const QPoint | operator* ( double factor, const QPoint & point ) |
| const QPoint | operator* ( float factor, const QPoint & point ) |
| const QPoint | operator* ( const QPoint & point, int factor ) |
| const QPoint | operator* ( const QPoint & point, double factor ) |
| const QPoint | operator* ( const QPoint & point, float factor ) |
| bool | operator== ( const QVarLengthArray<T, Prealloc1> & left, const QVarLengthArray<T, Prealloc2> & right ) |
| bool | operator== ( const QPlatformWindowFormat & a, const QPlatformWindowFormat & b ) |
| Q_LIKELY ( expr ) | |
| Q_UNLIKELY ( expr ) |