Qt 5.0 的新功能

Qt Core 变化

QStandardPaths

QStandardPaths is a more powerful version of QDesktopServices that was present in Qt 4. Modeled after KStandardDirs from KDE 4, it contains additional features such as searching for all occurrences of a given file in the storage locations.

编译时校验信号槽连接

QObject now supports an additional syntax for connecting signals to slots, which forces the compiler to check whether the signal and the receiver exist and their arguments are compatible.

This syntax allows connecting a signal to any kind of C++ receiver, including C++11 lambdas, member functions, or static functions. The receivers no longer need to be declared as slots, but such declarations are still recommended for readability.

基于字符串的连接和基于函子的连接之间的差异 了解更多细节。

Perl 兼容的正则表达式

QRegularExpression is introduced to provide better support for regular expressions compatible with Perl. This class is more powerful and faster than QRegExp , and supports more features such as lazy and possessive quantifiers, lookbehinds, named capturing groups, and iteration of matches.

Qt GUI 变化

用于窗口和渲染的新类

A new set of enabler classes have been added, most importantly QWindow , QScreen , QSurfaceFormat ,和 QOpenGLContext . These are now used as backends for the Qt Widgets module and by Qt Quick 2.

OpenGL 类

Most of the useful Qt OpenGL classes have been polished and moved into Qt GUI . A few important ones are, QOpenGLFramebufferObject , QOpenGLShaderProgram , QOpenGLFunctions , and so on. For the complete list, refer to Qt GUI C++ 类 .

This change introduces QOpenGLContext as a replacement for QGLContext. This replacement class is more generic and decoupled from QWindow , making it to support more use cases such as using the same context for multiple surfaces.

QOpenGLPaintDevice

Instead of having QWindow and QOpenGLFramebufferObject be subclasses of QPaintDevice , you can now use QOpenGLPaintDevice . This new alternative can be created on the stack, makes it easier and flexible to render into the currently bound context using QPainter .

Qt Network 变化

QDnsLookup

It is now possible to lookup DNS records using the new QDnsLookup API. This does not replace QHostInfo , which is still the API to be used for resolving a host name to an IP address. QDnsLookup is mainly used for other types of DNS record, such as SRV, TXT and MX.

注意: This new class replaces the Q3Dns API, which is removed in Qt 5.

更好地支持 IPv6 和双模网络

Most applications using host names and network layer transparent protocols, will now gain IPv6 support transparently. This means, QTcpServer and QUdpSocket bound to QHostAddress::Any can now receive both IPv4 and IPv6 connections, although, QHostAddress::AnyIPv4 and QHostAddress::AnyIPv6 can be used to bind to only one protocol.

Outgoing http connections using QNetworkAccessManager will now attempt both IPv4 and IPv6 connections in parallel, and use the one that succeeds first.

绑定 TCP 套接字

QTcpSocket can be bound to an IP address before connecting, which is useful for limiting connection to a specific interface in a multi-homed environment.

SSL 证书

SSL certificate extensions can now be accessed to enable further development of SSL support in Qt.

Developers can also verify an SSL certificate chain programatically now.

用于有缺陷 SSL 服务器的解决方案

QSsl::SslOption enum now allows a QSslSocket -based code to access legacy systems by enabling bug workarounds.

注意: This change is also back-ported to Qt 4.8.

支持不透明私钥

This allows applications to read private keys from devices such as PKCS#11 dongles, as illustrated by the qsslkey example

Qt QML 变化

This is a new module in Qt 5 that provides the QML engine and the backend infrastructure.

QML 引擎

  • v8 JavaScript 引擎
  • Various parser and compiler optimizations have been implemented along with the new bindings optimizer.
  • Loading/compilation can now be performed in a separate thread. This can be enabled by loading a loader object asynchronously through its source property, or by passing the Component.Asynchronous parameter to Qt.createComponent() .
  • New QQmlEngine::trimComponentCache () function safely discards unused data in the engine’s component cache to free memory.

类型系统

  • New var property type can hold JavaScript references.
  • QML properties of type var and variant can now hold pixmaps.
  • Value type improvements:
    • QColor is now a value type. The red, green, blue and alpha channels of a “color” property can now be accessed using “r”, “g”, “b” and “a” properties.
    • Improved support for QVector4D , now constructible in QML using Qt.vector4d() .
  • Support for certain sequence types ( QList <int>, QList <qreal>, QList <bool>, QList < QUrl >, QList < QString > and QStringList ) has been improved. QObjects can define Q_PROPERTYs of these types which can be accessed from JavaScript.

其它

  • JavaScript (.js) files can now import QML modules and other JavaScript files using the “import” statement.
  • QQmlExpression can now be constructed directly (and more efficiently) from a QQmlScriptString .
  • The component returned by Qt.createComponent() is no longer the owned by the engine. Be sure to hold a reference,or provide a parent.

Qt Quick 变化

This is a new module in Qt 5 which provides the visual canvas and scenegraph backend as well as the QtQuick QML module for QML-based application development.

The module replaces the QDeclarative* equivalents in QtQuick 1 with the following:

Qt Quick C++ 类 for the complete list.

QtQuick 2.0 QML module is a major update, and the following sections outline the features that come with it:

新图形体系结构

视觉和图形类型

动画

文本类型的变化

  • 文本 :
    • AutoText format now switches to StyledText instead of RichText .
    • lineLaidOut signal is emitted for every line during the layout process to give the option of positioning and/or resizing text as they are laid out.
    • doLayout() method can now trigger the text layout from JavaScript.
    • ElideRight to support text that spans multiple lines.
    • fontSizeMode property now supports wrapping the text to the item size.
    • minimumPixelSize and minimumPointSize properties can be used to specify a lower bound when auto-fitting.
  • TextEdit.textFormat property now defaults to PlainText instead of AutoText .
  • TextInput now has wrapMode and verticalAlignment properties.
  • TextInput.positionAt() now takes y value.

用户输入

  • New MultiPointTouchArea type can process multi-point touches and provide information about the touch points including position, pressure and velocity.
  • MouseArea type now:
    • Propagates wheel events.
    • Propagates clicked , doubleClicked and pressAndHold events differently to pressed . These events are propagated to the handler of the topmost MouseArea in the stack-order.
    • Can ignore the propagated events using the propagateComposedEvents . Such ignored events are propagated to the next MouseArea handler in the stack-order.

专用容器

  • Flickable type now has:
    • a new rebound property that enables you to specify the transition type for the bounce back animation.
    • New topMargin , bottomMargin , leftMargin ,和 rightMargin properties allow extra margin space to be specified. This is useful to implement the pull-to-refresh functionality for a list.
    • New xOrigin and yOrigin properties provide the top left position of the content item.
    • New dragging , draggingHorizontally ,和 draggingVertically properties that provide information when the flickable area is dragged.

Positioners

The following features are related to Row, Column, Grid, and Flow types:

  • The “add” and “move” transitions can now access the ViewTransition attached property, and also animate arbitrary item properties (instead of being restricted to animating an item’s position).
  • New Positioner.index , Positioner.isFirstItem and Positioner.isLastItem attached properties for items within a positioner.
  • Grid type has new rowSpacing and columnSpacing 特性。
  • All spacing properties on positioners now use real numbers instead of integers.

模型和视图

  • ListView and GridView :
    • Transitions can be specified to animate the adding, removing and moving of items in a view. For details, see ViewTransition , ListView.add , ListView.addDisplaced , GridView.add ,和 GridView.addDisplaced .
    • New verticalLayoutDirection property enables items to be laid out from bottom-to-top using the BottomToTop 枚举值。
    • cacheBuffer property now has a non-zero default and delegates in the cacheBuffer are created asynchronously.
    • New headerItem and footerItem properties provide access to the instantiated header and footer items.
    • RightToLeft layout now also reverses the preferredHighlightBegin and preferredHighlightEnd .
  • ListView 's new section.labelPositioning property can fix the current section label to the start of the view, and the next section label to the end of the view, so that labels do not scroll while section items are still in view.
  • PathView has two new properties, curretnItem and maximumFlickVelocity .

粒子系统支持

The new QtQuick .Particles 2.0 module provides support for the composition of a variety of 2D particle systems. See 使用 Qt Quick 粒子系统 了解更多细节。

实用程序类型

  • New PathArc , PathCurve and PathSvg types:
    • PathArc and PathCurve support the construction of arcs and catmull-rom curves, respectively. PathSvg supports the construction of a path from an SVG string.
  • Loader:
    • New asynchronous property allows components to be instantiated with a lower chance of blocking. With the asynchronous property set to true , the component is compiled in a background thread.
    • New active property delays instantiation of a Loader object’s item.
    • New setSource(JSObject) method to specify initial property values for the loaded item, similar to Component.createObject() .
    • sourceChanged signal is now only emitted when the source changes and the sourceComponentChanged signal is now emitted when the sourceComponent is changed. Ealier, these signals were emitted by the Loader only when one of the two properties had changed.
    • Loader type can now be used as a value source, and it can restore any previously set binding if its "when" clause becomes false .

Qt Multimedia 变化

Qt Multimedia is an essential module replacing the QtMultimedia library and Qt MultimediaKit mobility API in Qt 4.8. It features full support for Audio and Video playback, and recording. Support for web cameras is integrated.

Qt Multimedia uses the system’s native multimedia engine as a backend, and does not come with its own audio or video codecs. Thus the supported list of codecs is equivalent to the ones supported by the underlying OS.

It uses DirectShow and WMF on Windows, AVFoundation on Mac and gstreamer on Linux.

新的类和函数

The section provides a comprehensive list of all new classes and functions introduced in Qt 5.

新类

新成员函数

Class QDebug :

autoInsertSpaces () const
setAutoInsertSpaces (bool b )
swap (QDebug & other )

Class QDir :

removeRecursively ()
swap (QDir & other )

Class QFileInfo :

isNativePath () const
swap (QFileInfo & other )

Class QProcessEnvironment :

swap (QProcessEnvironment & other )

Class QProcess :

arguments () const
program () const

Class QAbstractEventDispatcher :

filterNativeEvent (const QByteArray & eventType , void * message , long * result )
installNativeEventFilter (QAbstractNativeEventFilter * filterObj )
removeNativeEventFilter (QAbstractNativeEventFilter * filter )

Class QAbstractItemModel :

layoutAboutToBeChanged (const QList<QPersistentModelIndex> & parents , QAbstractItemModel::LayoutChangeHint hint )
layoutChanged (const QList<QPersistentModelIndex> & parents , QAbstractItemModel::LayoutChangeHint hint )

Class QCoreApplication :

installNativeEventFilter (QAbstractNativeEventFilter * filterObj )
removeNativeEventFilter (QAbstractNativeEventFilter * filterObject )

Class QPersistentModelIndex :

swap (QPersistentModelIndex & other )

Class QByteArray :

cbegin () const
cend () const

Class QPointer :


Class QChar :

hasMirrored (uint ucs4 )
isDigit (uint ucs4 )
isLetter (uint ucs4 )
isLetterOrNumber (uint ucs4 )
isLower (uint ucs4 )
isMark (uint ucs4 )
isNonCharacter (uint ucs4 )
isNonCharacter () const
isNumber (uint ucs4 )
isPrint (uint ucs4 )
isPunct (uint ucs4 )
isSpace (uint ucs4 )
isSurrogate (uint ucs4 )
isSurrogate () const
isSymbol (uint ucs4 )
isTitleCase (uint ucs4 )
isUpper (uint ucs4 )

Class QCryptographicHash :

addData (QIODevice * device )

Class QDateTime :

swap (QDateTime & other )

Class QEasingCurve :

swap (QEasingCurve & other )
toCubicSpline () const

Class QHash :

cbegin () const
cend () const

Class QLatin1String :

operator!= (const QByteArray & other ) const
operator< (const QByteArray & other ) const
operator<= (const QByteArray & other ) const
operator== (const QByteArray & other ) const
operator> (const QByteArray & other ) const
operator>= (const QByteArray & other ) const

Class QLinkedList :

cbegin () const
cend () const

Class QList :

cbegin () const
cend () const

Class QMap :

cbegin () const
cend () const

Class QMetaMethod :

fromSignal (PointerToMemberFunction signal )
isValid () const
methodSignature () const
name () const
parameterCount () const
parameterType (int index ) const
returnType () const

Class QMetaObject :

checkConnectArgs (const QMetaMethod & signal , const QMetaMethod & method )

Class QMetaType :

construct (int type , void * where , const void * copy )
construct (void * where , const void * copy ) const
create (const void * copy ) const
destroy (void * data ) const
destruct (int type , void * where )
destruct (void * data ) const
flags () const
isRegistered () const
isValid () const
metaObjectForType (int type )
sizeOf (int type )
sizeOf () const
typeFlags (int type )

Class QObject :

virtual connectNotify (const QMetaMethod & signal )
virtual disconnectNotify (const QMetaMethod & signal )
findChildren (const QRegularExpression & re , Qt::FindChildOptions options ) const
isSignalConnected (const QMetaMethod & signal ) const

Class QSet :

cbegin () const
cend () const

Class QSharedPointer :

reset ()
reset (T * t )
reset (T * t , Deleter deleter )

Class QUrl :

setQuery (const QUrlQuery & query )
toDisplayString (QUrl::FormattingOptions options ) const

Class QUuid :

createUuidV3 (const QUuid & ns , const QByteArray & baseData )
createUuidV3 (const QUuid & ns , const QString & baseData )
createUuidV5 (const QUuid & ns , const QByteArray & baseData )
createUuidV5 (const QUuid & ns , const QString & baseData )

Class QVariant :


Class QThread :

eventDispatcher () const
setEventDispatcher (QAbstractEventDispatcher * eventDispatcher )

Class QSize :

scaled (const QSize & s , Qt::AspectRatioMode mode ) const
scaled (int width , int height , Qt::AspectRatioMode mode ) const
transposed () const

Class QSizeF :

scaled (const QSizeF & s , Qt::AspectRatioMode mode ) const
scaled (qreal width , qreal height , Qt::AspectRatioMode mode ) const
transposed () const

Class QString :

append (const QChar * str , int len )
cbegin () const
cend () const
contains (const QRegularExpression & re ) const
count (const QRegularExpression & re ) const
fromLatin1 (const QByteArray & str )
fromLocal8Bit (const QByteArray & str )
fromUtf8 (const QByteArray & str )
indexOf (const QRegularExpression & re , int from ) const
lastIndexOf (const QRegularExpression & re , int from ) const
remove (const QRegularExpression & re )
replace (const QRegularExpression & re , const QString & after )
section (const QRegularExpression & re , int start , int end , QString::SectionFlags flags ) const
split (const QRegularExpression & re , QString::SplitBehavior behavior ) const
toHtmlEscaped () const

Class QStringList :

filter (const QRegularExpression & re ) const
indexOf (const QRegularExpression & re , int from ) const
join (QChar separator ) const
lastIndexOf (const QRegularExpression & re , int from ) const
replaceInStrings (const QRegularExpression & re , const QString & after )

Class QVarLengthArray :

back ()
back () const
cbegin () const
cend () const
empty () const
front ()
front () const
length () const
pop_back ()
push_back (const T & t )

Class QVector :

cbegin () const
cend () const

Class QLibraryInfo :


Class QDBusPendingCall :

swap (QDBusPendingCall & other )

Class QDBusUnixFileDescriptor :

swap (QDBusUnixFileDescriptor & other )

Class QAbstractFormBuilder :

errorString () const

Class QDesignerContainerExtension :

virtual canAddWidget () const
virtual canRemove (int index ) const

Class QDesignerFormWindowInterface :

activateResourceFilePaths (const QStringList & paths , int * errorCount , QString * errorMessages )
activeResourceFilePaths () const
virtual checkContents () const = 0
virtual formContainer () const = 0

Class QDesignerFormWindowManagerInterface :

virtual action (QDesignerFormWindowManagerInterface::Action action ) const = 0
virtual actionGroup (QDesignerFormWindowManagerInterface::ActionGroup actionGroup ) const = 0
virtual closeAllPreviews () = 0
virtual showPluginDialog () = 0
virtual showPreview () = 0

Class QDesignerPropertySheetExtension :

virtual isEnabled (int index ) const

Class QDrag :

dragCursor (Qt::DropAction action ) const

Class QGuiApplication :


Class QMouseEvent :

localPos () const
screenPos () const
windowPos () const

Class QPalette :

swap (QPalette & other )

Class QRegion :

isNull () const

Class TouchPoint :


Class QFont :

removeSubstitutions (const QString & familyName )
swap (QFont & other )

Class QFontMetricsF :

swap (QFontMetricsF & other )

Class QFontInfo :

swap (QFontInfo & other )

Class QFontMetrics :

swap (QFontMetrics & other )

Class QGlyphRun :

boundingRect () const
flags () const
isEmpty () const
isRightToLeft () const
setBoundingRect (const QRectF & boundingRect )
setFlag (QGlyphRun::GlyphRunFlag flag , bool enabled )
setFlags (QGlyphRun::GlyphRunFlags flags )
setRightToLeft (bool rightToLeft )
swap (QGlyphRun & other )

Class QRawFont :

boundingRect (quint32 glyphIndex ) const
swap (QRawFont & other )

Class QStaticText :

swap (QStaticText & other )

Class QTextCharFormat :

fontLetterSpacingType () const
fontStretch () const
setFontLetterSpacingType (QFont::SpacingType letterSpacingType )
setFontStretch (int factor )

Class QTextCursor :

swap (QTextCursor & other )

Class QTextFormat :

swap (QTextFormat & other )

Class QTextLine :

glyphRuns (int from , int length ) const

Class QPlatformFontDatabase :

virtual defaultFont () const
virtual fontsAlwaysScalable () const
virtual resolveFontFamilyAlias (const QString & family ) const
virtual standardSizes () const

Class QCameraExposureControl :

virtual actualValue (QCameraExposureControl::ExposureParameter parameter ) const = 0
actualValueChanged (int parameter )
virtual isParameterSupported (QCameraExposureControl::ExposureParameter parameter ) const = 0
parameterRangeChanged (int parameter )
virtual requestedValue (QCameraExposureControl::ExposureParameter parameter ) const = 0
requestedValueChanged (int parameter )
virtual setValue (QCameraExposureControl::ExposureParameter parameter , const QVariant & value ) = 0
virtual supportedParameterRange (QCameraExposureControl::ExposureParameter parameter , bool * continuous ) const = 0

Class QCameraFeedbackControl :

virtual isEventFeedbackEnabled (QCameraFeedbackControl::EventType event ) const = 0
virtual isEventFeedbackLocked (QCameraFeedbackControl::EventType event ) const = 0
virtual resetEventFeedback (QCameraFeedbackControl::EventType event ) = 0
virtual setEventFeedbackEnabled (QCameraFeedbackControl::EventType event , bool enabled ) = 0
virtual setEventFeedbackSound (QCameraFeedbackControl::EventType event , const QString & filePath ) = 0

Class QAbstractSocket :

bind (const QHostAddress & address , quint16 port , QAbstractSocket::BindMode mode )
bind (quint16 port , QAbstractSocket::BindMode mode )
pauseMode () const
virtual resume ()
setPauseMode (QAbstractSocket::PauseModes pauseMode )

Class QHostAddress :

isLoopback () const

Class QHttpPart :

swap (QHttpPart & other )

Class QLocalServer :

listen (qintptr socketDescriptor )
socketOptions () const

Class QNetworkAccessManager :


Class QNetworkAddressEntry :

swap (QNetworkAddressEntry & other )

Class QNetworkCacheMetaData :

swap (QNetworkCacheMetaData & other )

Class QNetworkConfiguration :

swap (QNetworkConfiguration & other )

Class QNetworkCookie :

normalize (const QUrl & url )
operator== (const QNetworkCookie & other ) const
swap (QNetworkCookie & other )

Class QNetworkCookieJar :

virtual deleteCookie (const QNetworkCookie & cookie )
virtual insertCookie (const QNetworkCookie & cookie )
virtual updateCookie (const QNetworkCookie & cookie )
virtual validateCookie (const QNetworkCookie & cookie , const QUrl & url ) const

Class QNetworkInterface :

swap (QNetworkInterface & other )

Class QNetworkProxy :

hasRawHeader (const QByteArray & headerName ) const
header (QNetworkRequest::KnownHeaders header ) const
rawHeader (const QByteArray & headerName ) const
rawHeaderList () const
setHeader (QNetworkRequest::KnownHeaders header , const QVariant & value )
setRawHeader (const QByteArray & headerName , const QByteArray & headerValue )
swap (QNetworkProxy & other )

Class QNetworkProxyQuery :

swap (QNetworkProxyQuery & other )

Class QNetworkReply :

virtual ignoreSslErrorsImplementation (const QList<QSslError> & errors )
virtual setSslConfigurationImplementation (const QSslConfiguration & configuration )
virtual sslConfigurationImplementation (QSslConfiguration & configuration ) const

Class QNetworkRequest :

swap (QNetworkRequest & other )

Class QNetworkSession :

usagePoliciesChanged (QNetworkSession::UsagePolicies usagePolicies )

Class QSslCertificate :

extensions () const
issuerInfoAttributes () const
subjectInfoAttributes () const
swap (QSslCertificate & other )
toText () const
verify (QList<QSslCertificate> certificateChain , const QString & hostName )

Class QSslCipher :

swap (QSslCipher & other )

Class QSslConfiguration :

swap (QSslConfiguration & other )

Class QSslError :

swap (QSslError & other )

Class QSslKey :

swap (QSslKey & other )

Class QSslSocket :


Class QTcpServer :

acceptError (QAbstractSocket::SocketError socketError )
pauseAccepting ()
resumeAccepting ()

Class QPrinterInfo :

description () const
location () const
makeAndModel () const
printerInfo (const QString & printerName )

Class QRotationReading :

setFromEuler (qreal x , qreal y , qreal z )

Class QSensor :

isFeatureSupported (QSensor::Feature feature ) const

Class QSensorBackend :

virtual isFeatureSupported (QSensor::Feature feature ) const

Class QSqlDriver :

notification (const QString & name , QSqlDriver::NotificationSource source , const QVariant & payload )

Class QSqlTableModel :

isDirty () const
record (int row ) const
virtual selectRow (int row )

Class QUiLoader :

errorString () const

Class QSignalSpy :

wait (int timeout )

Class QTouchEventSequence :

move (int touchId , const QPoint & pt , QWindow * window )
press (int touchId , const QPoint & pt , QWindow * window )
release (int touchId , const QPoint & pt , QWindow * window )

Class QAbstractItemDelegate :

virtual destroyEditor (QWidget * editor , const QModelIndex & index ) const

Class QColorDialog :

standardColor (int index )

Class QComboBox :

currentTextChanged (const QString & text )

Class QHeaderView :

sectionResizeMode (int logicalIndex ) const
sectionsClickable () const
sectionsMovable () const
setSectionResizeMode (QHeaderView::ResizeMode mode )
setSectionResizeMode (int logicalIndex , QHeaderView::ResizeMode mode )
setSectionsClickable (bool clickable )
setSectionsMovable (bool movable )

Class QTabBar :

virtual minimumTabSizeHint (int index ) const

Class QWidget :

backingStore () const
grab (const QRect & rectangle )
virtual hasHeightForWidth () const
windowHandle () const

名称空间中的新函数

keyClick (QWindow * window , char key , Qt::KeyboardModifiers modifier , int delay )
keyClick (QWindow * window , Qt::Key key , Qt::KeyboardModifiers modifier , int delay )
keyEvent (QTest::KeyAction action , QWindow * window , char ascii , Qt::KeyboardModifiers modifier , int delay )
keyEvent (QTest::KeyAction action , QWindow * window , Qt::Key key , Qt::KeyboardModifiers modifier , int delay )
keyPress (QWindow * window , char key , Qt::KeyboardModifiers modifier , int delay )
keyPress (QWindow * window , Qt::Key key , Qt::KeyboardModifiers modifier , int delay )
keyRelease (QWindow * window , char key , Qt::KeyboardModifiers modifier , int delay )
keyRelease (QWindow * window , Qt::Key key , Qt::KeyboardModifiers modifier , int delay )
mouseClick (QWindow * window , Qt::MouseButton button , Qt::KeyboardModifiers stateKey , QPoint pos , int delay )
mouseDClick (QWindow * window , Qt::MouseButton button , Qt::KeyboardModifiers stateKey , QPoint pos , int delay )
mouseMove (QWindow * window , QPoint pos , int delay )
mousePress (QWindow * window , Qt::MouseButton button , Qt::KeyboardModifiers stateKey , QPoint pos , int delay )
mouseRelease (QWindow * window , Qt::MouseButton button , Qt::KeyboardModifiers stateKey , QPoint pos , int delay )
qWaitForWindowActive (QWidget * widget , int timeout )
qWaitForWindowActive (QWindow * window , int timeout )
qWaitForWindowExposed (QWidget * widget , int timeout )
qWaitForWindowExposed (QWindow * window , int timeout )
touchEvent (QWindow * window , QTouchDevice * device , bool autoCommit )

新全局函数

operator!= (const QMetaMethod & m1 , const QMetaMethod & m2 )
operator+ (const QPointF & point )
operator+ (const QPoint & point )
operator== (const QMetaMethod & m1 , const QMetaMethod & m2 )
qHash (const QHostAddress & key , uint seed )
qHash (ushort key , uint seed )
qHash (ulong key , uint seed )
qHash (uint key , uint seed )
qHash (uchar key , uint seed )
qHash (signed char key , uint seed )
qHash (short key , uint seed )
qHash (quint64 key , uint seed )
qHash (qint64 key , uint seed )
qHash (long key , uint seed )
qHash (int key , uint seed )
qHash (const T * key , uint seed )
qHash (const QTime & key , uint seed )
qHash (const QStringRef & key , uint seed )
qHash (const QString & key , uint seed )
qHash (const QPair<T1, T2> & key , uint seed )
qHash (const QDateTime & key , uint seed )
qHash (const QDate & key , uint seed )
qHash (const QChar key , uint seed )
qHash (const QByteArray & key , uint seed )
qHash (const QBitArray & key , uint seed )
qHash (char key , uint seed )
qHash (QLatin1String key , uint seed )
qHash (const QUuid & uuid , uint seed )
qHash (const QUrl & url , uint seed )
qHash (const QPersistentModelIndex & index , uint seed )
qInstallMessageHandler (QtMessageHandler handler )
qRegisterStaticPluginFunction (QStaticPlugin plugin )
qSetMessagePattern (const QString & pattern )

新宏

新枚举类型

enum BindFlag { DefaultForPlatform, ShareAddress, DontShareAddress, ReuseAddressHint }
enum PauseMode { PauseNever, PauseOnSslErrors }
enum ResourceFileSaveMode { SaveAllResourceFiles, SaveOnlyUsedResourceFiles, DontSaveResourceFiles }
enum Action { CutAction, CopyAction, PasteAction, DeleteAction, ..., FormWindowSettingsDialogAction }
enum ActionGroup { StyledPreviewActionGroup }
enum GlyphRunFlag { Overline, Underline, StrikeOut, RightToLeft, SplitLigature }
enum SocketOption { NoOptions, UserAccessOption, GroupAccessOption, OtherAccessOption, WorldAccessOption }
enum UsagePolicy { NoPolicy, NoBackgroundTrafficPolicy }
enum Feature { Buffering, AlwaysOn, GeoValues, FieldOfView, ..., Reserved }
enum ComponentFormattingOption { PrettyDecoded, EncodeSpaces, EncodeUnicode, EncodeDelimiters, ..., FullyDecoded }

新的 Typedef

新特性

新 QML 类型

新 QML 特性

新 QML 方法

其它 Qt 5 发行的补充