What's New in Qt 6.1
New and Restored Modules in Qt 6.1
Qt 6.1 adds the following modules:
Active Qt Module
Active Qt
provides ActiveX and COM support that lets Qt for Windows developers:
-
在 Qt 应用程序中访问和使用由任何 ActiveX 服务器提供的 ActiveX 控件和 COM 对象。
-
使 Qt 应用程序可用作 COM 服务器，采用任意数量 Qt 对象和小部件作为 COM 对象和 ActiveX 控件。
Qt Charts 模块
Qt Charts
still supports only OpenGL for accelerated series (
AbstractSeries
.useOpenGL). Such series will not render in Qt Quick if another graphics API is used for rendering.
Qt Data Visualization Module
Qt Data Visualization
only supports the OpenGL RHI backend, and requires setting of the environment variable
QSG_RHI_BACKEND
to
opengl
. This can either be done at the system level, or defined in the application's
main()
with
qputenv("QSG_RHI_BACKEND", "opengl");
.
Qt Device Utilities Module
Support for networking functionality only.
Qt Lottie Module
The
Qt Lottie Animation
module has been ported to Qt 6 and the CMake build system.
Qt SCXML and Qt StateMachine
Qt State Machine
contains APIs that were part of Qt Core in Qt 5. The
Qt State Machines
package in the installer contains both the
Qt SCXML
and
Qt State Machine
模块。
Qt Virtual Keyboard 模块
The
Qt Virtual Keyboard
module has been ported to Qt 6 and the CMake build system.
-
A new dictionary manager allows user defined dictionaries (e.g. phone book) to be implemented by the application.
-
There are new properties in
VirtualKeyboardSettings
.
-
Support is added for Cerence Handwriting (T9 Write) and XT9.
New Features in Qt 6.1
Qt Core 模块
-
QFuture
has new convenience functions to create futures in various states and can now invoke its continuation in a context object's thread.
-
qfloat16 can be constructed uninitialized.
-
<QtMath> provides qHypot(), generalising std::hypot() to arbitrarily-many arguments and supporting qfloat16 arguments.
-
Overflow-safe arithmetic is now supported by the functions qAddOverflow(), qSubOverflow(), and qMulOverflow().
-
removeIf() methods and erase_if() support are extended to more classes:
-
QHash
,
QMap
and their Multi variants, whose predicates take either a std::pair or the container's own iterator.
-
QSet
, which also gains an insert() overload that takes (but ignores) a location hint, for compatibility with the standard library.
-
QString
,
QByteArray
and
QList
, which also gain erase() support to remove all instances of a specified value.
-
QVarLengthArray
, along with erase() support and methods removeAll() and removeOne().
-
QStringView
's API now includes count(),
contains()
, indexOf(), lastIndexOf(), constBegin(), and constEnd().
-
QLocale
provides mappings from its enums to ISO codes and back: languageToCode(), scriptToCode(), countryToCode(), codeToLanguage(), codeToScript(), and codeToCountry().
-
QSocketNotifier
now supports more flexible creation.
-
添加
QOperatingSystemVersion::version
(),
QMetaType::hasRegisteredDataStreamOperators
()，和
QUntypedBindable::isReadOnly
(), whose names hopefully say enough.
-
添加
QJniObject
and
QJniEnvironment
as public API (mainly used for Android).
-
Object property bindings have received API refinements, and bindings are added to Qt Core classes - see the
特性绑定
blog post for context.
Qt Gui Module
-
QColorSpace
can now set custom transfer-functions as tables.
-
QTextDocument
now lets you to set a resource provider function, instead of sub-classing
QTextDocument
and overloading loadResource().
-
The Vulkan API wrappers (
QVulkanFunctions
,
QVulkanDeviceFunctions
) now expose the Vulkan 1.1 and 1.2 core APIs as well.
-
With relevant new functionality (supportedApiVersion()) added to
QVulkanInstance
to allow querying the supported instance-level version before instance creation.
-
添加
QPainter::VerticalSubpixelPositioning
hint. This is currently only supported on the Freetype font backend, and when available it will enable subpixel positioning of text in vertical direction at the expense of some memory and additional work. For most use cases, this should be left off, but it can be useful for very specific cases where you want to align painted elements vertically on a dynamically transformed painter.
Qt Network 模块
-
QNetworkCookie
now supports the SameSite feature.
-
引入
QNetworkInformation
:
-
QNetworkInformation
currently exposes the reachability of the system, using system API.
-
Currently supports Darwin, Windows, Android, and NetworkManager on Linux.
-
TLS backends, powering
QSslSocket
and related
QSsl
classes, were converted to plugin-oriented design.
-
Public and private classes in the 'ssl' sub-module of
QtNetwork
are now TLS implementation neutral and are not exposed to low-level APIs/details.
-
Existing TLS-backends (OpenSSL, SecureTransport, Schannel) now report which classes, features and protocols they support.
-
It's possible (for an application, using Qt) to provide its own backend to be used by
QSslSocket
and related classes.
Qt Qml Module
-
添加
QJSPrimitiveValue
and
QJSManagedValue
for a more fine-grained control over JavaScript execution than it was possible with
QJSValue
alone.
-
The qt6_add_qml_module CMake function (still in Tech Preview) adds a qmllint target, which runs qmllint on the target's QML files.
Qt Quick 3D Module
-
Technology preview: "Instanced Rendering", an optimized way of drawing multiple instances of the same objects with different transformations. This feature is considered feature-complete, but may still undergo minor API changes based on user feedback. It is planned for finalization in Qt 6.2.
-
Technology preview: 3D Particles, an API for adding particle effects to 3D scenes. This API is ready for testing, but is not yet feature-complete.
-
Qt Quick 3D now supports morph target animations, i.e. animations where all vertices interpolate between two sets of positions, giving the impression that one shape is morphing into another.
Qt 5 Compatibility Module
While Qt Graphical Effects does not ship with Qt 6, a number of effects have been ported to the new graphics architecture and added to the Qt5Compat module. For example, to gain access to
DropShadow
, add the QML import
Qt5Compat.GraphicalEffects
. Some complex effects that rely on dynamic shader generation, such as a number of blur variants, have been removed.
API 变化列表
These pages contain an overview of API changes in Qt 6.1:
