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  2. Qt 6.10.1
  3. Qt 6 的新功能
  4. Qt 6.9 的新功能

Qt 6.9 的新功能

New Features in Qt 6.9

Qt Core 模块

Qt Graphs 模块

  • Added transparency support to Surface3D , utilizing order-independent transparency from QtQuick3D . Only approximate technique (WeightedBlended) has been implemented to QtQuick3D this far, so no accurate techniques can be used yet.
  • 添加 rootNode to allow injecting graphs to a View3D in QtQuick3D 应用程序。
  • Added another picking method, doRayPicking , to be used with View3D graph injections.
  • 添加 QSpline3DSeries class to allow users render their data in splines.
  • 添加 valueColoringEnabled 特性到 Bars3D , which allows each bar to be colored separately based on its value.
  • 添加 scaleLabelsByCount 特性到 QAbstract3DAxis , allowing users to define whether axis labels should be scaled based on the total amount of labels.
  • 添加 labelSize 特性到 QAbstract3DAxis , allowing users to set the sizes of axis labels by each axis.
  • Added support for setting the minimum and maximum rotations in X and Y directions to Bars3D , Scatter3D ，和 Surface3D .
  • 添加 alignment 特性到 QAbstractAxis , allowing users to align axes left, right, top, or bottom.
  • Added plotArea property to QGraphsView, allowing users to define the rectangle a graph will be drawn in.
  • Added zooming and panning support to QGraphsView.
  • Added custom input handling support to area, line, pie, and scatter graphs.

Qt GRPC 模块

  • Added the Qt GRPC Client Guide overview example.
  • Improved and refined all documentation and examples.
  • Optimized streaming RPCs for writing under high load.

Qt GUI 模块

  • QBrush and QPen got optimized operators for comparing with or assigning from color and style values.
  • QPainter::setBrush () got new optimized overloads for setting a color as a solid brush.
  • QPainterStateGuard is a new RAII class to ensure balanced save/restore operations on a QPainter .
  • QColorSpace got APIs for setting and getting the four primary color space points.
  • 添加 Qt::ExpandedClientAreaHint to request that the window's client area is expanded to areas where it might be obscured by, or conflicting with other UI elements, such as the window's titlebar controls or other system UIs.
  • 添加 Qt::NoTitleBarBackgroundHint to request that the window's title bar is drawn without a background color.
  • 添加 QWindow::safeAreaMargins () to reflect the safe area of the window.
  • Added parsing and automatic detection of emoji sequences in text, ensuring the use of color fonts when needed as according to the Unicode specification. This parser can be disabled per layout using QTextOption::DisableEmojiParsing , or by disabling the emoji segmenter when configuring Qt.
  • 添加 QFontDatabase::addApplicationEmojiFontFamily () and related functions for customizing the default emoji font used by the application.
  • 添加 QFontInfo::variableAxes () for retrieving information about the variable axes supported by a font.
  • QImage::flipped () 和 QImage::flip () provide a Qt::Orientation based API for flipping an image, making code easier to read than the bool- based QImage::mirrored () alternative.
  • QRhi : when running with OpenGL ES on mobile GPUs with support present, GL_EXT_multisampled_render_to_texture is utilized whenever possible. For clients such as Qt Quick and Qt Quick 3D this potentially brings significant performance improvements in multisampled rendering on tiled GPU architectures.
  • QRhi : On Windows with Direct 3D 11 and 12, QWindow update requests are now driven by a dedicated vblank watcher thread, reducing CPU load and latency. This means that clients such as Qt Quick are expected to have a reduced lag when interactively dragging items by mouse or touch for example.
  • QRhi : Added support for variable rate shading, where applicable (Direct 3D 12, Vulkan, Metal). This enables dynamic foveation support with Qt Quick 3D XR on visionOS.
  • QRhi : Per-render target blending is now optionally supported for OpenGL as well.
  • QRhi : Added support for a number of integer and depth texture formats.
  • QRhi : Added support for passing in application-provided wait/signal semaphores when on Vulkan. These are then passed on to to vkQueueSubmit and Present, thus allowing integration of external rendering/compute engines that rely on multiple threads and require appropriate synchronization with the scenegraph renderer.
  • 使用 QPdfWriter::author () property to set the author of the generated PDF document.

Qt HttpServer 模块

Qt Multimedia 模块

Qt Network 模块

Qt Network Auth Module

Qt Protobuf 模块

  • Improved and refined all documentation.
  • 添加 HEADER_GUARD option to specify the mechanism used to guard generated header files.
  • 添加 protobuf-unsafe-registry feature to trade safety for performance on accessing custom protobuf serializers.

Qt QML 模块

  • QML Language Server now provides an outline view of the document structure. This allows clients (e.g., IDEs or code editors) to represent a qml document’s structure as an interactive outline, displaying objects, properties, methods and other code elements in a hierarchical view.
  • Added the maximum line length feature to qmlformat: qmlformat now controls where to break lines based on a maximum allowed line length, ensuring a consistent and readable QML document.

Qt Quick 模块

  • 添加 SafeArea attached property to manage safe areas of an Item or Window.
  • Added Shear component for a convenient way of applying shearing transforms to items.
  • 添加 FontMetrics::capitalHeight property, which was previously missing from the Qt Quick API.
  • 添加 FontInfo type for retrieving the results of font resolution, matching the QFontInfo class in C++.
  • Reintroduced support for the FramebufferObject rendering mode of QQuickPaintedItem when the graphics API in use is OpenGL. This is provided as a porting aid for Qt 5 era applications that require the use of QPainter 's legacy OpenGL paint engine for their QQuickPaintedItems.
  • Optimized the scenegraph renderer's buffer pooling logic to prevent spikes in memory usage in scenes with large geometries. Additionally, there is a reduction in overhead for scenes with a lot of items, in particular when running with OpenGL.

Qt Quick Controls 模块

  • 添加 ContextMenu . This can be attached to any item in order to show a context menu upon a platform-specific event, such as a right click or the context menu key.

Qt Quick Effects Module

  • New RectangularShadow element for fast rounded rectangle shaped shadow/glow. The API is similar to CSS box-shadow, with color, offset, spread and blur values.

Qt Quick 3D 模块

  • Added WeightedBlended Order Independent Transparency (OIT) implementation for rendering transparent objects.
  • Added support for 32-bit unsigned integer texture formats.
  • Improved control over shadow map bounds for instancing models, potentially allowing for better performance when calculating becomes expensive.
  • Added support for 4K shadow maps with a new 'Ultra' resolution setting.
  • Added the option of forcing medium precision for floats in GLSL ES fragment shaders. Provided mainly as a tool for performance tuning. Set the environment variable QT_QUICK3D_MEDIUM_PRECISION to a non-zero value. Has no effect on other kinds of shaders (and that includes non-ES GLSL too).
  • DebugView now supports visualizing bounds for point light shadows.
  • Ported the built-in geometries from Qt 3D to QtQuick3D .Helpers. PlaneGeometry , SphereGeometry , CylinderGeometry , ConeGeometry ，和 TorusGeometry are now available in QtQuick3D .Helpers.
  • Added a port of the ExtrudedTextMesh from Qt 3D to QtQuick3D .Helpers.
  • Added support for using instancing with custom materials in the material editor.

Qt Quick 3D XR 模块

  • Added support for haptic output with controllers using amplitude, duration, and frequency through a new XrHapticFeedback 项。
  • Added new property in XrInputAction to conditionally disable an action without having to test for it in all the handler functions.
  • Added Metal backend for OpenXR to support running in Meta XR Simulator on macOS.
  • The property multiViewRenderingEnabled is now read-only and toggling multiview rendering is no longer possible at run-time. If multiview rendering is supported, it is enabled for the lifetime of the application. In porting situations, where multiview rendering is not desired, it can be disabled by setting the environment variable QT_QUICK3D_XR_DISABLE_MULTIVIEW to a non-zero value.

Qt Quick VectorImage 模块

  • Added preliminary support for color animations and transform animations, matching the current support in Qt Svg.

Qt Sql 模块

Qt SVG 模块

  • Added three new values to QtSvg::Options to disable animations.
  • Support CSS animation for fill, stroke, and transform properties.

Qt VirtualKeyboard 模块

  • Added a new Japanese layout which uses flick keys.
  • Added support for adjusting key sound volume.

Qt WebEngine 模块

Qt Widgets 模块

Qt XML 模块

工具

QDoc 文档编制生成器

  • QDoc now accepts formatting commands in macro arguments.
  • Authors can now override the underlying return type of a function that's documented with an fn -command with auto .
  • QDoc can now generate documentation from comments in C++ headers. This is added as a technical preview in QDoc with Qt 6.9, and we'd love to get feedback from our users. Enable the documentationinheaders QDoc configuration variable to try it out.
  • QML enumeration documentation can be generated from C++ enumerations with the new qmlenumeratorsfrom 命令。
  • The generatelist and annotatedlist commands now support custom sort order for the generated lists.
  • 弃用 accepts future versions, and QDoc generates appropriate text when it recognizes a version as being in the future.
  • Clang library requirements: QDoc requires Clang libraries from LLVM 17. It's also confirmed to work with Clang libraries from LLVM 18, 19, and 20.
  • QDoc now supports adjusting the CMake requisites for third-party projects with the cmakecomponent , cmakepackage ，和 cmaketargetitem 命令。
  • Example-related warnings are now configurable through the new examples.warnaboutmissingimages and examples.warnaboutmissingprojectfiles configuration variables.
  • QDoc can now generate tooltips for images in your documentation. The documentation for the new usealttextastitle configuration variable describes how to enable this for your project.

平台的变化

构建系统变化

  • Building Qt and using Qt in CMake projects now requires CMake version 3.22 or later.

桌面平台

Windows

  • 添加新的公共 CMake API：
  • Added support for rendering additional emoji font formats, such as CBDT and COLRv1.

Linux 中的 Wayland 客户端

  • Added support for the new xdg-toplevel-icon-v1 protocol to make QWindow::setIcon () work if the compositor supports this protocol as well.
  • The underlying wl_surface of a window now shares its lifetime and is no longer destroyed when the window is hidden.

移动平台

Android

  • Support uncompressed native libs within APKs and remove the need for packagingOptions.jniLibs.useLegacyPackaging true .
  • Introduce qt_add_android_permission () CMake function.
  • 添加 QT_ANDROID_COMPILE_SDK_VERSION CMake property to set the SDK level for building Java code.
  • 添加 QT_ANDROID_APP_ICON CMake property to set an app's icon.
  • 添加 QT_ANDROID_APP_NAME CMake property to set an app's name.
  • Decouple location and bluetooth permissions for API level 31+.
  • Allow setting a maximum for queued background UI events.
  • Add script to easily deploy, run apps and get logs from terminal.
  • Qt Quick for Android and QtQuickView:
    • Add setData() and dataChanged() methods to QtAbstractItemModel.
    • Add OnDataChangedListerner callback interface.
    • QtQuickViewContent: Add onStatusChanged() overload that passes the underlying QtQuickViewContent object.
    • Support multiple embedded views from an Android Service.

嵌入式平台

Boot to Qt

RealTime OSs

  • RealTime OS support is provided only for LTS releases. For non-LTS releases, support is available exclusively through Professional Services.

API 变化列表

These pages contain an overview of API changes in Qt 6.9:

内容

  1. New Features in Qt 6.9

  2. Qt Core 模块

  3. Qt Graphs 模块

  4. Qt GRPC 模块

  5. Qt GUI 模块

  6. Qt HttpServer 模块

  7. Qt Multimedia 模块

  8. Qt Network 模块

  9. Qt Network Auth Module

  10. Qt Protobuf 模块

  11. Qt QML 模块

  12. Qt Quick 模块

  13. Qt Quick Controls 模块

  14. Qt Quick Effects Module

  15. Qt Quick 3D 模块

  16. Qt Quick 3D XR 模块

  17. Qt Quick VectorImage 模块

  18. Qt Sql 模块

  19. Qt SVG 模块

  20. Qt VirtualKeyboard 模块

  21. Qt WebEngine 模块

  22. Qt Widgets 模块

  23. Qt XML 模块

  24. 工具

  25. QDoc 文档编制生成器

  26. 平台的变化

  27. 构建系统变化

  28. 桌面平台

  29. 移动平台

  30. 嵌入式平台

  31. API 变化列表