Qt 5.8 Beta 版发布了，主要更新内容如下： New Features (within existing modules) Qt Core Qt GUI QTouchEvent now has uniqueId and rotation Support for dithering when converting to all QImage formats Previously private QOpenGLTextureBlitter API is made public, to help QtWayland in particular Added capHeight() to QFontMetrics, QFontMetricsF, and QRawFont Selection handles on Android, with edit menu for copy/paste)
Qt Quick Refactored
the Qt Quick scene graph to remove its OpenGL dependency and make it
possible to create rendering backends based on other graphics APIs, such
as Vulkan or Direct3D. Integrated the software renderer
for the Qt Quick scene graph as a proper backend for the scene graph
(previously known as the Qt Quick 2D Renderer.) Implemented
support for partial updates in the software backend for the scene graph
(2D Renderer) to prevent expensive fullscreen updates when only small
areas are changing. Added an experimental Direct3D 12 backend Implemented
caching of code and data structures generated from .qml/.js files to
disk to reduce start-up time and memory consumption. The resulting .qmlc
and .jsc cache files are memory mapped. Cleaned up touch
and mouse event delivery and added a new internal class
QQuickPointerEvent which is used for that purpose. This is the
foundation for further improvements with regards to input event
handling, but does not affect any code using Qt Quick yet.
Qt Quick Controls 2 Added new QML types: Dialog, DialogButtonBox, MenuSeparator, RoundButton, and ToolSeparator Added ripple effects to the Material style Added hover effects to the Material and Universal styles Added a 'System' theme to the Material and Universal styles Added
new experimental "platform" QML types: MenuBar, Menu, SystemTrayIcon,
ColorDialog, FontDialog, MessageDialog, FileDialog and FolderDialog
Qt Widgets Qt WebEngine Based on Chromium 53 Windows: Requires MSVC 2015 Update 2 or later view-source: scheme is supported Spellchecking with Hunspell Tooltips (HTML5 global title attribute) are now also supported in the QML API. User scripts now support metadata (@include, @exclude, @match) Qt WebEngine (QML) allows defining custom dialogs / context menu's Qt WebEngine (QML) on eglfs uses builtin dialogs based on Qt Quick Controls 2 Support for printing Added setting to enable printing of CSS backgrounds Some chrome: schemes now supported, for instance chrome://gpu
Qt Bluetooth Qt Multimedia Added
QAudio::convertVolume() (and matching QML API) function to convert an
audio volume from one scale to another, e.g. logarithmic to linear. VideoOutput (QML) now supports rendering YUV 4:2:2 (YUYV, UYVY) video frames. GStreamer backend (Unix) now supports video probing on QCamera
Qt Network Support for TLS PSK ciphersuites on server side Support for configurable diffie hellman parameters Support for HTTP/2 in Network Access Manager
Qt WebSockets Qt Charts Qt 3D Main focus on maturation (improving performance, bug fixing and improving test coverage) Paint to texture using QPainter from Weiland Optional support for issuing commands to Qt3D aspects (e.g. from profiler) (Screenshot framegraph node STILL UNDER REVIEW)
Embedded platforms Enhanced multi-screen capabilities and configurability with eglfs when running on KMS/DRM, both with GBM and EGLDevice/Stream Added support for 90 or 180 degrees rotation of software-rendered content (QWidget) in eglfs
Configurability (Qt Lite project) Qt
5.8 comes with a rewritten configuration system, that allows for easy
customisation of your Qt build. The main focus of this feature is for
the Device Creation, but it can also be used to tailor a Qt build for
mobile or desktop. The system allows removing individual pieces of
functionality and APIs from Qt, thus creating a more lightweight set of
libraries for deployment. New Modules Qt Wayland Compositor Qt SCXML Qt Serial Bus
New Platforms Technology Preview Modules Qt Gamepad (TP2) Qt
Speech - A module to make text to speech and speech recognition easy.
For Qt 5.8 (and probably even the next few releases) only the text to
speech part is released. It has backends for several speech synthesizers
on macOS, Android, Windows and Linux currently. Qt Network Authentication - currently includes support for OAuth 1 + 2
Deprecated Modules The following modules are part of Qt 5.8 release, but deprecated and considered for removal in subsequent releases of Qt: Removed Modules Configurations 点此查看发布说明和完整更新内容
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