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<td ><a href="index.html">Qt 5.9</a></td><td >What's New in Qt 5.9</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#new-features-in-qt-5-9">New Features in Qt 5.9</a></li>
<li class="level2"><a href="#qt-core-module">Qt Core Module</a></li>
<li class="level2"><a href="#qt-gui-module">Qt GUI Module</a></li>
<li class="level2"><a href="#qt-multimedia-module">Qt Multimedia Module</a></li>
<li class="level2"><a href="#qt-network-module">Qt Network Module</a></li>
<li class="level2"><a href="#qt-qml-module">Qt QML Module</a></li>
<li class="level2"><a href="#qt-quick-module">Qt Quick Module</a></li>
<li class="level2"><a href="#qt-quick-controls-2-module">Qt Quick Controls 2 Module</a></li>
<li class="level2"><a href="#qt-3d-module">Qt 3D Module</a></li>
<li class="level2"><a href="#qt-bluetooth-module">Qt Bluetooth Module</a></li>
<li class="level2"><a href="#qt-charts-module">Qt Charts Module</a></li>
<li class="level2"><a href="#qt-location-module">Qt Location Module</a></li>
<li class="level2"><a href="#qt-nfc-module">Qt NFC Module</a></li>
<li class="level2"><a href="#qt-serialbus-module">Qt SerialBus Module</a></li>
<li class="level2"><a href="#qt-virtual-keyboard-module">Qt Virtual Keyboard Module</a></li>
<li class="level2"><a href="#qt-webengine-module">Qt WebEngine Module</a></li>
<li class="level2"><a href="#qt-websockets-module">Qt WebSockets Module</a></li>
<li class="level2"><a href="#embedded-platforms">Embedded Platforms</a></li>
<li class="level1"><a href="#new-modules">New Modules</a></li>
<li class="level1"><a href="#technology-preview-modules">Technology Preview Modules</a></li>
<li class="level1"><a href="#platform-changes">Platform Changes</a></li>
<li class="level1"><a href="#deprecated-functionality">Deprecated Functionality</a></li>
<li class="level1"><a href="#list-of-api-changes">List of API Changes</a></li>
<li class="level1"><a href="#additions-to-other-qt-5-releases">Additions to Other Qt 5 Releases</a></li>
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<h1 class="title">What's New in Qt 5.9</h1>
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<p>Qt 5.9 is a long-term support (LTS) release.</p>
<a name="new-features-in-qt-5-9"></a>
<h2 id="new-features-in-qt-5-9">New Features in Qt 5.9</h2>
<a name="qt-core-module"></a>
<h3 >Qt Core Module</h3>
<ul>
<li>Added the <code>qfloat16 f</code> and <code>qfloat16 &f</code> overload functions to the QDataStream class for writing a floating point number to the stream and reading it from the stream.</li>
<li>Made the QProcessEnvironment class available on iOS, tvOS, watchOS, and <a href="platform-notes-vxworks.html">VxWorks</a>.</li>
<li>QRegularExpression now requires the PCRE2 library version 10.20, or later. Support for the PCRE1 library was dropped. A copy of PCRE2 is shipped with Qt and will automatically be used on the platforms that lack it.</li>
<li>Added the QOperatingSystemVersion class to provide convenient access to the operating system and version.</li>
</ul>
<a name="qt-gui-module"></a>
<h3 >Qt GUI Module</h3>
<ul>
<li>Made the QPainter class' GL engine functional with core profile OpenGL contexts.</li>
<li>Added the QImage::reinterpretAsFormat() function to change the image format without changing the data.</li>
<li>Added support for <i>compute shaders</i> in QOpenGLShader::ShaderType and QOpenGLShaderProgram also with OpenGL ES 3.1 and newer.</li>
<li>Enabled stem-darkening and gamma-correction on OpenType fonts on platforms that use <a href="qt-embedded-fonts.html#freetype">FreeType</a>, if supported.</li>
</ul>
<a name="qt-multimedia-module"></a>
<h3 >Qt Multimedia Module</h3>
<p>Added the following QML properties:</p>
<ul>
<li>CameraCapture.supportedResolutions</li>
<li>CameraFlash.supportedModes</li>
<li>MediaPlayer.notifyInterval (also for the Audio and Video types)</li>
<li>Video.loops</li>
</ul>
<a name="qt-network-module"></a>
<h3 >Qt Network Module</h3>
<ul>
<li>Added the QNetworkAccessManager::addStrictTransportSecurityHosts() function to support HSTS (HTTP Strict Transport Security) policies.</li>
<li>Added the QNetworkAccessManager::redirectPolicy() function and the QNetworkRequest::RedirectPolicy enumeration to determine whether the Network Access API should automatically follow a HTTP redirect response.</li>
</ul>
<a name="qt-qml-module"></a>
<h3 >Qt QML Module</h3>
<ul>
<li>Added support for ahead-of-time generation of QML type caches.</li>
</ul>
<a name="qt-quick-module"></a>
<h3 >Qt Quick Module</h3>
<ul>
<li>Enabled caching OpenGL shader program binaries used by the Qt GUI module (QPainter's GL paint engine) and the Qt Quick scenegraph on disk to improve application-startup and view-initialization times.</li>
<li>Added an OpenVG backend for Qt Quick.</li>
<li>Enabled making window-screen associations directly from QML by using Window.screen and Qt.application.screens. This enables creating multi-screen aware applications for desktop and embedded without involving C++ code.</li>
<li>Added a way to query information about the font actually used to render a <a href="whatsnew50.html#text">Text</a> type.</li>
<li>Added an image provider that can share decoded image data and memory between processes.</li>
</ul>
<a name="qt-quick-controls-2-module"></a>
<h3 >Qt Quick Controls 2 Module</h3>
<ul>
<li>Introduced new QML types: DelayButton, ScrollView.</li>
<li>Added multi-touch support.</li>
<li>Made the ComboBox type editable.</li>
<li>Added the interactive property for making a Drawer type non-interactive and persistent.</li>
<li>Enabled live value updates (by default) for the Slider, RangeSlider, and Dial types.</li>
<li>Added dedicated notification signals for user interaction: AbstractButton::toggled(), Slider::moved(), SpinBox::valueModified(), and so on.</li>
<li>Enabled incremental discrete scrolling with the ScrollBar type.</li>
<li>Added enabling and disabling the swipe for the SwipeDelegate type. In addition, the swipe can now be opened programmatically.</li>
<li>Added support for the vertical orientation to the SwipeView.orientation property.</li>
</ul>
<a name="qt-3d-module"></a>
<h3 >Qt 3D Module</h3>
<ul>
<li>Added rendering Qt Quick 2 scenes to a texture and interacting with them within a 3D world.</li>
<li>Added a Technical Preview of a new animation subsystem that enables non-blocking, keyframe animations on the threadpool and exporting from animations from Blender.</li>
<li>Added Physics Based Rendering (PBR) material (QMetalRoughMaterial and QTexturedMetalRoughMaterial) to Qt3DExtras for improved appearance when used with environment maps.</li>
<li>Added 3D text support to Qt3DExtras.</li>
<li>Added the LevelOfDetail type to control the representation of an entity based on distance from the observer or size on the screen. It comes with a convenience loader class that loads different QML files.</li>
<li>Made the Mesh type plugin based. It comes with plugins for the Wavefront OBJ, PLY and FBX formats and makes it easy to add other formats.</li>
<li>Added distance field based 2D textured text that can be freely rotated but is based on planar geometry.</li>
</ul>
<a name="qt-bluetooth-module"></a>
<h3 >Qt Bluetooth Module</h3>
<ul>
<li>Added Classic Bluetooth support for <a href="build-sources.html#winrt">WinRT</a>.</li>
<li>Added Bluetooth LE Peripheral support for Android.</li>
</ul>
<a name="qt-charts-module"></a>
<h3 >Qt Charts Module</h3>
<ul>
<li>Added support for minor grid lines for logarithmic axes.</li>
<li>Added options for legend marker shapes to QLegend::MarkerShape.</li>
<li>Added support for adding more than one bar series to a chart.</li>
</ul>
<a name="qt-location-module"></a>
<h3 >Qt Location Module</h3>
<ul>
<li>Added support for rotating and tilting maps.</li>
<li>Added touch gestures for rotating and tilting maps.</li>
<li>Improved support for stacking multiple Map types.</li>
<li>Added the MapCopyrightNotice type to flexibly position the copyrights of multiple map elements on top.</li>
<li>Enabled styling the HTML copyright using CSS.</li>
<li>Added support for handing the rendering of map items to the plugin.</li>
<li>Added the <i>MapboxGL</i> plugin that is based on the <code>mapbox-gl-native</code> mapping engine.</li>
<li>Added the Map::fitViewportToVisibleMapItems() method to only consider visible items when fitting the viewport.</li>
<li>Added the MapItemGroup type to combine multiple map items in a separate QML file.</li>
<li>Added the Map.fieldOfView property to control the camera's field of view when the map is tilted.</li>
<li>Added the MapParameter type to expose and control plugin-specific runtime functionality.</li>
</ul>
<a name="qt-nfc-module"></a>
<h3 >Qt NFC Module</h3>
<ul>
<li>Enabled using NFC when running as an Android service.</li>
<li>Added support for communicating with ISO-DEP, NFC-A, NFC-B, NFC-F, and NFC-V tags or smartcards, such as the German eID card, using QNearFieldTarget::sendCommand() on Android.</li>
</ul>
<a name="qt-serialbus-module"></a>
<h3 >Qt SerialBus Module</h3>
<ul>
<li>Added the CAN FD Bitrate Switch (BRS) and Error State Indicator (ESI) flags to QCanBusFrame (QCanBusFrame::hasBitrateSwitch() and QCanBusFrame::hasErrorStateIndicator()).</li>
<li>Added QCanBusDeviceInfo for information about available CAN interfaces.</li>
<li>Added a plugin to support SYS-TEC electronic CAN adapters on Windows.</li>
</ul>
<a name="qt-virtual-keyboard-module"></a>
<h3 >Qt Virtual Keyboard Module</h3>
<ul>
<li>Added support for selection handles for the dedicated (desktop) keyboard.</li>
<li>Changed the behavior of the shift handler to only activate caps lock if the shift key is double-clicked.</li>
<li>Added support for external keyboard layouts, which allows overriding and exclusion of the built-in keyboard layouts.</li>
<li>Added a language selection popup for faster selection of the input language.</li>
<li>Added support for the automatic selection of the only remaining word in the suggestion list.</li>
<li>Made the word candidate list automatically hidden when inactive.</li>
<li>Added full screen input mode.</li>
</ul>
<a name="qt-webengine-module"></a>
<h3 >Qt WebEngine Module</h3>
<ul>
<li>Based on Chromium 56.</li>
<li>Switched internally to the new Chromium build-system GN.</li>
<li>Added loading with HTTP POST.</li>
<li>Added support for user scripts with QQuickWebEngineProfiles and for using QQuickWebEngineUserScripts from C++.</li>
<li>DownloadItems now get a reason when they are interrupted or fail.</li>
</ul>
<a name="qt-websockets-module"></a>
<h3 >Qt WebSockets Module</h3>
<ul>
<li>Added support for handling external QTcpSocket objects.</li>
</ul>
<a name="embedded-platforms"></a>
<h3 >Embedded Platforms</h3>
<ul>
<li>Added experimental DRM dumb buffer support to the <code>linuxfb</code> platform plugin, to help devices that do not support the deprecated <code>fbdev</code> model (or have problems with <code>fbdev</code> emulation).</li>
<li>Added support for filtering and prediction of touch events to the <code>evdevtouch</code> plugin.</li>
</ul>
<a name="new-modules"></a>
<h2 id="new-modules">New Modules</h2>
<ul>
<li>Qt Gamepad - Enables Qt gaming applications to respond to gamepad input.</li>
</ul>
<p>This module was previously released as a technology preview and is now a fully supported Qt add-on module.</p>
<a name="technology-preview-modules"></a>
<h2 id="technology-preview-modules">Technology Preview Modules</h2>
<ul>
<li>Qt Network Authorization - Online authorization support with OAuth protocol, versions 1 and 2.</li>
<li>Qt Remote Objects - Sharing QObject interfaces (signals, slots, and properties) between processes or devices,</li>
<li>Qt Speech - Text to speech and speech recognition functionality. Currently only the text to speech features are released. Includes backends for several speech synthesizers on Windows, Linux, macOS, and Android.</li>
</ul>
<a name="platform-changes"></a>
<h2 id="platform-changes">Platform Changes</h2>
<ul>
<li>Removed support for <a href="build-sources.html#winrt">WinRT</a> on Windows 8.1.</li>
<li>Debug builds on GCC platforms now use <code>-Og</code> optimizations by default. This can be disabled with the configure flag <code>-no-optimize-debug</code>.</li>
</ul>
<a name="deprecated-functionality"></a>
<h2 id="deprecated-functionality">Deprecated Functionality</h2>
<ul>
<li>Qt Script</li>
</ul>
<p>Deprecated modules are still included in Qt 5.9, but are considered for removal in future releases.</p>
<a name="list-of-api-changes"></a>
<h2 id="list-of-api-changes">List of API Changes</h2>
<p>The pages below contain a list of API changes in Qt 5.9:</p>
<ul>
<li><a href="newclasses59.html">New Classes and Functions in Qt 5.9</a></li>
<li><a href="obsoleteclasses.html">Obsolete Classes</a></li>
</ul>
<a name="additions-to-other-qt-5-releases"></a>
<h2 id="additions-to-other-qt-5-releases">Additions to Other Qt 5 Releases</h2>
<ul>
<li><a href="whatsnew58.html">What's New in Qt 5.8</a></li>
<li><a href="whatsnew57.html">What's New in Qt 5.7</a></li>
<li><a href="whatsnew56.html">What's New in Qt 5.6</a></li>
<li><a href="whatsnew55.html">What's New in Qt 5.5</a></li>
<li><a href="whatsnew54.html">What's New in Qt 5.4</a></li>
<li><a href="whatsnew53.html">What's New in Qt 5.3</a></li>
<li><a href="whatsnew52.html">What's New in Qt 5.2</a></li>
<li><a href="whatsnew51.html">What's New in Qt 5.1</a></li>
<li><a href="whatsnew50.html">What's New in Qt 5.0</a></li>
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