Qt for HarmonyOS/Qt5.15.16 Open Source Release for HarmonyOS

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Release Summary

This open-source release officially launches Qt 5.15.16 LTS adapted for HarmonyOS on the tablet an PC, featuring deep adaptation to the HarmonyOS architecture while fully retaining the core capabilities of Qt 5.15.16, including GUI rendering, signal-slot mechanism, cross-platform I/O, network communication and database modules. This release reduces cross-platform porting costs for developers, accelerates the integration of Qt and HarmonyOS ecosystems, and empowers efficient development of multi-scenario HarmonyOS applications.

License Statement for the Qt 5.15.16 source code adapted for HarmonyOS released this version is as follows:

• The license terms for the original Qt 5.15.16 source code remain unchanged. For details, please refer to: https://doc.qt.io/archives/qt-5.12/licensing.html
• The newly added code for HarmonyOS adaptation is licensed under both commercial license and LGPL v3 open source license.
• Please refer to license claim in the header comments of source code for specifics.

Release versions

Please refer to the table below about the release information of Qt5.15.16 HarmonyOS open source package, :

Package Name	Download Link	Sha	HarmonyOS Version	Release Notes
qt-harmonyos-src-5.15.16-20260930	HarmonyOS: https://download.qt.io/snapshots/qt/qt-for-harmonyos/5.15.16/qt-harmonyos-src-5.15.16-20260930.tar.xz Windows: https://download.qt.io/snapshots/qt/qt-for-harmonyos/5.15.16/qt-harmonyos-src-5.15.16-20260930.zip Mac&Linux: https://download.qt.io/snapshots/qt/qt-for-harmonyos/5.15.16/qt-harmonyos-src-5.15.16-20260930.tar.xz	408c38832b9b	API 20+	Click here

Release Notes Details

qt-harmonyos-src-5.15.16-20260930

• QTFOROH-1365: Add native OHOS platform support, including the ohos-clang mkspec, qmake environment variable expansion and 64-bit atomics in bootstrap
• QTFOROH-1497: Drop the per-insert changeSelection autocorrection hack from input method handling
• QTFOROH-2084: Add distributed data object (DDO) API for app continuation, with file assets and the DISTRIBUTED_DATASYNC permission
• QTFOROH-2089: Make QOhosSettings a lazy singleton
• QTFOROH-2157: Relax the device guards on setWindowLimits() and setWindowShadowRadius()

• QTFOROH-2166: Fix blurry file icons by scaling the file icon SVG at the requested size
• QTFOROH-2193: Attach and detach the input method context on ArkUI node focus changes
• QTFOROH-2257: Fix the lower output range bound for signed sensors
• QTFOROH-2258: Provide the IME with the text left and right of the cursor
• QTFOROH-2259: Fix hover event generation
• QTFOROH-2265: Trigger the long-press context menu for pen tool events
• QTFOROH-2270: Report global positions for non-client area events and fix cross-screen window content rescaling
• QTFOROH-2277: Honor the setPreviewText range in input method preview handling
• QTFOROH-2279: Introduce the "need soft keyboard" Huawei patch
• QTFOROH-2282: Notify the IME of selection changes with the whole editor text and provide the text index at the cursor from the Qt side
• QTFOROH-2283: Fix a maximized window landing on the wrong screen
• QTFOROH-2288: Derive the window fixed-size state from size hints instead of a dedicated QPA function
• QTFOROH-2289: Define the QOhosUdsMeta static constexpr members
• QTFOROH-2290: Fix the selection change notification for an empty editor
• QTFOROH-2295: Report text changes to the accessibility service
• QTFOROH-2296: Fix a use-after-free in accessibility element info
• QTFOROH-2310: Check the WiFi permissions before calling into wifiManager
• QTFOROH-2311: Support enum variants for newer API versions in qohosenumsgen.py
• QTBUG-144929: Stop passing const objects to QObject::disconnect()
• QTBUG-146769: Use point size instead of pixel size for the QGroupBox widget
• QTBUG-146821: Register the @ohos.net.connection JS module, add its enums and the QNapi getFilteredArrayElements() helper
• QTBUG-146891: Fix a crash on environment callback unregistration
• QTBUG-147333: Add icons to system tray menu items
• QTBUG-147335: Guard update() against a missing focus object
• QTBUG-147393: Remove std exception use from the OHOS plugin, aborting or reporting errors explicitly instead
• QTBUG-147399: Consolidate the OHOS enums into qohosenums.h and add a generator script for it
• QTBUG-147401: Set the Qt thread default stack size to 8 MiB
• QTBUG-147409: Fix QNapi Buffer/TypedArray detection, empty input handling and functor/context lvalue handling
• QTBUG-147485: Set ActiveWindowFocusReason on window activation
• QTBUG-147543: Replace QOhosOptional with optional-lite's nonstd::optional across all OHOS plugins
• QTBUG-147552: Force-resolve pending window destroy promises when Qt main() exits
• QTBUG-147641: Ignore an invalid rect in tablet screen rotation detection
• QTBUG-147695: Keep embedded child windows Qt-authoritative
• QTBUG-147720: Adopt the JsScopeData pattern for clipboard and system tray JS state, and document it
• QTBUG-147740: Stop overriding the QGroupBox title alignment
• QTBUG-147756: Exclude OHOS from the QTest perf-events benchmark backend
• QTBUG-147819: Work around the UDMF eager provider call on empty records
• QTBUG-147896: Fix embedded view input focus and IME cursor rectangle positioning on focus object changes
• QTBUG-147959: Clamp backing store blits to the destination buffer
• QTBUG-148052: Fix the window position after destroy() and recreation
• QTBUG-148185: Store QOhosView::ViewType as a structural role and check the proxy where code relied on its type fallback
• QTBUG-148227: Fix a buffer leak in callOhFileUriConversionFunc()
• QTBUG-148234: Fix fullscreen windows landing on the wrong screen in multi-screen setups
• QTBUG-148259: Stop reporting a hide()-issued minimize as Qt::WindowMinimized
• QTBUG-148264: Derive the application state from the OHOS lifecycle and stop reporting Qt::WindowActive as a window state
• QTBUG-148267: Report the user-set printer alias as the print device name
• QTBUG-148273: Keep Qt's focus while another of our windows holds it and report MultipleWindows only in free-window mode
• QTBUG-148346: Derive the application state from the OHOS lifecycle
• QTBUG-148367: Prefer QNapi Object::eval() over call()
• QTBUG-148419: Fix a crash when handling IME cursor movement
• QTBUG-148420: Preserve combined window states
• QTBUG-148469: Preserve the original system tray icon colors instead of forcing grayscale in the PC status bar
• QTBUG-148510: Stop passing the launch URI as an application argument
• QTBUG-148544: Promote non-client area touch to mouse events
• QTBUG-148547: Deliver window activation dropped by a modal blocker
• QTBUG-148549: Route minimize(), recover() and setFullScreen() through flushedWindowProxyOrNull()
• QTBUG-148571: Drop stale touch move events instead of individual touch points and treat native zoom/rotation values as incremental deltas
• QTBUG-148752: Add a HarmonyOS Symbol icon engine and unify QIcon theme icon loading with cache invalidation on theme changes
• QTBUG-148817: Stop reporting ApplicationHidden before any window is exposed
• QTBUG-148993: Skip resizeAsync() when the window size is unchanged
• QTBUG-149105: Fix a crash when a native sub-window cannot use SessionManager
• QTBUG-149294: Map the right Alt key to Qt::Key_Alt
• QTBUG-149323: Advertise and deliver URLs for native hyperlink drags and drop the synthesized text/plain entry
• QTBUG-149334: Forward native gestures from the touchpad only and treat native zoom/rotation values as incremental deltas
• QTBUG-149374: Populate applicationVersion() from the bundle versionName
• QTBUG-149381: Fix a drag crash on a null QImage payload
• QTBUG-149448: Resolve the QMenuBar screen geometry mismatch when placing popups
• QTBUG-149835: Take a QAbility throughout the JsState APIs and handle a missing UIAbility explicitly instead of relying on QAbilityPeer fallbacks
• QTBUG-149899: Handle the JS promises in QOhosWindowProxy
• QTBUG-149934: Isolate generated enums per module and move the QPA enums to QtOhosQpa::enums