Qt Quick Ultralite maintains source compatibility between minor releases. However, some changes may require you to adapt the application code accordingly. The following sections highlight such changes:

Important changes

• Ported the platform exporter Python script to be a native application.
• Replaced BoardDefaults.cmake with BoardDefaults.qmlprojectconfig. See Migration Guide.

New features

• Added the boundsBehavior property to control the dragging or flicking beyond the bounds.
• Added support for building Qt Quick Ultralite applications using MinGW v11.2 on Windows
• Optimized QML binding evaluation to reduce code size by up to 2.5% depending on the toolchain and the application.
• Added support for AutomaticCompressedLossless image format on Cypress Traveo II.
• Upgrades:
  • Renesas FSP v3.8.0.
  • MCUXPresso SDK v2.12.0 for MIMXRT1050, MIMXRT1060, MIMXRT1064, and MIMXRT1170.
  • STM32CubeH7 SDK v1.10.0 for STM32H750.
  • STM32CubeF7 SDK v1.17.0 for STM32F769.
  • STM32CubeF4 SDK v1.27.0 for STM32F469.
  • LodePNG version to 20220109.
  • CMake minimum version to v3.21.1.
• Added the DeviceLink platform API to enable communication between the host and the device.
• Added EventQueue::isOverrun() and EventQueue::clearOverrun() to check if the event queue is overrun and clear it.
• Added FreeRTOS support for EK-RA6M3G.
• Added .qmlproject files to all the Qt Quick Ultralite demos and examples.
• Added support for images with unicode filenames.
• Updates to Flickable:
  • Added animation for the boundsBehavior when an item is flicked over bounds.
  • Added the flickableDirection property to control the flick direction.
• Added partial framebuffer support for STM32F469 and STM32F769.
• Added support for RK043FN66HS-CTG display on MIMXRT1050, MIMXRT1060 and MIMXRT1064 boards.
• Added the compiler and linker-specific options to a whitelist, enabling platform exporter to filter them from the options retrieved by CMake. These white-listed options are required to be set by the 3rd party IDEs.
• Added Loader QML API to support loading QML components dynamically.
• Added support for the updated display panel in the STM32F769I Discovery kit.
• qmlprojectexporter updates:
  • Override the Qt Controls style using the --controls-style command-line option.
  • Detect an SVG image.
  • Select resource variants using file selectors.
  • Generate dependency resolution report.
  • Validate custom image properties.
  • Run in both configure and generate modes using the --export-configuration and --export-cpp command-line options.
  • Handle the IAR toolchain-specific needs to use the module assets.
  • Override the projectRootPath property.
  • Export modules using the --export-modules command-line option, which is enabled by default.
  • Improve error reporting to ensure that the messages help the developer resolve the error.
  • Add compiler and linker option white list.
  • Update the filename naming scheme to match with the scheme used by qmltocpp.

Fixed issues

Qt for MCUs v2.3.1

• Fixed the camera example to avoid build failure using the IAR toolchain.
• Loader QML type fixes:
  • Ensured that the Loader uses correct size for the items in a SwipeView.
  • Improved Qt Quick compatibility.
• Dropped MSVC requirement for the Windows desktop builds using the MinGW toolchain.
• Fixed the thermo demo crash on MIMXRT1064-EVK while choosing a language from the menu.
• Fixed CMP0083 CMake policy error while building for the Linux desktop.
• Fixed Animation logic to avoid incorrect QulError_Animation_ProgressOutOfRange assertions, while checking if the given value within (0-1) bounds.
• Fixed unexpected artifacts on STM32H750B while running the swipe_game demo MinSizeRel build.
• Fixed inconsistency in handling resource properties for resources with custom BASE and PREFIX.
• Fixed stack size calculation logic to avoid the array-bounds compiler warning.
• Fixed the NXP platform port to avoid queries for touch data when there are no touch interrupts.
• Fixed build failure of EK-RA6M3G FreeRTOS platform adaptation with performance measurements enabled.
• Fixed the UI update logic to ensure that a Qul::Property::setValue call triggers a repaint.
• Fixed the motor_cluster demo to ensure RPM indicator is visible on NXP RT1170.
• Fixed the Timer type to ensure that its onTriggered slot works when a function binding returns a boolean.

Qt for MCUs v2.3.0

• Fixed event queue to avoid it being stuck in the overrun state, and print a warning when it enters the state.
• Fixed rendering artifacts on Cypress Traveo II when drawing vector graphics using the Shapes or DrawingEngine APIs.
• Removed the qmlinfterfacegenerator MSVC dependency when cross-compiling for a target using other toolchains.
• Fixed Flickable to ensure that touch-and-drag behavior is consistent across the supported devices.
• Fixed the platform port for EK-RA6M3G to ensure that logging and touch handling works when a custom main is used.
• Moved the startup file in the automotive demo to ensure that it is added to the platform irrespective of the Qt Quick Ultralite build type (static or dynamic).
• Updated CMake logic to use the input from qmlproectexporter to update translations.
• Fixed memory usage by preallocating Image and Text cache buffer to avoid fragmentation.
• Fixed platform source filename conflicts in 3rd party IDEs.
• Ported BoardDefaults.cmake to BoardDefualts.qmlprojectconfig, enabling CMake to use the default values in the qmlproject file.
• Fixed rendering artifacts on STM32F469 with 24bpp color depth.
• Examples and demos:
  • Enabled support for configuring the examples for all the available Qt for MCUs kits.
  • Enabled the image_cache example for RH850 and Cypress Traveo II.
  • Enabled the watch demo for MIMXRT1060.
  • Enabled the static_library example for RH850.
  • Fixed error reporting when non-default color depths are used for the application, without rebuilding the platform. See the Supported features list for more information.
• Fixed crash on STM32F769 due to IAR optimizations.
• Fixed regression in qmlprojectexporter caused by invalid libclang search path.
• Changed the install PATH for the Qt libraries to separate the libraries for MSVC and MinGW. The MSVC version of these libraries are installed into <QUL_ROOT>/lib/msvc, whereas the MinGW version is installed into <QUL_ROOT>/lib/gnu.
• Fixed inconsistent line wrapping for text items with the Text::wrapMode set to WordWrap. The line breaks algorithm for this mode complies with the algorithm recommended by the Unicode standard.
• Fixed issues with rendering a space " " character in the unicodeCoverage list, using the static font engine.
• Fixed crash because of the size optimization for GCC toolchain.

Other changes

• Updated the license manager to support EDU license.

New APIs

APIs for application development

• New Member Functions
• New QML Types

New Member Functions

Class EventQueue:

New QML Types

APIs for platform development

• New Classes

New Classes

Changes in Previous Versions