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

Important changes

• Enabled the critical assert error codes for debug builds only, and disabled them for Rel and MinSizeRel builds.
• Cypress Traveo II prebuilt libraries are built using the GHS 2017 compiler. You need the same compiler version to either use these libraries or recompile the core library.
• Downgraded the platform code for Renesas RH850 platform to C++03 and Cypress Traveo II to C++11.
• Added support for NXP MIMXRT1060-EVKB and dropped support for the earlier version of this board (MIMXRT1060-EVK).
• Deprecated the platformexporter tool as you can now export the platform sources using qmlprojectexporter. Refer to QmlProject Manual for more information.

New features

• Added support for software vector graphics.
• Added support for GHS 2015.1.7 compiler with C++03 on the Renesas RH850.
• SDK upgrades:
  • STM32H750B SDK to v1.11.0
  • STM32F469 SDK to v1.27.1
  • Renesas RH850/D1M1A RGL SDK to v2.1.0a
  • NXP RT1050 and RT1064 to SDK v2.13.0
  • NXP RT1060 and RT1170 to SDK v2.13.1
  • Cypress Traveo II SDK to 1.2.1
• Added support for pausing and resuming an AnimatedSprite.
• QmlProject updates:
  • Added documentation to enable easy migration of the UI resource configuration to QmlProject.
  • Update the Quick start guides with qmlprojectexporter workflow.
  • Added the resourceAnimatedSpriteOptimizations QmlProject property to enable rendering only the changed regions of an image.
  • Added support for generating a GHS Multi IDE project. Refer to the QmlProject Manual for more information about this option.
• Added support for LVDS displays on Renesas RH850/D1M1A. Refer to the supported displays section for more information.

Fixed issues

Qt for MCUs v2.5.1

• Fixed Qt desktop platform library to make sure a Qt for MCUs application does not busy-loop on desktop.
• Fixed qmltocpp to avoid unknown property warnings by Qt Creator for the StaticText, Rotation, and Scale QML types.
• Fixes to examples and demos:
  • Added explicit size to the main window in watch demo to avoid clipped edges on Desktop.
  • Fixed the swipe_game demo to avoid unexpected artifacts. Dropped overlapping MouseArea objects and restricted to vertical scrolling only.
  • Fixed the sprite_animations to avoid rendering artifacts.
• Fixed SwipeView to avoid grabbing touch events for disabled items.
• Fixed wrong stacking order of children with a z value.
• Updated the code snippets in AnchorChanges documentation.
• Fixed crash while animating an item based on its property binding.
• Fixed regression in SwipeView to make sure setCurrentIndex() works as expected, even if you swipe beyond the minimum or maximum index.
• Fixed event queue overrun on STM devices by using the EventQueue::isEmpty() method.
• Fixed qmlprojectexporter to avoid calling qmltocpp on modules that do not have QML files.
• Fixed the following issue for AnimatedSprite:
  • Avoid applying same frame optimization on cropping.
  • Enable RLE compression for cropping optimization.
• Fixed QmlProject config for storage sections to support names with dot prefix.
• Added license check to qmlprojectexporter.
• Fixed transition animations on PropertyChanges to avoid using property binding from a wrong state. Every call to the setValue() method clears the old binding.
• Fixed animations triggered from C++ to make sure they don't end early.
• Fixed qmlprojectexporter to add the missing optimizations for a GHS project.

Qt for MCUs v2.5.0

• Fixed assertion for auto-wrapped Text items when its horizontal alignment is either Text.AlignRight or Text.AlignHCenter.
• Improved text cache performance.
• Moved texture cache to internal RAM.
• Improved kit configuration support in Qt Creator.
• Fixed SwipeView to update its currentIndex while dragging.
• Fixed the ProgressBar implementation to initialize its from and to properties with default values.
• Improved ResourceCropImageSequence optimization support to remove the transparent pixels from the image sequences.
• Fixed qulrcc to make sure it reuses saved data for the same frames.
• Optimized the memory allocations done by the DrawingEngine for path points.
• Downgraded the example-platform implementation to C++03 so that it works on all platforms.
• QmlProject fixes:
  • Ignored DS properties that are not prefixed with QDS.
  • Added libclang dependency to avoid build failures when using the MinGW toolchain.
  • Increased the default process timeout interval to make sure that qmlprojectexporter has enough time to process large projects.
  • Update the logic to collect and include the linker options on a single line.
  • Fixed the file selector logic to include the QML module dependencies.
• Examples and demos:
  • Fixed thermo demo to avoid the flickering artifacts on STM32F769.
  • Fixed the shapes example to avoid
  • Updated the translation example resize the flag image based on screen orientation.
  • Updated the LED PIN configuration for the freertos_multitask example to make sure the LED blinks on NXP RT1050.
• Fixed memory corruption when using the onChanged QML handlers for C++ properties.
• Fixed flash targets for external Octa flash on Renesas RH850/D1M1A.
• Fixed qmltocpp to use relative path to the C++ functionality used in QML.
• Added CMake warning about insufficient internal flash storage on Renesas RA6M3G with build types other than MinSizeRel. Refer to Renesas EK-RA6M3G notes for more information.

New APIs

APIs for application development

• New QML Properties
• New QML Methods

New QML Properties

QML Type AnimatedSprite:

New QML Methods

QML Type AnimatedSprite:

Changes in earlier versions