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:

Changes in 1.2

New features

• Added support for required property. See QML Data Models for more information.
• Added support for in-line QML components.
• Added support for image resource URIs without the "qrc:" scheme. See Adding files to the resource system for more information.
• Added support for implicit conversions in QML from a number type to string.
• Accessing models from delegates is now consistent with Qt Quick.

Source compatibility breaks

• "#pragma main" cannot be used anymore to define the application's main QML file. Define your own C++ main function and call setRootItem() on the application object, or use the app_target_default_main CMake command to automatically generate a main function for a given QML file.
• Removed the Qul.image() function for better compatibility with Qt Quick. The Image source property now always accepts strings, even when set through scripts or bindings.
• ListModel::count is now a property instead of a method to be compatible with Qt Quick.
• Dropped support for Easing.InCurve, Easing.OutCurve, Easing.SineCurve, and Easing.CosineCurve, for better compatibility with Qt Quick.
• Dropped the Behavior::animation property. It is no longer accessible from QML.
• Changed the import URI and CMake target for unstyled control templates to be compatible with Qt Quick. Import QtQuick.Templates instead of QtQuick.Controls.Templates, and use the QuickUltraliteTemplates CMake target instead of QuickUltraliteControlsTemplates.
• The coordinates are now stored internally with 16 bit instead of 32 bit. This means that an item cannot be placed at more than 32765 pixels away from the origin.
• On STM32F7508-DK, the printf output is directed via USART1 now, which is connected to ST-LINK Virtual COM Port instead of USART6. USART6 is not initialized anymore.

Fixed issues

• The application is linked to the LodePNG PNG decompression library only if the QUL_RESOURCE_COMPRESSION flag is set on one of its assets.
• Improved flicking between pages in a SwipeView.
• Fixed visual artifacts when rotating scaled images.
• Improved support for console.log() in Qt Creator. Calls to this function are now logged to the console instead of queuing them till the application exits.
• Fixed bug with free(nullptr) on FreeRTOS.

New APIs

• New Classes

New Classes