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Version: ver. 1.6.1

Changelog

Version 1.6.1​

Release date: 22 April 2026

New features​

  • Label widget recolor support in LVGL 9.3
  • Image dither feature
  • Screenshot export feature for screens
  • Padding style added to the Image widget
  • Event order can now be modified in Project Settings

Bugfixes​

  • Fixed Command Line export errors
  • Fixed hidden flag not being saved when saving multiple screens
  • Fixed issue so that assets can now be modified without closing the software
  • Fixed screen naming issue when another widget has the same name
  • Fixed font export errors
  • Fixed issue where renamed screens remained in ui.h under their old name
  • Fixed Table widget export error
  • Fixed software freezing when left in the background for a long time

Version 1.6.0​

Release date: 08 January 2026

New features​

  • Added support for LVGL 9.3
  • Extended click area feature added for all widgets
  • New save option to store screens in separate files, enabling multiple people to work on the same project on different screens simultaneously
  • Added support for assigning custom linker sections to image data
  • EV Charger demo now available in 1024×600 resolution
  • Added support for new boards from M5Stack and other manufacturers
  • Improved stability in LVGL crash scenarios
  • Removed LVGL 8.3.6

Bugfixes​

  • Re-added the Delete Screen event
  • Fixed Flex layout issue: if a child uses FR and the FR value is overridden (e.g., to pixels), the change now applies correctly
  • Fixed issue where themes from a previously opened project remained when creating a new project
  • Fixed screen duplication bug where IDs on the original screen changed after duplicating

Version 1.5.4​

Release date: 9 October 2025

New features​

  • Added Coffee Machine example program
  • New out animation phases for screen transitions
  • Project.info file saved alongside project file, containing last save details; included in export for version identification
  • .slp file added alongside project file, storing export paths to simplify multi-user workflows

Bugfixes​

  • Fixed export of all UI files when no board template path is set, ensuring assets are included
  • Fixed underline issue in Enter Passcode
  • Fixed pointer self-assignment issue
  • Fixed Slider animation time style not working
  • Fixed incorrect code in SLS export helpers.c for _ui_screen_delete: updated to...

Version 1.5.3​

Release date: 3 June 2025

New features​

  • UI Re-localization Functions

Bugfixes​

  • Fixed flat export error
  • Fixed dynamic watchdog issue

Version 1.5.2​

Release date: 13 May 2025

New features​

  • Added UI destroy functions
  • Theme optimization
  • New event trigger: LV_EVENT_INSERT
  • Option to export in pre-1.5.1 format

Bugfixes​

  • Fixed font naming issue with hyphens
  • Fixed toast message disappearing in Play mode during LVGL crash
  • Fixed issue with creating fonts with identical names
  • Loading optimization for large projects
  • Image Button default size set to 64x64
  • Fixed full screen mode persistence when launching previous versions
  • Fixed KS_Diagnostics startup issue on Linux versions
  • Roller widget default height set to 100px
  • Fixed rendering order of non-component items within components

Version 1.5.1​

Release date: 03 March 2025

New features​

  • Added LVGL 9.2.2 support
  • Screen Group Implemented Screen Groups functionality
  • Snappable Scroll Added new snappable scroll functions
  • Added warning dialog when deleting widgets or components with custom aliases
  • Widget state is now displayed in the Error list
  • Added warning dialog during export when assets or components are missing
  • Updated OBP files for:
    • arduino_tft_espi
    • cmake_sdl
    • micropython
    • sim_sdl_eclipse
    • stm32h7b3i
    • visual_studio
    • vs_code_sdl
  • Added new board files for:
    • Elecrow DIS01135P
    • Elecrow DIS09024P
    • Renesas RA6M3 HMI
    • Nuvoton NuMaker HMI M467
    • Nuvoton NuMaker HMI M55M1

Bugfixes​

  • Fixed custom aliases not being duplicated when duplicating widgets and components
  • Fixed error panel content disappearing when deleting widgets
  • Fixed application freezing when font names contain hyphens
  • Fixed images and background image style images being exported when "don't export" option is enabled
  • Fixed binary PNG export not working when path is configured in project settings
  • Removed excessive line spacing in exported code
  • Fixed event components still being exported when parent widget/component has "don't export" enabled
  • Fixed case sensitivity issues in object naming
  • Fixed application freezing after undoing screen deletion

Version 1.5.0​

Release date: 29 October 2024

New features​

  • Added padding style to Roller widget.
  • Implemented "Don't export" functionality for widgets.
  • Custom variable alias - support for widgets with unique prefixes.
  • Separated translation checkbox from text properties in components.
  • Added template image export option in project settings.
  • Added "Start maximized window" checkbox in preferences.
  • Optimized project file by excluding default States and Flags from saving.
  • New object naming option: (Widget_Screen)_Name.
  • Improved theme handling performance in exported projects.
  • Added "Show log file" option in File menu to display the latest application log.

Bugfixes​

  • Fixed widget ID changes during project export.
  • Resolved error message display issues during name input.
  • Fixed component element name modification export issue with purple checkmark.
  • Fixed event main class changing to container during save.
  • Resolved compilation errors in Ui_temporary_image.cpp.
  • Fixed event window behavior when events are collapsed.
  • Corrected widget selection issue after deletion on screen.
  • Fixed popup window movement affecting underlying widgets.
  • Resolved widget bounding box rotation issues with transform style.
  • Performance optimization and speed improvements.
  • Handled infinite loops in MicroPython.
  • Improved runtime error handling in MicroPython.
  • Fixed Bg Image override within components in LVGL 9.1.
  • Fixed drawing issue when images of an imageset are deleted after set in an animation.
  • Various minor fixes.

Version 1.4.2​

Release date: 03 August 2024

New features​

  • Transform style: Now every widget can have min and max width and height, as well as be rotated and scaled.
  • Optimization of error handling, detailed error messages appear in the console in case of issues.
  • Event filter icon in the hierarchy.
  • A toast message appears in the launcher with information related to board downlodas.
  • If multiple widgets are stacked on top of each other, clicking multiple times in the same spot will select the other widget.
  • Case-insensitive search in the hierarchy search.
  • The auto-save function overwrites the project file as well, not just creating a copy.
  • Speeding up operations performed with components.
  • The minimum height of panels can be set smaller.
  • The scroll bar in the editor section has been increased, making it easier to use.

Bugfixes​

  • On MacOS and Linux, screens can now be switched by clicking within the screen, not just on the screen header.
  • Fixed the display speed of the event action dropdown list for many widgets.
  • Fixed a crash when writing an excessively large number for outline width.
  • Fixed the problem of changing the layout in the case of the component.
  • Exception handling for syntax errors.
  • Fixed an issue where the default value in the Switch theme event would appear as an error.
  • Fixed a crash when an unknown format file is placed in the assets folder.
  • Fixed the shape parameter to change when switching boards.
  • Fixed an issue where an error panel appears if the keyboard target is not specified within a component.
  • Handling of assets with the same name.
  • Fixed a crash when undoing a detach component action.
  • Fixed the text alignment option in the text area widget.
  • Fixed a crash if there are special characters in the project path.
  • Fixed the Animation imgset const mismatch warning at build.

Version 1.4.1​

Release date: 28 May 2024

New features​

  • Support for LVGL 9.1
  • New stable undo engine
  • An indicator on the hierarchy panel shows when an event is added
  • Error handling tab panel displaying items without selected targets
  • Image inner align in LVGL 9.1
  • Image stretch function
  • Maximum project resolution increased to 4096
  • Toast message for creating and modifying scalar fonts
  • Ability to specify if a board is rectangular or circular in the Open Board Platform (.slb) file
  • New state: Edited state
  • Text in the console panel can be selected and copied
  • Tab panel height can be resized smaller
  • New board files and fixes

Bugfixes​

  • Board loading problems on the launcher screen
  • Fixed dropdown widget border style issue
  • Fixed TextArea alignment issue
  • Improved speed of the EV charger demo
  • Fixed options checkbox in roller components changing enters to '\n' when toggled
  • Corrected screen positioning when switching resolutions
  • Fixed animation naming issue
  • Increased editable screens speed on MacOS with LVGL 8.3.11
  • Fixed lack of notification for unsaved changes when exiting with undo history OFF
  • Fixed screen positioning not updating after changing resolution in project settings

BSP Boards Changes​

New Boards​

  • CMake (includes VScode and Eclipse project settings for debugging and scripting)
  • Visual Studio 2022

Improved​

  • VScode (better config, added lv_drivers, new LVGL9 version)
  • Eclipse (better build configs, LVGL9 version)
  • Visual Studio (minor corrections, better alpha=0 image refreshing, resizability with LVGL9)
  • MicroPython (pre-built executables, build scripts/source code fixes, LVGL9 version)
  • Arduino-TFT_eSPI (updated TFT_eSPI driver, added driver comparison tables for Pico in README)
  • Raspberry Pi (max resolution 4096, configs, LVGL9 version)
  • evkmimxrt595 (circle default in .slb file)

Version 1.4.0​

Release date: 01 Marc 2024

New features​

  • Screens are freely movable on the editor's editable view
  • Management of global colors and themes
  • Theme switch action
  • Support of LVGL 8.3.11
  • Handling assets on external drives
  • Exporting assets in compressed format
  • Option for prefix widget names
  • Clickable flag is disabled by default in container widgets
  • Components cannot be deleted while they are in the project
  • Command-line export without launching SquareLine Studio
  • New example projects in multiple resolutions: EV charger, E-bike
  • Widgets can also be inserted into empty screens from the clipboard

Bugfixes​

  • If I delete a component from the project, it also removes it from the previously exported code.
  • Fixed of compile error, in case of a custom font, if a component is is not in use in the screen.
  • Fixed the Textarea component keyboard switch error.
  • Ability to drag widgets from the widget panel into the hierarchy.
  • Accelerated saving and loading.
  • Compile error on macOS: "The name 'format_options' does not exist in the current context."
  • Fontconverter works on ARM Mac systems without Rosetta.
  • If formatting SPJ is enabled in preferences, it also formats the SLL file.
  • Fixed 'math.h missing' error caused by Spinbox.
  • Fixed the chart widget freezing when no value is specified in the data section.
  • Fixed wrong default value for the Arc widget.
  • Fixed the program freezing when the textarea widget is edited within a component.

Version 1.3.4​

Release date: 11 December 2023

New features​

  • Pan around the screen by moving the area around the screens.
  • Select the default element to be displayed in the Roller widget.
  • Delete assets from the assets panel.
  • UI reset function in the 'Preferences' menu.
  • Padding style added to Checkbox bullet style.
  • Text style added to the main part of the Spinbox widget.
  • Copy-Paste functionality in the hierarchy panel.
  • Examples support multiple resolutions.
  • Icons of dragged widgets from the widget panel are visible under the mouse cursor.
  • Special characters in the project name are changed to '_' in the exported code.
  • You cannot delete a component if it has been created in the project

Bugfixes​

  • Fix for incorrect export in the case of palettized PNG.
  • Formatting fix for exported code.
  • Fix for screen jump when moving a widget on the hierarchy panel.
  • Fix for the unlock function in the hierarchy panel.
  • Dropdown widget export fix for the 'list align left' option.
  • Overflow of uievent.c from CMakeLists.txt in UI export.
  • Bar widget range and symmetrical settings not exported.
  • Play mode stops when opening the launcher.
  • 'Label property' action in events exported as 'to be translated'.
  • Fix for the generation of unused variables.
  • Ability to set a relative path for export paths in project settings.
  • Renamed screens are now deleted during export.
  • Fix for license check error messages.
  • Editing duplicate components with the same name as the original component is now possible.
  • Manufacturer list breaks into multiple rows in the launcher create menu.
  • Override of ui_comp_hook.c in every export fixed.
  • Flax layout export fixed for component modifications.
  • Call function action not generated for certain components, now fixed.
  • Fix for when saving a component, the images in the component change to the default image.
  • Fix for call function action not being exported from certain components.

Version 1.3.3​

Release date: 6 November 2023

New features​

  • Increase in the Personal License limitation: Now allows a maximum of 10 screens (previously 5) and a maximum of 150 widgets (previously 50)
  • Improved performance during widget creation, selection, hierarchy rearrangement, and inspector property modifications
  • Floating license support
  • Optimization of SPJ file
  • Optimization of component files (To optimize your existing components, press the "Edit Component" and then "Save Component" buttons in the inspector panel)
  • Introduction of a new Screen panel (Screens and hierarchy elements are now in separate panels)

Bugfixes​

  • Added support for M1/M2 MacOS ARM CPUs
  • Fixed a Spinbox export issue related to the main style
  • Dropdown widget focused state fixed
  • Improved code formatting
  • Fixed an issue with "Don't export screen."
  • Fixed a flex export issue
  • Corrected the missing prefix in the Screen .c file

Version 1.3.2​

Release date: 30 August 2023

New features​

  • General speed up
  • Add a "Don't export screen" proty to screens
  • Flat export (for better Arduino compatibility)
  • Allow 128 character long widget names
  • Add NXP and ST boards

Bugfixes​

  • Make components events run
  • Fix any issue when overwriting styles properties in components
  • Fix Background style usage of Spinbox
  • Fix the history panel
  • Fix the Object naming option in Project preferences
  • Fix incorrectly setting the default font lv_conf.h
  • Fix ui_Screen is not defined (Python link error)

Version 1.3.1​

Release date: 13 July 2023

New features​

  • Faster project load and save
  • Faster component creation and modification
  • Speed up SLS in general
  • Enable Auto save by default
  • Add Tabview widget
  • Add Spinbox widget
  • Set UI scale to 150% by default on high DPI monitors
  • Add new states for styles:  FOCUS_KEY, CHECKED | FOCUSED, CHECKED | FOCUS_KEY
  • New event triggers: KEY,  LV_EVENT_SHORT_CLICKED
  • New event actions: delete screen, step spinbox
  • Improve Undo
  • Add Temporary screen options (If enabled on a screen, that screen will automatically created on when loaded, and deleted when unloaded)
  • Add new Nuvoton board
  • Add new flags:  SCROLL_WITH_ARROW, OVERFLOW_VISIBLE
  • Add "Fit to screen" icon to the header

Bugfixes​

  • Do not overwrite ui_comp_hook.c on export
  • Fix calendar export issue
  • Save Flex layout paddings
  • Add function in ui_events.h only once

Version 1.3.0​

Release date: 3 May 2023

New features​

  • Option to set the default ALIGN in Project preferences- Organize the exported code into folders
  • Show the current cursor position on the header
  • Export CMakeFile.txt, mk and a general filelist for easier integration
  • Option to send crash logs
  • Add LVGL 8.3.6
  • Add lv_indev_wait_release to gesture events
  • Saving the chart series data into components
  • Organize the exported C code into folders
  • Multi language support

Bugfixes​

  • Fix error with chart export 
  • Fix color picker on Linux

Important

Due the new exported project structure at least the the v1.1.0 version of the Arduino project needs to be used from SLS v1.3.0.

Version 1.2.3​

Release date: 29 Mar 2023

New features​

  • Use multiple cores during exporting
  • Add popup if some information are missing in the font converter
  • Color style properties can be set with a single hex number
  • Update the colors real time while the colors are adjusted in the color picker
  • Add popup in case of  the portable license if you are logged in from another computer too 
  • Enable the build in montserrat fonts automatically if needed

Bugfixes​

  • Fix the project not loading due to issues with the images
  • Fix exporting the images in the correct color depth in MicroPython
  • Do not export the images deleted from the assets folder
  • Fix mixing the order of screen during loading the projects 
  • Update the color if the hex value has been changed in the color picker
  • Fix the size of the color picker on Linux

Version 1.2.2​

Release date: 20 Mar 2023

New features​

  • Use multiple cores during exporting
  • Include ui_comp.h in ui.h
  • Add a hook for component creation
  • Initial actions on startup
  • Allow deleting components from the editor
  • Image frame animation
  • Add lv_events.h even if the "Call function" events are not exported
  • Allow editing flex properties in components

Bugfixes​

  • Fixing bugs related to components
  • Fix the list when right clicking on a widget on a screen
  • Add extern "C" to ui_comp.h
  • Add scrollbar style to the panel widget
  • Make rendering faster
  • Fix disappearing style properties on the screens
  • Fix dropdown styles if they are components

Version 1.2.1​

Release date: 10 Feb 2023

New features​

  • 2x timer faster project loading
  • Smaller project file size
  • Formatted (uncompressed) project file format (JSON)
  • Rectangle and round display options- allow adjusting the layouts parameters in components
  • Export the UI files too when the a template project is generated
  • Save the editor version in the project files 
  • Save widget selection in history
  • Smart Watch example project

Bugfixes​

  • Fix the missing scrollbar on the main area
  • Download missing boards if the project was imported (and not created)
  • Fix that the widgets couldn't be unlocked after opening the project again
  • Fix the reverse widgets order in components during save/reload
  • Fix naming issues during component duplication
  • Fix exception when moving a component's child
  • Fix renaming fonts in components
  • Fix file names in "Save as..." in Linux

Version 1.2.0​

Release date: 11 Jan 2023

Bugfixes​

  • Fix changing the order of widgets on component editing
  • Fix renaming components
  • Fix the disappearing images on component generation
  • Fix detaching components
  • Fix the generated code in SET_TEXT_VALUE_FROM_SLIDER
  • Make the launch screen scrollable on small resolutions too
  • Fix crating component from the hierachy
  • Fix file browser issue with Wayland
  • Fix the "hidden" feature
  • Fix saving the project settings window
  • Fix auto scrolling to the selected widget in the hierarchy panel

New features​

  • Portable license option
  • Flex layout
  • Chart widget
  • “lvgl include path” setting in the Project settings
  • Scrollbar redesign
  • On Zoom In focus on the active screen
  • Hotkeys:
    • "a" center the active screen
    • "f" center the selected widget
  • Font manager keep the settings from the last generation
  • Allow renaming the generated fonts
  • Add Keyboard set text area action
  • Get board dynamically, on demand from GitHub
  • Add "None" option to Screen change types
  • Add padding style option to screen and button widgets
  • Add option to whether to add or not the screen name to the new widget
  • Add support for LVGL 8.3.4
  • Make it possible to style the list of the drop down widget.

Version 1.1.1​

Release date: 05 Oct 2022

Bugfixes​

  • Many fixes for Undo
  • Fix memory leak
  • Fix renaming the children of components
  • Fix moving widgets with large zoom
  • Fix Calendar's C export

New features​

  • LVGL version selector
  • In Preference you you can configure the length of the History
  • You can run more SLS instances simultaneously
  • Automatically the Screen name in the default name of the new widgets
  • In Project settings you can configure how to export ui_event file: ui_event.c, ui_event.cpp or none

Version 1.1.0​

Release date: 01 Sept 2022

Bugfixes​

  • Fix the "Copy" feature in the Hierarchy panel
  • Fix the "Eye" (hide) feature in the Hierarchy panel
  • Fix non clickable elements on the right side of the screen
  • Fix saving the animation parameters when they have been changed.
  • Fix incorrectly exported blend mode
  • If an image has no alpha channel or all alpha values are 0xFF, generate LV_IMG_CF_TURE_COLOR images. If there is alpha channel export with LV_IMG_CF_TRUE_COLOR_ALPHA format.
  • Make SET_TEXT_VALUE_WHEN_CHECKED area multiline and fix text off
  • Do not allow setting the height of the Text area in one-line mode
  • Fix adding assets on MacOS
  • Improve peroformace
  • Fix export error for drop down list
  • Fix export error for slider increment event
  • Fix image rotation export error.
  • Fix hiding widgets with the eye icon in the hierarchy.
  • Fix issue with sing the lock icon
  • Fix exporting C code on macOS M1
  • Fix exporting the pivot for images
  • Save the test object of animations.

New features​

  • Error and warning messages are added to the console window
  • Add "Force export all images" to project settings to export not only the used images but all images from the assets folder
  • Add Espressive boards: ESP-BOX, ESP Wrover Kit
  • Check if an image has or hasn't alpha channel and choose the color format accordingly
  • Add Open Board Platform
  • Add Components
  • Auto save
  • Add gesture events
  • Add an info popup when revoking the license
  • Add new animation features
  • Add "Check for update at start" checkbox in preferences

Version 1.0.5​

Release date: 28 Marc 2022

Changes​

  • Fix freeze on minimize
  • Fix missing theme into code in C
  • Fix export issue if an image was deleted- Set UI scale to 150% on HiDpi monitors
  • Add close button to "project cards" in the launcher
  • Improve performance
  • Auto-assign new names for child widgets on  copy
  • Add CJK character set to font converter (only common characters)
  • Update the image selector dropdown on the image widget if a new asset is added
  • Trigger Save confirmation popup on animation property change too
  • Allow position the selected widget with arrows
  • Add support for life-time license
  • New example project: Thermostat

Version 1.0.4​

Release date: 11 Marc 2022

Changes​

  • Fix typo in the "Ignore layout" flag
  • Fix error message when the trial period is over
  • Fix the missing option setting in the exported code of Roller and Checkbox
  • Fix the missing exported code for the Chart
  • Fix overwriting the content of ui_events.c on export
  • Include lvgl.h in ui.h in a more flexible way
  • In the exported code check if the color settings are correct
  • Add "ui_" prefix to the names of the widget in the exported py files to avoid conflict with reserved words

Version 1.0.3​

Release date: 04 Marc 2022

Changes​

  • Performance optimization
  • Line wrap on all images in ui_images.py
  • Fix rare crash when moving widgets in the hierarchy
  • Fix the exporting of the CLICKABLE flag on bar widget

Version 1.0.2​

Release date: 23 February 2022

Changes​

  • Fix error when loading the POS demo
  • "File->Save as..." saves the Assets folder too
  • Fix the Save button on the close confirmation pop up
  • Show the close confirmation pop up only if there were changes
  • On "Save" also save the project into a zip file and keep the last 10 versions 

Version 1.0.1​

Release date: 21 February 2022

Changes​

  • In the font manager the name of the fonts can start only with letters and can contain space and numbers
  • In the exported user "call function" actions pass the whole event structure as parameter
  • Instead of opening the example, create a new project from them
  • FOCUSED style is added to all widgets
  • Fix typo in the "Scroll direction" dropdown. "Top" was added twice and "Ver" was missing
  • Follow the changes in the licensing
  • Animations can be renamed
  • Collapsed animation panels remain collapsed when a new event is added