LVGL v5.3 - MicroPython Support and New Widgets

What Has Happened Since v5.2?#

LVGL Integrations #

LVGL's ecosystem expanded significantly with major platform integrations:

Espressif officially supports LVGL as a GUI library for ESP32. Read more in this post.
Zephyr, a popular RTOS for IoT, has integrated LVGL. Here is getting started example.

Community and Website Updates #

Blog - LVGL's Blog has been launched. It's for you to share your projects, tutorials, tips, and tricks. Read here how to add your post.
Forum - Our Forum is opened. Please use it for "how-to" questions and open GitHub issues for development related topics.
Documentation - The documentation is moved to a public repository where you can send pull requests to improve it. The documentation is available Online and Offline.

Some Metrics #

LVGL is getting more popular. According to the GitHub statistics LVGL is cloned every 10 minutes. (Not counting direct downloads from lvgl.com)
LVGL was a Top trending repository of GitHub. It was among the top 25 most popular repositories when compared across all languages, not only C.

Thanks to @amirgon, you can now use LVGL with MicroPython (a Python implementation for embedded systems). Read more in this post. You can try it on Linux or with ESP32 using this ready-to-use repository.

New Objects #

lv_tileview - Container for smartwatch-like designs
lv_spinbox - Set numeric value with + and - buttons or keys
lv_table - Create lightweight tables
lv_canvas - Draw to a buffer and display it as an image

New Object Features #

Core Objects #

lv_obj - Add realign feature (save the last lv_obj_align data and re-apply)
lv_obj - Add lv_obj_align_origo to align the center of the object (works with realign)

Charts #

lv_chart - LV_CHART_TYPE_VERTICAL_LINE when the point count equals the chart width to draw only vertical lines
lv_chart - Add LV_CHART_POINT_DEF special value to not draw a point

Input Widgets #

lv_sw - Animated move (lv_sw_set_anim_time(), lv_sw_on/off_anim())
lv_btnm - Add lv_btnm_get_pressed()
lv_btnm - Add recolor feature with lv_btnm_set_recolor
lv_ta - Support LV_GROUP_KEY_BACKSPACE
lv_ddlist - Add down arrow symbol option with lv_ddlist_set_draw_arrow
lv_ddlist - Add ability to set label alignment

List and Scrollable Objects #

lv_list - Remember the last selected button (only if the list is in a group)
lv_list - Allow single button selection mode
lv_list, lv_ta, lv_page - Scroll propagation feature to scroll the parent on "overscrolling"
lv_list, lv_ta, lv_page - Edge flash effect to show circle on the edge on "overscrolling"

Other Widgets #

lv_preload - Add lv_preload_set_animation_type() and LV_PRELOAD_TYPE_FILLSPIN_ARC
lv_imgbtn - Add tiled option to set width dynamically by repeating the middle part
lv_calendar - Add lv_calendar_get_pressed_date
lv_tabview - Add lv_tabview_set_hidden to hide tab buttons

New Other Features #

System Features #

lv_lang - Multi-language interface to change UI's language at runtime
lv_group - Add LV_GROUP_KEY_BACKSPACE
lv_anim - Add overshoot and bounce path
lv_anim - Add lv_anim_count_running
lv_indev - Add lv_indev_set_feedback to add callback when something happened with an object
lv_vdb - Add true double buffering feature to work with only frame buffer address swapping
lv_style - Add LV_BORDER_INTERNAL to remove the borders on the edges
lv_porting - Add display, input device, file system porting skeleton functions

Plans for v6.0 #

The next major version will focus on:

Multi-display support
Runtime screen configuration (instead of hard-coded defines)
Generic action handling (lv_obj will have an action)
Better GPU handling
Image rotation
Better internationalization support (i18n)

You can track the progress in this issue.