LVGL v5.0 - Unicode Support, Themes, and Simpler Architecture

Here is the v5.0.0 release with a much simpler architecture. Now the graphics library means only the lvgl repository. Besides the architectural changes, Unicode support, style themes, and new smartphone-like object types are added. To make it easier to get started, a tutorial is released in the lv_examples repository.

Architectural Changes#

• Integrate misc into lvgl
• Integrate hal into lvgl
• Convert Applications into simple examples
• Rename repository from proj_pc to pc_simulator
• Create a new independent repository for examples (lv_examples)
• Create a new independent repository for development boards (lv_boards)
• Create a new independent repository for drivers (lv_drivers)

System Level Changes#

• Object type inheritance is hidden. Every object has its own API (except lv_obj_set/get_... functions)
• Rework lv_style_t to be more versatile
• Rename (and slightly rework) some functions, defines, and enums to be more descriptive
• Make styles global variables for less typing
• Make fonts global variables for less typing and easy user-font adding
• Join symbol fonts into normal built-in fonts (use normal fonts, and lvgl will find symbol fonts too)
• Rename lv_dispi_... to lv_indev_...
• Simplified action functions: lv_res_t action (lv_obj_t * obj) - use lv_indev_act() if required

New Features#

• Unicode support with UTF-8 decode
• Themes with predefined styles
• lv_tabview: new object type to organize content with tabs
• lv_sw: new object type, switch, turn on/off by tap (a little slider)
• lv_roller: new object type, a roller to select a value (like on smartphones)
• lv_kb: new object type, Keyboard
• lv_btnm: lv_btnm_set_toggle() to toggle last button
• lv_btnm: rework width control. Now a control byte is used for width, hide, and no long press settings
• lv_ta: cursor types
• lv_gauge: rework to make it more like line meter (remove background but add scale lines)
• Partial border draw in styles
• Hide anti-aliasing upscale (no x * LV_DOWNSCALE is required)

Bugfixes#

Due to lv_tests, a massive number of bug fixes happened.