LVGL v7.2 Released with Screen Transitions and Theme Extensions

LVGL v7.2 is released with features like screen transition animations, easy theme extension support, and many other enhancements.

New Features#

Screen Transitions#

Add screen transitions with lv_scr_load_anim() to create smooth animated transitions between screens.

Display Background Customization#

Add display background color, wallpaper, and opacity. Shown when the screen is transparent. Can be used with lv_disp_set_bg_opa(), lv_disp_set_bg_color(), and lv_disp_set_bg_image().

Calendar Enhancements#

Add LV_CALENDAR_WEEK_STARTS_MONDAY configuration option for localized calendar displays.

Chart Improvements#

New chart functions for advanced data visualization:

• lv_chart_set_x_start_point() - Set the index of the x-axis start point in the data array
• lv_chart_set_ext_array() - Set an external array of data points to use for the chart
• lv_chart_set_point_id() - Set an individual point value in the chart series directly based on index
• lv_chart_get_x_start_point() - Get the current index of the x-axis start point in the data array
• lv_chart_get_point_id() - Get an individual point value in the chart series directly based on index
• lv_chart_set_series_axis() - Assign series to primary or secondary axis
• lv_chart_set_y_range() - Allow setting range of secondary y-axis

Add ext_buf_assigned bit field to lv_chart_series_t structure - it's true if external buffer is assigned to series.

Roller Customization#

Allow setting different font for the selected text in lv_roller widget.

Theme System Improvements#

• Add theme->apply_cb to replace theme->apply_xcb to make it compatible with the MicroPython binding
• Add lv_theme_set_base() to allow easy extension of built-in (or any) themes

Alignment Functions#

Add new alignment helper functions:

• lv_obj_align_x() and lv_obj_align_y() - Align objects on a single axis
• lv_obj_align_origo_x() and lv_obj_align_origo_y() - Align object origin on a single axis

Bug Fixes#

• Fix tileview navigation when not screen sized
• Use 14px font by default for better compatibility with smaller displays
• Fix linemeter conversion of current value to "level"
• Fix drawing on right border
• Set the cursor image non-clickable by default
• Improve mono theme when used with keyboard or encoder