What do you want to achieve?
LVGL supports various animation types. In particular, the “OUT” animation is present in LVGL8+, but missing from SquareLine studio. “OUT” is similar to “OVER”, but in reverse. With “OVER” new screen slides in over old screen. With “OUT” old screen slides away to reveal new screen.
SquareLine(has MOVEs/OVERs/FADE-ON):
LVGL 8.3.11 and 8.4.0:
typedef enum {
LV_SCR_LOAD_ANIM_NONE,
LV_SCR_LOAD_ANIM_OVER_LEFT,
LV_SCR_LOAD_ANIM_OVER_RIGHT,
LV_SCR_LOAD_ANIM_OVER_TOP,
LV_SCR_LOAD_ANIM_OVER_BOTTOM,
LV_SCR_LOAD_ANIM_MOVE_LEFT,
LV_SCR_LOAD_ANIM_MOVE_RIGHT,
LV_SCR_LOAD_ANIM_MOVE_TOP,
LV_SCR_LOAD_ANIM_MOVE_BOTTOM,
LV_SCR_LOAD_ANIM_FADE_IN,
LV_SCR_LOAD_ANIM_FADE_ON = LV_SCR_LOAD_ANIM_FADE_IN,
LV_SCR_LOAD_ANIM_FADE_OUT, //Missing from SquareLine
LV_SCR_LOAD_ANIM_OUT_LEFT, //Missing from SquareLine
LV_SCR_LOAD_ANIM_OUT_RIGHT, //Missing from SquareLine
LV_SCR_LOAD_ANIM_OUT_TOP, //Missing from SquareLine
LV_SCR_LOAD_ANIM_OUT_BOTTOM, //Missing from SquareLine
} lv_scr_load_anim_t;
Do you see alternative options and workaround to achieve it?
An alternative cumbersome workaround is to replace the screen transition events with function call events and manually wire in the OUT transitions as needed.
Mention some use cases
The “OVER” animation is useful to present the idea of a screen appearing over another screen, and then “OUT” can be used to reveal the original screen.