lv_obj_draw.h

lv_obj_set_ext_draw_size

Set a custom extra draw area (around the widget) to draw shadow, outline, or children etc.

void lv_obj_set_ext_draw_size(lv_obj_t *obj, int32_t size)

lv_obj_init_draw_rect_dsc

Initialize a rectangle draw descriptor from an object's styles in its current state

void lv_obj_init_draw_rect_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_rect_dsc_t *draw_dsc)

lv_obj_init_draw_label_dsc

Initialize a label draw descriptor from an object's styles in its current state

void lv_obj_init_draw_label_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_label_dsc_t *draw_dsc)

lv_obj_init_draw_image_dsc

Initialize an image draw descriptor from an object's styles in its current state

void lv_obj_init_draw_image_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_image_dsc_t *draw_dsc)

lv_obj_init_draw_line_dsc

Initialize a line draw descriptor from an object's styles in its current state

void lv_obj_init_draw_line_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_line_dsc_t *draw_dsc)

lv_obj_init_draw_arc_dsc

Initialize an arc draw descriptor from an object's styles in its current state

void lv_obj_init_draw_arc_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_arc_dsc_t *draw_dsc)

lv_obj_init_draw_blur_dsc

Initialize a blur draw descriptor from an object's styles in its current state. draw_dsc->radius will only be calculated if it's 0 initially. Radius can be set before calling this function to avoid getting it twice.

void lv_obj_init_draw_blur_dsc(lv_obj_t *obj, lv_part_t part, lv_draw_blur_dsc_t *draw_dsc)

lv_obj_calculate_ext_draw_size

Get the required extra size (around the object's part) to draw shadow, outline, value etc.

int32_t lv_obj_calculate_ext_draw_size(lv_obj_t *obj, lv_part_t part)

Returns: int32_t — the extra size required around the object

lv_obj_refresh_ext_draw_size

Send a 'LV_EVENT_REFR_EXT_DRAW_SIZE' Call the ancestor's event handler to the object to refresh the value of the extended draw size. The result will be saved in obj.

void lv_obj_refresh_ext_draw_size(lv_obj_t *obj)