lvgl_hello_world_sdl.py

import lvgl as lv
import SDL

w = 800
h = 600

lv.init()
SDL.init(w=w,h=h)

# Register SDL display driver.

disp_buf1 = lv.disp_buf_t()
buf1_1 = bytes(480*10)
lv.disp_buf_init(disp_buf1,buf1_1, None, len(buf1_1)//4)
disp_drv = lv.disp_drv_t()
lv.disp_drv_init(disp_drv)
disp_drv.buffer = disp_buf1
disp_drv.flush_cb = SDL.monitor_flush
disp_drv.hor_res = w
disp_drv.ver_res = h
lv.disp_drv_register(disp_drv)

# Regsiter SDL mouse driver

indev_drv = lv.indev_drv_t()
lv.indev_drv_init(indev_drv) 
indev_drv.type = lv.INDEV_TYPE.POINTER;
indev_drv.read_cb = SDL.mouse_read;
lv.indev_drv_register(indev_drv);

# Button with a label 

scr = lv.obj()
btn = lv.btn(scr)
btn.align(scr, lv.ALIGN.CENTER, 0, 0)
label = lv.label(btn)
label.set_text('Hello World!')
lv.scr_load(scr)