UIFlow-2.0-LVGL-Branch-Demo.py

import sys
import m5
from m5 import lcd
import lvgl as lv
from imagetools import get_png_info, open_png

# M5 init auto detect board type
m5.begin()
# lvgl init
lcd.lvgl_init()
lcd.clear(0xff)

disp_buf1 = lv.disp_draw_buf_t()
buf1_1 = bytearray(lcd.width()*10)
disp_buf1.init(buf1_1, None, len(buf1_1) // lv.color_t.__SIZE__)

# Register display driver
disp_drv = lv.disp_drv_t()
disp_drv.init()
disp_drv.draw_buf = disp_buf1
disp_drv.flush_cb = lcd.lvgl_flush
disp_drv.hor_res = lcd.width()
disp_drv.ver_res = lcd.height()
disp = disp_drv.register()

# touch driver init
indev_drv = lv.indev_drv_t()
indev_drv.init()
indev_drv.type = lv.INDEV_TYPE.POINTER
indev_drv.read_cb = lcd.lvgl_read
indev_drv.register()

# Register PNG image decoder
decoder = lv.img.decoder_create()
decoder.info_cb = get_png_info
decoder.open_cb = open_png

# Create widget
scr = lv.obj()
btn = lv.btn(scr)
btn.align(lv.ALIGN.CENTER, 0, -50)
label = lv.label(btn)
label.set_text("LVGL")
lv.scr_load(scr)

# Create an image from the png file
try:
    with open('res/img/uiflow.png','rb') as f:
        png_data = f.read()
except:
    print("Could not find uiflow.png")
    sys.exit()

img_cogwheel_argb = lv.img_dsc_t({
  'data_size': len(png_data),
  'data': png_data
})

img1 = lv.img(lv.scr_act())
img1.set_src(img_cogwheel_argb)
img1.align(lv.ALIGN.CENTER, 0, 0)

img2 = lv.img(lv.scr_act())
img2.set_src(lv.SYMBOL.OK + "Accept")
img2.align_to(img1, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)