acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_meter_3.py (2472B)
      1 #!//opt/bin/lv_micropython -i
      2 import utime as time
      3 import lvgl as lv
      4 import display_driver
      5 from imagetools import get_png_info, open_png
      6 
      7 # Register PNG image decoder
      8 decoder = lv.img.decoder_create()
      9 decoder.info_cb = get_png_info
     10 decoder.open_cb = open_png
     11 
     12 # Create an image from the png file
     13 try:
     14     with open('../../assets/img_hand_min.png','rb') as f:
     15         img_hand_min_data = f.read()
     16 except:
     17     print("Could not find img_hand_min.png")
     18     sys.exit()
     19 
     20 img_hand_min_dsc = lv.img_dsc_t({
     21   'data_size': len(img_hand_min_data),
     22   'data': img_hand_min_data
     23 })
     24 
     25 # Create an image from the png file
     26 try:
     27     with open('../../assets/img_hand_hour.png','rb') as f:
     28         img_hand_hour_data = f.read()
     29 except:
     30     print("Could not find img_hand_hour.png")
     31     sys.exit()
     32 
     33 img_hand_hour_dsc = lv.img_dsc_t({
     34   'data_size': len(img_hand_hour_data),
     35   'data': img_hand_hour_data
     36 })
     37 
     38 def set_value(indic, v):
     39     meter.set_indicator_value(indic, v)
     40 #
     41 # A clock from a meter
     42 #
     43 
     44 meter = lv.meter(lv.scr_act())
     45 meter.set_size(220, 220)
     46 meter.center()
     47 
     48 # Create a scale for the minutes
     49 # 61 ticks in a 360 degrees range (the last and the first line overlaps)
     50 scale_min = meter.add_scale()
     51 meter.set_scale_ticks(scale_min, 61, 1, 10, lv.palette_main(lv.PALETTE.GREY))
     52 meter.set_scale_range(scale_min, 0, 60, 360, 270)
     53 
     54 # Create another scale for the hours. It's only visual and contains only major ticks
     55 scale_hour = meter.add_scale()
     56 meter.set_scale_ticks(scale_hour, 12, 0, 0, lv.palette_main(lv.PALETTE.GREY))  # 12 ticks
     57 meter.set_scale_major_ticks(scale_hour, 1, 2, 20, lv.color_black(), 10)         # Every tick is major
     58 meter.set_scale_range(scale_hour, 1, 12, 330, 300)                             # [1..12] values in an almost full circle
     59 
     60 #    LV_IMG_DECLARE(img_hand)
     61 
     62 # Add the hands from images
     63 indic_min = meter.add_needle_img(scale_min, img_hand_min_dsc, 5, 5)
     64 indic_hour = meter.add_needle_img(scale_min, img_hand_hour_dsc, 5, 5)
     65 
     66 # Create an animation to set the value
     67 a1 = lv.anim_t()
     68 a1.init()
     69 a1.set_values(0, 60)
     70 a1.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
     71 a1.set_time(2000)        # 2 sec for 1 turn of the minute hand (1 hour)
     72 a1.set_var(indic_min)
     73 a1.set_custom_exec_cb(lambda a1,val: set_value(indic_min,val))
     74 lv.anim_t.start(a1)
     75 
     76 a2 = lv.anim_t()
     77 a2.init()
     78 a2.set_var(indic_hour)
     79 a2.set_time(24000)       # 24 sec for 1 turn of the hour hand
     80 a2.set_values(0, 60)
     81 a2.set_custom_exec_cb(lambda a2,val: set_value(indic_hour,val))
     82 lv.anim_t.start(a2)
     83