Merge pull request adafruit#1182 from adafruit/TheKitty-patch-46

Code for the CircuitPython Day 2020 on PyPortal guide

Author: dhalbert

PyPortal_CircuitPython_2020/code.py

@@ -0,0 +1,84 @@
+"""
+This example will figure out the current local time using the internet, and
+then draw out a countdown clock until an event occurs!
+Once the event is happening, a new graphic is shown
+"""
+import time
+import board
+from adafruit_pyportal import PyPortal
+from adafruit_bitmap_font import bitmap_font
+from adafruit_display_text.label import Label
+
+# The time of the thing!
+EVENT_YEAR = 2020
+EVENT_MONTH = 9
+EVENT_DAY = 9
+EVENT_HOUR = 0
+EVENT_MINUTE = 0
+# we'll make a python-friendly structure
+event_time = time.struct_time((EVENT_YEAR, EVENT_MONTH, EVENT_DAY,
+                               EVENT_HOUR, EVENT_MINUTE, 0,  # we don't track seconds
+                               -1, -1, False))  # we dont know day of week/year or DST
+
+# determine the current working directory
+# needed so we know where to find files
+cwd = ("/"+__file__).rsplit('/', 1)[0]
+# Initialize the pyportal object and let us know what data to fetch and where
+# to display it
+pyportal = PyPortal(status_neopixel=board.NEOPIXEL,
+                    default_bg=cwd+"/circuitpython_day_countdown_background.bmp")
+
+big_font = bitmap_font.load_font(cwd+"/fonts/Helvetica-Bold-36.bdf")
+big_font.load_glyphs(b'0123456789') # pre-load glyphs for fast printing
+event_background = cwd+"/countdown_event.bmp"
+
+days_position = (8, 207)
+hours_position = (110, 207)
+minutes_position = (220, 207)
+text_color = 0xFFFFFF
+
+text_areas = []
+for pos in (days_position, hours_position, minutes_position):
+    textarea = Label(big_font, max_glyphs=3)
+    textarea.x = pos[0]
+    textarea.y = pos[1]
+    textarea.color = text_color
+    pyportal.splash.append(textarea)
+    text_areas.append(textarea)
+refresh_time = None
+
+while True:
+    # only query the online time once per hour (and on first run)
+    if (not refresh_time) or (time.monotonic() - refresh_time) > 3600:
+        try:
+            print("Getting time from internet!")
+            pyportal.get_local_time()
+            refresh_time = time.monotonic()
+        except RuntimeError as e:
+            print("Some error occured, retrying! -", e)
+            continue
+
+    now = time.localtime()
+    print("Current time:", now)
+    remaining = time.mktime(event_time) - time.mktime(now)
+    print("Time remaining (s):", remaining)
+    if remaining < 0:
+        # oh, its event time!
+        pyportal.set_background(event_background)
+        while True:  # that's all folks
+            pass
+    secs_remaining = remaining % 60
+    remaining //= 60
+    mins_remaining = remaining % 60
+    remaining //= 60
+    hours_remaining = remaining % 24
+    remaining //= 24
+    days_remaining = remaining
+    print("%d days, %d hours, %d minutes and %s seconds" %
+          (days_remaining, hours_remaining, mins_remaining, secs_remaining))
+    text_areas[0].text = '{:>2}'.format(days_remaining)  # set days textarea
+    text_areas[1].text = '{:>2}'.format(hours_remaining) # set hours textarea
+    text_areas[2].text = '{:>2}'.format(mins_remaining)  # set minutes textarea
+
+    # update every 10 seconds
+    time.sleep(10)