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"""
Menu Script
===========
You can customize this script however you want :) If you want to go back to
the default version, just delete this file; the firmware will recreate it on
next run.
"""
import buttons
import color
import display
import os
def list_apps():
"""Create a list of available apps."""
apps = sorted(os.listdir("."))
# Filter for apps
apps = [app for app in apps if app.endswith(".elf") or app.endswith(".py")]
if "menu.py" in apps:
apps.remove("menu.py")
return apps
def button_events():
"""Iterate over button presses (event-loop)."""
yield 0
button_pressed = False
while True:
v = buttons.read(buttons.BOTTOM_LEFT | buttons.BOTTOM_RIGHT | buttons.TOP_RIGHT)
if v == 0:
button_pressed = False
if not button_pressed and v & buttons.BOTTOM_LEFT != 0:
button_pressed = True
yield buttons.BOTTOM_LEFT
if not button_pressed and v & buttons.BOTTOM_RIGHT != 0:
button_pressed = True
yield buttons.BOTTOM_RIGHT
if not button_pressed and v & buttons.TOP_RIGHT != 0:
button_pressed = True
yield buttons.TOP_RIGHT
COLOR1, COLOR2 = (color.CHAOSBLUE_DARK, color.CHAOSBLUE)
def draw_menu(disp, applist, idx, offset):
disp.clear()
# Wrap around the app-list and draw entries from idx - 3 to idx + 4
for y, i in enumerate(range(len(applist) + idx - 3, len(applist) + idx + 4)):
disp.print(
" " + applist[i % len(applist)] + " ",
posy=offset + y * 20 - 40,
bg=COLOR1 if i % 2 == 0 else COLOR2,
)
disp.print(">", posy=20, fg=color.COMMYELLOW, bg=COLOR2 if idx % 2 == 0 else COLOR1)
disp.update()
def main():
disp = display.open()
applist = list_apps()
numapps = len(applist)
current = 0
for ev in button_events():
if ev == buttons.BOTTOM_RIGHT:
# Scroll down
draw_menu(disp, applist, current, -8)
current = (current + 1) % numapps
elif ev == buttons.BOTTOM_LEFT:
# Scroll up
draw_menu(disp, applist, current, 8)
current = (current + numapps - 1) % numapps
elif ev == buttons.TOP_RIGHT:
# Select & start
disp.clear().update()
disp.close()
try:
os.exec(applist[current])
except OSError as e:
print("Loading failed: ", e)
os.exit(1)
draw_menu(disp, applist, current, 0)
if __name__ == "__main__":
main()