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refactor(mcp23009e): Migrate menu_navigation example to steami_screen. #395

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refactor(mcp23009e): Migrate menu_navigation example to steami_screen. #395

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76 changes: 28 additions & 48 deletions lib/mcp23009e/examples/menu_navigation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,12 +4,11 @@
UP/DOWN -> move in the menu
RIGHT -> select
LEFT -> go back

The UI stays in the center of the round display to avoid cropped corners.
"""

from time import sleep_ms

import micropython
import ssd1327
from machine import I2C, SPI, Pin
from mcp23009e import MCP23009E
Expand All @@ -23,6 +22,7 @@
MCP23009_LOGIC_LOW,
MCP23009_PULLUP,
)
from steami_screen import Screen, SSD1327Display

# Setup MCP23009E on I2C bus
i2c = I2C(1)
Expand All @@ -34,7 +34,8 @@
dc = Pin("DATA_COMMAND_DISPLAY")
res = Pin("RST_DISPLAY")
cs = Pin("CS_DISPLAY")
display = ssd1327.WS_OLED_128X128_SPI(spi, dc, res, cs)
display = SSD1327Display(ssd1327.WS_OLED_128X128_SPI(spi, dc, res, cs))
screen = Screen(display)

# D-PAD button mapping
BUTTONS = {
Expand All @@ -44,42 +45,32 @@
MCP23009_BTN_RIGHT: "RIGHT",
}

# Keep short labels for a compact centered UI
MENU_ITEMS = [
("Battery", "4.01 V"),
("Press", "1013 hPa"),
("Hum", "48.6 %"),
("Battery", 4.01, "V"),
("Press", 1013, "hPa"),
("Hum", 48.6, "%"),
]

# Central safe area for the round display
X0 = 28
TITLE_Y = 28
ITEM_Y = 46
ITEM_SPACING = 14
FOOTER_Y = 92


def setup_buttons():
"""Configure all D-PAD buttons as inputs with pull-ups."""
for pin_number in BUTTONS:
mcp.setup(pin_number, MCP23009_DIR_INPUT, pullup=MCP23009_PULLUP)


@micropython.native
def is_any_pressed():
for pin_number in BUTTONS: # noqa: SIM110
if mcp.get_level(pin_number) == MCP23009_LOGIC_LOW:
return True
return False


def wait_all_released():
"""Wait until all buttons are released."""
while True:
all_released = True
for pin_number in BUTTONS:
if mcp.get_level(pin_number) == MCP23009_LOGIC_LOW:
all_released = False
break
if all_released:
return
while is_any_pressed():
sleep_ms(20)


def wait_for_button():
"""Wait for a button press and return its name."""
wait_all_released()

while True:
Expand All @@ -92,35 +83,24 @@ def wait_for_button():


def draw_menu(selected_index):
"""Draw the centered menu."""
display.fill(0)

display.text("MENU", 48, TITLE_Y, 15)

for index, (label, _) in enumerate(MENU_ITEMS):
y = ITEM_Y + index * ITEM_SPACING
prefix = ">" if index == selected_index else " "
display.text(prefix + label, X0, y, 15)

display.text("R:OK L:BACK", 24, FOOTER_Y, 8)
display.show()
labels = [label for label, _, _ in MENU_ITEMS]
screen.clear()
screen.title("MENU")
screen.menu(labels, selected=selected_index)
screen.subtitle("R:OK", "L:Back")
screen.show()


def draw_detail(selected_index):
"""Draw the centered detail screen."""
name, value = MENU_ITEMS[selected_index]

display.fill(0)

display.text(name, 44, 34, 15)
display.text(value, 34, 56, 15)
display.text("LEFT BACK", 34, 88, 8)

display.show()
name, val, unit = MENU_ITEMS[selected_index]
screen.clear()
screen.title(name)
screen.value(val, unit=unit)
screen.subtitle("L:Back")
screen.show()


def main():
"""Main UI loop."""
setup_buttons()

selected_index = 0
Expand Down
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