feat(simulator): add GUI runner, stubs, and workspace assets

Add host simulator scaffolding, examples, and docs so led-driver main can run end-to-end with MicroPython module stubs.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
2026-05-04 22:48:54 +12:00
parent 7ce56b64df
commit 42c14361e8
20 changed files with 513 additions and 0 deletions

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gui_main.py Normal file
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#!/usr/bin/env python3
"""
Graphical NeoPixel simulator for led-driver (CPython).
Treats ``led-driver/src`` as flash root (``/``) and ``led-driver/lib`` as ``/lib``.
**Start** runs the full application: ``led-driver/src/main.py`` as ``__main__``
(``asyncio.run(main(port=…))``) — same startup as the device: ``settings``,
``presets.json``, default preset, ``patterns/``, WebSocket, UDP hello, etc.
"""
from __future__ import annotations
import os
import queue
import runpy
import shutil
import sys
import threading
import tkinter as tk
from pathlib import Path
from tkinter import messagebox, ttk
# --- Paths (before importing driver code) ---
SIM_ROOT = Path(__file__).resolve().parent
WORKSPACE = SIM_ROOT / "workspace"
STUBS_ROOT = SIM_ROOT / "stubs"
DRIVER_ROOT = SIM_ROOT.parent / "led-driver"
DRIVER_SRC = DRIVER_ROOT / "src"
DRIVER_LIB = DRIVER_ROOT / "lib"
DRIVER_MAIN = DRIVER_SRC / "main.py"
DEFAULT_SETTINGS = SIM_ROOT / "settings.default.json"
def _ensure_workspace_dirs():
WORKSPACE.mkdir(parents=True, exist_ok=True)
(WORKSPACE / "patterns").mkdir(parents=True, exist_ok=True)
settings_path = WORKSPACE / "settings.json"
if not settings_path.is_file() and DEFAULT_SETTINGS.is_file():
shutil.copy2(DEFAULT_SETTINGS, settings_path)
presets_path = WORKSPACE / "presets.json"
if not presets_path.is_file():
presets_path.write_text("{}\n", encoding="utf-8")
def _install_driver_path_and_stubs():
"""``/lib`` then ``/`` then stubs (MicroPython search order, stubs win)."""
for p in (DRIVER_LIB, DRIVER_SRC, STUBS_ROOT):
sys.path.insert(0, str(p))
def _patch_settings_path():
_ensure_workspace_dirs()
import settings as led_settings
led_settings.Settings.SETTINGS_FILE = str(WORKSPACE / "settings.json")
_install_driver_path_and_stubs()
_patch_settings_path()
import neopixel as neopixel_stub # noqa: E402
def _ensure_src_symlinks():
"""If flash root (``src``) has no ``patterns`` / ``presets.json``, link workspace copies."""
_ensure_workspace_dirs()
pat_ws = WORKSPACE / "patterns"
pat_link = DRIVER_SRC / "patterns"
if not pat_link.exists():
pat_link.symlink_to(pat_ws.resolve(), target_is_directory=True)
elif pat_link.is_symlink():
pass
# Real directory: treat as on-device flash (do not replace).
pr_ws = WORKSPACE / "presets.json"
if not pr_ws.is_file():
pr_ws.write_text("{}\n", encoding="utf-8")
pr_link = DRIVER_SRC / "presets.json"
if not pr_link.exists():
pr_link.symlink_to(pr_ws.resolve())
class LedSimulatorApp:
def __init__(self):
_ensure_workspace_dirs()
self.root = tk.Tk()
self.root.title("led-simulator — led-driver (full app)")
self.root.minsize(640, 280)
self._pixel_queue: queue.Queue[list[tuple[int, int, int]] | None] = queue.Queue()
self._driver_thread: threading.Thread | None = None
self._driver_running = False
self._ws_port = tk.IntVar(value=8765)
self._status = tk.StringVar(
value="Idle — Start runs the full main.py (settings, presets, patterns/, /ws)."
)
self._canvas_leds: list[int] = []
self._build_ui()
self._install_pixel_sink()
self.root.after(50, self._pump_pixels)
self.root.protocol("WM_DELETE_WINDOW", self._on_quit)
def _build_ui(self):
top = ttk.Frame(self.root, padding=8)
top.pack(fill=tk.X)
row = ttk.Frame(top)
row.pack(fill=tk.X)
ttk.Button(row, text="Start", command=self._on_start).pack(side=tk.LEFT, padx=(0, 6))
ttk.Button(row, text="Stop", command=self._on_stop).pack(side=tk.LEFT, padx=(0, 16))
ttk.Label(row, text="HTTP / WS port:").pack(side=tk.LEFT)
ttk.Spinbox(row, from_=1024, to=65535, textvariable=self._ws_port, width=8).pack(
side=tk.LEFT, padx=4
)
ttk.Label(row, text="(Microdot; path /ws)").pack(side=tk.LEFT, padx=8)
hint = ttk.Label(
top,
text=(
"Flash root is led-driver/src: edit workspace/settings.json, presets.json, "
"and patterns/ (or use files already under src/)."
),
wraplength=620,
justify=tk.LEFT,
)
hint.pack(fill=tk.X, pady=(8, 0))
self._canvas = tk.Canvas(self.root, height=120, background="#1a1a1a", highlightthickness=0)
self._canvas.pack(fill=tk.BOTH, expand=True, padx=8, pady=(0, 8))
st = ttk.Label(self.root, textvariable=self._status, padding=(8, 0, 8, 8))
st.pack(fill=tk.X)
def _install_pixel_sink(self):
def sink(buf: list[tuple[int, int, int]]):
self._pixel_queue.put(buf)
neopixel_stub.PIXEL_SINK = sink
def _pump_pixels(self):
try:
while True:
buf = self._pixel_queue.get_nowait()
if buf is None:
self._draw_leds([(0, 0, 0)] * max(1, len(self._canvas_leds)))
else:
self._draw_leds(buf)
except queue.Empty:
pass
self.root.after(50, self._pump_pixels)
def _draw_leds(self, buf: list[tuple[int, int, int]]):
self._canvas.delete("led")
n = len(buf)
if n == 0:
return
cw = self._canvas.winfo_width() or 700
margin = 12
usable = max(40, cw - 2 * margin)
gap = 4
diam = max(6, min(22, (usable - (n - 1) * gap) // n))
y = 50
total_w = n * diam + (n - 1) * gap
x0 = max(margin, (cw - total_w) // 2)
self._canvas_leds = []
for i, (r, g, b) in enumerate(buf):
x = x0 + i * (diam + gap)
fill = f"#{r:02x}{g:02x}{b:02x}"
outline = "#444444" if (r + g + b) > 40 else "#666666"
oid = self._canvas.create_oval(
x, y, x + diam, y + diam, fill=fill, outline=outline, width=1, tags="led"
)
self._canvas_leds.append(oid)
def _run_main_py_thread(self, port: int):
try:
try:
import led_driver_sim_hook as sim_hook
sim_hook.clear_app()
except ImportError:
pass
os.environ["LED_SIM_PORT"] = str(port)
os.environ["LED_SIM_ROOT"] = str(SIM_ROOT)
runpy.run_path(str(DRIVER_MAIN), run_name="__main__")
except Exception as ex: # noqa: BLE001
self.root.after(0, lambda e=ex: messagebox.showerror("Simulator", str(e)))
finally:
for key in ("LED_SIM_PORT", "LED_SIM_ROOT"):
os.environ.pop(key, None)
try:
import led_driver_sim_hook as sim_hook
sim_hook.clear_app()
except ImportError:
pass
self._driver_running = False
self._pixel_queue.put(None)
self.root.after(0, lambda: self._status.set("Stopped."))
def _on_start(self):
if self._driver_running:
messagebox.showwarning("Simulator", "Already running — press Stop first.")
return
for k in list(sys.modules):
if k.startswith("patterns."):
del sys.modules[k]
_ensure_src_symlinks()
os.chdir(DRIVER_SRC)
port = int(self._ws_port.get())
self._driver_running = True
self.root.after(
0,
lambda p=port: self._status.set(
f"Running full app (main.py) — ws://127.0.0.1:{p}/ws"
),
)
self._driver_thread = threading.Thread(
target=self._run_main_py_thread,
args=(port,),
daemon=True,
)
self._driver_thread.start()
def _on_stop(self):
try:
import led_driver_sim_hook as sim_hook
app = sim_hook.get_app()
if app is not None and getattr(app, "server", None):
app.shutdown()
except ImportError:
pass
def _on_quit(self):
self._on_stop()
self.root.destroy()
def run(self):
self.root.mainloop()
def main():
if not DRIVER_SRC.is_dir() or not DRIVER_MAIN.is_file():
print("led-driver/src/main.py not found next to led-simulator.", file=sys.stderr)
sys.exit(1)
if not DRIVER_LIB.is_dir():
print("led-driver/lib not found next to led-simulator.", file=sys.stderr)
sys.exit(1)
app = LedSimulatorApp()
app.run()
if __name__ == "__main__":
main()