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Restore left-edge tap navigation in display rotator #38

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Restore left-edge tap navigation in display rotator #38

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98e1c1a
Initial plan
Codex Mar 1, 2026
912baff
fix: calibrate touch detection width dynamically
Codex Mar 1, 2026
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13 changes: 10 additions & 3 deletions display_rotator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -356,17 +356,20 @@ def touch_worker(cmd_q: "queue.Queue[str]", stop_evt: threading.Event, touch_wid
print(f"[rotator] Touch controls listening on {device} (width {device_touch_width})", flush=True)

last_x = device_touch_min + (device_touch_width // 2)
min_seen = device_touch_min
max_seen = device_touch_min + device_touch_width - 1
touch_down = False
last_tap_ts = None
last_emit = 0.0

def emit_tap(tap_x: int, now: float) -> None:
nonlocal last_tap_ts, last_emit
relative_x = tap_x - device_touch_min
width = max(2, max_seen - min_seen + 1)
relative_x = tap_x - min_seen
if relative_x < 0:
relative_x = 0
elif relative_x >= device_touch_width:
relative_x = device_touch_width - 1
elif relative_x >= width:
relative_x = width - 1

if last_tap_ts is not None and (now - last_tap_ts) <= DOUBLE_TAP_WINDOW_SECS:
if (now - last_emit) >= tap_debounce_secs:
Expand Down Expand Up @@ -395,6 +398,10 @@ def emit_tap(tap_x: int, now: float) -> None:

if ev_type == EV_ABS and ev_code in (ABS_X, ABS_MT_POSITION_X):
last_x = ev_value
if ev_value < min_seen:
min_seen = ev_value
if ev_value > max_seen:
max_seen = ev_value
elif ev_type == EV_KEY and ev_code == BTN_TOUCH:
if ev_value == 1:
touch_down = True
Expand Down