Add reactive screen observer (appear/vanish/change)#225
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| Metric | Results |
|---|---|
| Complexity | 91 |
| Duplication | 4 |
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Round-2 web-research follow-up, batch 7 — a non-blocking screen observer (SikuliX
observemodel), wired through all five layers (facade,AC_*, MCP, Script Builder) with headless tests + EN/Zh v17 docs + README sections.Feature (
utils/observer)ScreenObserver— register watches that fire on appear / vanish / change of a value and run a callback;add/remove/names/poll_once/start/stop/fired. Complements the blockingwait_for_*family — react to dialogs/progress/status while the main flow continues.predicate(truthy = present); transition logic is unit-tested viapoll_once()with synthetic values, no real screen. Built-inimage_predicate/text_predicate/pixel_predicatewrap the existing locate/OCR/pixel helpers; errors are swallowed so the poll loop survives.AC_observe_add(kind=image/text/pixel, event=appear/vanish/change, runsactions— the watchdog pattern generalised to screen content) /AC_observe_remove/list/poll/start/stop+ac_observe_*.Verification
test/unit_test/headless/test_observer_batch.py— 7 tests pass (transition matrix, event filtering, error resilience, remove/names/log, full wiring).import je_auto_controlPySide6-free.