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fix(display): a frame the preview throttle skipped still reaches the snapshot (#752)

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A screen that draws its card once and holds it no longer leaves the web preview black: DisplayManager remembers a changed frame the snapshot throttle skipped, and the render loop writes it (write_owed_snapshot(), called from _display_once) once the interval has passed. A failed owed write stays owed and is retried.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-10-04 14:41:47 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 7026eeb156
commit e09e251553
4 changed files with 257 additions and 2 deletions
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src/display_controller.py
+7
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@@ -1230,6 +1230,13 @@ class DisplayController:
note = getattr(self.plugin_manager, 'note_display_duration', None)
if note is not None and plugin_id:
note(plugin_id, time.monotonic() - started)
# A screen that drew once and holds makes no more
# update_display() calls, so a frame the preview throttle
# skipped would otherwise never reach the snapshot.
write_owed = getattr(getattr(self, 'display_manager', None),
'write_owed_snapshot', None)
if write_owed is not None:
write_owed()
def _health_tracker(self):
"""The plugin circuit breaker, or None when it is not enabled."""