fix: on-close event handler not be triggered on flutter >= 3.10 #343
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This PR adds a workaround to remove the
delete-event
handlers in the flutter engine on Linux, which breaks the propagation ofon-close
event.Note that it only happens on flutter >= 3.10, and the problem is brought by flutter/engine#40033 (comment).
Future: this pr may break some latest api provided by Flutter, but currently we must fix the
setPreventClose
to ensure the validity of this important and core function. latest api: flutter/flutter#30735