Application.addOnQueryEnd

Emitted when the session manager is about to end the session, only if register-session is TRUE. Applications can connect to this signal and call Application.inhibit with GTK_APPLICATION_INHIBIT_LOGOUT to delay the end of the session until state has been saved.

class Application
gulong
addOnQueryEnd
(
void delegate dlg
,
ConnectFlags connectFlags = cast(ConnectFlags)0
)

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Since

3.24.8