Enum QuitSource 

#[non_exhaustive]
pub enum QuitSource {
    Application,
    UserQuit,
    SessionEnd,
    Signal,
}

Where a quit request came from, read by a close guard or the application’s on_quit_requested guard through EventContext::quit_source.

A guard that asks the user before closing can skip its dialog when the user is not there to answer: for SessionEnd and Signal it saves directly and lets the close go ahead, as AppKit and Qt applications do when the session is ending.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Application

The application asked: ctx.quit(), ctx.quit_forced(), or the App menu’s Quit row.

UserQuit

The user quit from outside the application’s own controls: macOS’s Dock menu Quit, AppleScript’s quit, or another terminate:; on Windows, taskkill without /F reaching the event loop’s hidden window while a window of the application is open. A guarded quit: a guard can ask, and refuse.

SessionEnd

The session ends (log out, restart, shut down). On macOS a guarded quit (AppKit waits for the answer, and a refusal cancels the logout); on Windows every guard is asked once and cannot refuse, since the session ends whatever the application answers.

Signal

A termination signal on Unix (SIGTERM, SIGHUP), heard while the event loop runs; on Windows, taskkill without /F while no window of the application is open, or the console it runs in closing. Nobody is there to answer: every guard is asked once and cannot refuse.

Trait Implementations

impl Clone for QuitSource

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for QuitSource

impl Debug for QuitSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for QuitSource

impl Hash for QuitSource

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for QuitSource

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for QuitSource