GI.Gio.Objects.AppInfoMonitor

AppInfoMonitor is a very simple object used for monitoring the app info database for changes (ie: newly installed or removed applications).

Call appInfoMonitorGet to get a AppInfoMonitor and connect to the "changed" signal.

In the usual case, applications should try to make note of the change (doing things like invalidating caches) but not act on it. In particular, applications should avoid making calls to AppInfo APIs in response to the change signal, deferring these until the time that the data is actually required. The exception to this case is when application information is actually being displayed on the screen (eg: during a search or when the list of all applications is shown). The reason for this is that changes to the list of installed applications often come in groups (like during system updates) and rescanning the list on every change is pointless and expensive.

Exported types

newtype AppInfoMonitor

Constructors

AppInfoMonitor (ManagedPtr AppInfoMonitor)

Instances

GObject AppInfoMonitor

Methods

gobjectType :: AppInfoMonitor -> IO GType

IsObject AppInfoMonitor

IsAppInfoMonitor AppInfoMonitor

class GObject o => IsAppInfoMonitor o

Instances

(GObject a, UnknownAncestorError Constraint AppInfoMonitor a) => IsAppInfoMonitor a

IsAppInfoMonitor AppInfoMonitor

toAppInfoMonitor :: (MonadIO m, IsAppInfoMonitor o) => o -> m AppInfoMonitor

noAppInfoMonitor :: Maybe AppInfoMonitor

Methods

get

appInfoMonitorGet

Arguments

:: (HasCallStack, MonadIO m)

=> m AppInfoMonitor

Returns: a reference to a AppInfoMonitor

Gets the AppInfoMonitor for the current thread-default main context.

The AppInfoMonitor will emit a "changed" signal in the thread-default main context whenever the list of installed applications (as reported by appInfoGetAll) may have changed.

You must only call objectUnref on the return value from under the same main context as you created it.

Since: 2.40

Signals

changed

type AppInfoMonitorChangedCallback = IO ()

type C_AppInfoMonitorChangedCallback = Ptr () -> Ptr () -> IO ()

afterAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> AppInfoMonitorChangedCallback -> m SignalHandlerId

genClosure_AppInfoMonitorChanged :: AppInfoMonitorChangedCallback -> IO Closure

mk_AppInfoMonitorChangedCallback :: C_AppInfoMonitorChangedCallback -> IO (FunPtr C_AppInfoMonitorChangedCallback)

noAppInfoMonitorChangedCallback :: Maybe AppInfoMonitorChangedCallback

onAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> AppInfoMonitorChangedCallback -> m SignalHandlerId

wrap_AppInfoMonitorChangedCallback :: AppInfoMonitorChangedCallback -> Ptr () -> Ptr () -> IO ()