Copyright	Will Thompson Iñaki García Etxebarria and Jonas Platte
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria (inaki@blueleaf.cc)
Safe Haskell	None
Language	Haskell2010

GI.Gio.Objects.AppInfoMonitor

Contents

Exported types
Methods
- get
Signals
- changed

Description

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.

Since: 2.40

Synopsis

newtype AppInfoMonitor = AppInfoMonitor (ManagedPtr AppInfoMonitor)
class (GObject o, IsDescendantOf AppInfoMonitor o) => IsAppInfoMonitor o
toAppInfoMonitor :: (MonadIO m, IsAppInfoMonitor o) => o -> m AppInfoMonitor
noAppInfoMonitor :: Maybe AppInfoMonitor
appInfoMonitorGet :: (HasCallStack, MonadIO m) => m AppInfoMonitor
type AppInfoMonitorChangedCallback = IO ()
type C_AppInfoMonitorChangedCallback = Ptr () -> Ptr () -> IO ()
afterAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> AppInfoMonitorChangedCallback -> m SignalHandlerId
genClosure_AppInfoMonitorChanged :: MonadIO m => AppInfoMonitorChangedCallback -> m (GClosure C_AppInfoMonitorChangedCallback)
mk_AppInfoMonitorChangedCallback :: C_AppInfoMonitorChangedCallback -> IO (FunPtr C_AppInfoMonitorChangedCallback)
noAppInfoMonitorChangedCallback :: Maybe AppInfoMonitorChangedCallback
onAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> AppInfoMonitorChangedCallback -> m SignalHandlerId
wrap_AppInfoMonitorChangedCallback :: AppInfoMonitorChangedCallback -> C_AppInfoMonitorChangedCallback

Exported types

newtype AppInfoMonitor Source #

Memory-managed wrapper type.

Constructors

AppInfoMonitor (ManagedPtr AppInfoMonitor)

Instances

GObject AppInfoMonitor Source #
Instance details Defined in GI.Gio.Objects.AppInfoMonitor Methods gobjectType :: IO GType #
HasParentTypes AppInfoMonitor Source #
Instance details Defined in GI.Gio.Objects.AppInfoMonitor
type ParentTypes AppInfoMonitor Source #
Instance details Defined in GI.Gio.Objects.AppInfoMonitor type ParentTypes AppInfoMonitor = Object ': ([] :: [Type])

class (GObject o, IsDescendantOf AppInfoMonitor o) => IsAppInfoMonitor o Source #

Type class for types which can be safely cast to AppInfoMonitor, for instance with toAppInfoMonitor.

Instances

(GObject o, IsDescendantOf AppInfoMonitor o) => IsAppInfoMonitor o Source #
Instance details Defined in GI.Gio.Objects.AppInfoMonitor

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

Cast to AppInfoMonitor, for types for which this is known to be safe. For general casts, use castTo.

noAppInfoMonitor :: Maybe AppInfoMonitor Source #

A convenience alias for Nothing :: Maybe AppInfoMonitor.

Methods

get

appInfoMonitorGet Source #

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 () Source #

Signal emitted when the app info database for changes (ie: newly installed or removed applications).

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

Type for the callback on the (unwrapped) C side.

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

Connect a signal handler for the “changed” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after appInfoMonitor #changed callback

genClosure_AppInfoMonitorChanged :: MonadIO m => AppInfoMonitorChangedCallback -> m (GClosure C_AppInfoMonitorChangedCallback) Source #

Wrap the callback into a GClosure.

mk_AppInfoMonitorChangedCallback :: C_AppInfoMonitorChangedCallback -> IO (FunPtr C_AppInfoMonitorChangedCallback) Source #

Generate a function pointer callable from C code, from a C_AppInfoMonitorChangedCallback.

noAppInfoMonitorChangedCallback :: Maybe AppInfoMonitorChangedCallback Source #

A convenience synonym for Nothing :: Maybe AppInfoMonitorChangedCallback.

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

Connect a signal handler for the “changed” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on appInfoMonitor #changed callback

wrap_AppInfoMonitorChangedCallback :: AppInfoMonitorChangedCallback -> C_AppInfoMonitorChangedCallback Source #

Wrap a AppInfoMonitorChangedCallback into a C_AppInfoMonitorChangedCallback.