gi-gio-2.0.24: Gio bindings

CopyrightWill Thompson Iñaki García Etxebarria and Jonas Platte
LicenseLGPL-2.1
MaintainerIñaki García Etxebarria (inaki@blueleaf.cc)
Safe HaskellNone
LanguageHaskell2010

GI.Gio.Objects.AppInfoMonitor

Contents

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

Exported types

newtype AppInfoMonitor Source #

Memory-managed wrapper 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.

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.

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

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