| Copyright | Will Thompson and Iñaki García Etxebarria |
|---|---|
| License | LGPL-2.1 |
| Maintainer | Iñaki García Etxebarria |
| Safe Haskell | Safe-Inferred |
| Language | Haskell2010 |
GI.Gio.Objects.AppInfoMonitor
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
- appInfoMonitorGet :: (HasCallStack, MonadIO m) => m AppInfoMonitor
- type AppInfoMonitorChangedCallback = IO ()
- afterAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> ((?self :: a) => AppInfoMonitorChangedCallback) -> m SignalHandlerId
- onAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> ((?self :: a) => AppInfoMonitorChangedCallback) -> m SignalHandlerId
Exported types
newtype AppInfoMonitor Source #
Memory-managed wrapper type.
Constructors
| AppInfoMonitor (ManagedPtr AppInfoMonitor) |
Instances
| Eq AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor Methods (==) :: AppInfoMonitor -> AppInfoMonitor -> Bool # (/=) :: AppInfoMonitor -> AppInfoMonitor -> Bool # | |
| GObject AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor | |
| ManagedPtrNewtype AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor Methods toManagedPtr :: AppInfoMonitor -> ManagedPtr AppInfoMonitor # | |
| TypedObject AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor | |
| HasParentTypes AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor | |
| IsGValue (Maybe AppInfoMonitor) Source # | Convert |
Defined in GI.Gio.Objects.AppInfoMonitor Methods gvalueGType_ :: IO GType # gvalueSet_ :: Ptr GValue -> Maybe AppInfoMonitor -> IO () # gvalueGet_ :: Ptr GValue -> IO (Maybe AppInfoMonitor) # | |
| type ParentTypes AppInfoMonitor Source # | |
Defined in GI.Gio.Objects.AppInfoMonitor | |
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 # | |
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.
Methods
Click to display all available methods, including inherited ones
Methods
bindProperty, bindPropertyFull, forceFloating, freezeNotify, getv, isFloating, notify, notifyByPspec, ref, refSink, runDispose, stealData, stealQdata, thawNotify, unref, watchClosure.
Getters
getData, getProperty, getQdata.
Setters
get
Arguments
| :: (HasCallStack, MonadIO m) | |
| => m AppInfoMonitor | Returns: a reference to a |
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).
afterAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> ((?self :: 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
By default the object invoking the signal is not passed to the callback.
If you need to access it, you can use the implit ?self parameter.
Note that this requires activating the ImplicitParams GHC extension.
onAppInfoMonitorChanged :: (IsAppInfoMonitor a, MonadIO m) => a -> ((?self :: 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