Package ch.bailu.gtk.gio

Klasse AppInfoMonitor

java.lang.Object
ch.bailu.gtk.type.Type
ch.bailu.gtk.type.Pointer
ch.bailu.gtk.gobject.Object
ch.bailu.gtk.type.PropertyHolder
ch.bailu.gtk.gio.AppInfoMonitor
Alle implementierten Schnittstellen:
PointerInterface
public class AppInfoMonitor extends PropertyHolder
`GAppInfoMonitor` monitors application information for changes.

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

Call [func@Gio.AppInfoMonitor.get] to get a `GAppInfoMonitor` and connect
to the [signal@Gio.AppInfoMonitor::changed] signal. The signal will be emitted once when
the app info database changes, and will not be emitted again until after the
next call to [func@Gio.AppInfo.get_all] or another `g_app_info_*()` function.
This is because monitoring the app info database for changes is expensive.

The following functions will re-arm the [signal@Gio.AppInfoMonitor::changed]
signal so it can be emitted again:

- [func@Gio.AppInfo.get_all]
- [func@Gio.AppInfo.get_all_for_type]
- [func@Gio.AppInfo.get_default_for_type]
- [func@Gio.AppInfo.get_fallback_for_type]
- [func@Gio.AppInfo.get_recommended_for_type]
- [`g_desktop_app_info_get_implementations()`](../gio-unix/type_func.DesktopAppInfo.get_implementation.html)
- [`g_desktop_app_info_new()`](../gio-unix/ctor.DesktopAppInfo.new.html)
- [`g_desktop_app_info_new_from_filename()`](../gio-unix/ctor.DesktopAppInfo.new_from_filename.html)
- [`g_desktop_app_info_new_from_keyfile()`](../gio-unix/ctor.DesktopAppInfo.new_from_keyfile.html)
- [`g_desktop_app_info_search()`](../gio-unix/type_func.DesktopAppInfo.search.html)

The latter functions are available if using
[`GDesktopAppInfo`](../gio-unix/class.DesktopAppInfo.html) from
`gio-unix-2.0.pc` (GIR namespace `GioUnix-2.0`).

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 `GAppInfo` APIs
in response to the change signal, deferring these until the time that
the updated data is actually required. The exception to this case is when
application information is actually being displayed on the screen
(for example, 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.

https://docs.gtk.org/gio/class.AppInfoMonitor.html

  • Felddetails

  • Konstruktordetails

  • Methodendetails

    • getClassHandler

      public static ClassHandler getClassHandler()

    • onChanged

      public SignalHandler onChanged(AppInfoMonitor.OnChanged signal)
      Connect to signal "changed".
      See AppInfoMonitor.OnChanged.onChanged() for signal description.
      Field SIGNAL_ON_CHANGED contains original signal name and can be used as resource reference.
      Parameter:
      signal - callback function (lambda).
      Gibt zurück:
      SignalHandler. Can be used to disconnect signal and to release callback function.

    • get

      public static AppInfoMonitor get()
      Gets the #GAppInfoMonitor for the current thread-default main
      context.

      The #GAppInfoMonitor will emit a “changed” signal in the
      thread-default main context whenever the list of installed
      applications (as reported by g_app_info_get_all()) may have changed.

      The #GAppInfoMonitor::changed signal will only be emitted once until
      g_app_info_get_all() (or another `g_app_info_*()` function) is called. Doing
      so will re-arm the signal ready to notify about the next change.

      You must only call g_object_unref() on the return value from under
      the same main context as you created it.
      Gibt zurück:
      a reference to a #GAppInfoMonitor

    • getTypeID

      public static long getTypeID()

    • getParentTypeID

      public static long getParentTypeID()

    • getTypeSize

      public static TypeSystem.TypeSize getTypeSize()

    • getParentTypeSize

      public static TypeSystem.TypeSize getParentTypeSize()

    • getInstanceSize

      public static int getInstanceSize()