GAppInfoMonitor — Monitor application information for changes



void changed Run First

Object Hierarchy

    ╰── GAppInfoMonitor


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

Call g_app_info_monitor_get() to get a GAppInfoMonitor 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 GAppInfo 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.


g_app_info_monitor_get ()

GAppInfoMonitor *
g_app_info_monitor_get (void);

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.

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


a reference to a GAppInfoMonitor.

[transfer full]

Since: 2.40

Signal Details

The “changed” signal

user_function (GAppInfoMonitor *gappinfomonitor,
               gpointer         user_data)

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



user data set when the signal handler was connected.


Flags: Run First