Struct gio::AppInfoMonitor

pub struct AppInfoMonitor(_, _);

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

Call AppInfoMonitor::get 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.

Implements

glib::object::ObjectExt

Methods

impl AppInfoMonitor

pub fn get() -> 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 AppInfo::get_all) may have changed.

You must only call gobject::ObjectExt::unref on the return value from under the same main context as you created it.

Returns

a reference to a AppInfoMonitor

pub fn connect_changed<F: Fn(&AppInfoMonitor) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

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

Trait Implementations

impl Clone for AppInfoMonitor

fn clone(&self) -> AppInfoMonitor

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AppInfoMonitor

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Display for AppInfoMonitor

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for AppInfoMonitor

impl Hash for AppInfoMonitor

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Ord for AppInfoMonitor

fn cmp(&self, other: &AppInfoMonitor) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use] fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use] fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use] fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<T: ObjectType> PartialEq<T> for AppInfoMonitor

fn eq(&self, other: &T) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<T: ObjectType> PartialOrd<T> for AppInfoMonitor

fn partial_cmp(&self, other: &T) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use] fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use] fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use] fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use] fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for AppInfoMonitor

fn static_type() -> Type

Returns the type identifier of Self.