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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use gio_sys;
use glib::object::ObjectType as ObjectType_;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use glib_sys;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem::transmute;

glib_wrapper! {
    /// `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`](../glib/object/trait.ObjectExt.html)
    pub struct AppInfoMonitor(Object<gio_sys::GAppInfoMonitor, AppInfoMonitorClass>);

    match fn {
        get_type => || gio_sys::g_app_info_monitor_get_type(),
    }
}

impl 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 get() -> AppInfoMonitor {
        unsafe { from_glib_full(gio_sys::g_app_info_monitor_get()) }
    }

    /// Signal emitted when the app info database for changes (ie: newly installed
    /// or removed applications).
    pub fn connect_changed<F: Fn(&AppInfoMonitor) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn changed_trampoline<F: Fn(&AppInfoMonitor) + 'static>(
            this: *mut gio_sys::GAppInfoMonitor,
            f: glib_sys::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"changed\0".as_ptr() as *const _,
                Some(transmute(changed_trampoline::<F> as usize)),
                Box_::into_raw(f),
            )
        }
    }
}

impl fmt::Display for AppInfoMonitor {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "AppInfoMonitor")
    }
}