Struct Observer

pub struct Observer { /* private fields */ }

Used to wait for a widget’s signal.

It’s recommended to use it with the [observer_new] macro.

Example:

extern crate gtk;
#[macro_use]
extern crate gtk_test;

use gtk::prelude::GtkWindowExt;

gtk::init().expect("initialization failed");
let window = gtk::Window::new(gtk::WindowType::Toplevel);

let observer = observer_new!(window, connect_activate_focus, |_|);
window.emit_activate_focus();
observer.wait();

Implementations

impl Observer

pub fn new() -> Observer

Returns a new observer.

It’s recommended to not use it directly as is but instead to use the [observer_new] macro.

But anyway, here’s an example using it as is:

extern crate gtk;
#[macro_use]
extern crate gtk_test;

use gtk::prelude::GtkWindowExt;

gtk::init().expect("GTK init failed");

let window = gtk::Window::new(gtk::WindowType::Toplevel);

let observer = gtk_test::Observer::new();
let inner = observer.get_inner().clone();
window.connect_activate_focus(move |_| {
    *inner.borrow_mut() = true;
});

window.emit_activate_focus();
observer.wait();

pub fn get_inner(&self) -> &Rc<RefCell<bool>>

Returns the inner field. Just don’t use it.

pub fn wait(&self)

Wait for the signal to be triggered.

extern crate gtk;
#[macro_use]
extern crate gtk_test;

use gtk::prelude::GtkWindowExt;

gtk::init().expect("initialization failed");
let window = gtk::Window::new(gtk::WindowType::Toplevel);

let observer = observer_new!(window, connect_activate_focus, |_|);
window.emit_activate_focus();
observer.wait();

Trait Implementations

impl Default for Observer

fn default() -> Self

Returns the “default value” for a type.