gtkappchooserwidget-test.js

#!/usr/bin/gjs

const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;

const AppChooserWidgetTest = new Lang.Class({
    Name: 'AppChooserWidgetTest',
    _init: function() {
        this.application = new Gtk.Application();

        this.application.connect('activate', Lang.bind(this, this._onActivate));
        this.application.connect('startup', Lang.bind(this, this._onStartup));
    },
    _onActivate: function() {
        this._window.present();
    },
    _onStartup: function() {
        this._window = new Gtk.ApplicationWindow({
            application: this.application,
            title: 'AppChooserWidgetTest',
            default_height: 200,
            default_width: 400,
            window_position: Gtk.WindowPosition.CENTER
        });

        this._window.add(new Gtk.AppChooserWidget({show_all: true}));
        this._window.show_all();
    }
});

const app = new AppChooserWidgetTest();
app.application.run(ARGV);