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#!/usr/bin/gjs
imports.gi.versions.Gtk = '3.0';
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
class ButtonExample {
/* Create the application itself
This boilerplate code is needed to build any GTK+ application. */
constructor() {
this.application = new Gtk.Application ({
application_id: 'org.example.jsbutton',
flags: Gio.ApplicationFlags.FLAGS_NONE
});
// Connect 'activate' and 'startup' signals to the callback functions
this.application.connect('activate', this._onActivate.bind(this));
this.application.connect('startup', this._onStartup.bind(this));
}
// Callback function for 'activate' signal presents windows when active
_onActivate() {
this._window.present ();
}
// Callback function for 'startup' signal initializes menus and builds the UI
_onStartup() {
this._buildUI();
}
// Build the application's UI
_buildUI() {
// Create the application window
this._window = new Gtk.ApplicationWindow ({ application: this.application,
window_position: Gtk.WindowPosition.CENTER,
title: "GNOME Button",
default_height: 50,
default_width: 250 });
// Create the button
this.Button = new Gtk.Button ({label: "Click Me"});
this._window.add (this.Button);
// Bind it to a function that says what to do when the button is clicked
this.Button.connect ("clicked", this._clickHandler.bind(this));
// Show the window and all child widgets
this._window.show_all();
}
// Here's the function that says what happens when the button is clicked
_clickHandler() {
this.Button.set_label ("Clicked!");
}
};
// Run the application
let app = new ButtonExample ();
app.application.run (ARGV);
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