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#!/usr/bin/gjs
imports.gi.versions.Gtk = '3.0';
const Gtk = imports.gi.Gtk;
// We start out with 0 cookies
var cookies = 0;
class GettingTheSignal {
// Create the application itself
constructor() {
this.application = new Gtk.Application();
// 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 window when active
_onActivate() {
this._window.present();
}
// Callback function for 'startup' signal 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,
default_height: 200,
default_width: 400,
title: "Click the button to get a cookie!"});
// Create the label
this._cookieLabel = new Gtk.Label ({
label: "Number of cookies: " + cookies });
// Create the cookie button
this._cookieButton = new Gtk.Button ({ label: "Get a cookie" });
// Connect the cookie button to the function that handles clicking it
this._cookieButton.connect ('clicked', this._getACookie.bind(this));
// Create a grid to arrange everything inside
this._grid = new Gtk.Grid ({
halign: Gtk.Align.CENTER,
valign: Gtk.Align.CENTER,
row_spacing: 20 });
// Put everything inside the grid
this._grid.attach (this._cookieButton, 0, 0, 1, 1);
this._grid.attach (this._cookieLabel, 0, 1, 1, 1);
// Add the grid to the window
this._window.add (this._grid);
// Show the window and all child widgets
this._window.show_all();
}
_getACookie() {
// Increase the number of cookies by 1 and update the label
cookies++;
this._cookieLabel.set_label ("Number of cookies: " + cookies);
}
};
// Run the application
let app = new GettingTheSignal ();
app.application.run (ARGV);
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