1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#!/usr/bin/gjs
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
// We start out with 0 cookies
var cookies = 0;
const GettingTheSignal = new Lang.Class({
Name: 'Getting the Signal',
// Create the application itself
_init: function() {
this.application = new Gtk.Application();
// Connect 'activate' and 'startup' signals to the callback functions
this.application.connect('activate', Lang.bind(this, this._onActivate));
this.application.connect('startup', Lang.bind(this, this._onStartup));
},
// Callback function for 'activate' signal presents window when active
_onActivate: function() {
this._window.present();
},
// Callback function for 'startup' signal builds the UI
_onStartup: function() {
this._buildUI ();
},
// Build the application's UI
_buildUI: function() {
// 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', Lang.bind (this, this._getACookie));
// 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: function() {
// 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);
|
