This GtkApplication displays an image file from the current directory.
If the image file isn't loaded successfully, the image will contain a "broken image" icon. The
#!/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 ImageExample {
/* Create the application itself
This boilerplate code is needed to build any GTK+ application. */
constructor() {
this.application = new Gtk.Application ({
application_id: 'org.example.jsimage',
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: "Welcome to GNOME",
default_height: 300,
default_width: 300
});
// Create the label
this.jsimage = new Gtk.Image ({file: "gnome-image.png"});
this._window.add (this.jsimage);
// Show the window and all child widgets
this._window.show_all();
}
};
// Run the application
let app = new ImageExample ();
app.application.run (ARGV);
In this sample we used the following:
Gtk.Application
Gtk.ApplicationWindow
Gtk.Image