#!/usr/bin/gjs
imports.gi.versions.Gtk = '3.0';
const Gio = imports.gi.Gio;
const Gtk = imports.gi.Gtk;
class MessageDialogExample {
// Create the application itself
constructor() {
this.application = new Gtk.Application({
application_id: 'org.example.jsmessagedialog',
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._initMenus();
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: "Gtk.MessageDialog Example",
default_height: 200,
default_width: 400
});
// Create a silly warning message and add it to the window
this.warningLabel = new Gtk.Label({
label: "This application goes boom! (Not really.)"
});
this._window.add (this.warningLabel);
// Show the window and all child widgets
this._window.show_all();
}
// Build the application menu, including the button that calls the dialog
_initMenus() {
let menu = new Gio.Menu();
menu.append("Message",'app.message');
menu.append("Quit",'app.quit');
this.application.set_app_menu(menu);
// This pops up a MessageDialog when "Message" is clicked in the menu
let messageAction = new Gio.SimpleAction ({ name: 'message' });
messageAction.connect('activate', () => { this._showMessageDialog(); });
this.application.add_action(messageAction);
// This closes the window when "Quit" is clicked in the menu
let quitAction = new Gio.SimpleAction ({ name: 'quit' });
quitAction.connect('activate', () => { this._window.destroy(); });
this.application.add_action(quitAction);
}
_showMessageDialog() {
// Create a modal MessageDialog whose parent is the window
this._messageDialog = new Gtk.MessageDialog ({
transient_for: this._window,
modal: true,
buttons: Gtk.ButtonsType.OK_CANCEL,
message_type: Gtk.MessageType.WARNING,
text: "This action will cause the universe to stop existing." });
this._messageDialog.connect ('response', this._response_cb.bind(this));
this._messageDialog.show();
}
// Callback function (aka signal handler) for the response signal
_response_cb(messagedialog, response_id) {
// A simple switch that changes the main window's label
switch (response_id) {
case Gtk.ResponseType.OK:
this.warningLabel.set_label ("*BOOM*\n");
break;
case Gtk.ResponseType.CANCEL:
this.warningLabel.set_label ("Good choice!\n");
break;
case Gtk.ResponseType.DELETE_EVENT:
this.warningLabel.set_label ("Dialog closed or cancelled.\n");
break;
}
this._messageDialog.destroy();
}
};
// Run the application
let app = new MessageDialogExample ();
app.application.run (ARGV);