1<?xml version="1.0" encoding="utf-8"?> 2<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="spinner.js" xml:lang="sv"> 3 <info> 4 <title type="text">Spinner (Javascript)</title> 5 <link type="guide" xref="beginner.js#display-widgets"/> 6 <revision version="0.1" date="2012-06-03" status="draft"/> 7 8 <credit type="author copyright"> 9 <name>Taryn Fox</name> 10 <email its:translate="no">jewelfox@fursona.net</email> 11 <years>2012</years> 12 </credit> 13 14 <desc>En animerad väntesnurra</desc> 15 16 <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright"> 17 <mal:name>Sebastian Rasmussen</mal:name> 18 <mal:email>sebras@gmail.com</mal:email> 19 <mal:years>2019</mal:years> 20 </mal:credit> 21 22 <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright"> 23 <mal:name>Anders Jonsson</mal:name> 24 <mal:email>anders.jonsson@norsjovallen.se</mal:email> 25 <mal:years>2021</mal:years> 26 </mal:credit> 27 </info> 28 29 <title>Spinner</title> 30 <media type="image" mime="image/png" src="media/spinner.png"/> 31 <p>Denna Spinner stoppas och startas genom tryck på blankstegstangenten.</p> 32 33<code mime="application/javascript" style="numbered">#!/usr/bin/gjs 34 35imports.gi.versions.Gdk = '3.0'; 36imports.gi.versions.Gtk = '3.0'; 37 38const Gio = imports.gi.Gio; 39const GLib = imports.gi.GLib; 40const Gtk = imports.gi.Gtk; 41const Gdk = imports.gi.Gdk; 42 43class SpinnerExample { 44 45 // Create the application itself 46 constructor() { 47 this.application = new Gtk.Application({ 48 application_id: 'org.example.jsspinner', 49 flags: Gio.ApplicationFlags.FLAGS_NONE 50 }); 51 52 // Connect 'activate' and 'startup' signals to the callback functions 53 this.application.connect('activate', this._onActivate.bind(this)); 54 this.application.connect('startup', this._onStartup.bind(this)); 55 } 56 57 // Callback function for 'activate' signal presents windows when active 58 _onActivate() { 59 this._window.present(); 60 } 61 62 // Callback function for 'startup' signal builds the UI 63 _onStartup() { 64 this._buildUI(); 65 } 66 67 // Build the application's UI 68 _buildUI() { 69 70 // Create the application window 71 this._window = new Gtk.ApplicationWindow({ 72 application: this.application, 73 window_position: Gtk.WindowPosition.CENTER, 74 title: "Spinner Example", 75 default_height: 200, 76 default_width: 200, 77 border_width: 30 78 }); 79 80 // Create a spinner which starts spinning automatically 81 this._spinner = new Gtk.Spinner ({active: true}); 82 this._window.add (this._spinner); 83 84 // Connect a keypress event to the function that makes it start or stop spinning 85 this._window.connect("key-press-event", this._onKeyPress.bind(this)); 86 87 // Show the window and all child widgets 88 this._window.show_all(); 89 } 90 91 _onKeyPress(widget, event) { 92 93 // Get the value of the key that was pressed 94 let [, keyval] = event.get_keyval(); 95 96 // If it was the spacebar, toggle the spinner to start or stop 97 if (keyval == Gdk.KEY_space) { 98 if (this._spinner.active == true) 99 this._spinner.stop(); 100 else 101 this._spinner.start(); 102 } 103 } 104}; 105 106// Run the application 107let app = new SpinnerExample (); 108app.application.run (ARGV); 109</code> 110<p>I detta exempel använde vi följande:</p> 111<list> 112 <item><p><link href="http://www.roojs.org/seed/gir-1.2-gtk-3.0/gjs/Gdk.html">Gdk - Tangentvärden</link></p></item> 113 <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Application.html">Gtk.Application</link></p></item> 114 <item><p><link href="http://developer.gnome.org/gtk3/stable/GtkApplicationWindow.html">Gtk.ApplicationWindow</link></p></item> 115 <item><p><link href="http://www.roojs.org/seed/gir-1.2-gtk-3.0/gjs/Gtk.Spinner.html">Gtk.Spinner</link></p></item> 116</list> 117</page> 118