/*

 * VigiGraph, composant de Vigilo.

 * Copyright (C) 2009-2015 CS-SI

 * Licence : GNU GPL v2 ou superieure

 *

 */

/*

 * Icone de chargement

 */

var Loader = new Class({

    clients: 0, // Nombre de demandes d'affichage

    initialize: function() {

        this.element = null;

        window.addEvent('domready', function () {

            this.element = $("loading");

        }.bind(this));

        this.logger = (new Log()).enableLog();

    },

    show: function() {

        this.clients += 1;

        if (!$chk(this.element) || this.element.getStyle("display") == "block") {

            return this;

        }

        this.logger.log("Showing spinner");

        this.element.setStyle("display", "block");

        return this;

    },

    hide: function() {

        this.clients -= 1;

        // Encore des demandes d'affichage en attente

        if (!$chk(this.element) || this.clients > 0) return this;

        if (this.element.getStyle("display") == "none") return this;

        this.logger.log("Hiding spinner");

        this.element.setStyle("display", "none");

        return this;

    }

});

loader = new Loader();

// Affichage du loader pour chaque requete

window.Request = Class.refactor(Request, {

    initialize: function(options){

        this.previous(options);

        this.addEvent("onRequest", loader.show.bind(loader));

        ['onComplete', 'onException', 'onCancel'].each(function(event){

            this.addEvent(event, loader.hide.bind(loader));

        }, this);

    }

});