source: trunk/prototype/app/plugins/treeview/jquery.treeview.async.js @ 5136

/*
 * Async Treeview 0.1 - Lazy-loading extension for Treeview
 * 
 * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
 *
 * Copyright (c) 2007 Jörn Zaefferer
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 * Revision: $Id$
 *
 */

;(function($) {

function load(settings, root, child, container) {
        function createNode(parent) {
                var current = $("<li/>").attr("id", this.id || "").html("<span>" + this.text + "</span>").appendTo(parent);
                if (this.classes) {
                        current.children("span").addClass(this.classes);
                }
                if (this.expanded) {
                        current.addClass("open");
                }
                if (this.hasChildren || this.children && this.children.length) {
                        var branch = $("<ul/>").appendTo(current);
                        if (this.hasChildren) {
                                current.addClass("hasChildren");
                                createNode.call({
                                        classes: "placeholder",
                                        text: "&nbsp;",
                                        children:[]
                                }, branch);
                        }
                        if (this.children && this.children.length) {
                                $.each(this.children, createNode, [branch])
                        }
                }
        }
        $.ajax($.extend(true, {
                url: settings.url,
                dataType: "json",
                data: {
                        root: root
                },
                success: function(response) {
                        child.empty();
                        $.each(response, createNode, [child]);
                $(container).treeview({add: child});
            }
        }, settings.ajax));
        /*
        $.getJSON(settings.url, {root: root}, function(response) {
                function createNode(parent) {
                        var current = $("<li/>").attr("id", this.id || "").html("<span>" + this.text + "</span>").appendTo(parent);
                        if (this.classes) {
                                current.children("span").addClass(this.classes);
                        }
                        if (this.expanded) {
                                current.addClass("open");
                        }
                        if (this.hasChildren || this.children && this.children.length) {
                                var branch = $("<ul/>").appendTo(current);
                                if (this.hasChildren) {
                                        current.addClass("hasChildren");
                                        createNode.call({
                                                classes: "placeholder",
                                                text: "&nbsp;",
                                                children:[]
                                        }, branch);
                                }
                                if (this.children && this.children.length) {
                                        $.each(this.children, createNode, [branch])
                                }
                        }
                }
                child.empty();
                $.each(response, createNode, [child]);
        $(container).treeview({add: child});
    });
    */
}

var proxied = $.fn.treeview;
$.fn.treeview = function(settings) {
        if (!settings.url) {
                return proxied.apply(this, arguments);
        }
        var container = this;
        if (!container.children().size())
                load(settings, "source", this, container);
        var userToggle = settings.toggle;
        return proxied.call(this, $.extend({}, settings, {
                collapsed: true,
                toggle: function() {
                        var $this = $(this);
                        if ($this.hasClass("hasChildren")) {
                                var childList = $this.removeClass("hasChildren").find("ul");
                                load(settings, this.id, childList, container);
                        }
                        if (userToggle) {
                                userToggle.apply(this, arguments);
                        }
                }
        }));
};

})(jQuery);