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Menu: new prototype for drilldown menu with keyboard handling
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‎tests/visual/menu/drilldown2.html

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<!doctype html>
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<html>
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<head>
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<title>Menu Visual Test: Default</title>
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<link rel="stylesheet" href="../visual.css" type="text/css" />
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<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css" title="ui-theme" />
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<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
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<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
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<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
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<script type="text/javascript" src="../../../ui/jquery.ui.position.js"></script>
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<script type="text/javascript" src="../../../ui/jquery.ui.button.js"></script>
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<script type="text/javascript" src="../../../ui/jquery.ui.autocomplete.js"></script>
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<script type="text/javascript">
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$(function() {
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$.widget("ui.drilldown", {
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_init: function() {
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var self = this;
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this.active = this.element.find(">ul").attr("tabindex", 0);
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// hide submenus and create indicator icons
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this.element.find("ul").hide().prev("a").prepend('<span class="ui-icon ui-icon-carat-1-e"></span>').end().filter(":first").show();
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this.element.find("ul").menu({
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focus: function(event, ui) {
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self.activeItem = ui.item;
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},
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selected: function(event, ui) {
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if (this != self.active[0]) {
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return;
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}
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var nested = $(">ul", ui.item);
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if (nested.length) {
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self._open(nested);
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} else {
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self.element.find("h3").text(ui.item.text());
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self.options.selected.apply(this, arguments);
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}
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}
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});
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this.back = this.element.children(":last").button({
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icons: {
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primary: "ui-icon-carat-1-w"
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}
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}).click(function() {
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self.up();
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return false;
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}).hide();
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},
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_open: function(submenu) {
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this.active = submenu.show().css({
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top: 0,
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left: 0
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}).position({
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my: "left top",
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at: "left top",
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of: this.widget()
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});
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this.back.show();
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},
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up: function() {
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if (this.active.parent()[0] == this.element[0]) {
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return;
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}
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this.active.hide();
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this.active = this.active.parent().parent().show();
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if (!this.active.parent().parent().is(":ui-menu")) {
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this.back.hide();
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}
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},
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down: function(event) {
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var nested = this.activeItem.find(">ul");
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if (nested.length) {
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this._open(nested);
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nested.menu("activate", event, nested.children(":first"))
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}
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},
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show: function() {
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},
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hide: function() {
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},
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widget: function() {
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return this.element.find(">ul");
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}
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});
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var drilldown = $("#drilldown").drilldown({
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selected: function(event, ui) {
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$("#log").append("<div>Selected " + ui.item.text() + "</div>");
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}
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});
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drilldown.drilldown("widget").keydown(function(event) {
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var menu = drilldown.data("drilldown").active.data("menu");
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if (menu.widget().is(":hidden"))
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return;
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event.stopPropagation();
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switch (event.keyCode) {
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case $.ui.keyCode.PAGE_UP:
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menu.previousPage();
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break;
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case $.ui.keyCode.PAGE_DOWN:
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menu.nextPage();
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break;
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case $.ui.keyCode.UP:
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menu.previous();
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break;
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case $.ui.keyCode.LEFT:
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drilldown.drilldown("up");
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break;
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case $.ui.keyCode.RIGHT:
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drilldown.drilldown("down");
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break;
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case $.ui.keyCode.DOWN:
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menu.next();
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event.preventDefault();
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break;
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case $.ui.keyCode.ENTER:
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case $.ui.keyCode.TAB:
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menu.select();
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drilldown.drilldown("hide");
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event.preventDefault();
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break;
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case $.ui.keyCode.ESCAPE:
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drilldown.drilldown("hide", event);
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break;
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default:
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clearTimeout(menu.filterTimer);
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var prev = menu.previousFilter || "";
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var character = String.fromCharCode(event.keyCode);
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var skip = false;
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if (character == prev) {
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skip = true;
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} else {
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character = prev + character;
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}
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var match = menu.widget().children("li").filter(function() {
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return new RegExp("^" + character, "i").test($("a", this).text());
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});
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var match = skip && match.index(menu.active.next()) != -1 ? match.next() : match;
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if (!match.length) {
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character = String.fromCharCode(event.keyCode);
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match = menu.widget().children("li").filter(function() {
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return new RegExp("^" + character, "i").test($(this).text());
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});
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}
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if (match.length) {
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menu.activate(match);
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if (match.length > 1) {
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menu.previousFilter = character;
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menu.filterTimer = setTimeout(function() {
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delete menu.previousFilter;
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}, 1000);
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} else {
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delete menu.previousFilter;
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}
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} else {
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delete menu.previousFilter;
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}
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}
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});
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});
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</script>
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<style>
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body { font-size:62.5%; }
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.ui-menu { width: 200px; height: 170px; }
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.ui-menu .ui-menu { position: absolute; }
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.ui-menu .ui-icon { float: right; }
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</style>
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</head>
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<body>
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<div id="drilldown">
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<h3>Make a selection...</h3>
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<ul>
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<li>
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<a href="#">Amsterdam</a>
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<ul>
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<li><a href="#">Aberdeen</a></li>
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<li><a href="#">Ada</a></li>
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<li>
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<a href="#">Adamsville</a>
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<ul>
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<li><a href="#">Anaheim</a></li>
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<li>
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<a href="#">Cologne</a>
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<ul>
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<li><a href="#">Mberdeen</a></li>
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<li><a href="#">Mda</a></li>
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<li><a href="#">Mdamsville</a></li>
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<li><a href="#">Mddyston</a></li>
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<li><a href="#">Mmesville</a></li>
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</ul>
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</li>
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<li><a href="#">Frankfurt</a></li>
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</ul>
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</li>
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<li><a href="#">Addyston</a></li>
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<li><a href="#">Amesville</a></li>
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</ul>
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</li>
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<li><a href="#">Anaheim</a></li>
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<li><a href="#">Cologne</a></li>
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<li><a href="#">Frankfurt</a></li>
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<li>
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<a href="#">Magdeburg</a>
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<ul>
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<li><a href="#">Mberdeen</a></li>
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<li><a href="#">Mda</a></li>
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<li><a href="#">Mdamsville</a></li>
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<li><a href="#">Mddyston</a></li>
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<li><a href="#">Mmesville</a></li>
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</ul>
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</li>
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<li><a href="#">Munich</a></li>
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<li><a href="#">Utrecht</a></li>
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<li><a href="#">Zurich</a></li>
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</ul>
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<a href="#">Go back</a>
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</div>
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<div class="ui-widget" style="margin-top:2em; font-family:Arial">
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Log:
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<div id="log" style="height: 400px; width: 300px; overflow: auto;" class="ui-widget-content"></div>
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</div>
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</body>
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</html>

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