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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Keyboard Navigation in MenuButton - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
<link rel="stylesheet" type="text/css" href="../demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
</head>
<body>
<h2>Keyboard Navigation in MenuButton</h2>
<p>Press Alt+W to focus the menubutton. Once the menubutton get focus, you will be able to navigate menubutton using keyboard keys.</p>
<div style="margin:20px 0;"></div>
<div class="easyui-panel" style="padding:5px;">
<a id="btn-home" href="#" class="easyui-linkbutton" data-options="plain:true">Home</a>
<a href="#" class="easyui-menubutton" data-options="menu:'#mm1',iconCls:'icon-edit'">Edit</a>
<a href="#" class="easyui-menubutton" data-options="menu:'#mm2',iconCls:'icon-help'">Help</a>
<a href="#" class="easyui-menubutton" data-options="menu:'#mm3'">About</a>
</div>
<div id="mm1" style="width:150px;">
<div data-options="iconCls:'icon-undo'">Undo</div>
<div data-options="iconCls:'icon-redo'">Redo</div>
<div class="menu-sep"></div>
<div>Cut</div>
<div>Copy</div>
<div>Paste</div>
<div class="menu-sep"></div>
<div>
<span>Toolbar</span>
<div>
<div>Address</div>
<div>Link</div>
<div>Navigation Toolbar</div>
<div>Bookmark Toolbar</div>
<div class="menu-sep"></div>
<div>New Toolbar...</div>
</div>
</div>
<div data-options="iconCls:'icon-remove'">Delete</div>
<div>Select All</div>
</div>
<div id="mm2" style="width:100px;">
<div>Help</div>
<div>Update</div>
<div>About</div>
</div>
<div id="mm3" class="menu-content" style="background:#f0f0f0;padding:10px;text-align:left">
<img src="http://www.jeasyui.com/images/logo1.png" style="width:150px;height:50px">
<p style="font-size:14px;color:#444;">Try jQuery EasyUI to build your modern, interactive, javascript applications.</p>
</div>
<script type="text/javascript">
(function($){
function getParentMenu(rootMenu, menu){
return findParent(rootMenu);
function findParent(pmenu){
var p = undefined;
$(pmenu).find('.menu-item').each(function(){
if (!p && this.submenu){
if ($(this.submenu)[0] == $(menu)[0]){
p = pmenu;
} else {
p = findParent(this.submenu);
}
}
});
return p;
}
}
$.extend($.fn.menubutton.methods, {
enableNav: function(enabled){
var curr;
$(document).unbind('.menubutton');
if (enabled == undefined){enabled = true;}
if (enabled){
$(document).bind('keydown.menubutton', function(e){
var currButton = $(this).find('.m-btn-active,.m-btn-plain-active,.l-btn:focus');
if (!currButton.length){
return;
}
if (!curr || curr.button != currButton[0]){
curr = {
menu: currButton.data('menubutton') ? $(currButton.menubutton('options').menu) : $(),
button: currButton[0]
};
}
var item = curr.menu.find('.menu-active');
switch(e.keyCode){
case 13: // enter
item.trigger('click');
break;
case 27: // esc
currButton.trigger('mouseleave');
break;
case 38: // up
var prev = !item.length ? curr.menu.find('.menu-item:last') : item.prevAll('.menu-item:first');
prev.trigger('mouseenter');
return false;
case 40: // down
var next = !item.length ? curr.menu.find('.menu-item:first') : item.nextAll('.menu-item:first');
next.trigger('mouseenter');
return false;
case 37: // left
var pmenu = getParentMenu(currButton.data('menubutton') ? $(currButton.menubutton('options').menu) : $(), curr.menu);
if (pmenu){
curr.menu = pmenu;
item.triggerHandler('mouseleave');
} else {
var prev = currButton.prevAll('.l-btn:first');
if (prev.length){
currButton.trigger('mouseleave');
prev.focus();
}
}
return false;
case 39: // right
if (item.length && item[0].submenu){
curr.menu = $(item[0].submenu);
curr.button = currButton[0];
curr.menu.find('.menu-item:first').trigger('mouseenter');
} else {
var next = currButton.nextAll('.l-btn:first');
if (next.length){
currButton.trigger('mouseleave');
next.focus();
}
}
return false;
}
});
}
}
});
})(jQuery);
$(function(){
$.fn.menubutton.methods.enableNav();
$(document).keydown(function(e){
if (e.altKey && e.keyCode == 87){
$('#btn-home').focus();
}
})
});
</script>
</body>
</html>