// mtree.js
// Requires jquery.js and velocity.js (optional but recommended).
// Copy the below function, add to your JS, and simply add a list
;(function ($, window, document, undefined) {
// Only apply if mtree list exists
if($('ul.mtree').length) {
// Settings
var collapsed = true; // Start with collapsed menu (only level 1 items visible)
var close_same_level = true; // Close elements on same level when opening new node.
var duration = 400; // Animation duration should be tweaked according to easing.
var listAnim = true; // Animate separate list items on open/close element (velocity.js only).
var easing = 'easeInOutQuad'; // Velocity.js only, defaults to 'swing' with jquery animation.
// Set initial styles
$('.mtree ul').css({'overflow':'hidden', 'height': (collapsed) ? 0 : 'auto', 'display': (collapsed) ? 'none' : 'block' });
// Get node elements, and add classes for styling
var node = $('.mtree li:has(ul)');
node.each(function(index, val) {
$(this).children(':first-child').css('cursor', 'pointer')
$(this).addClass('mtree-node mtree-' + ((collapsed) ? 'closed' : 'open'));
$(this).children('ul').addClass('mtree-level-' + ($(this).parentsUntil($('ul.mtree'), 'ul').length + 1));
});
// Set mtree-active class on list items for last opened element
$('.mtree li > *:first-child').on('click.mtree-active', function(e){
if($(this).parent().hasClass('mtree-closed')) {
$('.mtree-active').not($(this).parent()).removeClass('mtree-active');
$(this).parent().addClass('mtree-active');
} else if($(this).parent().hasClass('mtree-open')){
$(this).parent().removeClass('mtree-active');
} else {
$('.mtree-active').not($(this).parent()).removeClass('mtree-active');
$(this).parent().toggleClass('mtree-active');
}
});
// Set node click elements, preferably but node links can be also
node.children(':first-child').on('click.mtree', function(e){
// element vars
var el = $(this).parent().children('ul').first();
var isOpen = $(this).parent().hasClass('mtree-open');
// close other elements on same level if opening
if((close_same_level || $('.csl').hasClass('active')) && !isOpen) {
var close_items = $(this).closest('ul').children('.mtree-open').not($(this).parent()).children('ul');
// Velocity.js
if($.Velocity) {
close_items.velocity({
height: 0
}, {
duration: duration,
easing: easing,
display: 'none',
delay: 100,
complete: function(){
setNodeClass($(this).parent(), true)
}
});
// jQuery fallback
} else {
close_items.delay(100).slideToggle(duration, function(){
setNodeClass($(this).parent(), true);
});
}
}
// force auto height of element so actual height can be extracted
el.css({'height': 'auto'});
// listAnim: animate child elements when opening
if(!isOpen && $.Velocity && listAnim) el.find(' > li, li.mtree-open > ul > li').css({'opacity':0}).velocity('stop').velocity('list');
// Velocity.js animate element
if($.Velocity) {
el.velocity('stop').velocity({
//translateZ: 0, // optional hardware-acceleration is automatic on mobile
height: isOpen ? [0, el.outerHeight()] : [el.outerHeight(), 0]
},{
queue: false,
duration: duration,
easing: easing,
display: isOpen ? 'none' : 'block',
begin: setNodeClass($(this).parent(), isOpen),
complete: function(){
if(!isOpen) $(this).css('height', 'auto');
}
});
// jQuery fallback animate element
} else {
setNodeClass($(this).parent(), isOpen);
el.slideToggle(duration);
}
// We can't have nodes as links unfortunately
e.preventDefault();
});
// Function for updating node class
function setNodeClass(el, isOpen) {
if(isOpen) {
el.removeClass('mtree-open').addClass('mtree-closed');
} else {
el.removeClass('mtree-closed').addClass('mtree-open');
}
}
// List animation sequence
if($.Velocity && listAnim) {
$.Velocity.Redirects.list = function (element, options, index, size) {
$.Velocity.animate(element, {
opacity: [1,0],
translateY: [0, -(index+12)]
}, {
delay: index*(duration/size/2),
duration: duration,
easing: easing
});
};
}
// Fade in mtree after classes are added.
// Useful if you have set collapsed = true or applied styles that change the structure so the menu doesn't jump between states after the function executes.
if($('.mtree').css('opacity') == 0) {
if($.Velocity) {
$('.mtree').css('opacity', 1).children().css('opacity', 0).velocity('list');
} else {
$('.mtree').show(200);
}
}
$('body').addClass('menu-loaded');
}
}(jQuery, this, this.document));