Create Tree widget

build/js/Tree.js

@@ -0,0 +1,149 @@
+/* Tree()
+ * ======
+ * Converts a nested list into a multilevel
+ * tree view menu.
+ *
+ * @type Function
+ * @Usage: $('.my-menu').tree(options)
+ *         or add [data-widget="tree"] to the ul element
+ *         Pass any option as data-option="value"
+ */
++function ($) {
+  'use strict'
+
+  var DataKey = 'lte.tree'
+
+  var Default = {
+    animationSpeed: 500,
+    accordion     : true,
+    followLink    : false,
+    trigger       : '.treeview a'
+  }
+
+  var Selector = {
+    tree        : '.tree',
+    treeview    : '.treeview',
+    treeviewMenu: '.treeview-menu',
+    open        : '.menu-open, .active',
+    li          : 'li',
+    data        : '[data-widget="tree"]',
+    active      : '.active'
+  }
+
+  var ClassName = {
+    open: 'menu-open',
+    tree: 'tree'
+  }
+
+  var Event = {
+    collapsed: 'collapsed.tree',
+    expanded : 'expanded.tree'
+  }
+
+  // Tree Class Definition
+  // =====================
+  var Tree = function (element, options) {
+    this.element = element
+    this.options = options
+
+    $(this.element).addClass(ClassName.tree)
+
+    $(Selector.treeview + Selector.active, this.element).addClass(ClassName.open)
+
+    this._setUpListeners()
+  }
+
+  Tree.prototype.toggle = function (link, event) {
+    var treeviewMenu = link.next(Selector.treeviewMenu)
+    var parentLi     = link.parent()
+    var isOpen       = parentLi.hasClass(ClassName.open)
+
+    if (!parentLi.is(Selector.treeview)) {
+      return
+    }
+
+    if (!this.options.followLink || link.attr('href') == '#') {
+      event.preventDefault()
+    }
+
+    if (isOpen) {
+      this.collapse(treeviewMenu, parentLi)
+    } else {
+      this.expand(treeviewMenu, parentLi)
+    }
+  }
+
+  Tree.prototype.expand = function (tree, parent) {
+    var expandedEvent = $.Event(Event.expanded)
+
+    if (this.options.accordion) {
+      var openMenuLi = parent.siblings(Selector.open)
+      var openTree   = openMenuLi.children(Selector.treeviewMenu)
+      this.collapse(openTree, openMenuLi)
+    }
+
+    parent.addClass(ClassName.open)
+    tree.slideDown(this.options.animationSpeed, function () {
+      $(this.element).trigger(expandedEvent)
+    })
+  }
+
+  Tree.prototype.collapse = function (tree, parentLi) {
+    var collapsedEvent = $.Event(Event.collapsed)
+
+    tree.find(Selector.open).removeClass(ClassName.open)
+    parentLi.removeClass(ClassName.open)
+    tree.slideUp(this.options.animationSpeed, function () {
+      tree.find(Selector.open + ' > ' + Selector.treeview).slideUp()
+      $(this.element).trigger(collapsedEvent)
+    })
+  }
+
+  // Private
+
+  Tree.prototype._setUpListeners = function () {
+    var that = this
+
+    $(document)
+      .off('click', this.options.trigger)
+      .on('click', this.options.trigger, function (event) {
+        that.toggle($(this), event)
+      })
+  }
+
+  // Plugin Definition
+  // =================
+  function Plugin(option) {
+    return this.each(function () {
+      var $this = $(this)
+      var data  = $this.data(DataKey)
+
+      if (!data) {
+        var options = $.extend({}, Default, $this.data(), typeof option == 'object' && option)
+        $this.data(DataKey, new Tree($this, options))
+      }
+    })
+  }
+
+  var old = $.fn.tree
+
+  $.fn.tree             = Plugin
+  $.fn.tree.Constructor = Tree
+
+  // No Conflict Mode
+  // ================
+  $.fn.tree.noConflict = function () {
+    $.fn.tree = old
+    return this
+  }
+
+
+  // Tree Data API
+  // =============
+  $(window).on('load', function () {
+    $(Selector.data).each(function () {
+      Plugin.call($(this))
+    })
+  })
+
+}(jQuery)