Initial commit

lib/assets/javascripts/dashboard/helpers/scroll-tofixed-view.js

@@ -0,0 +1,43 @@
+var $ = require('jquery');
+var CoreView = require('backbone/core-view');
+var checkAndBuildOpts = require('builder/helpers/required-opts');
+
+var REQUIRED_OPTS = [
+  'el'
+];
+
+module.exports = CoreView.extend({
+
+  events: {
+    'click .js-foo': '_fooHandler'
+  },
+
+  initialize: function (opts) {
+    checkAndBuildOpts(opts, REQUIRED_OPTS, this);
+    this._onWindowScroll = this._onWindowScroll.bind(this);
+
+    this._topBoundary = this.$el.offset().top;
+    this._initBinds();
+  },
+
+  _initBinds: function () {
+    this._bindScroll();
+  },
+
+  _onWindowScroll: function () {
+    this.$el.toggleClass('is-fixed', $(window).scrollTop() > this._topBoundary);
+  },
+
+  _unbindScroll: function () {
+    $(window).unbind('scroll', this._onWindowScroll);
+  },
+
+  _bindScroll: function () {
+    this._unbindScroll();
+    $(window).bind('scroll', this._onWindowScroll);
+  },
+
+  clean: function () {
+    this._unbindScroll();
+  }
+});