Initial commit

lib/assets/javascripts/builder/components/custom-carousel/custom-carousel-view.js

@@ -0,0 +1,137 @@
+var CoreView = require('backbone/core-view');
+var Ps = require('perfect-scrollbar');
+var template = require('./custom-carousel.tpl');
+var CarouselCollection = require('./custom-carousel-collection');
+var CarouselItemView = require('./custom-carousel-item-view');
+var _ = require('underscore');
+/*
+ *  A custom carousel selector
+ *
+ *  It accepts a collection of (val, label) model attributes or a values array
+ *  with the same content or only strings.
+ *
+ *  new CustomCarousel({
+ *    options: [
+ *      {
+ *        val: 'hello',
+ *        label: 'hi'
+ *      }
+ *    ]
+ *  });
+ */
+
+module.exports = CoreView.extend({
+
+  className: 'Carousel',
+  tagName: 'div',
+
+  initialize: function (opts) {
+    if (!opts.collection) {
+      if (!opts.options) { throw new Error('options array {value, label} is required'); }
+      this.collection = new CarouselCollection(opts.options);
+      this.options = opts;
+    }
+    this._bindedCheckShadows = this._checkShadows.bind(this);
+    this._initBinds();
+  },
+
+  render: function () {
+    this.clearSubViews();
+    this.$el.html(template());
+    this._renderList();
+    this._applyCustomScroll();
+    return this;
+  },
+
+  _initBinds: function () {
+    this.collection.bind('change:selected', this._checkScroll, this);
+  },
+
+  _renderList: function () {
+    this.collection.each(function (model) {
+      this._createItem(model);
+    }, this);
+  },
+
+  _createItem: function (model) {
+    var opts = this.options;
+    var className = opts && opts.listItemOptions ? opts.listItemOptions.className : 'Carousel-item';
+    var view = new CarouselItemView({
+      className: className,
+      model: model,
+      itemOptions: this.options.itemOptions
+    });
+
+    this._listContainer().append(view.render().el);
+    this.addView(view);
+  },
+
+  _applyCustomScroll: function () {
+    Ps.initialize(this._listContainer().get(0), {
+      wheelSpeed: 1,
+      wheelPropagation: false,
+      swipePropagation: true,
+      suppressScrollY: true,
+      stopPropagationOnClick: false,
+      minScrollbarLength: 120,
+      useBothWheelAxes: true
+    });
+    this._checkScroll();
+    this._bindScroll();
+  },
+
+  _destroyCustomScroll: function () {
+    this._unbindScroll();
+    Ps.destroy(this._listContainer().get(0));
+  },
+
+  _bindScroll: function () {
+    this._listContainer()
+      .on('ps-x-reach-start', this._bindedCheckShadows)
+      .on('ps-x-reach-end', this._bindedCheckShadows)
+      .on('ps-scroll-x', this._bindedCheckShadows);
+  },
+
+  _unbindScroll: function () {
+    this._listContainer()
+      .off('ps-x-reach-start', this._bindedCheckShadows)
+      .off('ps-x-reach-end', this._bindedCheckShadows)
+      .off('ps-scroll-x', this._bindedCheckShadows);
+  },
+
+  _checkScroll: function () {
+    var position = this.$('.is-selected').position();
+    if (position) {
+      this._listContainer().scrollLeft(position.left - 20);
+      this._bindedCheckShadows();
+    }
+  },
+
+  _listContainer: function () {
+    return this.$('.js-list');
+  },
+
+  _checkShadows: function () {
+    var currentPos = this._listContainer().scrollLeft();
+    var max = this._listContainer().get(0).scrollWidth;
+    var width = this._listContainer().outerWidth();
+    var maxPos = max - width;
+
+    this.$('.js-leftShadow').toggleClass('is-visible', currentPos > 0);
+    this.$('.js-rightShadow').toggleClass('is-visible', currentPos < maxPos);
+  },
+
+  clean: function () {
+    this._destroyCustomScroll();
+    CoreView.prototype.clean.apply(this);
+  },
+
+  initScroll: function () {
+    setTimeout(_.bind(function () {
+      this._checkShadows();
+      this._checkScroll();
+      Ps.update(this._listContainer().get(0));
+    }, this), 0);
+  }
+
+});