WebCompDev / COMPONENTS

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@license
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    Copyright (c) 2015 Dipartimento di Informatica - Università di Salerno - Italy

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<!--
* Developed by :
* ROUTE-TO-PA Project - grant No 645860. - www.routetopa.eu
*
-->

<link rel="import" href="../../bower_components/polymer/polymer.html">
<link rel="import" href="../../bower_components/paper-styles/color.html">

<link rel="import" href="../../bower_components/paper-material">
<link rel="import" href="../../bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="../../bower_components/iron-icons/iron-icons.html">
<link rel="import" href="../../bower_components/iron-flex-layout/iron-flex-layout.html">

<!--
 `items-slider-controllet` is a carousel of cards with a title and an image. Pass to it an array of objects with name and image fields and
 a responsive slider will be created. Every time the user click on a card an event will be generate in order to get the card clicked information to
 the component that use the slider.

Example:

    <items-slider-controllet items='[{name : "myObject1", image : "pathToMyImage1"},...,{name : "myObjectN", image : "pathToMyImageN"}]' \>
    </items-slider-controllet>


@element items-slider-controllet
@status beta
@homepage index.html
@group controllets
-->

<dom-module id="items-list-controllet">
    <template>

        <style is="custom-style">

            .content-card{
                position: relative;
                float: left;
                margin : .5em;
                width: 80px;
                height: 72px;
                background: #fff;
                padding: 1em;

            }

            #container{
                position: relative;
                overflow: auto;
            }

            img{
                height: 100%;
                width: 100%;
            }

            .legend {
                position: absolute;
                /*background: rgba(0,0,0,0.8);*/
                background: #9e9e9e;
                color: #ffffff;
                height: 30px;
                padding: 0 16px;
                left: 0;
                bottom: 7px;
                z-index: 1;
                opacity: 0.87;
                width: 80px;
                font-size: 11px;
            }

            .legend span{
                position: relative;
                top: 8px;
            }

            .grid{
                margin: auto;
                padding: 5%;
            }

        </style>

        <div id="container" class="layout vertical">
            <div class="grid">
                <template is="dom-repeat" items="{{items}}" as="item">
                        <template is="dom-if" if="{{_checkCard(item.name)}}">
                            <paper-material elevation="5" class='content-card' id="{{_replaceString(item.name)}}" on-click="_cardClick">
                                <div class="legend"><span>{{_replaceString(item.name)}}</span></div>
                                <div class="card-content-image">
                                    <img src="{{item.image}}">
                                </div>
                            </paper-material>
                        </template>
                        <template is="dom-if" if="{{!_checkCard(item.name)}}">
                            <paper-material elevation="1" class='content-card' id="{{_replaceString(item.name)}}" on-click="_cardClick">
                                <div class="legend"><span>{{_replaceString(item.name)}}</span></div>
                                <div class="card-content-image">
                                    <img src="{{item.image}}">
                                </div>
                            </paper-material>
                        </template>
                </template>
            </div>
        </div>
    </template>

    <script type="text/javascript" src="../shared_js/perfect-scrollbar/js/perfect-scrollbar.jquery.js"></script>

    <script>

        Polymer({

            is : 'items-list-controllet',

            /**
             * Fired when the user selects a card from slider by clicking on it.
             *
             * @event items-slider-controllet_item-selected
             */
            properties : {
                /**
                 * It stores all items to put in the slider
                 *
                 */
                items : {
                    type: Array,
                    value: []
                },
                prevSelectedCard : {
                    type: Object,
                    value : null
                },
                /**
                 * Presected card. You can pass the card title to preselect it.
                 */
                selectedCard:{
                    type: String,
                    value: undefined
                },
                height:{
                    type: String,
                    value: "30vh"
                },
                width:{
                    type: String,
                    value: "30vh"
                },
                replaceString:{
                    type: String,
                    vale: undefined
                }
            },

            ready : function(){
                this.$.container.style.height = this.height;
                this.$.container.style.width  = this.width;

                $(this.$.container).perfectScrollbar();

                if(this.selectedCard != undefined){
                    this.fire('items-list-controllet_item-selected', {datalet: this.selectedCard + this.replaceString});
                }

            },

            _checkCard: function(name){
               return (this._replaceString(name) == this.selectedCard);
            },

            _cardClick : function(e){
                if(this.selectedCard != undefined) {
                    var card = document.getElementById(this.selectedCard);
                    this.prevSelectedCard = card;
                    this.selectedCard = undefined;
                }

                if(this.prevSelectedCard != null){
                    this.prevSelectedCard.elevation = "1";

                }
                e.currentTarget.elevation = "5";
                this.prevSelectedCard = e.currentTarget;

                this.fire('items-list-controllet_item-selected', {datalet: e.currentTarget.id + this.replaceString,
                                                                  selectedElement: e.currentTarget.cloneNode(true)});

            },

            _replaceString: function(string){
               return (this.replaceString != undefined) ? string.replace(this.replaceString,"") : string;
            }
        });

    </script>

</dom-module>