datalets/highcharts-datalet/highcharts-datalet.html

<!--
@license
    The MIT License (MIT)

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

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
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    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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<!--
* Created by :
* Luigi Serra - luigser@gmail.com
* Andrea Petta - andrpet@gmail.com
*
* Copyright (c) 2015 Dipartimento di Informatica - Università di Salerno - Italy
*
-->

<link rel="import" href="../base-ajax-json-jsonpath-datalet/base-ajax-json-jsonpath-datalet.html">

<!--
The `highcharts-datalet` uses the base-ajax-json-jsonpath-datalet as data retriving and selection mechanism. It defines the common properties
for all the highchart datalets : categories, series and series_type. Overmore override the transformData method
to create and populate categories and series array. Every specific highchart chart implementation (eg linechart, barchart, columnchart ...)
will use highcharts-datalet properties to create the appropriate chart.

Example :

    <dom-module id="highcarts-chart-datalet">
        <template>
            ...
            <highcharts-datalet id="charts" data-url="{{dataUrl}}" fields="{{fields}}"></highcharts-datalet>
            ...
        </template>
    </dom-module>

@element highcharts-datalet
@status v0.1
@homepage
@group datalets
-->

<dom-module id="highcharts-datalet">

    <template>
        <div id="container" style="width:auto; height:auto;"></div>
        <base-ajax-json-jsonpath-datalet data-url="{{dataUrl}}" fields="{{fields}}"></base-ajax-json-jsonpath-datalet>
    </template>

    <script src="static/js/highcharts.js"></script>
    <script src="static/js/exporting.js"></script>

    <script>
        var HighchartsBehavior = {

            properties: {

                categories: {
                    type: Array,
                    value: []
                },

                series: {
                    type: Array,
                    value: []
                },

                series_type:{
                    type: String,
                    value: "line"//spline,time
                }
            },
            /**
             * Normalizes a number in agreement with javascript's conventions. Delete all NaN characters. Exception: number representing lat & long remain unchanged.
             */
            jNumConverter: function(num) {
                //lat-long
                if(num.charAt(num.length-7) == "." && (num.match(/[\.,]/g) || []).length == 1)
                    return num;

                var jNum = "";
                for (var i = 0; i < num.length; i++) {
                    if(num[i].match(/[\.,]/g))
                        if (i == num.length - 3)
                            jNum += ".";
                        else
                            ;
                    else if (!isNaN(num[i]))
                        jNum += num[i];
                }

                return jNum;
            },
            /**
             * Populate the categories and the series array.
             *
             * @method transformData
             *
             * @param {Event} e
             */
            transformData: function () {

                this.properties.categories.value = this.data[0].data;

                for (var i = 1; i < this.data.length; i++)
                {

                    this.data[i].data.every(function (element, index, array) {
                        try {
                            var e = HighchartsBehavior.jNumConverter(element);
                            (isNaN(element)) ? array[index] = parseFloat(HighchartsBehavior.jNumConverter(element)) :
                                    array[index] = parseFloat(element);
                        }catch(e){
                            //console.log("Parsing data error. Highchart-datalet.selectData");
                        }
                        return true;
                    });

                    this.properties.series.value.push(this.data[i]);
                }
            }
        };

        var HighchartsComponentBehavior = $.extend(true, {}, BaseDataletBehavior, WorkcycleBehavior, AjaxJsonJsonPathBehavior, HighchartsBehavior);

        HighchartsDatalet = Polymer({
            is : 'highcharts-datalet'
        });
    </script>

</dom-module>