WebCompDev / COMPONENTS

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@license
    The MIT License (MIT)

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

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    of this software and associated documentation files (the "Software"), to deal
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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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<link rel="import" href="../base-ajax-json-jsonpath-datalet/base-ajax-json-jsonpath-datalet.html">

<!--

`treemap-datalet` is a treemap datalet based on d3js treemap project http://bl.ocks.org/mbostock/4063582
A treemap recursively subdivides area into rectangles; the area of any node in the tree corresponds to its value.

Example:

    <treemap-datalet
        data-url="http://ckan.routetopa.eu/api/action/datastore_search?resource_id=#"
        fields='["field1","field2"]'>
    </treemap-datalet>

@element barchart-datalet
@status v0.1
@demo demo/index.html
@group datalets
-->

<dom-module id="treemap-datalet">
    <template>
        <style is="custom-style">

            :host ::content h6 {
                color: red;
            }

            :host ::content #treemap_placeholder {
                width: 100%;
                height: 70%;
                min-height: 500px;
                background: #ddd;
            }

            :host ::content text {
                pointer-events: none;
            }

            :host ::content .grandparent text {
                font-weight: bold;
            }

            :host ::content rect {
                fill: none;
                stroke: #fff;
            }

            :host ::content rect.parent,
            .grandparent rect {
                stroke-width: 2px;
            }

            :host ::content .grandparent rect {
                fill: orange;
            }

            :host ::content .grandparent:hover rect {
                fill: #ee9700;
            }

            :host ::content .children rect.parent,
            .grandparent rect {
                cursor: pointer;
            }

            :host ::content .children rect.parent {
                fill: #bbb;
                fill-opacity: .5;
            }

            :host ::content .children:hover rect.child {
                fill: #bbb;
            }
        </style>
        <div id="treemap_placeholder"></div>
        <base-ajax-json-jsonpath-datalet data-url="{{dataUrl}}" fields="{{fields}}"></base-ajax-json-jsonpath-datalet>
    </template>

    <script src="../shared_js/d3.js"></script>
    <script src="js/buildtreemap.js"></script>
    <script>

        var TreemapBehavior = {

            map : {
                name : this._component.name,
                children : []
            },

            transformData: function(e)
            {
                var treemapData = [];


                if(this.data.length > 1) {
                    for (i = 0; i < this.data.length; i++) {
                        var propName = this.data[i].name;

                        for (var j = 0; j < this.data[i].data.length; j++) {
                            if (i == 0) treemapData[j] = {};
                            currObj = {};
                            currObj[propName] = this.data[i].data[j];
                            jQuery.extend(treemapData[j], currObj);
                        }
                    }
                }else{
                    treemapData = this.data[0].data;
                }

                this.map.children = [];

                for(var i = 0; i < treemapData.length; i++){
                    this.checkAggragationField(treemapData[i], this._component.fields.length , this._component.fields.length - 1);
                }

                var json = JSON.stringify(this.map);

            },

            findChild: function(child, category){
                var children = child.children;
                for (var i=0; i<children.length; i++) {
                    if (children[i].name == category)
                        return children[i];
                }
                var nchild = {name : category , children : []};
                children.push(nchild);
                return nchild;
            },

            checkAggragationField: function(object, levels, value_index){
                var curchild = this.map;
                var keys = Object.keys(object);
                for(var level= 0; level < levels; level++){

                    var child = this.findChild(curchild, object[keys[level]]);
                    curchild = child;
                }

                if (curchild.value === undefined)
                    curchild.value = 0;

                var value = curchild.value + parseFloat(object[keys[value_index]]);
                curchild.children = null;
                curchild.value = value;
            },

            presentData: function(){
                build(this.map, "treemap_placeholder");
            }
        };


        Polymer({
            is : 'treemap-datalet' ,

            properties: {
                /**
                 * It's the name for treemap
                 *
                 * @attribute name
                 * @type String
                 * @default ''
                 */
                name: {
                    type: String,
                    value: ""
                }
            },

            ready: function(){
                var TreemapComponentBehavior =  $.extend(true, {}, BaseDataletBehavior, WorkcycleBehavior, AjaxJsonJsonPathBehavior, TreemapBehavior);
                TreemapComponentBehavior.init(this);
            }

        });
    </script>
</dom-module>