
<!DOCTYPE html>
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<meta charset="utf-8">
<style>

text {
    font: 10px sans-serif;
    text-anchor: middle;
}

.node--hover circle {
    stroke: #000;
    stroke-width: 1.2px;
}

#main {
    width: 1000px;
    height: 500px;
}
</style>


<div id="main" style="width:1200px; height:960px;"></div>

<svg width="960" height="960"><g transform="translate(1,1)"></g></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="../dist/echarts.js"></script>
<script src="./lib/testHelper.js"></script>
<script src="./lib/config.js"></script>
<script>

var stratify = d3.stratify()
    .parentId(function(d) {
        return d.id.substring(0, d.id.lastIndexOf("."));
    });

d3.csv("data/flare.csv", function(error, rawData) {
    if (error) throw error;

    var root = stratify(rawData)
        .sum(function(d) {
            return d.value;
        })
        .sort(function(a, b) {
            return b.value - a.value;
        });
    var maxDepth = 0;
    var seriesData = root.descendants().map(function (node) {
        maxDepth = Math.max(maxDepth, node.depth);
        return [
            node.value,
            node.depth,
            node.id
        ];
    });

    var chart = echarts.init(document.getElementById('main'));

    function renderItem(params, api) {
        var context = params.context;
        if (!context.layout) {
            d3.pack()
                .size([api.getWidth() - 2, api.getHeight() - 2])
                .padding(3)(root);

            context.nodes = {};
            root.descendants().forEach(function (node, index) {
                context.nodes[node.id] = {
                    index: index,
                    node: node
                }
            });
        }

        var nodePath = api.value(2);
        var node = context.nodes[nodePath].node;
        var isLeaf = !node.children || !node.children.length;

        var textFont = api.font({
            fontSize: 12,
            fontFamily: 'Arial'
        });

        var focus = new Uint32Array(node.descendants().map(function (node) {
            return context.nodes[node.id].index;
        }));

        var nodeName = isLeaf ? nodePath.slice(nodePath.lastIndexOf('.') + 1).split(/(?=[A-Z][^A-Z])/g).join('\n') : '';

        var z2 = api.value(1) * 2;

        return {
            type: 'circle',
            focus: focus,
            shape: {
                cx: node.x,
                cy: node.y,
                r: node.r
            },
            z2: z2,
            textContent: {
                type: 'text',
                style: {
                    text: nodeName,
                    width: node.r * 1.3,
                    overflow: 'truncate',
                    fontSize: node.r / 3
                    // fill: 'blue'
                },
                emphasis: {
                    style: {
                        overflow: null,
                        fontSize: Math.max(node.r / 3, 12)
                        // fill: 'red'
                    }
                }
            },
            textConfig: {
                position: 'inside'
            },
            style: {
                fill: api.visual('color'),
                text: nodeName,
                font: textFont,
            },
            emphasis: {
                style: {
                    font: textFont,
                    shadowBlur: 20,
                    shadowOffsetX: 3,
                    shadowOffsetY: 5,
                    shadowColor: 'rgba(0,0,0,0.3)'
                }
            }
        };
    }

    var option = {
        xAxis: {
            axisLine: {show: false},
            axisTick: {show: false},
            axisLabel: {show: false},
            splitLine: {show: false}
        },
        yAxis: {
            axisLine: {show: false},
            axisTick: {show: false},
            axisLabel: {show: false},
            splitLine: {show: false}
        },
        tooltip: {},
        visualMap: {
            show: false,
            min: 0,
            max: maxDepth,
            dimension: 1,
            inRange: {
                color: ['#006edd', '#e0ffff']
            }
        },
        series: {
            type: 'custom',
            renderItem: renderItem,
            encode: {
                tooltip: 0,
                itemName: 2
            },
            data: seriesData
        }
    };

    chart.setOption(option);

    // testHelper.printElements(chart, {
    //     attr: ['z', 'z2', 'style.text', 'style.fill', 'style.stroke'],
    //     filter: function (el) {
    //         return el.style && el.style.text;
    //     }
    // });

});

</script>