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   http://www.apache.org/licenses/LICENSE-2.0

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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="https://d3js.org/d3.v4.min.js"></script>
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/facePrint.js"></script>
        <script src="lib/testHelper.js"></script>
        <!-- <script src="ut/lib/canteen.js"></script> -->
        <link rel="stylesheet" href="lib/reset.css" />
    </head>
    <body>
        <style>
        </style>


        <div id="main0"></div>
        <div id="main1"></div>

        <script>
            window.ANIMATION_DURATION_UPDATE = 1000;
        </script>


        <script>
        require([
            'echarts',
            // 'map/js/china',
            // './data/nutrients.json'
        ], function (echarts) {
            var option;

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

            function toPlainTree(root) {
                return {
                    children: root.children && root.children.map(child => toPlainTree(child)),
                    value: root.value,
                    name: root.id.split('.').pop(),
                    id: root.id
                }
            }

            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 seriesDataLinear = root.descendants().map(function (node) {
                    maxDepth = Math.max(maxDepth, node.depth);
                    return [
                        node.value,
                        node.depth,
                        node.id
                    ];
                });

                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
                            },
                            emphasis: {
                                style: {
                                    overflow: null,
                                    fontSize: Math.max(node.r / 3, 12)
                                }
                            }
                        },
                        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 circlePackingOption = {
                    tooltip: {},
                    visualMap: {
                        show: false,
                        min: 0,
                        max: maxDepth,
                        dimension: 1,
                        inRange: {
                            color: ['#006edd', '#e0ffff']
                        }
                    },
                    series: {
                        type: 'custom',
                        id: 'main',
                        renderItem: renderItem,
                        coordinateSystem: null,
                        animationDurationUpdate: ANIMATION_DURATION_UPDATE,
                        encode: {
                            tooltip: 0,
                            itemName: 2
                        },
                        universalTransition: {
                            enabled: true
                        },
                        data: seriesDataLinear
                    }
                };

                var treemapOption = {
                    series: {
                        type: 'treemap',
                        id: 'main',
                        data: toPlainTree(root).children,
                        animationDurationUpdate: ANIMATION_DURATION_UPDATE,
                        roam: false,
                        label: {
                            fontSize: 10
                        },
                        breadcrumb: {
                            show: false
                        },
                        universalTransition: {
                            enabled: true
                        },
                        itemStyle: {
                            color: '#ddd',
                            borderWidth: 2
                        }
                    }
                }

                var sunburstOption = {
                    series: {
                        type: 'sunburst',
                        id: 'main',
                        data: toPlainTree(root).children,
                        animationDurationUpdate: ANIMATION_DURATION_UPDATE,
                        roam: false,
                        radius: ['20%', '90%'],
                        label: {
                            show: false
                        },
                        breadcrumb: {
                            show: false
                        },
                        universalTransition: {
                            enabled: true
                        },
                        itemStyle: {
                            borderWidth: 1
                        }
                    }
                }

                var chart = testHelper.create(echarts, 'main0', {
                    title: [
                        'Custom Series: Universal Transition betwee treemap and circle packing '
                    ],
                    recordVideo: true,
                    option: treemapOption,
                    height: 500,
                    buttons: [{
                        text: 'Custom Circle Packing',
                        onclick: function () {
                            chart.setOption(circlePackingOption, true);
                        }
                    }, {
                        text: 'Treemap',
                        onclick: function () {
                            chart.setOption(treemapOption, true);
                        }
                    }, {
                        text: 'Sunburst',
                        onclick: function () {
                            chart.setOption(sunburstOption, true);
                        }
                    }],
                });
            });
        });
        </script>


        <script>
            require([
                'echarts'
            ], function (echarts) {
                var pieData = [
                    { value: 800, name: 'A' },
                    { value: 635, name: 'B' },
                    { value: 580, name: 'C' },
                    { value: 484, name: 'D' },
                    { value: 300, name: 'E' },
                    { value: 200, name: 'F' }
                ];
                const defaultPalette = [
                    // '#51689b', '#ce5c5c', '#fbc357', '#8fbf8f', '#659d84', '#fb8e6a', '#c77288', '#786090', '#91c4c5', '#6890ba'
                    '#5470c6',
                    '#91cc75',
                    '#fac858',
                    '#ee6666',
                    '#73c0de',
                    '#3ba272',
                    '#fc8452',
                    '#9a60b4',
                    '#ea7ccc'
                ];

                const radius = ['30%', '80%'];

                var pieOption = {
                    series: [{
                        type: 'pie',
                        center: ['50%', '50%'],
                        radius: radius,
                        label: {
                            show: false
                        },
                        itemStyle: {
                            borderRadius: 0
                        },
                        universalTransition: {
                            enabled: true,
                            seriesKey: 'first'
                        },
                        animationDurationUpdate: 1000,
                        data: pieData
                    }]
                };


                var parliamentOption = (function () {
                    const sum = pieData.reduce((sum, cur) => {
                        return sum + cur.value;
                    }, 0);

                    const angles = [];
                    const startAngle = -Math.PI / 2;
                    let curAngle = startAngle;
                    pieData.forEach(item => {
                        angles.push(curAngle);
                        curAngle += (item.value / sum) * Math.PI * 2;
                    });
                    angles.push(startAngle + Math.PI * 2);
                    function parliamentLayout(startAngle, endAngle, totalAngle, r0, r1, size) {
                        const rowsCount = Math.ceil((r1 - r0) / size);
                        const points = [];

                        let r = r0;
                        for (let i = 0; i < rowsCount; i++) {
                            // Recalculate size
                            const totalRingSeatsNumber = Math.round((totalAngle * r) / size);
                            const newSize = (totalAngle * r) / totalRingSeatsNumber;
                            for (
                                let k = Math.floor((startAngle * r) / newSize) * newSize;
                                k < Math.floor((endAngle * r) / newSize) * newSize - 1e-6;
                                k += newSize
                            ) {
                                const angle = k / r;
                                const x = Math.cos(angle) * r;
                                const y = Math.sin(angle) * r;
                                points.push([x, y]);
                            }

                            r += size;
                        }

                        return points;
                    }
                    return {
                        series: {
                            type: 'custom',
                            data: pieData,
                            coordinateSystem: undefined,
                            universalTransition: {
                                enabled: true,
                                seriesKey: 'first'
                            },
                            animationDurationUpdate: 1000,
                            renderItem(params, api) {
                                const idx = params.dataIndex;
                                const viewSize = Math.min(api.getWidth(), api.getHeight());
                                const r0 = ((parseFloat(radius[0]) / 100) * viewSize) / 2;
                                const r1 = ((parseFloat(radius[1]) / 100) * viewSize) / 2;
                                const cx = api.getWidth() * 0.5;
                                const cy = api.getHeight() * 0.5;
                                const size = 15;

                                const points = parliamentLayout(
                                    angles[idx],
                                    angles[idx + 1],
                                    Math.PI * 2,
                                    r0,
                                    r1,
                                    size + 3
                                );

                                return {
                                    type: 'group',
                                    children: points.map(pt => {
                                        return {
                                            type: 'circle',
                                            autoBatch: true,
                                            shape: {
                                                cx: cx + pt[0],
                                                cy: cy + pt[1],
                                                r: size / 2
                                            },
                                            style: {
                                                fill: defaultPalette[idx % defaultPalette.length]
                                            }
                                        };
                                    })
                                };
                            }
                        }
                    };
                })();

                var chart = testHelper.create(echarts, 'main1', {
                    title: [
                        'Parliament and pie chart.'
                    ],
                    recordVideo: true,
                    option: pieOption,
                    height: 500,
                    buttons: [{
                        text: 'Parliament chart',
                        onclick: function () {
                            chart.setOption(parliamentOption, true);
                        }
                    }, {
                        text: 'Pie chart',
                        onclick: function () {
                            chart.setOption(pieOption, true);
                        }
                    }],
                });
            });
            </script>

    </body>
</html>