TreemapSeries.js

define(function(require) {

    var SeriesModel = require('../../model/Series');
    var Tree = require('../../data/Tree');
    var zrUtil = require('zrender/core/util');
    var Model = require('../../model/Model');
    var formatUtil = require('../../util/format');
    var encodeHTML = formatUtil.encodeHTML;
    var addCommas = formatUtil.addCommas;


    return SeriesModel.extend({

        type: 'series.treemap',

        dependencies: ['grid', 'polar'],

        defaultOption: {
            calculable: false,
            clickable: true,
            // center: ['50%', '50%'],             // not supported in ec3.
            // size: ['80%', '80%'],               // deprecated, compatible with ec2.
            x: 'center',
            y: 'middle',
            x2: null,
            y2: null,
            width: '80%',
            height: '80%',
            sort: true,                         // Can be null or true or 'asc' or 'desc'
            clipWindow: 'origin',                      // 缩放时窗口大小。'origin' or 'fullscreen'
            squareRatio: 0.5 * (1 + Math.sqrt(5)), // golden ratio
            root: '',
            visualDimension: 'value',                    // 默认第一个维度。
            zoomToNodeRatio: 0.32 * 0.32,                 // zoom to node时 node占可视区域的面积比例。
            roam: true,
            animation: true,
            animationDurationUpdate: 1500,
            animationEasing: 'quadraticInOut',
            breadcrumb: {
                show: true,
                height: 22,
                x: 'center',
                y: 'bottom',
                emptyItemWidth: 25,                    // 空节点宽度
                itemStyle: {
                    normal: {
                        color: 'rgba(0,0,0,0.7)', //'#5793f3',
                        borderColor: 'rgba(255,255,255,0.7)',
                        borderWidth: 1,
                        shadowColor: 'rgba(150,150,150,1)',
                        shadowBlur: 3,
                        shadowOffsetX: 0,
                        shadowOffsetY: 0,
                        textStyle: {
                            color: '#fff',
                            fontFamily: 'Arial',
                            fontSize: 12,
                            fontWeight: 'normal'
                        }
                    },
                    emphasis: {
                        textStyle: {}
                    }
                }
            },
            label: {
                normal: {
                    show: true,
                    position: ['50%', '50%'],      // 可以是 5 '5%' 'insideTopLeft', ...
                    textStyle: {
                        align: 'center',
                        color: '#fff',
                        fontFamily: 'Arial',
                        fontSize: 13,
                        fontStyle: 'normal',
                        fontWeight: 'normal'
                    }
                }
            },
            itemStyle: {
                normal: {
                    color: null,         // 各异 如不需，可设为'none'
                    colorA: null,        // 默认不设置 如不需，可设为'none'
                    colorS: null,        // 默认不设置 如不需，可设为'none'
                    borderWidth: 0,
                    gapWidth: 0,
                    borderColor: '#fff',
                    borderColorS: null   // 如果设置，则borderColor的设置无效，而是取当前节点计算出的颜色，再经由borderColorS处理。
                },
                emphasis: {}
            },
            color: 'none',    // 为数组，表示同一level的color 选取列表。默认空，在level[0].color中取系统color列表。
            colorA: null,   // 为数组，表示同一level的color alpha 选取范围。
            colorS: null,   // 为数组，表示同一level的color alpha 选取范围。
            colorMapping: 'byIndex', // 'byIndex' or 'byValue'
            visibleMin: 10,    // If area less than this threshold (unit: pixel^2), node will not be rendered.
                               // Only works when sort is 'asc' or 'desc'.
            childrenVisibleMin: null, // If area of a node less than this threshold (unit: pixel^2),
                                      // grandchildren will not show.
                                      // Why grandchildren? If not grandchildren but children,
                                      // some siblings show children and some not,
                                      // the appearance may be mess and not consistent,
            levels: []         // Each item: {
                               //     visibleMin, itemStyle, visualDimension, label
                               // }
        },

        /**
         * @override
         */
        getInitialData: function (option, ecModel) {
            var data = option.data || [];
            var rootName = option.name;
            rootName == null && (rootName = option.name);

            // Create a virtual root.
            var root = {name: rootName, children: option.data};
            var value0 = (data[0] || {}).value;

            completeTreeValue(root, zrUtil.isArray(value0) ? value0.length : -1);

            // FIXME
            // sereis.mergeOption 的 getInitData是否放在merge后，从而能直接获取merege后的结果而非手动判断。
            var levels = option.levels || [];

            levels = option.levels = setDefault(levels, ecModel);

            // Make sure always a new tree is created when setOption,
            // in TreemapView, we check whether oldTree === newTree
            // to choose mappings approach among old shapes and new shapes.
            return Tree.createTree(root, this, levels).data;
        },

        /**
         * @public
         */
        getViewRoot: function () {
            var optionRoot = this.option.root;
            var treeRoot = this.getData().tree.root;
            return optionRoot && treeRoot.getNodeByName(optionRoot) || treeRoot;
        },

        /**
         * @override
         * @param {number} dataIndex
         * @param {boolean} [mutipleSeries=false]
         */
        formatTooltip: function (dataIndex) {
            var data = this.getData();
            var value = data.getRawValue(dataIndex);
            var formattedValue = zrUtil.isArray(value)
                ? addCommas(value[0]) : addCommas(value);
            var name = data.getName(dataIndex, true);

            return encodeHTML(name) + ': ' + formattedValue;
        },

        /**
         * Add tree path to tooltip param
         *
         * @override
         * @param {number} dataIndex
         * @return {Object}
         */
        getFormatParams: function (dataIndex) {
            var params = SeriesModel.prototype.getFormatParams.apply(this, arguments);

            var data = this.getData();
            var node = data.tree.getNodeByDataIndex(dataIndex);
            var treePathInfo = params.treePathInfo = [];

            while (node) {
                var nodeDataIndex = node.dataIndex;
                treePathInfo.push({
                    name: node.name,
                    dataIndex: nodeDataIndex,
                    value: data.getRawValue(nodeDataIndex)
                });
                node = node.parentNode;
            }

            treePathInfo.reverse();

            return params;
        },

        /**
         * @public
         * @param {Object} layoutInfo {
         *                                x: containerGroup x
         *                                y: containerGroup y
         *                                width: containerGroup width
         *                                height: containerGroup height
         *                            }
         */
        setLayoutInfo: function (layoutInfo) {
            /**
             * @readOnly
             * @type {Object}
             */
            this.layoutInfo = this.layoutInfo || {};
            zrUtil.extend(this.layoutInfo, layoutInfo);
        }

    });

    /**
     * @param {Object} dataNode
     */
    function completeTreeValue(dataNode, arrValueLength) {
        // Postorder travel tree.
        // If value of none-leaf node is not set,
        // calculate it by suming up the value of all children.
        var sum = 0;

        zrUtil.each(dataNode.children, function (child) {

            completeTreeValue(child, arrValueLength);

            var childValue = child.value;
            zrUtil.isArray(childValue) && (childValue = childValue[0]);

            sum += childValue;
        });

        var thisValue = dataNode.value;

        if (arrValueLength >= 0) {
            if (!zrUtil.isArray(thisValue)) {
                dataNode.value = new Array(arrValueLength);
            }
            else {
                thisValue = thisValue[0];
            }
        }

        if (thisValue == null || isNaN(thisValue)) {
            thisValue = sum;
        }
        // Value should not less than 0.
        if (thisValue < 0) {
            thisValue = 0;
        }

        arrValueLength >= 0
            ? (dataNode.value[0] = thisValue)
            : (dataNode.value = thisValue);
    }

    /**
     * set default to level configuration
     */
    function setDefault(levels, ecModel) {
        var globalColorList = ecModel.get('color');

        if (!globalColorList) {
            return;
        }

        levels = levels || [];
        var hasColorDefine;
        zrUtil.each(levels, function (levelDefine) {
            var model = new Model(levelDefine);
            var modelColor = model.get('color');
            if (model.get('itemStyle.normal.color')
                || (modelColor && modelColor !== 'none')
            ) {
                hasColorDefine = true;
            }
        });

        if (!hasColorDefine) {
            var level0 = levels[0] || (levels[0] = {});
            level0.color = globalColorList.slice();
        }

        return levels;
    }

});