zh/builder/src/echarts3/component/legend/LegendModel.js

import * as echarts from '../../echarts';
import * as zrUtil from 'zrender/src/core/util';
import Model from '../../model/Model';
var LegendModel = echarts.extendComponentModel({
  type: 'legend.plain',
  dependencies: ['series'],
  layoutMode: {
    type: 'box',
    // legend.width/height are maxWidth/maxHeight actually,
    // whereas realy width/height is calculated by its content.
    // (Setting {left: 10, right: 10} does not make sense).
    // So consider the case:
    // `setOption({legend: {left: 10});`
    // then `setOption({legend: {right: 10});`
    // The previous `left` should be cleared by setting `ignoreSize`.
    ignoreSize: true
  },
  init: function (option, parentModel, ecModel) {
    this.mergeDefaultAndTheme(option, ecModel);
    option.selected = option.selected || {};
  },
  mergeOption: function (option) {
    LegendModel.superCall(this, 'mergeOption', option);
  },
  optionUpdated: function () {
    this._updateData(this.ecModel);

    var legendData = this._data; // If selectedMode is single, try to select one

    if (legendData[0] && this.get('selectedMode') === 'single') {
      var hasSelected = false; // If has any selected in option.selected

      for (var i = 0; i < legendData.length; i++) {
        var name = legendData[i].get('name');

        if (this.isSelected(name)) {
          // Force to unselect others
          this.select(name);
          hasSelected = true;
          break;
        }
      } // Try select the first if selectedMode is single


      !hasSelected && this.select(legendData[0].get('name'));
    }
  },
  _updateData: function (ecModel) {
    var legendData = zrUtil.map(this.get('data') || [], function (dataItem) {
      // Can be string or number
      if (typeof dataItem === 'string' || typeof dataItem === 'number') {
        dataItem = {
          name: dataItem
        };
      }

      return new Model(dataItem, this, this.ecModel);
    }, this);
    this._data = legendData;
    var availableNames = zrUtil.map(ecModel.getSeries(), function (series) {
      return series.name;
    });
    ecModel.eachSeries(function (seriesModel) {
      if (seriesModel.legendDataProvider) {
        var data = seriesModel.legendDataProvider();
        availableNames = availableNames.concat(data.mapArray(data.getName));
      }
    });
    /**
     * @type {Array.<string>}
     * @private
     */

    this._availableNames = availableNames;
  },

  /**
   * @return {Array.<module:echarts/model/Model>}
   */
  getData: function () {
    return this._data;
  },

  /**
   * @param {string} name
   */
  select: function (name) {
    var selected = this.option.selected;
    var selectedMode = this.get('selectedMode');

    if (selectedMode === 'single') {
      var data = this._data;
      zrUtil.each(data, function (dataItem) {
        selected[dataItem.get('name')] = false;
      });
    }

    selected[name] = true;
  },

  /**
   * @param {string} name
   */
  unSelect: function (name) {
    if (this.get('selectedMode') !== 'single') {
      this.option.selected[name] = false;
    }
  },

  /**
   * @param {string} name
   */
  toggleSelected: function (name) {
    var selected = this.option.selected; // Default is true

    if (!selected.hasOwnProperty(name)) {
      selected[name] = true;
    }

    this[selected[name] ? 'unSelect' : 'select'](name);
  },

  /**
   * @param {string} name
   */
  isSelected: function (name) {
    var selected = this.option.selected;
    return !(selected.hasOwnProperty(name) && !selected[name]) && zrUtil.indexOf(this._availableNames, name) >= 0;
  },
  defaultOption: {
    // 一级层叠
    zlevel: 0,
    // 二级层叠
    z: 4,
    show: true,
    // 布局方式，默认为水平布局，可选为：
    // 'horizontal' | 'vertical'
    orient: 'horizontal',
    left: 'center',
    // right: 'center',
    top: 0,
    // bottom: null,
    // 水平对齐
    // 'auto' | 'left' | 'right'
    // 默认为 'auto', 根据 x 的位置判断是左对齐还是右对齐
    align: 'auto',
    backgroundColor: 'rgba(0,0,0,0)',
    // 图例边框颜色
    borderColor: '#ccc',
    borderRadius: 0,
    // 图例边框线宽，单位px，默认为0（无边框）
    borderWidth: 0,
    // 图例内边距，单位px，默认各方向内边距为5，
    // 接受数组分别设定上右下左边距，同css
    padding: 5,
    // 各个item之间的间隔，单位px，默认为10，
    // 横向布局时为水平间隔，纵向布局时为纵向间隔
    itemGap: 10,
    // 图例图形宽度
    itemWidth: 25,
    // 图例图形高度
    itemHeight: 14,
    // 图例关闭时候的颜色
    inactiveColor: '#ccc',
    textStyle: {
      // 图例文字颜色
      color: '#333'
    },
    // formatter: '',
    // 选择模式，默认开启图例开关
    selectedMode: true,
    // 配置默认选中状态，可配合LEGEND.SELECTED事件做动态数据载入
    // selected: null,
    // 图例内容（详见legend.data，数组中每一项代表一个item
    // data: [],
    // Tooltip 相关配置
    tooltip: {
      show: false
    }
  }
});
export default LegendModel;