/**
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* echarts图表类：事件河流图
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*
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* @desc echarts基于Canvas，纯Javascript图表库，提供直观，生动，可交互，可个性化定制的数据统计图表。
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* @author clmtulip (车丽美, clmtulip@gmail.com)
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*
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*/
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define(function (require) {
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var ChartBase = require('./base');
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var eventRiverLayout = require('../layout/eventRiver');
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// 图形依赖
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var PolygonShape = require('zrender/shape/Polygon');
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// 组件依赖
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require('../component/axis');
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require('../component/grid');
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require('../component/dataZoom');
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var ecConfig = require('../config');
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// 事件河流图默认参数
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ecConfig.eventRiver = {
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zlevel: 0, // 一级层叠
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z: 2, // 二级层叠
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clickable: true,
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legendHoverLink: true,
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itemStyle: {
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normal: {
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// color: 各异,
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borderColor: 'rgba(0,0,0,0)',
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borderWidth: 1,
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label: {
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show: true,
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position: 'inside', // 可选为'left'|'right'|'top'|'bottom'
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formatter: '{b}'
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// textStyle: null // 默认使用全局文本样式，详见TEXTSTYLE
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}
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},
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emphasis: {
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// color: 各异,
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borderColor: 'rgba(0,0,0,0)',
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borderWidth: 1,
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label: {
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show: true
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}
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}
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}
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};
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var ecData = require('../util/ecData');
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var ecDate = require('../util/date');
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var zrUtil = require('zrender/tool/util');
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var zrColor = require('zrender/tool/color');
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/**
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* 构造函数
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* @param {Object} messageCenter echart消息中心
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* @param {ZRender} zr zrender实例
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* @param {Object} option 数据
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* @param {Object} component 组件
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*/
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function EventRiver(ecTheme, messageCenter, zr, option, myChart) {
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// 图表基类
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ChartBase.call(this, ecTheme, messageCenter, zr, option, myChart);
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var self = this;
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self._ondragend = function () {
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self.isDragend = true;
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};
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this.refresh(option);
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}
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EventRiver.prototype = {
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type: ecConfig.CHART_TYPE_EVENTRIVER,
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_buildShape: function() {
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var series = this.series;
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this.selectedMap = {};
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// 数据预处理
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this._dataPreprocessing();
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var legend = this.component.legend;
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// 调用布局算法计算事件在Y轴上的位置
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var eventRiverSeries = [];
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for (var i = 0; i < series.length; i++) {
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if (series[i].type === this.type) {
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series[i] = this.reformOption(series[i]);
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this.legendHoverLink = series[i].legendHoverLink || this.legendHoverLink;
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var serieName = series[i].name || '';
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// 系列图例开关
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this.selectedMap[serieName] = legend ? legend.isSelected(serieName) : true;
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if (!this.selectedMap[serieName]) {
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continue;
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}
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this.buildMark(i);
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eventRiverSeries.push(this.series[i]);
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}
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}
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eventRiverLayout(
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eventRiverSeries,
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this._intervalX,
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this.component.grid.getArea()
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);
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// 绘制事件河
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this._drawEventRiver();
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this.addShapeList();
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},
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/**
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* 处理数据
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*/
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_dataPreprocessing: function() {
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// 将年月日的时间转化为平面坐标
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var series = this.series;
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var xAxis;
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var evolutionList;
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for (var i = 0, iLen = series.length; i < iLen; i++) {
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if (series[i].type === this.type) {
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xAxis = this.component.xAxis.getAxis(series[i].xAxisIndex || 0);
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for (var j = 0, jLen = series[i].data.length; j < jLen; j++) {
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evolutionList = series[i].data[j].evolution;
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for (var k = 0, kLen = evolutionList.length; k < kLen; k++) {
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evolutionList[k].timeScale = xAxis.getCoord(
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ecDate.getNewDate(evolutionList[k].time) - 0
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);
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// evolutionList[k].valueScale = evolutionList[k].value;
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// modified by limei.che, to normalize the value range
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evolutionList[k].valueScale = Math.pow(evolutionList[k].value, 0.8);
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}
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}
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}
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}
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// 尾迹长度
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this._intervalX = Math.round(this.component.grid.getWidth() / 40);
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},
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/**
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* 绘制事件河流
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*/
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_drawEventRiver: function(){
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var series = this.series;
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for (var i = 0; i < series.length; i++) {
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var serieName = series[i].name || '';
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if (series[i].type === this.type && this.selectedMap[serieName]) {
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for (var j = 0; j < series[i].data.length; j++) {
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this._drawEventBubble(series[i].data[j], i, j);
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}
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}
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}
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},
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/**
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* 绘制气泡图
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*/
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_drawEventBubble: function(oneEvent, seriesIndex, dataIndex) {
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var series = this.series;
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var serie = series[seriesIndex];
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var serieName = serie.name || '';
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var data = serie.data[dataIndex];
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var queryTarget = [data, serie];
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var legend = this.component.legend;
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var defaultColor = legend ? legend.getColor(serieName) : this.zr.getColor(seriesIndex);
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// 多级控制
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var normal = this.deepMerge(queryTarget, 'itemStyle.normal') || {};
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var emphasis = this.deepMerge(queryTarget, 'itemStyle.emphasis') || {};
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var normalColor = this.getItemStyleColor(normal.color, seriesIndex, dataIndex, data)
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|| defaultColor;
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var emphasisColor = this.getItemStyleColor(
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emphasis.color, seriesIndex, dataIndex, data
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)
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|| (typeof normalColor === 'string'
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? zrColor.lift(normalColor, -0.2)
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: normalColor
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);
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var pts = this._calculateControlPoints(oneEvent);
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var eventBubbleShape = {
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zlevel: this.getZlevelBase(),
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z: this.getZBase(),
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clickable: this.deepQuery(queryTarget, 'clickable'),
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style: {
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pointList: pts,
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smooth: 'spline',
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brushType: 'both',
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lineJoin : 'round',
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color: normalColor,
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lineWidth: normal.borderWidth,
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strokeColor: normal.borderColor
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},
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highlightStyle:{
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color: emphasisColor,
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lineWidth: emphasis.borderWidth,
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strokeColor: emphasis.borderColor
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},
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draggable: 'vertical',
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ondragend : this._ondragend
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};
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eventBubbleShape = new PolygonShape(eventBubbleShape);
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this.addLabel(eventBubbleShape, serie, data, oneEvent.name);
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ecData.pack(
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eventBubbleShape,
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series[seriesIndex], seriesIndex,
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series[seriesIndex].data[dataIndex], dataIndex,
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series[seriesIndex].data[dataIndex].name
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);
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this.shapeList.push(eventBubbleShape);
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},
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/**
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* 根据时间-热度，计算气泡形状的控制点
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*/
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_calculateControlPoints: function(oneEvent) {
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var intervalX = this._intervalX;
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var posY = oneEvent.y;
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var evolution = oneEvent.evolution;
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var n = evolution.length;
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if (n < 1) {
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return;
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}
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var time = [];
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var value = [];
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for (var i = 0; i < n; i++) {
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time.push(evolution[i].timeScale);
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value.push(evolution[i].valueScale);
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}
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var pts = [];
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// 从左向右绘制气泡的上半部分控制点
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// 第一个矩形的左端点
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pts.push([time[0], posY]);
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// 从一个矩形 到 倒数第二个矩形 上半部分的中点
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var i = 0;
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for (i = 0; i < n - 1; i++) {
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pts.push([(time[i] + time[i + 1]) / 2.0, value[i] / -2.0 + posY]);
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}
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// 最后一个矩形上半部分的中点
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pts.push([(time[i] + (time[i] + intervalX)) / 2.0, value[i] / -2.0 + posY]);
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// 最后一个矩形的右端点
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pts.push([time[i] + intervalX, posY]);
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// 从右向左绘制气泡的下半部分控制点
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// 最后一个矩形下半部分的中点
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pts.push([(time[i] + (time[i] + intervalX)) / 2.0, value[i] / 2.0 + posY]);
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// 从倒数第二个矩形 到 一个矩形 下半部分的中点，由于polygon是闭合的，故不需要再加入左端点
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for (i = n - 1; i > 0; i--) {
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pts.push([(time[i] + time[i - 1]) / 2.0, value[i - 1] / 2.0 + posY]);
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}
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return pts;
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},
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/**
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* 数据项被拖拽出去
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*/
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ondragend : function (param, status) {
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if (!this.isDragend || !param.target) {
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// 没有在当前实例上发生拖拽行为则直接返回
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return;
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}
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// 别status = {}赋值啊！！
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status.dragOut = true;
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status.dragIn = true;
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status.needRefresh = false; // 会有消息触发fresh，不用再刷一遍
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// 处理完拖拽事件后复位
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this.isDragend = false;
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},
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/**
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* 刷新
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*/
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refresh: function(newOption) {
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if (newOption) {
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this.option = newOption;
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this.series = newOption.series;
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}
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this.backupShapeList();
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this._buildShape();
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}
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};
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zrUtil.inherits(EventRiver, ChartBase);
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// 图表注册
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require('../chart').define('eventRiver', EventRiver);
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return EventRiver;
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});
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