现在在项目中需要实现echarts图表的tooltip的轮播
在echarts2.0的API中可以找到如下描述:
这里我们知道,要实现轮播主要就是使用dispatchAction
以下是实现代码:
var count = 0; var timeTicket = null; timeTicket && clearInterval(timeTicket); timeTicket = setInterval(function () { //设置定时循环 myChart.dispatchAction({ type: "downplay", //serieIndex的索引值 seriesIndex: 0 //serieIndex的索引值 可以触发多个 }); myChart.dispatchAction({ type: "highlight",//取消高亮指定的数据图形 seriesIndex: 0, dataIndex: count }); myChart.dispatchAction({ type: "showTip", //显示浮云框 seriesIndex: 0, dataIndex: count }); count++; if (count >= num) { count = 0 }
}, 3000);
上述代码只能实现循环,但是鼠标的移入移出事件会受到影响
还需添加鼠标的mouseover事件和mouseout事件:
var count = 0; var timeTicket = null; timeTicket && clearInterval(timeTicket); timeTicket = setInterval(function () { myChart.dispatchAction({ type: "downplay", seriesIndex: 0 //serieIndex的索引值 可以触发多个 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: count }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: count }); count++; if (count >= num) { count = 0 } }, time); myChart.on("mouseover", function (params) { clearInterval(timeTicket); myChart.dispatchAction({ type: "downplay", seriesIndex: 0 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: params.dataIndex }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: params.dataIndex }); }); myChart.on("mouseout", function () { timeTicket && clearInterval(timeTicket); timeTicket = setInterval(function () { myChart.dispatchAction({ type: "downplay", seriesIndex: 0 //serieIndex的索引值 可以触发多个 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: count }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: count }); count++; if (count >= 17) { count = 0 } }, 3000); });
通过上面代码可以实现tooltip的轮播效果,并且在鼠标的移入时,不会影响tooltip的出现,不会造成无法查看当前类目的tooltip。
因为是在Vue项目中,还需进行一次封装,方便被其他模块引用(将代码封装,并命名为tools.js):
/** * echarts tooltip 自动轮播 * @author liuwei * @param myChart //初始化echarts的实例 * @param option //指定图表的配置项和数据 * @param num //类目数量(原因:循环时达到最大值后,使其从头开始循环) * @param time //轮播间隔时长 */ export function autoHover(myChart, option, num, time) { var defaultData = { //设置默认值 time: 2000, num: 100 }; if(!time){ time = defaultData.time; } if(!num){ num = defaultData.num; } var count = 0; var timeTicket = null; timeTicket && clearInterval(timeTicket); timeTicket = setInterval(function () { myChart.dispatchAction({ type: "downplay", seriesIndex: 0 //serieIndex的索引值 可以触发多个 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: count }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: count }); count++; if (count >= num) { count = 0 } }, time); myChart.on("mouseover", function (params) { clearInterval(timeTicket); myChart.dispatchAction({ type: "downplay", seriesIndex: 0 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: params.dataIndex }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: params.dataIndex }); }); myChart.on("mouseout", function () { timeTicket && clearInterval(timeTicket); timeTicket = setInterval(function () { myChart.dispatchAction({ type: "downplay", seriesIndex: 0 //serieIndex的索引值 可以触发多个 }); myChart.dispatchAction({ type: "highlight", seriesIndex: 0, dataIndex: count }); myChart.dispatchAction({ type: "showTip", seriesIndex: 0, dataIndex: count }); count++; if (count >= 17) { count = 0 } }, 3000); }); } export default { autoHover }
接下来要做的就是在vue文件中引用:
<template> <div class="wrapper"> <div class="bar" id="bar"></div> </div> </template> <script> import tools from "tools"; //引入tools.js export default { components: {}, props: {}, data() { return {}; }, created() {}, mounted() { this.drawRightLine(); }, watch: {}, computed: {}, methods: { drawRightLine() { // 基于准备好的dom,初始化echarts实例 var myChart = echarts.init(document.getElementById("rightLine")); // 指定图表的配置项和数据 var option = { title: { text: "ECharts 入门示例" }, tooltip: {}, legend: { data: ["销量"] }, xAxis: { data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"] }, yAxis: {}, series: [ { name: "销量", type: "bar", data: [5, 20, 36, 10, 10, 20] } ] }; // 使用刚指定的配置项和数据显示图表。 myChart.setOption(option); //使用轮播插件,填入相关参数 tools.autoHover(myChart, option, 17, 3000); } } }; </script> <style scoped> .wrapper { height: 100%; width: 100%; } .bar { height: 100%; width: 100%; } </style>