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This article mainly introduces the relevant knowledge of "how to achieve cascading bar chart in Vue+ Antv F2". The editor shows you the operation process through an actual case. The operation method is simple and fast, and it is practical. I hope this article "how to achieve cascading bar chart in Vue+ Antv F2" can help you solve the problem.

First, create the canvas tag. Second, write the chart drawing code methods: {/ / obtain the patent case Chart icon information getCaseChartData () {var _ this = this. Var params = {dataType:_this.caseDataType, beginDate:'', endDate:_this.endDate} _ this.$http.get ('/ api/patent/StatisticsPatentChartAmount' {params:params}) .then (res = > {if (res.status = = 200) {for (var I = 0) I

< res.data.length; i++){ if(res.data[i].dataType == "monthPatent"){res.data[i].dataType = '新立案'} else if(res.data[i].dataType == "applyPatent"){res.data[i].dataType = '新申请'} else if(res.data[i].dataType == "PCTPatent"){res.data[i].dataType = 'PCT国际'} else if(res.data[i].dataType == "otherPatent"){res.data[i].dataType = '其他案件'} else {} res.data[i].date = res.data[i].date+"-01" + " 00:00:00" } _this.caseData = res.data; _this.$options.methods.caseChart.bind(this)(); }else{ } }) .catch(error =>

{})}, caseChart () {var _ this = this / / create Chart object _ this.casechart = new this.$F2.Chart ({id: 'caseChart', pixelRatio: window.devicePixelRatio, / / specify resolution}) / / source load data _ this.casechart.source (JSON.parse (JSON.stringify (this.caseData)), {date: {/ / x axis type: 'timeCat', tickCount: 6, / / range: [0.1,0.9], mask:'YY-MM' }, / / amount: {/ /}}) _ this.casechart.tooltip ({custom: true, / / Custom tooltip content box onChange: function onChange (obj) {const legend = _ this.casechart.get ('legendController'). Legends.top [0]; const tooltipItems = obj.items; const legendItems = legend.items; const map = {} LegendItems.forEach (function (item) {map [item.name] = item;}); tooltipItems.forEach (function (item) {const name = item.name; const value = item.value) If (map [name]) {map [name] .value = value;}}); / / legend.setItems (_ .values (map)) }, onHide: function onHide () {const legend = _ this.casechart.get ('legendController'). Legends.top [0]; legend.setItems (_ this.casechart.getLegendItems () .country);}}); var barWidth = 16 * (window.innerWidth / 375) / / create the syntax of the graph, draw the graph, determine the position of the graph by date and amount attributes, and map the date to the x-axis. Amount maps to y axis _ this.casechart.interval () .position ('date*amount') .color (' dataType') .adjust ('stack') .size (barWidth) / / render chart _ this.casechart.render () }, mounted () {var v = this; this.$nextTick (() = > {v.caseChart ();});}, third, show the effect

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