160 lines
3.3 KiB
JavaScript
160 lines
3.3 KiB
JavaScript
import * as echarts from '../../ec-canvas/echarts';
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let chart = null;
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function initChart(canvas, width, height, dpr) {
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chart = echarts.init(canvas, null, {
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width: width,
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height: height,
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devicePixelRatio: dpr // new
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});
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canvas.setChart(chart);
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var option = {
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tooltip: {
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trigger: 'axis',
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axisPointer: { // 坐标轴指示器，坐标轴触发有效
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type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
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}
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},
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legend: {
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data: ['热度', '正面', '负面']
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},
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grid: {
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left: 20,
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right: 20,
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bottom: 15,
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top: 40,
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containLabel: true
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},
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xAxis: [
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{
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type: 'value',
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axisLine: {
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lineStyle: {
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color: '#999'
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}
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},
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axisLabel: {
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color: '#666'
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}
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}
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],
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yAxis: [
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{
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type: 'category',
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axisTick: { show: false },
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data: ['汽车之家', '今日头条', '百度贴吧', '一点资讯', '微信', '微博', '知乎'],
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axisLine: {
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lineStyle: {
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color: '#999'
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}
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},
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axisLabel: {
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color: '#666'
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}
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}
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],
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series: [
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{
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name: '热度',
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type: 'bar',
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label: {
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normal: {
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show: true,
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position: 'inside'
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}
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},
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data: [300, 270, 340, 344, 300, 320, 310],
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itemStyle: {
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// emphasis: {
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// color: '#37a2da'
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// }
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}
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},
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{
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name: '正面',
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type: 'bar',
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stack: '总量',
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label: {
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normal: {
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show: true
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}
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},
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data: [120, 102, 141, 174, 190, 250, 220],
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itemStyle: {
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// emphasis: {
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// color: '#32c5e9'
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// }
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}
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},
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{
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name: '负面',
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type: 'bar',
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stack: '总量',
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label: {
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normal: {
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show: true,
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position: 'left'
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}
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},
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data: [-20, -32, -21, -34, -90, -130, -110],
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itemStyle: {
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// emphasis: {
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// color: '#67e0e3'
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// }
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}
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}
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]
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};
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chart.setOption(option);
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return chart;
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}
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Page({
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onShareAppMessage: function (res) {
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return {
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title: 'ECharts 可以在微信小程序中使用啦！',
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path: '/pages/index/index',
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success: function () { },
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fail: function () { }
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}
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},
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data: {
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ec: {
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onInit: initChart
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}
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},
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onReady() {
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// tips:正常逻辑不建议这么写，需要保证initChart之后再执行下载
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setTimeout(() => {
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this.save();
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}, 1000);
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},
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save() {
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const ecComponent = this.selectComponent('#mychart-dom-save');
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// 先保存图片到临时的本地文件，然后存入系统相册
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ecComponent.canvasToTempFilePath({
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success: res => {
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console.log("tempFilePath:", res.tempFilePath)
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// 存入系统相册
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wx.saveImageToPhotosAlbum({
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filePath: res.tempFilePath || '',
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success: res => {
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console.log("success", res)
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},
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fail: res => {
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console.log("fail", res)
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}
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})
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},
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fail: res => console.log(res)
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});
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}
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});
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