如何使用angular 7缩放chart.js中的图表 [英] How to zoom charts in chart.js using angular 7

问题描述

我有一个line-chart，我想缩放但无法执行.这是我的代码

I have a line-chart and I want to zoom it but unable to do it. Here is my code

let ctx = document.getElementById('myChart')

let chart = new Chart(ctx, {
      type: 'line',
      data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
          label: '# of Votes',
          data: [7, 10, 3, 5, 2, 3],
          fill: true,
          backgroundColor: 'orange',
          borderColor: 'green',
          pointBorderColor: 'red',
          pointBackgroundColor: 'red'
        }]
      },
      options: {
        plugins: {
          pan: {
            enabled: true,
            mode: 'x',
            onPan: function () { console.log('I was panned!!!'); }
          },
          zoom: {
            enabled: true,
            drag: true,
            mode: 'x',
            onZoom: function () { console.log('I was zoomed!!!'); }
          },
        },
        responsive: true,
      }
    })

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.min.js"></script>

<div class="row">
    <div class="col d-flex justify-content-center">
        <canvas id="myChart" style="max-width:95%;height:300px !important;"></canvas>
    </div>
</div>

我将以下plugin用于zooming

https://github.com/chartjs/chartjs-plugin-zoom#readme

我还在项目中加入了hammerjs和angular/animations.

I have also included hammerjs and angular/animations in my project.

更新

为什么打字稿不知道pan和zoom?

Why pan and zoom are unknown to typescript?

// package.json
"chart.js": "^2.7.3",
"chartjs-plugin-zoom": "^0.6.6",

推荐答案

首先，您需要运行npm install --save chartjs-plugin-zoom与npm一起安装.

First you need to Run npm install --save chartjs-plugin-zoom to install with npm.

然后在您的ts文件中导入"chartjs-plugin-zoom". 并编写这样的插件:

then do import 'chartjs-plugin-zoom' in your ts file. and write plugin like this :

    plugins: {
      zoom: {
        pan: {
          enabled: true,
          mode: 'x'
        },
        zoom: {
          enabled: true,
          mode: 'x'
        }
      }
    },  

这篇关于如何使用angular 7缩放chart.js中的图表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！