React-Chart.js 图例 onClick 函数 [英] React-Chart.js legend onClick function
问题描述
我正在使用 Chart.js 的反应包装器处理具有多个堆叠数据集的条形图(https://github.com/reactchartjs/react-chartjs-2).
I'm working on a bar chart with multiple stacked datasets using the react wrapper for Chart.js(https://github.com/reactchartjs/react-chartjs-2).
我一直试图让图表一次只显示一个数据集，但我无法找到正确的函数.
I've been trying to make the chart show only one dataset at a time, but I'm having trouble coming up with the right function.
我希望图表以隐藏的所有数据集开始(这部分很简单)，当您单击图例时，我希望图表仅显示选定的数据集.因此，当您单击一个然后另一个时，我希望隐藏第一个.
I want the chart to start off with all the datasets hidden(this part was easy) and when you click the legend I want the chart to only show only the selected dataset. So when you click one and then another I want the first one to get hidden.
我知道我需要使用图例 onClick 选项，但我不知道如何设置它.
I know I need to use the legend onClick option but I can't figure out how to set it up.
任何帮助将不胜感激，谢谢！
Any help would be appreciated, thanks!
这是有问题的图表:https://codesandbox.io/s/lucid-river-xhvtd?file=/src/charts/bar_chart.js
推荐答案
您可以将所有数据集设置为隐藏，然后仅单击显示:
You can set all datasets to hide and then only the one clicked to show:
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink',
hidden: true
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange',
hidden: true
},
{
label: '# of People',
data: [3, 1, 15, 4, 9, 12],
borderColor: 'cyan',
hidden: true
}
]
},
options: {
plugins: {
legend: {
onClick: (evt, legendItem, legend) => {
const index = legendItem.datasetIndex;
const ci = legend.chart;
legend.chart.data.datasets.forEach((d, i) => {
ci.hide(i);
d.hidden = true;
})
ci.show(index);
legendItem.hidden = false;
ci.update();
}
}
}
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
</body>这篇关于React-Chart.js 图例 onClick 函数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！
