我有一个chart.js饼状图。当我更新数据集时,我希望饼状图分段能够平滑地调整大小以适应新值(即大小增长/缩小)。
饼状图每次都进行旋转转换。我可以在设置新数据后使用.update('none')关闭旋转过渡,但随后饼图立即改变,没有过渡。
有办法做到这一点吗?
我的饼状图设置代码是:
chartRegion_Emissions_ANZIC_BreakdownChart = new Chart(ctx, {
type: 'pie',
options: {
responsive: true,
maintainAspectRatio: false,
plugins: {
tooltip: {
mode: 'nearest',
callbacks: {
label: function (tooltipItem, data) {
return tooltipItem.label + ': ' + addCommas(tooltipItem.raw) + 'kt';
}
}
}
}
},
data: {
labels: [],
datasets: []
}
});
和更新代码(AJAX请求后)是…
chartRegion_Emissions_ANZIC_BreakdownChart.data.labels = data.labels;
chartRegion_Emissions_ANZIC_BreakdownChart.data.datasets[0] = data.data[0];
chartRegion_Emissions_ANZIC_BreakdownChart.update();//'none');
我正在使用chart.js版本3.3.2…谢谢你的帮助
欢呼你覆盖了整个数据集,如果你不这样做,只改变数据集的数据,它会收缩/扩展数据段。
的例子:
const options = {
type: 'pie',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
backgroundColor: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
}
]
},
options: {}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
const chart = new Chart(ctx, options);
document.getElementById('update').addEventListener('click', () => {
chart.data.datasets[0].data = [10, 5, 12, 6, 8, 2];
chart.update();
})
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<button id="update">
update data
</button>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.4.1/chart.js"></script>
</body>