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我正在使用charts.js。對於我目前的需求，我設法找到一種方法來配置工具提示，無論懸停事件是否始終可見。我的問題是，工具提示可見性不符合數據集行爲。在charts.js上，您可以單擊數據集以將其從圖中移除。我的圖表是這樣做的，但工具提示仍然可見，浮動在圖形中，沒有數據集可以表示。點擊標籤時，是否有隱藏數據集數據的方法？如何使用各自的數據集隱藏工具提示
這是我說的當前狀態的一個例子。 https://jsfiddle.net/CaioSantAnna/ddejheg0/。
HTML
<canvas id="linha"></canvas>
的Javascript
Chart.plugins.register({
beforeRender: function (chart) {
if (chart.config.options.showAllTooltips) {
// create an array of tooltips
// we can't use the chart tooltip because there is only one tooltip per chart
chart.pluginTooltips = [];
chart.config.data.datasets.forEach(function (dataset, i) {
chart.getDatasetMeta(i).data.forEach(function (sector, j) {
chart.pluginTooltips.push(new Chart.Tooltip({
_chart: chart.chart,
_chartInstance: chart,
_data: chart.data,
_options: chart.options.tooltips,
_active: [sector]
}, chart));
});
});
// turn off normal tooltips
chart.options.tooltips.enabled = false;
}
},
afterDraw: function (chart, easing) {
if (chart.config.options.showAllTooltips) {
// we don't want the permanent tooltips to animate, so don't do anything till the animation runs atleast once
if (!chart.allTooltipsOnce) {
if (easing !== 1)
return;
chart.allTooltipsOnce = true;
}
// turn on tooltips
chart.options.tooltips.enabled = true;
Chart.helpers.each(chart.pluginTooltips, function (tooltip) {
tooltip.initialize();
tooltip.update();
// we don't actually need this since we are not animating tooltips
tooltip.pivot();
tooltip.transition(easing).draw();
});
chart.options.tooltips.enabled = false;
}
}
});
ctx = document.getElementById("linha");
var linha = new Chart(ctx, {
type: 'line',
data: {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
{
label: "My First dataset",
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(75,192,192,0.4)",
borderColor: "rgba(75,192,192,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 1,
pointHitRadius: 10,
data: [65, 59, 80, 81, 56, 55, 40],
spanGaps: false,
responsive: true,
animation: true,
},
{
label: "Second dataset",
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(0,0,0,0.4)",
borderColor: "rgba(0,0,0,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(0,0,0,1)",
pointBackgroundColor: "#fff",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(0,0,0,1)",
pointHoverBorderColor: "rgba(0,0,0,1)",
pointHoverBorderWidth: 2,
pointRadius: 1,
pointHitRadius: 10,
data: [13, 78, 60, 75, 90, 10, 27],
spanGaps: false,
responsive: true,
animation: true,
}
]
},
options: {
tooltips: {
callbacks: {
title: function (tooltipItem, data) { return "" },
label: function (tooltipItem, data) {
var value = data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
var datasetLabel = data.datasets[tooltipItem.datasetIndex].label || 'Other';
var label = data.labels[tooltipItem.index];
return value;
}
}
},showAllTooltips: true
}
});
要重現此問題，只需點擊圖上的頂部的一個標籤。
在此先感謝。