我正在尝试使用带有多个数据集的圆环图,并使用tooltipTemplate功能来自定义工具提示内的文本,但没有任何作用。这在以前的Chart js版本中有效,但不支持多个数据集。有人可以帮忙吗?以下是我的代码:
options: {
tooltips: {
tooltipTemplate: "<%if (label){%><%=value%><%} else {%> No data <%}%>",
},
}
正如potatopeelings在评论中提到的那样,您必须为工具提示设置回调。
这是一个例子:
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
var datasetLabel = data.datasets[tooltipItem.datasetIndex].label || 'Other';
var label = data.labels[tooltipItem.index];
return datasetLabel + ': ' + label;
}
}
}
}
现场演示
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'doughnut',
data: {
labels: ["Men", "Women", "Unknown"],
datasets: [{
label: 'Sweden',
data: [60, 40, 20],
backgroundColor: ['rgba(158, 216, 202, 0.75)', 'rgba(255, 150, 162, 0.75)', 'rgba(160, 160, 160, 0.75)']
}, {
label: 'Netherlands',
data: [40, 70, 10],
backgroundColor: ['rgba(158, 216, 202, 0.5)', 'rgba(255, 150, 162, 0.5)', 'rgba(160, 160, 160, 0.5)']
}, {
data: [33, 33, 34],
backgroundColor: ['rgba(158, 216, 202, 0.25)', 'rgba(255, 150, 162, 0.25)', 'rgba(160, 160, 160, 0.25)']
}]
},
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
var datasetLabel = data.datasets[tooltipItem.datasetIndex].label || 'Other';
var label = data.labels[tooltipItem.index];
return datasetLabel + ': ' + label;
}
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.2/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>
Chart.js 1.x tooltipsTemplate相当于Chart.js 2.x中的options.tooltips.callbacks.title
:
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'doughnut',
data: {
labels: [
"Men",
"Women",
"Unknown"
],
datasets: [{
label: 'Sweden',
data: [60, 40, 20],
backgroundColor: [
'rgba(158, 216, 202, 0.75)',
'rgba(255, 150, 162, 0.75)',
'rgba(160, 160, 160, 0.75)'
]
}, {
label: 'Netherlands',
data: [40, 70, 10],
backgroundColor: [
'rgba(158, 216, 202, 0.5)',
'rgba(255, 150, 162, 0.5)',
'rgba(160, 160, 160, 0.5)'
]
}, {
data: [33, 33, 34],
backgroundColor: [
'rgba(158, 216, 202, 0.25)',
'rgba(255, 150, 162, 0.25)',
'rgba(160, 160, 160, 0.25)'
]
}]
},
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
return 'This value ' + tooltipItem.yLabel;
},
title: function(tooltipItem, data) {
return 'The tooltip title ' + tooltipItem[0].xLabel;
}
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.2/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>
你必须为工具提示options
设置mode
到label
以显示多个工具提示
options: {
tooltips: {
mode : 'label'
}
}