chart.js
Version:
Simple HTML5 charts using the canvas element.
129 lines (118 loc) • 3.17 kB
HTML
<html>
<head>
<title>Custom Tooltips using Data Points</title>
<script src="../../dist/Chart.bundle.js"></script>
<script src="../utils.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<style>
canvas{
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
.chartjs-tooltip {
opacity: 1;
position: absolute;
background: rgba(0, 0, 0, .7);
color: white;
border-radius: 3px;
-webkit-transition: all .1s ease;
transition: all .1s ease;
pointer-events: none;
-webkit-transform: translate(-50%, 0);
transform: translate(-50%, 0);
padding: 4px;
}
.chartjs-tooltip-key {
display: inline-block;
width: 10px;
height: 10px;
}
</style>
</head>
<body>
<div id="canvas-holder1" style="width:75%;">
<canvas id="chart1"></canvas>
<div class="chartjs-tooltip" id="tooltip-0"></div>
<div class="chartjs-tooltip" id="tooltip-1"></div>
</div>
<script>
var customTooltips = function (tooltip) {
$(this._chart.canvas).css("cursor", "pointer");
var positionY = this._chart.canvas.offsetTop;
var positionX = this._chart.canvas.offsetLeft;
$(".chartjs-tooltip").css({
opacity: 0,
});
if (!tooltip || !tooltip.opacity) {
return;
}
if (tooltip.dataPoints.length > 0) {
tooltip.dataPoints.forEach(function (dataPoint) {
var content = [dataPoint.xLabel, dataPoint.yLabel].join(": ");
var $tooltip = $("#tooltip-" + dataPoint.datasetIndex);
$tooltip.html(content);
$tooltip.css({
opacity: 1,
top: positionY + dataPoint.y + "px",
left: positionX + dataPoint.x + "px",
});
});
}
};
var color = Chart.helpers.color;
var lineChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [{
label: "My First dataset",
backgroundColor: color(window.chartColors.red).alpha(0.2).rgbString(),
borderColor: window.chartColors.red,
pointBackgroundColor: window.chartColors.red,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}, {
label: "My Second dataset",
backgroundColor: color(window.chartColors.blue).alpha(0.2).rgbString(),
borderColor: window.chartColors.blue,
pointBackgroundColor: window.chartColors.blue,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}]
};
window.onload = function() {
var chartEl = document.getElementById("chart1");
var chart = new Chart(chartEl, {
type: "line",
data: lineChartData,
options: {
title:{
display: true,
text: "Chart.js - Custom Tooltips using Data Points"
},
tooltips: {
enabled: false,
mode: 'index',
intersect: false,
custom: customTooltips
}
}
});
};
</script>
</body>
</html>