<html>
<head>
<script type="text/javascript" src="Chart.js"></script>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<link rel="stylesheet" type="text/css" href="trainchart.css">
</head>
<body>
<div class="chartWrapper">
<div class="chartAreaWrapper">
<div class="chartAreaWrapper2">
<canvas id="chart-Test" height="300" width="1200"></canvas>
</div>
</div>
<canvas id="axis-Test" height="300" width="0"></canvas>
</div>
<script>
$(document).ready(function () {
function generateLabels() {
var chartLabels = [];
for (x = 0; x < 100; x++) {
chartLabels.push("Label" + x);
}
return chartLabels;
}
function generateData() {
var chartData = [];
for (x = 0; x < 200; x++) {
chartData.push(Math.floor((Math.random() * 100) + 1));
}
console.log(chartData)
return chartData;
}
function addData(numData, chart) {
for (var i = 0; i < numData; i++) {
chart.data.datasets[0].data.push(Math.random() * 100);
chart.data.labels.push("Label" + i);
var newwidth = $('.chartAreaWrapper2').width() + 60;
$('.chartAreaWrapper2').width(newwidth);
}
}
var chartData = {
labels: generateLabels(),
datasets: [{
label: "Test Data Set",
data: generateData()
}]
};
$(function () {
var rectangleSet = false;
var canvasTest = $('#chart-Test');
var chartTest = new Chart(canvasTest, {
type: 'bar',
data: chartData,
maintainAspectRatio: false,
responsive: true,
options: {
tooltips: {
titleFontSize: 0,
titleMarginBottom: 0,
bodyFontSize: 12
},
legend: {
display: false
},
scales: {
xAxes: [{
ticks: {
fontSize: 12,
display: false
}
}],
yAxes: [{
ticks: {
fontSize: 12,
beginAtZero: true
}
}]
},
animation: {
onComplete: function () {
if (!rectangleSet) {
var scale = window.devicePixelRatio;
var sourceCanvas = chartTest.chart.canvas;
var copyWidth = chartTest.scales['y-axis-0'].width - 10;
var copyHeight = chartTest.scales['y-axis-0'].height + chartTest.scales['y-axis-0'].top + 10;
var targetCtx = document.getElementById("axis-Test").getContext("2d");
targetCtx.scale(scale, scale);
targetCtx.canvas.width = copyWidth * scale;
targetCtx.canvas.height = copyHeight * scale;
targetCtx.canvas.style.width = `${copyWidth}px`;
targetCtx.canvas.style.height = `${copyHeight}px`;
targetCtx.drawImage(sourceCanvas, 0, 0, copyWidth * scale, copyHeight * scale, 0, 0, copyWidth * scale, copyHeight * scale);
var sourceCtx = sourceCanvas.getContext('2d');
// Normalize coordinate system to use css pixels.
sourceCtx.clearRect(0, 0, copyWidth * scale, copyHeight * scale);
rectangleSet = true;
}
},
onProgress: function () {
if (rectangleSet === true) {
var copyWidth = chartTest.scales['y-axis-0'].width;
var copyHeight = chartTest.scales['y-axis-0'].height + chartTest.scales['y-axis-0'].top + 10;
var sourceCtx = chartTest.chart.canvas.getContext('2d');
sourceCtx.clearRect(0, 0, copyWidth, copyHeight);
}
}
}
}
});
addData(5, chartTest);
});
});
</script>
</body>
</html>