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zoom-time.html
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zoom-time.html
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<!doctype html>
<html>
<head>
<title>Line Chart</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js"></script>
<script src="../node_modules/chart.js/dist/chart.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
<script src="../node_modules/hammerjs/hammer.min.js"></script>
<script src="../dist/chartjs-plugin-zoom.js"></script>
<style>
canvas {
user-select: none;
}
</style>
</head>
<body>
<div style="width:75%;">
<button onclick="resetZoom()">Reset Zoom</button>
<button id="drag-switch" onclick="toggleDragMode()">Disable drag mode</button>
<canvas id="canvas"></canvas>
</div>
<script>
var timeFormat = 'MM/DD/YYYY HH:mm';
var now = window.moment();
var dragOptions = {
animationDuration: 1000
};
function randomScalingFactor() {
return Math.round(Math.random() * 100 * (Math.random() > 0.5 ? -1 : 1));
}
function randomColorFactor() {
return Math.round(Math.random() * 255);
}
function randomColor(opacity) {
return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
}
function newDate(days) {
return now.clone().add(days, 'd').toDate();
}
function newDateString(days) {
return now.clone().add(days, 'd').format(timeFormat);
}
var config = {
type: 'line',
data: {
labels: [newDate(0), newDate(1), newDate(2), newDate(3), newDate(4), newDate(5), newDate(6)], // Date Objects
datasets: [{
label: 'My First dataset',
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
fill: false,
borderDash: [5, 5],
}, {
label: 'My Second dataset',
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
}, {
label: 'Dataset with point data',
data: [{
x: newDateString(0),
y: randomScalingFactor()
}, {
x: newDateString(5),
y: randomScalingFactor()
}, {
x: newDateString(7),
y: randomScalingFactor()
}, {
x: newDateString(15),
y: randomScalingFactor()
}],
fill: false
}]
},
options: {
responsive: true,
title: {
display: true,
text: 'Chart.js Time Scale'
},
scales: {
x: {
type: 'time',
time: {
parser: timeFormat,
// round: 'day'
tooltipFormat: 'll HH:mm'
},
scaleLabel: {
display: true,
labelString: 'Date'
},
ticks: {
maxRotation: 0
}
},
y: {
scaleLabel: {
display: true,
labelString: 'value'
}
}
},
plugins: {
zoom: {
zoom: {
enabled: true,
drag: dragOptions,
mode: 'x',
speed: 0.05
}
}
}
}
};
config.data.datasets.forEach(function(dataset) {
dataset.borderColor = randomColor(0.4);
dataset.backgroundColor = randomColor(0.5);
dataset.pointBorderColor = randomColor(0.7);
dataset.pointBackgroundColor = randomColor(0.5);
dataset.pointBorderWidth = 1;
});
window.resetZoom = function() {
window.myLine.resetZoom();
};
window.toggleDragMode = function() {
var chart = window.myLine;
var zoomOptions = chart.options.plugins.zoom.zoom;
zoomOptions.drag = zoomOptions.drag ? false : dragOptions;
chart.update();
document.getElementById('drag-switch').innerText = zoomOptions.drag ? 'Disable drag mode' : 'Enable drag mode';
};
window.onload = function() {
var ctx = document.getElementById('canvas').getContext('2d');
window.myLine = new window.Chart(ctx, config);
};
</script>
</body>
</html>