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S05: Create stock chart with custom annotations #14

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29 changes: 24 additions & 5 deletions highcharts-api/highcharts-stock/05-annotations/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2,16 +2,35 @@

<head>

<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1">

<script src="https://code.highcharts.com/stock/highstock.js"></script>
<link rel="stylesheet" type="text/css" href="https://code.highcharts.com/css/annotations/popup.css">

<script src="https://code.highcharts.com/stock/highstock.js"></script>
<script src="https://code.highcharts.com/modules/annotations-advanced.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>

</head>

<body>
<div id="container"></div>
<div id="container"></div>
<div id="controls">
<label for="x1">x1:</label>
<input type="date" id="x1" class="x-input">

<label for="y1">y1:</label>
<input type="number" id="y1" class="y-input">

<label for="x2">x2:</label>
<input type="date" id="x2" class="x-input">

<label for="y2">y2:</label>
<input type="number" id="y2" class="y-input">

<button type="button" class="add-line">Add line</button>
</div>
</body>

<script src="main.js"></script>
95 changes: 74 additions & 21 deletions highcharts-api/highcharts-stock/05-annotations/main.js
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Original file line number Diff line number Diff line change
@@ -1,23 +1,76 @@
(async () => {
const data = await fetch(
'https://demo-live-data.highcharts.com/aapl-c.json'
).then((response) => response.json());

Highcharts.stockChart('container', {
rangeSelector: {
selected: 1
},

title: {
text: ''
},

series: [
{
name: 'AAPL',
data: data,
type: 'spline'
}
]
});
const data = await fetch(
'https://demo-live-data.highcharts.com/aapl-c.json'
).then((response) => response.json());

Highcharts.stockChart('container', {
chart: {
events: {
load() {
const chart = this;
const extremesX = chart.xAxis[0].getExtremes();
const extremesY = chart.yAxis[0].getExtremes();

const controls = document.getElementById('controls'),
inputsX = controls.querySelectorAll('.x-input'),
inputsY = controls.querySelectorAll('.y-input'),
addLineBtn = controls.querySelector('.add-line');

addLineBtn.addEventListener('click', function() {
const x1 = dateStrToTimestamp(inputsX[0].value),
y1 = Number(inputsY[0].value),
x2 = dateStrToTimestamp(inputsX[1].value),
y2 = Number(inputsY[1].value);

chart.addAnnotation({
type: 'crookedLine',
typeOptions: {
points: [
{ x: x1, y: y1 },
{ x: x2, y: y2 }
]
}
});
});

inputsX.forEach(inputX => {
inputX.min = timestampToDateStr(extremesX.min);
inputX.max = timestampToDateStr(extremesX.max);
});

inputsY.forEach(inputY => {
inputY.min = extremesY.min;
inputY.max = extremesY.max;

inputY.addEventListener('change', function() {
const value = this.value;
if (value < this.min) this.value = this.min;
if (value > this.max) this.value = this.max;
});
});
}
}
},
rangeSelector: {
selected: 1
},
title: {
text: ''
},
series: [
{
name: 'AAPL',
data: data,
type: 'spline'
}
]
});
})();

function timestampToDateStr(timestamp) {
return new Date(timestamp).toISOString().split('T')[0];
}

function dateStrToTimestamp(value) {
return new Date(value).getTime();
}