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index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>JSensor Test</title>
<link href="/assets/css/bootstrap.min.css" rel="stylesheet">
<title>JavaScript Sensor Web Test</title>
<style>
#demo-div {color: lightgrey; border-radius: 0.3rem;}
#demo-div span, #demo-div #num-observed-events {color: black;}
h1 {margin-top: 0.5rem;}
h4 {margin-top: 0.66rem; font-size:1.33rem;}
#demo-div li {line-height: 21px;}
#demo-div ul {margin-bottom: 0.66rem;}
</style>
</head>
<body>
<main role="main" class="container">
<h1 align="left">JavaScript Sensor Access Test</h1>
<p><b>This test page should be run from a mobile phone.</b></p>
<div class="p-3 mb-2 bg-secondary" id="demo-div">
<a id="start_demo" class="btn btn-lg btn-success py-1" href="#" role="button">Start the demo</a>
<p style="margin-top:1rem;">Num. of datapoints: <span class="badge badge-warning" id="num-observed-events">0</span></p>
<h4 style="margin-top:0.75rem;">Orientation</h4>
<ul>
<li>X-axis (β): <span id="Orientation_b">0</span><span>°</span></li>
<li>Y-axis (γ): <span id="Orientation_g">0</span><span>°</span></li>
<li>Z-axis (α): <span id="Orientation_a">0</span><span>°</span></li>
</ul>
<h4>Accelerometer</h4>
<ul>
<li>X-axis: <span id="Accelerometer_x">0</span><span> m/s<sup>2</sup></span></li>
<li>Y-axis: <span id="Accelerometer_y">0</span><span> m/s<sup>2</sup></span></li>
<li>Z-axis: <span id="Accelerometer_z">0</span><span> m/s<sup>2</sup></span></li>
<li>Data Interval: <span id="Accelerometer_i">0</span><span> ms</span></li>
</ul>
<h4>Accelerometer including gravity</h4>
<ul>
<li>X-axis: <span id="Accelerometer_gx">0</span><span> m/s<sup>2</sup></span></li>
<li>Y-axis: <span id="Accelerometer_gy">0</span><span> m/s<sup>2</sup></span></li>
<li>Z-axis: <span id="Accelerometer_gz">0</span><span> m/s<sup>2</sup></span></li>
</ul>
<h4>Gyroscope</h4>
<ul>
<li>X-axis: <span id="Gyroscope_x">0</span><span>°/s</span></li>
<li>Y-axis: <span id="Gyroscope_y">0</span><span>°/s</span></li>
<li>Z-axis: <span id="Gyroscope_z">0</span><span>°/s</span></li>
</ul>
</div>
</main>
<footer class="footer">
</footer>
<script>
function handleOrientation(event) {
updateFieldIfNotNull('Orientation_a', event.alpha);
updateFieldIfNotNull('Orientation_b', event.beta);
updateFieldIfNotNull('Orientation_g', event.gamma);
incrementEventCount();
}
function incrementEventCount(){
let counterElement = document.getElementById("num-observed-events")
let eventCount = parseInt(counterElement.innerHTML)
counterElement.innerHTML = eventCount + 1;
}
function updateFieldIfNotNull(fieldName, value, precision=10){
if (value != null)
document.getElementById(fieldName).innerHTML = value.toFixed(precision);
}
function handleMotion(event) {
updateFieldIfNotNull('Accelerometer_gx', event.accelerationIncludingGravity.x);
updateFieldIfNotNull('Accelerometer_gy', event.accelerationIncludingGravity.y);
updateFieldIfNotNull('Accelerometer_gz', event.accelerationIncludingGravity.z);
updateFieldIfNotNull('Accelerometer_x', event.acceleration.x);
updateFieldIfNotNull('Accelerometer_y', event.acceleration.y);
updateFieldIfNotNull('Accelerometer_z', event.acceleration.z);
updateFieldIfNotNull('Accelerometer_i', event.interval, 2);
updateFieldIfNotNull('Gyroscope_z', event.rotationRate.alpha);
updateFieldIfNotNull('Gyroscope_x', event.rotationRate.beta);
updateFieldIfNotNull('Gyroscope_y', event.rotationRate.gamma);
incrementEventCount();
}
let is_running = false;
let demo_button = document.getElementById("start_demo");
demo_button.onclick = function(e) {
e.preventDefault();
// Request permission for iOS 13+ devices
if (
DeviceMotionEvent &&
typeof DeviceMotionEvent.requestPermission === "function"
) {
DeviceMotionEvent.requestPermission();
}
if (is_running){
window.removeEventListener("devicemotion", handleMotion);
window.removeEventListener("deviceorientation", handleOrientation);
demo_button.innerHTML = "Start demo";
demo_button.classList.add('btn-success');
demo_button.classList.remove('btn-danger');
is_running = false;
}else{
window.addEventListener("devicemotion", handleMotion);
window.addEventListener("deviceorientation", handleOrientation);
document.getElementById("start_demo").innerHTML = "Stop demo";
demo_button.classList.remove('btn-success');
demo_button.classList.add('btn-danger');
is_running = true;
}
};
/*
Light and proximity are not supported anymore by mainstream browsers.
window.addEventListener('devicelight', function(e) {
document.getElementById("DeviceLight").innerHTML="AmbientLight current Value: "+e.value+" Max: "+e.max+" Min: "+e.min;
});
window.addEventListener('lightlevel', function(e) {
document.getElementById("Lightlevel").innerHTML="Light level: "+e.value;
});
window.addEventListener('deviceproximity', function(e) {
document.getElementById("DeviceProximity").innerHTML="DeviceProximity current Value: "+e.value+" Max: "+e.max+" Min: "+e.min;
});
window.addEventListener('userproximity', function(event) {
document.getElementById("UserProximity").innerHTML="UserProximity: "+event.near;
});
*/
</script>
</body>
</html>