ユーザーの緯度と経度を提供するページを作成し、ユーザーがボタンをクリックして、ピン (現在の場所を示す) を中心に Google マップを配置できるようにする必要があります。これを行う方法について完全に混乱しています。関数になると思います。コードで関数を宣言しましたが、これを実行する方法がわかりません。どんな助けでも大歓迎です。ありがとうございました!
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<!-- This page will allow the suer to track their location through means of the HTML5 Geolocation feature -->
<title>Assignment 4:Track My Location</title>
<meta name="author" content="Alan Sylvestre" />
<script src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script>
function myLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(locationReveal);
} else {
alert("Please use a different browser that supports geolocation.");
}
}
window.onload = myLocation;
function locationReveal(position) {
showMap(position.coords);
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
var div = document.getElementById("location");
div.innerHTML = "You are at Latitude: " + latitude + ", Longitude: " + longitude;
}
var map;
function showMap(coords) {
var googleLatAndLong = new google.maps.LatLng(coords.latitude, coords.longitude);
var mapOptions = {
zoom : 18,
center : googleLatAndLong,
mapTypeId : google.maps.MapTypeId.SATELLITE
};
var mapDiv = document.getElementById("map");
map = new google.maps.Map(mapDiv, mapOptions);
addMarker(googleLatAndLong);
}
google.maps.Map(mapDiv, mapOptions);
var marker;
function addMarker(latlong) {
var markerOptions = {
position : latlong,
map : map
};
marker = new google.maps.Marker(markerOptions);
}
var center;
function calculateCenter() {
center = map.getCenter();
}
</script>
</head>
<body style="background-color:yellow;" text="blue;">
<div align="center">
<h1>Reveal My Location</h1>
<p>
You know what's pretty cool? Tracking your location using a simple internet connection. By clicking this button, you're browser will track a global database and reveal your location in terms of latitude and longitude. Enjoy!
</p>
<div id="location"></div>
<br>
<div id="map" style="width:400px; height:400px;"></div>
<br>
<input type="button" id="centerOfMap" value="Center" onclick="calculateCenter()">
<footer>
<p>
© Copyright by Alan Sylvestre
</p>
</footer>
</div>
</body>