Samples/Events/Map View Events/Map View Events.html

﻿<!DOCTYPE html>
<html lang="en">
<head>
    <title>Map View Events - Bing Maps Samples</title>

    <meta charset="utf-8" />
	<link rel="shortcut icon" href="/favicon.ico"/>
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
    <meta name="description" content="The following code sample demonstrates how to add an maps events handler." />
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, Bing, Bing Maps" />
    <meta name="author" content="Microsoft Bing Maps" />
    <meta name="screenshot" content="screenshot.jpg" />
    
    <script>
    var map;

    function GetMap()
    {
        map = new Microsoft.Maps.Map('#myMap', {});

        Microsoft.Maps.Events.addHandler(map, 'viewchangestart', function (e) {
            displayEventInfo('viewchangestart', e);
        });

        Microsoft.Maps.Events.addHandler(map, 'viewchange', function (e) {
            displayEventInfo('viewchange', e);
        });

        Microsoft.Maps.Events.addHandler(map, 'viewchangeend', function (e) {
            displayEventInfo('viewchangeend', e);
        });
    }

    function displayEventInfo(eventName, event) {
        var output = document.getElementById('output');

        output.innerHTML = eventName + ': ';

        if (typeof event.cause === 'undefined') {
            output.innerHTML += 'Likely caused by user';
        } else {
            if (event.cause === 1) {
                output.innerHTML += 'Caused by user';
            } else if (event.cause === 0) {
                output.innerHTML += 'Caused by set view';
            }
        }
    }
    </script>
    
</head>
<body>
    <div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;background-color:gray"></div><br />
    <input type="button" value="test" onclick="map.setView({zoom:2})" /><br/><br/>
    <div id="output"></div>

    <script>
        // Dynamic load the Bing Maps Key and Script
        // Get your own Bing Maps key at https://www.microsoft.com/maps
        (async () => {
            let script = document.createElement("script");
            let bingKey = await fetch("https://samples.azuremaps.com/api/GetBingMapsKey").then(r => r.text()).then(key => { return key });
            script.setAttribute("src", `https://www.bing.com/api/maps/mapcontrol?callback=GetMap&key=${bingKey}`);
            document.body.appendChild(script);
        })();
    </script>
</body>
</html>