演示几个地图事件:
1. 点击标记缩放地图
仍然使用上一遍文章使用的英国伦敦的地图。点用户点击标记时实现缩放地图的功能(点击标记时绑定地图缩放事件)。
代码如下：
<html>
<head>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyDY0kkJiTPVd2U7aTOAwhc9ySH6oHxOIYM&sensor=false">
</script>
<script>
var myCenter=new google.maps.LatLng(51.508742,-0.120850);
function initialize()
{
var mapProp = {
center: myCenter,
zoom:5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("googleMap"),mapProp);
var marker = new google.maps.Marker({
position: myCenter,
title:‘Click to zoom‘
});
marker.setMap(map);
// Zoom to 9 when clicking on marker
google.maps.event.addListener(marker,‘click‘,function() {
map.setZoom(9);
map.setCenter(marker.getPosition());
});
}
google.maps.event.addDomListener(window, ‘load‘, initialize);
</script>
</head>
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>
使用 addListener() 事件处理程序来注册事件的监听。该方法使用一个对象，一个事件来监听，当指定的事件发生时 函数将被调用。
2. 重置标记
通过给地图添加事件处理程序来改变 ‘center‘ 属性，以下代码使用 center_changed 事件在3秒后标记自动移到中心点,代码如下：
<html>
<head>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyDY0kkJiTPVd2U7aTOAwhc9ySH6oHxOIYM&sensor=false">
</script>
<script>
var myCenter=new google.maps.LatLng(51.508742,-0.120850);
function initialize()
{
var mapProp = {
center: myCenter,
zoom:5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("googleMap"),mapProp);
var marker = new google.maps.Marker({
position: myCenter,
title:‘Click to zoom‘
});
marker.setMap(map);
// Zoom to 9 when clicking on marker
google.maps.event.addListener(marker,‘click‘,function() {
map.setZoom(9);
map.setCenter(marker.getPosition());
});
google.maps.event.addListener(map,‘center_changed‘,function() {
// 3 seconds after the center of the map has changed, pan back to the marker
window.setTimeout(function() {
map.panTo(marker.getPosition());
},3000);
});
}
google.maps.event.addDomListener(window, ‘load‘, initialize);
</script>
</head>
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>
3. 点击标记时打开信息窗口。
点击标记在信息窗口显示一些文本信息，代码如下:
<html>
<head>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyDY0kkJiTPVd2U7aTOAwhc9ySH6oHxOIYM&sensor=false">
</script>
<script>
var myCenter=new google.maps.LatLng(51.508742,-0.120850);
function initialize()
{
var mapProp = {
center:myCenter,
zoom:5,
mapTypeId:google.maps.MapTypeId.ROADMAP
};
var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
var marker=new google.maps.Marker({
position:myCenter,
});
marker.setMap(map);
var infowindow = new google.maps.InfoWindow({
content:"Hello World!"
});
google.maps.event.addListener(marker, ‘click‘, function() {
infowindow.open(map,marker);
});
}
google.maps.event.addDomListener(window, ‘load‘, initialize);
</script>
</head>
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>
4. 设置标记及打开每个标记的信息窗口
当用户点击地图时执行一个窗口,用户点击地图某个位置时,在指定位置上放置一个标记，并弹出信息窗口,代码如下所示：
<html>
<head>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyDY0kkJiTPVd2U7aTOAwhc9ySH6oHxOIYM&sensor=false">
</script>
<script>
var map;
var myCenter=new google.maps.LatLng(51.508742,-0.120850);
function initialize()
{
var mapProp = {
center:myCenter,
zoom:5,
mapTypeId:google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("googleMap"),mapProp);
google.maps.event.addListener(map, ‘click‘, function(event) {
placeMarker(event.latLng);
});
}
function placeMarker(location) {
var marker = new google.maps.Marker({
position: location,
map: map,
});
var infowindow = new google.maps.InfoWindow({
content: ‘Latitude: ‘ + location.lat() + ‘<br>Longitude: ‘ + location.lng()
});
infowindow.open(map,marker);
}
google.maps.event.addDomListener(window, ‘load‘, initialize);
</script>
</head>
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>
时间： 2024-12-11 18:10:22