Google地图infowindow位置 [英] Google map infowindow position
问题描述
以下是包含三个多边形的示例谷歌地图。我将每个多边形的infowindow设置为,
for(var i坐标){
arr = [] ;
for(var j = 0; j< coordinates [i] .length; j ++){
arr.push(new google.maps.LatLng(
parseFloat(coordinates
parseFloat(coordinates [i] [j] [1])$ b $ b));
bounds.extend(arr [arr.length-1])$ b $ b}
//构造多边形。
polygons.push(new google.maps.Polygon({
paths:arr,
strokeColor:'#FF0000',
strokeOpacity:0.8,
strokeWeight:2 ,
fillColor:'#FF0000',
fillOpacity:0.35
}));
polygons [polygons.length-1] .setMap(map);
var infowindow = new google.maps.InfoWindow({
content:Hello World!
});
google.maps.event.addListener(polygons.length-1],'click',function(event){
infowindow.open(map);
infoWindow .setPosition(event.latLng);
});
}
但infowindow显示在左上角位置。如何在单击多边形的中心设置它?
两个问题:
-
您的点击侦听器代码中存在拼写错误,javascript区分大小写,
infowindow
和infoWindow
是不同的对象,所以你没有正确设置infowindow的位置。
infowindow 。开(地图);
infoWindow.setPosition(event.latLng);
-
您目前将infowindow放置在点击
infoWindow.setPosition(event.latLng);
。
如果你想让infowindow进入多边形边界的中心,你需要把它放在那里:
代码段:
var map,infoWindow; var infoWindow = new google.maps.InfoWindow({content:Hello World!}); function initialize(){var mapOptions = {zoom:5,center:new google .maps.LatLng(24.886436490787712,-70.2685546875),mapTypeId:google.maps.MapTypeId.TERRAIN}; var bounds = new google.maps.LatLngBounds(); var polygons = []; var arr = new Array(); var map = new google.maps.Map(document.getElementById('map-canvas'),mapOptions); for(var i in coordinates){arr = []; var polyBounds = new google.maps.LatLngBounds(); (var j = 0; j< coordinate [i] .length; j ++){arr.push(new google.maps.LatLng(parseFloat(coordinates [i] [j] [0]),parseFloat(coordinates [i ] [j] [1]))); bounds.extend(arr [arr.length - 1]); polyBounds.extend(arr [arr.length - 1]); } var IWpoint = polyBounds.getCenter(); //构造多边形。 polygons.push(new google.maps.Polygon({paths:arr,strokeColor:'#FF0000',strokeOpacity:0.8,strokeWeight:2,fillColor:'#FF0000',fillOpacity:0.35,IWpoint:IWpoint})); polygons [polygons.length - 1] .setMap(map); var centerMark = new google.maps.Marker({map:map,position:IWpoint,icon:{url:https://maps.gstatic.com/intl/en_us/mapfiles/markers2/measle.png,anchor: new google.maps.Point(3.5,3.5),size:new google.maps.Size(7,7)},title:polygon+ i}); google.maps.event.addListener(polygons [polygons.length - 1],'click',function(event){infoWindow.setPosition(this.IWpoint); infoWindow.open(map);}); }定义多边形路径的LatLng坐标。coordinates = {feed1:[[25.774252, - 80.190262],[18.466465,-66.118292],[32.321384,-64.75737],[25.774252,-80.190262]],feed2:[[26.774252,-81.190262],[19.466465,-67.118292],[33.321384,-65.75737] ,[26.774252,-81.190262]],feed3:[[27.774252,-82.190262],[20.466465,-68.118292],[34.321384,-66.75737],[27.774252,-82.190262]]};
html,body,#map-canvas {height:100%; margin:0px;
< script src =https:// //maps.googleapis.com/maps/api/js\">< / script>< div;><如果你想把它放在多边形的质心上,你需要计算它并把它放在那里:
//从http://stackoverflow.com/questions/9692448/how-can-you-find-the-centroid-of -a-concave-irregular-polygon-in-javascript
function get_polygon_centroid(pts){
var first = pts [0],last = pts [pts.length-1]; (first.lat()!= last.lat()|| first.lng()!= last.lng())pts.push(first);
if(first.lat
var twicearea = 0,
x = 0,y = 0,
nPts = pts.length,
p1,p2,f; (var i = 0,j = nPts-1; i< nPts; j = i ++){
p1 = pts [i]; p2 = pts [j];
f = p1.lat()* p2.lng() - p2.lat()* p1.lng();
两次地区+ = f;
x + =(p1.lng()+ p2.lng())* f;
y + =(p1.lat()+ p2.lat())* f;
}
f =两次地区* 3;
返回新的google.maps.LatLng(y / f,x / f);
}
Here is a sample google map with three polygons. I am setting the infowindow for each polygon as,
for (var i in coordinates) {
arr = [];
for (var j=0; j < coordinates[i].length; j++) {
arr.push( new google.maps.LatLng(
parseFloat(coordinates[i][j][0]),
parseFloat(coordinates[i][j][1])
));
bounds.extend(arr[arr.length-1])
}
// Construct the polygon.
polygons.push(new google.maps.Polygon({
paths: arr,
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35
}));
polygons[polygons.length-1].setMap(map);
var infowindow = new google.maps.InfoWindow({
content:"Hello World!"
});
google.maps.event.addListener(polygons[polygons.length-1], 'click', function(event) {
infowindow.open(map);
infoWindow.setPosition(event.latLng);
});
}
But the infowindow is showing at the top left position. How can I set it on the center of clicked polygon?
Two issues:
There is a typo in your click listener code, javascript is case sensitive,
infowindow
andinfoWindow
are different objects, so you are not setting the position of the infowindow correctly.infowindow.open(map); infoWindow.setPosition(event.latLng);
You are currently placing the infowindow at the place that is clicked
infoWindow.setPosition(event.latLng);
.
If you want the infowindow in the center of the bounds of the polygon, you need to place it there:
code snippet:
var map, infoWindow;
var infoWindow = new google.maps.InfoWindow({
content: "Hello World!"
});
function initialize() {
var mapOptions = {
zoom: 5,
center: new google.maps.LatLng(24.886436490787712, -70.2685546875),
mapTypeId: google.maps.MapTypeId.TERRAIN
};
var bounds = new google.maps.LatLngBounds();
var polygons = [];
var arr = new Array();
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
for (var i in coordinates) {
arr = [];
var polyBounds = new google.maps.LatLngBounds();
for (var j = 0; j < coordinates[i].length; j++) {
arr.push(new google.maps.LatLng(
parseFloat(coordinates[i][j][0]),
parseFloat(coordinates[i][j][1])));
bounds.extend(arr[arr.length - 1]);
polyBounds.extend(arr[arr.length - 1]);
}
var IWpoint = polyBounds.getCenter();
// Construct the polygon.
polygons.push(new google.maps.Polygon({
paths: arr,
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
IWpoint: IWpoint
}));
polygons[polygons.length - 1].setMap(map);
var centerMark = new google.maps.Marker({
map: map,
position: IWpoint,
icon: {
url: "https://maps.gstatic.com/intl/en_us/mapfiles/markers2/measle.png",
anchor: new google.maps.Point(3.5, 3.5),
size: new google.maps.Size(7, 7)
},
title: "polygon " + i
});
google.maps.event.addListener(polygons[polygons.length - 1], 'click', function(event) {
infoWindow.setPosition(this.IWpoint);
infoWindow.open(map);
});
}
map.fitBounds(bounds);
}
google.maps.event.addDomListener(window, 'load', initialize);
// Define the LatLng coordinates for the polygon's path.
var coordinates = {
"feed1": [
[25.774252, -80.190262],
[18.466465, -66.118292],
[32.321384, -64.75737],
[25.774252, -80.190262]
],
"feed2": [
[26.774252, -81.190262],
[19.466465, -67.118292],
[33.321384, -65.75737],
[26.774252, -81.190262]
],
"feed3": [
[27.774252, -82.190262],
[20.466465, -68.118292],
[34.321384, -66.75737],
[27.774252, -82.190262]
]
};
html,
body,
#map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map-canvas"></div>
If you want to place it at the polygons "centroid", you need to compute that and place it there:
// from http://stackoverflow.com/questions/9692448/how-can-you-find-the-centroid-of-a-concave-irregular-polygon-in-javascript
function get_polygon_centroid(pts) {
var first = pts[0], last = pts[pts.length-1];
if (first.lat() != last.lat() || first.lng() != last.lng()) pts.push(first);
var twicearea=0,
x=0, y=0,
nPts = pts.length,
p1, p2, f;
for ( var i=0, j=nPts-1 ; i<nPts ; j=i++ ) {
p1 = pts[i]; p2 = pts[j];
f = p1.lat()*p2.lng() - p2.lat()*p1.lng();
twicearea += f;
x += ( p1.lng() + p2.lng() ) * f;
y += ( p1.lat() + p2.lat() ) * f;
}
f = twicearea * 3;
return new google.maps.LatLng(y/f, x/f);
}
这篇关于Google地图infowindow位置的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!