【发布时间】：2018-01-13 14:23:28
【问题描述】：
我尝试检查给定的 poiont 是否在 Rectangle 内部或外部，如果在内部则返回 true，或者如果在外部则返回 false，并且我想将输出写入 textBox。 我有我的代码 map.html
<!DOCTYPE html>
<html>
<head>
<title>Simple Map</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#floating-panel {
position: absolute;
top: 4px;
left: 9%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 10px;
}
</style>
</head>
<body>
<div id="floating-panel">
<input id="address" type="textbox" value="enter address">
<input id="submit" type="button" value="Geocode">
<input id="output" type="textbox" value="output">
</div>
<div id="map"></div>
<script>
var map;
//-----This example adds a user-editable rectangle to the map.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 45.065140, lng: 19.946804},
zoom: 12
});
/*------for geocoding(I give addres not lng lang)*/
var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
geocodeAddress(geocoder, map);
});
/* ------------- */
var bounds = {
north: 45.095140,
south: 45.025140,
east: 19.966804,
west: 19.926804
};
// Define a rectangle and set its editable property to true.
var rectangle = new google.maps.Rectangle({
bounds: bounds,
editable: true,
draggable: true,
geodesic: true
});
rectangle.setMap(map);
document.getElementById("output").value = check_is_in_or_out(marker);
}
function check_is_in_or_out(marker){
google.maps.event.addListener(map, 'bounds_changed', function() {
var bounds = map.getBounds().contains(marker.getPosition());
});
return bounds;
}
/* ------------- */
/*------for geocoding(I give addres not lng lang)*/
var address;
var latitude;
var longitude;
var marker;
function geocodeAddress(geocoder, resultsMap) {
address = document.getElementById('address').value;
geocoder.geocode({'address': address}, function(results, status) {
if (status === 'OK') {
resultsMap.setCenter(results[0].geometry.location);
latitude = results[0].geometry.location.lat();
longitude = results[0].geometry.location.lng();
marker = new google.maps.Marker({
map: resultsMap,
position: results[0].geometry.location
});
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
return marker;
});
}
/* ------------- */
</script>
<script src="http://maps.googleapis.com/maps/api/js?key=API_KEY&callback=initMap"
async defer></script>
</body>
</html>
如果给定点在内部，我想进入我的输出true，如果在外部，我想得到false
那么，我该怎么做呢？不，当我使用时没有发生任何事情：document.getElementById("output").value = check_is_in_or_out(marker);
*API_KEY 如果您没有 API KEY，请改用：http://maps.google.com/maps/api/js?sensor=false
编辑 感谢 geocodezip 的帮助。现在我的代码是：
<!DOCTYPE html>
<html>
<head>
<title>Map2</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#floating-panel {
position: absolute;
top: 4px;
left: 9%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 10px;
}
</style>
</head>
<body>
<div id="floating-panel">
<input id="address" type="textbox" value="Dobrodol">
<input id="submit" type="button" value="Geocode">
<input id="output" type="textbox" value="output">
</div>
<div id="map"></div>
<script>
function check_is_in_or_out(marker) {
var insideRectangle = false;
if (rectangle && rectangle.getBounds && marker && marker.getPosition())
insideRectangle = rectangle.getBounds().contains(marker.getPosition());
return insideRectangle;
}
var map;
var rectangle;
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {
lat: 45.065140,
lng: 19.946804
},
zoom: 12
});
var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
geocodeAddress(geocoder, map);
});
var bounds = {
north: 45.095140,
south: 45.025140,
east: 19.966804,
west: 19.926804
};
// Define a rectangle and set its editable property to true.
rectangle = new google.maps.Rectangle({
bounds: bounds,
editable: true,
draggable: true,
geodesic: true
});
rectangle.setMap(map);
}
var address;
var latitude;
var longitude;
var marker;
function geocodeAddress(geocoder, resultsMap) {
address = document.getElementById('address').value;
geocoder.geocode({
'address': address
}, function(results, status) {
if (status === 'OK') {
resultsMap.setCenter(results[0].geometry.location);
latitude = results[0].geometry.location.lat();
longitude = results[0].geometry.location.lng();
marker = new google.maps.Marker({
map: resultsMap,
position: results[0].geometry.location
});
document.getElementById("output").value = check_is_in_or_out(marker);
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
</script>
<script src="http://maps.googleapis.com/maps/api/js?key=API_KEY&callback=initMap"
async defer></script>
</body>
</html>
在geocodeAddress(geocoder, resultsMap) 中很好，我们使用document.getElementById("output").value = check_is_in_or_out(marker); 并且我的文本框更改为真或假。但是我怎样才能将这个值设置为 var？像这样的东西： var bool = check_is_in_or_out(marker);在 bool 中我会有真假？
我尝试在 geocodeAddress 中使用 return 但我的变量未定义，所以在我看来我只能在内部函数 geocoder.geocode 中执行此操作，但我希望这个变量是全局的而不是本地的。
【问题讨论】：
标签： javascript html google-maps