谷歌地图得到半径 [英] google maps get radius
问题描述
我对这个google maps javascript代码有一个愚蠢的困难时期。我想获得在Google地图上生成的圆的半径的返回值。谷歌API提供的代码，但我不知道该把它放在哪里。我到处试过。这是下面的代码。我做错了什么？
I'm having a stupid hard time with this google maps javascript code. I want to get the return of the radius of a circle that is produced on google maps. Google API offers the code but I have no idea where to put it. I've tried everywhere. Here is the code below. What did I do wrong?
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 50% }
</style>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?key=mykey&sensor=false&libraries=drawing">
</script>
<script>
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(33.65, -84.42),
zoom: 7,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var drawingManager = new google.maps.drawing.DrawingManager({
drawingMode: google.maps.drawing.OverlayType.MARKER,
drawingControl: true,
drawingControlOptions: {
position: google.maps.ControlPosition.TOP_CENTER,
drawingModes: [
google.maps.drawing.OverlayType.CIRCLE
]
},
circleOptions: {
fillColor: '#01939A',
fillOpacity: .4,
strokeWeight: 5,
clickable: false,
editable: true,
zIndex: 1
}
});
drawingManager.setMap(map);
}
google.maps.event.addDomListener(window, 'load',
initialize).addListener(drawingManager, 'circlecomplete', function(circle)
{
var radius = circle.getRadius();
});
</script>
</head>
<body>
<script type="text/javascript" >
alert(radius);
</script>
<div id="map_canvas"></div>
</body>
</html>
推荐答案
您似乎在这里遇到了一些流程问题。尝试使用由initialize函数绑定的drawingManager变量。
You seem to have a few flow problems here. Trying to use the drawingManager variable, which is bound by the initialize function.
这里： http://jsfiddle.net/RN3QL/ - 我已经将circle complete函数的绑定移动到初始化函数中，并缝合了一些较小的流量问题。
Here: http://jsfiddle.net/RN3QL/ - I've moved the binding of the circle complete function to within the initialize function, and stitched up a few smaller flow issues.
这篇关于谷歌地图得到半径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！
