Javascript GoogleMapsV3:需要多个可拖动的标记来更新HTML输入字段
我正在使用GoogleMapsV3开发一个项目,它允许用户拖放随机放置的标记(数量、坐标和用php生成的标签) 我想移动标记的纬度和经度来更新页面上的html输入字段。 不幸的是,我对js了解不够,无法通过使用数组和/或“变量”以有效的方式为每个标记赋予唯一的标识 以下是我迄今为止的代码:Javascript GoogleMapsV3:需要多个可拖动的标记来更新HTML输入字段,javascript,google-maps,google-maps-api-3,google-maps-markers,Javascript,Google Maps,Google Maps Api 3,Google Maps Markers,我正在使用GoogleMapsV3开发一个项目,它允许用户拖放随机放置的标记(数量、坐标和用php生成的标签) 我想移动标记的纬度和经度来更新页面上的html输入字段。 不幸的是,我对js了解不够,无法通过使用数组和/或“变量”以有效的方式为每个标记赋予唯一的标识 以下是我迄今为止的代码: <!DOCTYPE html> <html> <head> <meta name="viewport" content="initial-scale=1.0, use
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 100% }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript">
function initialize()
{
var latlng = new google.maps.LatLng(39.3939,-119.861);
var myOptions =
{
zoom: 17,
center: latlng,
mapTypeId: google.maps.MapTypeId.SATELLITE
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
// Set Border Coords
var BorderCoords =
[
new google.maps.LatLng(39.3952726888,-119.85922848),
new google.maps.LatLng(39.3925273112,-119.85922848),
new google.maps.LatLng(39.3925273112,-119.86277152),
new google.maps.LatLng(39.3952726888,-119.86277152)
];
// Define Border
Border = new google.maps.Polygon
({
map: map,
paths: BorderCoords,
strokeColor: "#FF0000",
strokeOpacity: 0.8,
strokeWeight: 2
});
// Set marker coords
var MarkerCoords =
[
[39.3930761,-119.8612324],
[39.3947606,-119.8617452],
[39.3948516,-119.8619689],
[39.3929412,-119.859542],
[39.3947902,-119.8601571],
[39.3940501,-119.8593369]
];
// Set marker properties
var MarkerProp =
[
["Red","A"],
["Red","B"],
["Red","C"],
["Blue","A"],
["Blue","B"],
["Blue","C"]
];
// Define marker coords
for (var i = 0; i < MarkerCoords.length; i++)
{
var markers = new google.maps.Marker
({
map: map,
position: new google.maps.LatLng(MarkerCoords[i][0],MarkerCoords[i][1]),
clickable: true,
draggable: true,
icon: 'img/icons/'+MarkerProp[i][0]+'/letter_'+MarkerProp[i][1]+'.png'
});
google.maps.event.addListener(markers, "dragend", function()
{
//These variables will not work
//var latstr = eval('lat_'+MarkerProp[i][0]+'_'+MarkerProp[i][1]);
//var lngstr = eval('lng_'+MarkerProp[i][0]+'_'+MarkerProp[i][1]);
//var lat = document.getElementById(latstr);
//var lng = document.getElementById(lngstr);
//these lat/lng variables work for only one set of input fields
var lat = document.getElementById('lat_Blue_C');
var lng = document.getElementById('lng_Blue_C');
var coords = this.getPosition()
lat.value = coords.lat();
lng.value = coords.lng();
});
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:700px; height:400px"></div>
<br/>
<input id="lat_Red_A" type="text">
<input id="lng_Red_A" type="text">
<br/>
<input id="lat_Red_B" type="text">
<input id="lng_Red_B" type="text">
<br/>
<input id="lat_Red_C" type="text">
<input id="lng_Red_C" type="text">
<br/>
<input id="lat_Blue_A" type="text">
<input id="lng_Blue_A" type="text">
<br/>
<input id="lat_Blue_B" type="text">
<input id="lng_Blue_B" type="text">
<br/>
<input id="lat_Blue_C" type="text">
<input id="lng_Blue_C" type="text">
<br/>
</body>
</html>
html{高度:100%}
正文{高度:100%;边距:0px;填充:0px}
#地图画布{高度:100%}
函数初始化()
{
var-latlng=newgoogle.maps.latlng(39.3939,-119.861);
变量myOptions=
{
缩放:17,
中心:拉特林,
mapTypeId:google.maps.mapTypeId.SATELLITE
};
var map=new google.maps.map(document.getElementById(“map_canvas”),
肌肽);
//设置边界坐标
var BorderCoords=
[
新google.maps.LatLng(39.3952726888,-119.85922848),
新google.maps.LatLng(39.3925273112,-119.85922848),
新google.maps.LatLng(39.3925273112,-119.86277152),
新google.maps.LatLng(39.3952726888,-119.86277152)
];
//界定边界
Border=新建google.maps.Polygon
({
地图:地图,
路径:边界坐标,
strokeColor:#FF0000“,
笔划不透明度:0.8,
冲程重量:2
});
//设置标记坐标
var MarkerCoords=
[
[39.3930761,-119.8612324],
[39.3947606,-119.8617452],
[39.3948516,-119.8619689],
[39.3929412,-119.859542],
[39.3947902,-119.8601571],
[39.3940501,-119.8593369]
];
//设置标记属性
var MarkerProp=
[
[“红色”、“A”],
[“红色”、“B”],
[“红色”、“C”],
[“蓝色”、“A”],
[“蓝色”、“B”],
[“蓝色”、“C”]
];
//定义标记坐标
对于(变量i=0;i
JavaScript的一个优点是,您可以动态地分配对象字段。您可以做的一件事是给每个标记一个名称或id。要做到这一点,您只需说:
marker.id = whatever;
然后,通过调用marker.id,您可以像获取任何属性一样获取该属性的值
这可能是给他们唯一id的最有效的方法。在dragend的eventhandler中,您只需执行和if-then-else来检查它是哪个标记,并更新相关的输入字段。以下是答案。基于标记属性和访问输入字段id定义自定义id:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 100% }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript">
function initialize()
{
var latlng = new google.maps.LatLng(39.3939,-119.861);
var myOptions =
{
zoom: 17,
center: latlng,
mapTypeId: google.maps.MapTypeId.SATELLITE
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
// Set Border Coords
var BorderCoords =
[
new google.maps.LatLng(39.3952726888,-119.85922848),
new google.maps.LatLng(39.3925273112,-119.85922848),
new google.maps.LatLng(39.3925273112,-119.86277152),
new google.maps.LatLng(39.3952726888,-119.86277152)
];
// Define Border
Border = new google.maps.Polygon
({
map: map,
paths: BorderCoords,
strokeColor: "#FF0000",
strokeOpacity: 0.8,
strokeWeight: 2
});
// Set marker coords
var MarkerCoords =
[
[39.3930761,-119.8612324],
[39.3947606,-119.8617452],
[39.3948516,-119.8619689],
[39.3929412,-119.859542],
[39.3947902,-119.8601571],
[39.3940501,-119.8593369]
];
// Set marker properties
var MarkerProp =
[
["Red","A",],
["Red","B"],
["Red","C"],
["Blue","A"],
["Blue","B"],
["Blue","C"]
];
// Define marker coords
for (var i = 0; i < MarkerCoords.length; i++)
{
var markers = new google.maps.Marker
({
map: map,
position: new google.maps.LatLng(MarkerCoords[i][0],MarkerCoords[i][1]),
clickable: true,
draggable: true,
//define a custom id based on marker properties
my_id: MarkerProp[i][0] +"_"+MarkerProp[i][1],
icon: 'img/icons/'+MarkerProp[i][0]+'/letter_'+MarkerProp[i][1]+'.png'
});
google.maps.event.addListener(markers, "dragend", function()
{
//These variables will not work
//var latstr = eval('lat_'+MarkerProp[i][0]+'_'+MarkerProp[i][1]);
//var lngstr = eval('lng_'+MarkerProp[i][0]+'_'+MarkerProp[i][1]);
//var lat = document.getElementById(latstr);
//var lng = document.getElementById(lngstr);
//get the id of the marker
var marker_id = this.my_id;
//match the fields to update
var lat = document.getElementById('lat_' + marker_id);
var lng = document.getElementById('lng_' + marker_id);
var coords = this.getPosition()
lat.value = coords.lat();
lng.value = coords.lng();
});
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:700px; height:400px"></div>
<br/>
<input id="lat_Red_A" type="text">
<input id="lng_Red_A" type="text">
<br/>
<input id="lat_Red_B" type="text">
<input id="lng_Red_B" type="text">
<br/>
<input id="lat_Red_C" type="text">
<input id="lng_Red_C" type="text">
<br/>
<input id="lat_Blue_A" type="text">
<input id="lng_Blue_A" type="text">
<br/>
<input id="lat_Blue_B" type="text">
<input id="lng_Blue_B" type="text">
<br/>
<input id="lat_Blue_C" type="text">
<input id="lng_Blue_C" type="text">
<br/>
</body>
</html>
html{高度:100%}
正文{高度:100%;边距:0px;填充:0px}
#地图画布{高度:100%}
函数初始化()
{
var-latlng=newgoogle.maps.latlng(39.3939,-119.861);
变量myOptions=
{
缩放:17,
中心:拉特林,
mapTypeId:google.maps.mapTypeId.SATELLITE
};
var map=new google.maps.map(document.getElementById(“map_canvas”),
肌肽);
//设置边界坐标
var BorderCoords=
[
新google.maps.LatLng(39.3952726888,-119.85922848),
新google.maps.LatLng(39.3925273112,-119.85922848),
新google.maps.LatLng(39.3925273112,-119.86277152),
新google.maps.LatLng(39.3952726888,-119.86277152)
];
//界定边界
Border=新建google.maps.Polygon
({
地图:地图,
路径:边界坐标,
strokeColor:#FF0000“,
笔划不透明度:0.8,
冲程重量:2
});
//设置标记坐标
var MarkerCoords=
[
[39.3930761,-119.8612324],
[39.3947606,-119.8617452],
[39.3948516,-119.8619689],
[39.3929412,-119.859542],
[39.3947902,-119.8601571],
[39.3940501,-119.8593369]
];
//设置标记属性
var MarkerProp=
[
[“红色”、“A”和],
[“红色”、“B”],
[“红色”、“C”],
[“蓝色”、“A”],
[“蓝色”、“B”],
[“蓝色”、“C”]
];
//定义标记坐标
对于(变量i=0;i