单击时提取drawingManager多边形路径Google Maps

Question

我有一个启用了绘图管理器的Google地图,用户可以在其中绘制多边形并将其保存到我的数据库中.我为overlaycomplete事件的drawingManager对象添加了一个事件监听器.触发事件时,多边形的坐标将写入隐藏字段.这很有效 - 唯一的问题是,如果在该点之后拖动/更改了各个顶点,则不会触发事件.我需要更新(任何)更改字段或在用户点击提交时迭代多边形顶点并将它们写入隐藏字段.我不知道如何让它工作,但你可以看到我到目前为止所拥有的:http://jsfiddle.net/5Y4WT/21/

HTML:

<div id="map_canvas" style="width:500px; height:450px;"></div>
<form method="post" accept-charset="utf-8" id="map_form">
  <input type="text" name="vertices" value="" id="vertices"  />
  <input type="button" name="save" value="Save!" id="save"  />
</form>

JavaScript的:

var map; // Global declaration of the map
var iw = new google.maps.InfoWindow(); // Global declaration of the infowindow
var lat_longs = new Array();
var markers = new Array();
var drawingManager;
function initialize() {
    var myLatlng = new google.maps.LatLng(40.9403762, -74.1318096);
    var myOptions = {
        zoom: 13,
        center: myLatlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP}
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    drawingManager = new google.maps.drawing.DrawingManager({
    drawingMode: google.maps.drawing.OverlayType.POLYGON,
    drawingControl: true,
    drawingControlOptions: {
                position: google.maps.ControlPosition.TOP_CENTER,
                drawingModes: [google.maps.drawing.OverlayType.POLYGON]
                },
                        polygonOptions: {
                            editable: true
                        }
            });
            drawingManager.setMap(map);

            google.maps.event.addListener(drawingManager, "overlaycomplete", function(event) {
                var newShape = event.overlay;
                newShape.type = event.type;
            });

            google.maps.event.addListener(drawingManager, 'overlaycomplete', function(event) {
                $('#vertices').val(event.overlay.getPath().getArray());
            });
        }
 initialize();

$(function(){
    $('#save').click(function(){
        //iterate polygon vertices?
    });
});

Answer 1

弄清楚了!!

我添加了功能overlayClickListener:

function overlayClickListener(overlay) {
    google.maps.event.addListener(overlay, "mouseup", function(event){
        $('#vertices').val(overlay.getPath().getArray());
    });
}

并将其附加到overlaycomplete上的叠加层:

google.maps.event.addListener(drawingManager, "overlaycomplete", function(event){
                overlayClickListener(event.overlay);
                $('#vertices').val(event.overlay.getPath().getArray());
            });

有关解决方案的实际应用,请参见此处:http://jsfiddle.net/rvsMH/1/