javascript - 在 Google Maps API v3 中修改多边形后的事件

Question

我制作了一个使用绘图管理器(并实现可选形状)的 map 应用程序。该程序的工作原理如下:当完成绘制多边形后，单击按钮，将路径映射到多边形上。

在此过程之后编辑多边形时，我希望再次调用映射函数。但是我无法让这部分工作:

我尝试使用以下代码，但总是收到错误，因为添加此监听器时尚未选择任何形状。我能做什么？

google.maps.event.addListener(selectedShape, 'set_at', function() {
    console.log("test");
});

google.maps.event.addListener(selectedShape, 'insert_at', function() {
    console.log("test");
});

重要的代码片段:

function showDrawingManager(){
    var managerOptions = {
        drawingControl: true,
        drawingControlOptions: {
            position: google.maps.ControlPosition.TOP_CENTER,
            drawingModes: [google.maps.drawing.OverlayType.MARKER, google.maps.drawing.OverlayType.POLYLINE, google.maps.drawing.OverlayType.POLYGON]
        },
        markerOptions: {
            editable: true,
            icon: '/largeTDGreenIcons/blank.png'
        },
        polygonOptions: {
            fillColor: "#1E90FF",
            strokeColor: "#1E90FF",
        },
        polylineOptions: {
            strokeColor: "#FF273A"
        }
    }

    var drawingManager = new google.maps.drawing.DrawingManager(managerOptions);
    drawingManager.setMap(map);
    return drawingManager;
}

function clearSelection() {
    if (selectedShape) {
        console.log("clearSelection");

        selectedShape.setEditable(false);
        selectedShape = null;
        numberOfShapes--;
    }
}

function setSelection(shape) {

   console.log("setSelection");

   clearSelection();
   selectedShape = shape;
   shape.setEditable(true);
   numberOfShapes++;
   //getInformation(shape);
}

function initialize(){

    //....

    var drawingManager = showDrawingManager();
    google.maps.event.addListener(drawingManager, 'overlaycomplete', function(e) {
        if (e.type != google.maps.drawing.OverlayType.MARKER) {
            // Switch back to non-drawing mode after drawing a shape.
            drawingManager.setDrawingMode(null);

            // Add an event listener that selects the newly-drawn shape when the user
            // mouses down on it.
            var newShape = e.overlay;
            newShape.type = e.type;
            google.maps.event.addListener(newShape, 'click', function() {
                setSelection(newShape);
            });
            setSelection(newShape);
        }
    });

Answer 1

我通过调用 .getPath() 并将监听器放入监听器中来解决这个问题，每次单击形状时都会调用该监听器。我认为 Google API 文档对于如何使用 set_at 不是很清楚，因此它对其他人也可能有用。

// Add an event listener that selects the newly-drawn shape when the user
// mouses down on it.
var newShape = e.overlay;
newShape.type = e.type;
google.maps.event.addListener(newShape, 'click', function() {
    google.maps.event.addListener(newShape.getPath(), 'set_at', function() {
        console.log("test");
    });

    google.maps.event.addListener(newShape.getPath(), 'insert_at', function() {
        console.log("test");
    });
    setSelection(newShape);
});