Question

我想创建一个简单的应用程序，用户可以绘制一个圆圈并调整大小并拖动它并在最后接收中心位置和距离。我做了它并且它工作正常但是当拖动或调整圆形时，事件不会触发。

这是我的代码，请注意overlaycomplete和circlecomplete有效。

<script src="https://maps.googleapis.com/maps/api/js?libraries=drawing"></script>
<div id="map-canvas"></div>


<script type="text/javascript">

function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(-34.397, 150.644),
        zoom: 8,
        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.CIRCLE,
        drawingControl: false,
        drawingControlOptions: {
            position: google.maps.ControlPosition.TOP_CENTER,
            drawingModes: [
                google.maps.drawing.OverlayType.CIRCLE
            ]
        },
        circleOptions: {
            fillColor: '#000000',
            fillOpacity: 0.6,
            strokeWeight: 2,
            clickable: false,
            editable: true,
            zIndex: 1
        }
    });

    google.maps.event.addListener(drawingManager, 'overlaycomplete', function(e) {
        var coordinates = (e);
        drawingManager.setDrawingMode(null);
      });

    google.maps.event.addListener(drawingManager, 'circlecomplete', function (e) {
        var coordinates = (e);
        console.log(coordinates);
        console.log('radius', coordinates.getRadius());
        console.log(coordinates.getCenter().lat())
        console.log(coordinates.getCenter().lng())
    });


    google.maps.event.addListener(drawingManager, 'center_changed', function (e) {
        var coordinates = (e);
        console.log(coordinates);
        console.log('radius', coordinates.getRadius());
        console.log(coordinates.getCenter().lat())
        console.log(coordinates.getCenter().lng())
    });


    google.maps.event.addListener(drawingManager, 'distance_changed', function (e) {
        var coordinates = (e);
        console.log(coordinates);
        console.log('radius', coordinates.getRadius());
        console.log(coordinates.getCenter().lat())
        console.log(coordinates.getCenter().lng())
    });

    drawingManager.setMap(map);

};

google.maps.event.addDomListener(window, 'load', initialize);

</script>

Answer 1

似乎center_changed和distance_changed不是DrawingManager Class发送的事件

Map class调度了一个center_changed事件，但是当地图中心发生变化时触发此事件，而不是圆形覆盖的中心。

编辑:(未经测试）

您必须使用radius_changed，drag或dragend

等Circle重叠式实例事件

google.maps.event.addListener(drawingManager, 'circlecomplete', function (circle) {
    console.log('radius at creation', circle.getRadius());
    console.log('lat at creation', circle.getCenter().lat())
    console.log('lon at creation', circle.getCenter().lng())
    google.maps.event.addListener(circle, 'radius_changed', function () {
        console.log('radius after change', circle.getRadius());
        console.log('lat after radius change', circle.getCenter().lat())
        console.log('lon after radius change', circle.getCenter().lng())
     });
    google.maps.event.addListener(circle, 'dragend', function () {
        console.log('radius at dragend', circle.getRadius());
        console.log('lat at dragend', circle.getCenter().lat())
        console.log('lon at dragend', circle.getCenter().lng())
     });
});

有些事件没有触发

1 个答案: