自定义的地图类 #4

topcss · 2018-12-04T07:29:29Z

<!DOCTYPE html>
<html>

<head>
    <title>Draw and Modify Features</title>
    <link rel="stylesheet" href="http://localhost:42000/assets/js/map/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="http://localhost:42000/assets/js/map/ol.js"></script>
</head>

<body>
    <div id="map" class="map"></div>
    
    <script>
        var raster = new ol.layer.Tile({
            source: new ol.source.OSM()
        });

        var map = new ol.Map({
            layers: [raster],
            target: 'map',
            view: new ol.View({
                center: [-11000000, 4600000],
                zoom: 4
            })
        });
        

        var MapController = function (map, callback) {

            var drawkSettings = {
                fill: new ol.style.Fill({
                    color: 'rgba(255, 255, 255, 0.2)'
                }),
                stroke: new ol.style.Stroke({
                    color: '#ffcc33',
                    width: 2
                }),
                image: new ol.style.Circle({
                    radius: 7,
                    fill: new ol.style.Fill({
                        color: '#ffcc33'
                    })
                })
            }

            var features = new ol.Collection();
            var featureOverlay = new ol.layer.Vector({
                source: new ol.source.Vector({ features: features }),
                style: new ol.style.Style(drawkSettings)
            });
            featureOverlay.setMap(map);

            // propties

            // 创建修改交互控件
            var modify = new ol.interaction.Modify({
                features: features,
                change: changed,

                deleteCondition: function (event) {
                    changed();

                    return ol.events.condition.shiftKeyOnly(event) &&
                        ol.events.condition.singleClick(event);
                }
            });

            function changed() {
                // 修改之后触发
                if (callback) callback();
            }

            // 创建绘制交互控件
            var draw = new ol.interaction.Draw({ features: features, type: 'Point', change: changed });

            // methods
            this.startModify = function () {
                this.stopModify();

                map.addInteraction(modify);
            }
            this.startDraw = function (type) {
                this.stopDraw();

                draw = new ol.interaction.Draw({
                    features: features,
                    type: type || 'Point'
                });
                map.addInteraction(draw);
            }
            this.stopModify = function () {
                map.removeInteraction(modify);
            }
            this.stopDraw = function () {
                map.removeInteraction(draw);
            }
            this.addPoint = function (x, y) {
                features.push(new ol.Feature(new ol.geom.Point([x, y])));

                changed();
            }
            this.getPoints = function () {
                return features;
            }
        }


        // code 
        var myMapController = new MapController(map,
            function () {
                console.log(myMapController.getPoints().getArray()[0].getGeometry().getCoordinates());
            });
        myMapController.addPoint(0, 0);

    </script>
</body>

</html>

topcss added the 🔫Javascript label Jun 27, 2019

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自定义的地图类 #4

自定义的地图类 #4

topcss commented Dec 4, 2018

自定义的地图类 #4

自定义的地图类 #4

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topcss commented Dec 4, 2018