leaflet绘制区域(仿高德地图效果)

摘要：官网效果脚本地图中心点昆明地图缩放层级缩放禁止双击放大版权切片图层地址绘制区域单击移动清除双击移除事件保存方便后面删除请入名称键盘事件键拖动

leaflet官网：http://leafletjs.com/

效果：

脚本：

var map = L.map("map", {
    center: [25.1026993454,102.9312515259], // 地图中心点(昆明)
    zoom: 16, // 地图缩放层级
    zoomControl: false, // 缩放
    doubleClickZoom: false, // 禁止双击放大
    attributionControl: false // 版权
});
var kmgLayer = L.tileLayer.wms("wms切片图层地址", {
    layers: "airport:kmg",
    format: "image/jpeg",
    transparent: false
});
map.addLayer(kmgLayer);

// 绘制区域
var layerObj = {};
function drawPolygon() {
    var points = [],
        points_length = 0,
        polyline,
        polygon;
    // 单击
    var clickFlag,
        clickTimes = 1,
        isDrag = false;
    map.on("mousedown", function(e) {
        map.off("mousemove");
        if(clickFlag) clearTimeout(clickFlag);
        clickFlag = setTimeout(function() {
            if(clickTimes==1 && !isDrag) {
                points.push([e.latlng.lat, e.latlng.lng]);
                points_length = points.length;
                // 移动
                map.on("mousemove", function(e) {
                    // 清除
                    if(polyline) map.removeLayer(polyline);
                    if(polygon) map.removeLayer(polygon);
                    // polyline
                    points[points_length] = [e.latlng.lat, e.latlng.lng];
                    polyline = new L.Polyline(points);
                    map.addLayer(polyline);
                    // polygon
                    polygon = new L.Polygon(points);
                    map.addLayer(polygon);
                });
            }
        }, 300);
    });
    // 双击
    map.on("dblclick", function() {
        if(points.length) {
            clickTimes = 2;
            // polyline
            polyline = new L.Polyline(points);
            map.addLayer(polyline);
            // polygon
            polygon = new L.Polygon(points);
            map.addLayer(polygon);
            // 移除事件
            map.off("mousemove");
            setTimeout(function() {
                clickTimes = 1;
                // 保存layer(方便后面删除)
                var layerName = prompt("请入名称");
                if(layerName) {
                    layerObj[layerName] = [polyline, polygon];
                    console.log(layerObj);
                }
                points = [];
            }, 300);
        }
    });
    // 键盘事件
    $(document).keyup(function(e) {
        if(e.keyCode == 27) {// esc键
            if(points.length) {
                map.off("mousemove");
                clickTimes = 1;
                map.removeLayer(polyline);
                map.removeLayer(polygon);
                points = [];
            }
        }
    });
    // 拖动
    map.on("movestart", function() {
        isDrag = true;
    });
    map.on("moveend", function() {
        isDrag = false;
    });
}
drawPolygon();