百度地图封装js

 

var DEF_PI = Math.PI; // 3.14159265359
var DEF_2PI = 2 * Math.PI; // 6.28318530712
var DEF_PI180 = Math.PI / 180.0; // 0.01745329252
var DEF_R = 6370996.81; // radius of earth

function initMap(mapId, ptLng, ptLat, zoom, overviewMap, mapType) {
    var point = new BMap.Point(ptLng, ptLat);
    createMap(mapId, point, zoom);     //创建地图
    setMapEvent();   //设置地图事件
    addMapControl(overviewMap, mapType, point, 1); //向地图添加控件
}

function initMapByCityName(mapId, cityName, zoom, overviewMap, mapType) {
    createMap(mapId, cityName, zoom);     //创建地图
    setMapEvent();   //设置地图事件
    addMapControl(overviewMap, mapType, cityName, 0); //向地图添加控件
}

// 利用弧夹角方式计算地图上两点之间的距离，和百度地图计算结果不一致
function GetShortDistance(lon1, lat1, lon2, lat2) {
    var ew1, ns1, ew2, ns2;
    var dx, dy, dew;
    var distance;
    // 角度转换为弧度
    ew1 = lon1 * DEF_PI180;
    ns1 = lat1 * DEF_PI180;
    ew2 = lon2 * DEF_PI180;
    ns2 = lat2 * DEF_PI180;
    // 经度差
    dew = ew1 - ew2;
    // 若跨东经和西经180 度，进行调整
    if (dew > DEF_PI)
        dew = DEF_2PI - dew;
    else if (dew < -DEF_PI)
        dew = DEF_2PI + dew;
    dx = DEF_R * Math.cos(ns1) * dew; // 东西方向长度(在纬度圈上的投影长度)
    dy = DEF_R * (ns1 - ns2); // 南北方向长度(在经度圈上的投影长度)
    // 勾股定理求斜边长
    distance = Math.sqrt(dx * dx + dy * dy);
    return distance;
}

// 利用弧夹角方式计算地图上两点之间的距离，与百度方式一致
function GetLongDistance(lon1, lat1, lon2, lat2) {
    var ew1, ns1, ew2, ns2;
    var distance;
    // 角度转换为弧度
    ew1 = lon1 * DEF_PI180;
    ns1 = lat1 * DEF_PI180;
    ew2 = lon2 * DEF_PI180;
    ns2 = lat2 * DEF_PI180;
    // 求大圆劣弧与球心所夹的角(弧度)
    distance = Math.sin(ns1) * Math.sin(ns2) + Math.cos(ns1) * Math.cos(ns2) * Math.cos(ew1 - ew2);
    // 调整到[-1..1]范围内，避免溢出
    if (distance > 1.0)
        distance = 1.0;
    else if (distance < -1.0)
        distance = -1.0;
    // 求大圆劣弧长度
    distance = DEF_R * Math.acos(distance);
    return distance;
}

// 画线
function DrawLines(types, names, lons, lats) {
    var points = [];
    for (i = 0; i < lons.length; i++) {
        var point = new BMap.Point(lons[i], lats[i]);
        points.push(point);

        var _staContent = names[i].split("|");

        var sContent = "

"
                + "

"
                + _staContent[0]
                + "

"
                + "

"
                + "预计到站时间:" + _staContent[1]
                + "

"
                + "

"
                + "备注:" + _staContent[2] + "

" + "

";

        var staNameLabel = new BMap.Label(_staContent[0], {
            offset: new BMap.Size(20, -10)
        }); // 标注显示名称  

        // 设置label 文本框的样式  
        staNameLabel.setStyle({
            "borderColor": "red",
            "color": "red",
            "cursor": "pointer"
        });
        if (types[i] == "1") {
            var marker = createMark(point, sContent);
            map.addOverlay(marker); // 将标注添加到地图中
            marker.setLabel(staNameLabel); // 添加百度label  
        }
    }
    var polyline = new BMap.Polyline(points, { strokeColor: "blue", strokeWeight: 4, strokeOpacity: 0.5 });
    map.addOverlay(polyline);
}

// 设置鼠标获取地图上点的样式
function SetMouseCursor() {
    var drawingManager = new BMapLib.DrawingManager(map, {
        isOpen: true, //是否开启绘制模式
        enableDrawingTool: false, //是否显示工具栏
        drawingToolOptions: {
            anchor: BMAP_ANCHOR_TOP_RIGHT, //位置
            offset: new BMap.Size(5, 5), //偏离值
            scale: 0.8, //工具栏缩放比例
            drawingModes: [BMAP_DRAWING_CIRCLE]
        }
    });
}

//---内部调用方法--begin--//

//创建地图函数：
function createMap(mapId, pointOrName, zoom) {

    var map = new BMap.Map(mapId); //在百度地图容器中创建一个地图
    map.centerAndZoom(pointOrName, zoom); //设定地图的中心点和坐标并将地图显示在地图容器中
    window.map = map; //将map变量存储在全局
}

//地图事件设置函数：
function setMapEvent() {
    map.enableDragging(); //启用地图拖拽事件，默认启用(可不写)
    map.enableScrollWheelZoom(true); //启用地图滚轮放大缩小
   
    map.enableDoubleClickZoom(); //启用鼠标双击放大，默认启用(可不写)
   
    map.enableKeyboard(); //启用键盘上下左右键移动地图
    map.addEventListener("click", showInfo);
}

//地图控件添加函数：
function addMapControl(overviewMap, mapType, point, isPoint) {
    //向地图中添加缩放控件
    map.addControl(new BMap.NavigationControl({ anchor: BMAP_ANCHOR_TOP_LEFT, type: BMAP_NAVIGATION_CONTROL_LARGE, showZoomInfo: true }));
    //向地图中添加比例尺控件
    map.addControl(new BMap.ScaleControl({ anchor: BMAP_ANCHOR_BOTTOM_LEFT }));
    //为地图添加鹰眼控件
    if (overviewMap == 1) {
        map.addControl(new BMap.OverviewMapControl({ isOpen: true, anchor: BMAP_ANCHOR_BOTTOM_RIGHT }));
    }
    //为地图添加2D3D切换控件
    if (mapType == 1) {
        map.addControl(new BMap.MapTypeControl());
        if (isPoint == 1) {
            var gc = new BMap.Geocoder();
            gc.getLocation(point, function (rs) {
                var addComp = rs.addressComponents;
                map.setCurrentCity(addComp.city);
            });
        }
        else {
            map.setCurrentCity(point);
        }
    }

    map.enableScrollWheelZoom();
    map.enableAutoResize();
}

//设置标注点图片
var createMark = function (point, info_html) {
    var _icon = new BMap.Icon('../../images/node.png', new BMap.Size(11, 11), { anchor: new BMap.Size(5, 5) });
    var _marker = new BMap.Marker(point, { icon: _icon });
    _marker.addEventListener("click", function (e) {
        this.openInfoWindow(new BMap.InfoWindow(info_html));
    });

    return _marker;
}

//---内部调用方法--end--//