基于 OpenLayers地图加载功能Javascript类定义

基于 OpenLayers地图加载功能Javascript类定义

MapCwgisLoadMapCmd.js

//定义加载地图的命令功能
//vp:hsg,myk
//create date:2013-07-29
MapCwgisLoadMapCmd = OpenLayers.Class(mapCwgisPluginCommand,
{
    //定义类  注销函数
    dispose: function () {
    },
    //定义单击事件
    onClick: function () {
        if (cmToolBar != null) {
            cmToolBar.deactivateItems();
        }
        var wms_url = this.mapWrap.wms_url;
        var defaultProjection = this.mapWrap.defaultProjection;
        var defaultFormat = this.mapWrap.defaultFormat;
        var bounds = this.mapWrap.defaultBounds;
        //图层名称
        var layer_DOM = this.mapWrap.layer_DOM;   //DOM层名;
        var layer_XZQ = this.mapWrap.layer_XZQ;   //行政区层名
        var layer_DX = this.mapWrap.layer_DX;  //其他地类层名
        var layer_ZD = this.mapWrap.layer_ZD;    //宗地层名
        var layer_ZD_LS = this.mapWrap.layer_ZD_LS;  //宗地历史图层名称
        //定义一个影像地图服务层
        //layers: layer_DOM + ',' + layer_XZQ + ',' + layer_DX + ',' + layer_ZD + ',' + layer_ZD_LS,
        mapWrap.map_Raster = new OpenLayers.Layer.WMS(
                "影像", wms_url,
				{
				    layers: layer_DOM + ',' + layer_XZQ + ',' + layer_DX + ',' + layer_ZD_LS + ',' + layer_ZD,
				    styles: '',
				    tiled: true,
				    srs: defaultProjection,
				    format: defaultFormat
				},
				{
				    singleTile: true, ratio: 1
				}
       );
        //定义一个宗地矢量服务层
        this.mapWrap.map_Cadastra = new OpenLayers.Layer.WMS(
                "宗地", wms_url,
				{
				    layers: layer_XZQ + ',' + layer_DX + ',' + layer_ZD_LS + ',' + layer_ZD,
				    styles: '',
				    tiled: true,
				    srs: defaultProjection,
				    format: defaultFormat
				},
				{
				    singleTile: true, ratio: 1
				}
       );
        this.mapWrap.layer_Editor = new OpenLayers.Layer.Vector("编辑层");
        this.mapWrap.layer_Highlight = new OpenLayers.Layer.Vector("高亮显示层");
        //添加图层到地图
        this.mapWrap.map.addLayers([this.mapWrap.map_Raster, this.mapWrap.layer_Editor, this.mapWrap.layer_Highlight]);
        this.mapWrap.map.setCenter(new OpenLayers.LonLat(0, 0), 3);
        //添加查询图层到地图
        this.mapWrap.layer_Query = mapWrap.createLayerQuery("查询图层");
        this.mapWrap.map.addLayers([this.mapWrap.layer_Query]);
        //获取地图最大范围
        var t_maxExtent = this.mapWrap.map.getMaxExtent();
        if (t_maxExtent != null) {
            this.mapWrap.defaultBounds = t_maxExtent;
            bounds = t_maxExtent;
        }
        //放大到指定范围地图
        this.mapWrap.map.zoomToExtent(bounds);
    },
    //交换显示地图
    //isCadastraMap=true：打开宗地图，不含影像
    //isCadastraMap=false：打开宗地图，含影像
    isCadastraMap: false,
    //交换显示地图方法
    switchMap: function () {
        this.switchMapByParam(this.isCadastraMap);
    },
    switchMapByParam: function (isChecked) {
        if (isChecked) {
            if (this.mapWrap.map_Raster != null) {
                this.mapWrap.map.removeLayer(this.mapWrap.map_Raster);
                this.mapWrap.map.addLayer(this.mapWrap.map_Cadastra);
            }
        }
        else {
            if (this.mapWrap.map_Cadastra != null) {
                this.mapWrap.map.removeLayer(this.mapWrap.map_Cadastra);
                this.mapWrap.map.addLayer(this.mapWrap.map_Raster);
            }
        }
    },
    CLASS_NAME: "MapCwgisLoadMapCmd"
    //
});

//加载地图并显示
var lmcmd = new MapCwgisLoadMapCmd(mapWrap);
lmcmd.init(mapWrap);
lmcmd.onClick();
//
//切换地图主题函数(矢量/影像切换模式)
function switchMap(isChecked) {
    if (lmcmd != null) {
        lmcmd.switchMapByParam(isChecked);
    }
}
//

转载自：https://blog.csdn.net/hsg77/article/details/22333067