基于 OpenLayers地图加载功能Javascript类定义

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MapCwgisLoadMapCmd.js
//定义加载地图的命令功能//vp:hsg,myk//create date:2013-07-29MapCwgisLoadMapCmd = 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);    }}//
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