上一篇实现了demo的地图分屏对比模块,本篇新增图层控制模块,截图如下(源代码见文章底部):
图层控制模块实现的思路如下: 1.在地图配置文件map.config.js里面配置图层目录树节点信息,作为主界面图层控制的数据源: - /*图层目录构造*/
- MapConfig.zNodes = [
- { id: 1, pId: 0, name: "图层目录", checked: false, iconOpen: "" + getRootPath() + "Content/images/legend/1_open.png", iconClose: "" + getRootPath() + "Content/images/legend/1_close.png" },
- { id: 11, pId: 1, name: "餐饮", layerurl: MapConfig.vecMapUrl, layerid: "layer0", checked: false, icon: "" + getRootPath() + "Content/images/legend/0.png" },
- { id: 12, pId: 1, name: "购物", layerurl: MapConfig.vecMapUrl, layerid: "layer1", checked: false, icon: "" + getRootPath() + "Content/images/legend/1.png" },
- { id: 13, pId: 1, name: "金融服务", layerurl: MapConfig.vecMapUrl, layerid: "layer2", checked: false, icon: "" + getRootPath() + "Content/images/legend/2.png" },
- { id: 14, pId: 1, name: "科研教育", layerurl: MapConfig.vecMapUrl, layerid: "layer3", checked: false, icon: "" + getRootPath() + "Content/images/legend/3.png" },
- { id: 15, pId: 1, name: "医疗服务", layerurl: MapConfig.vecMapUrl, layerid: "layer4", checked: false, icon: "" + getRootPath() + "Content/images/legend/4.png" },
- { id: 16, pId: 1, name: "住宿", layerurl: MapConfig.vecMapUrl, layerid: "layer5", checked: false, icon: "" + getRootPath() + "Content/images/legend/5.png" }
- ];
复制代码2.实现图层控制功能模块在map.catalog.js文件以及ztree插件js、css需要在主页面map.html引用进来: - <script type="text/javascript" src="js/main/map.catalog.js"></script>
- <link href="js/plugins/ztree/zTreeStyle/img/zTreeStyle.css" rel="stylesheet" />
- <script src="js/plugins/ztree/jquery.ztree.min.js"></script>
复制代码3.map.catalog.js实现图层控制核心讲解: 利用ztree的勾选监听事件来控制当前图层的显示或者不显示: - onCheck: function (e, treeId, treeNode) {
- if (treeNode.checked) {//勾选状态下,加载底图
- if (treeNode.children) { //勾选专题目录
- for (var i = 0; i < treeNode.children.length; i++) {
- DCI.Catalog.loadServerTypeMap("mapservice", treeNode.children[i].layerurl, treeNode.children[i].layerid);
- }
- }
- else {//勾选叶节点
- DCI.Catalog.loadServerTypeMap("mapservice", treeNode.layerurl, treeNode.layerid);
- }
- }
- else { //去掉勾选框,去掉底图
- if (treeNode.children) { //专题目录
- for (var i = 0; i < treeNode.children.length; i++) {
- DCI.Catalog.deleteServerTypeMap(treeNode.children[i].layerid);
- }
- }
- else {//叶节点
- DCI.Catalog.deleteServerTypeMap(treeNode.layerid);
- }
- }
- }
复制代码关键两个函数: - /**
- * 删除指定ID的图层
- */
- deleteServerTypeMap: function (layerid) {
- //切换的服务图层对象
- var curLyr = DCI.Catalog.map.getLayer(layerid);
- if (curLyr)
- DCI.Catalog.map.removeLayer(curLyr);
- }
复制代码- /**
- * 加载不同类型地图服务的底图
- [url=home.php?mod=space&uid=455428]@[/url] servertype 地图服务类型
- @ url 地图服务的url
- @ layerid 地图图层的id
- */
- loadServerTypeMap: function (servertype, url, layerid) {
- var curLyr;//切换的服务图层对象
- var ids = layerid.replace('layer', '');
- ids = parseInt(ids);
- switch (servertype.toLowerCase()) {//统一转换小写判断
- case 'mapserver_t':
- curLyr = new esri.layers.ArcGISTiledMapServiceLayer(url);
- curLyr.id = layerid;
- break;
- case 'mapservice':
- var imageParameters = new esri.layers.ImageParameters();
- imageParameters.layerIds = [ids];
- imageParameters.layerOption = esri.layers.ImageParameters.LAYER_OPTION_SHOW;
- imageParameters.transparent = true;
- curLyr = new esri.layers.ArcGISDynamicMapServiceLayer(url,
- { "imageParameters": imageParameters });
- //curLyr = new esri.layers.ArcGISDynamicMapServiceLayer(url);
- curLyr.id = layerid;
- break;
- default://默认
- promptdialog("提示信息", "二维地图模式下,勾选图层中出现识别不到的地图服务类型,请检查是否符合正确的地图服务类型标准!");
- break;
- }
- if (curLyr)
- DCI.Catalog.map.addLayer(curLyr);
- },
复制代码4.在map.js地图初始化函数调用即可: - //地图图层
- var panel2 = DCI.sidebarCtrl.createItem("地图图层", "图层", true, "nav_but_layer", "layermodel");
- panel2.append(DCI.Catalog.Html);//加载显示的内容
- DCI.Catalog.Init(map);
复制代码
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