上一篇实现了demo的地图查询功能,本篇新增地图态势标绘模块,截图如下:
- require(["esri/toolbars/draw"], function(Draw) { /* code goes here */ });
复制代码构造函数: 一般来说,传参map对象进来就行,其他参数可选的,用默认的就行,除非你想专门设置; 默认的可绘制图形类型常量Constants: - ARROW Draws an arrow.箭头
- CIRCLE Draws a circle.圆形
- DOWN_ARROW Draws an arrow that points down.下箭头
- ELLIPSE Draws an ellipse.椭圆
- EXTENT Draws an extent box.矩形
- FREEHAND_POLYGON Draws a freehand polygon.手绘多边形
- FREEHAND_POLYLINE Draws a freehand polyline.手绘线
- LEFT_ARROW Draws an arrow that points left.左箭头
- LINE Draws a line.线
- MULTI_POINT Draws a Multipoint.多点
- POINT Draws a point.点
- POLYGON Draws a polygon.多边形
- POLYLINE Draws a polyline.折线
- RECTANGLE Draws a rectangle.矩形
- RIGHT_ARROW Draws an arrow that points right.右键头
- TRIANGLE Draws a triangle.三角形
- UP_ARROW Draws an arrow that points up.上箭头
复制代码可以设置绘制的符号样式: 其中,activate函数可以激活触发绘制的行为,绘制结束之后在绘制结束事件里面获取geometry: - activate(geometryType, options?)
复制代码
地图态势标绘实现的思路:利用API的Draw工具实现普通的点线面绘制,但是对于燕尾箭头、集结地、弧线、曲线、简单箭头等特殊的军事态势需要自定义来绘制了,所以需要拓展Draw工具才能实现,也是本篇的精华所在。 一、下面谈谈怎么在项目引用拓展Draw类js文件: 1是继承拓展Draw的文件目录;2是实现态势标绘模块的js文件。 首先,需要在map.html页面引用进来: - <script type="text/javascript">
- //配置arcgis拓展解析天地图服务类引用的路径
- dojoConfig = {
- parseOnLoad: true,
- packages: [{
- name: 'tdlib',
- location: this.location.pathname.replace(/\/[^/]+$/, "") + "/js/tdlib"
- }],
- paths: {
- Extension: location.pathname.replace(/\/[^/]+$/, "") + "/js/main/drawExtension/Extension",
- ExtensionDraw: location.pathname.replace(/\/[^/]+$/, "") + "/js/main/drawExtension/plotDraw"
- }
- };
- </script>
复制代码其中,paths代表需要引用的路径。 - <script type="text/javascript" src="js/main/map.plot.js"></script>
复制代码其次,在map.js文件的初始化里面引用拓展的js文件DrawEx以及DrawExt: - (function () {
- dojo.require("Extension.DrawEx");
- dojo.require("ExtensionDraw.DrawExt");
- })();
复制代码最后,在工具栏菜单的态势标绘菜单响应事件里面调用plot.js即可: - //态势标绘
- $("#bPlot").click(function () {
- //初始化军势标绘接口
- if (!DCI.Plot.isload)
- DCI.Plot.Init(map);
- if (DCI.Plot.dialog)
- DCI.Plot.dialog.close();
- DCI.Plot.dialog = jDialog.dialog({
- title: '态势标绘',
- width: 370,
- height: 200,
- left: 450,
- top: 200,
- modal: false, // 非模态,即不显示遮罩层
- content: DCI.Plot.Html
- });
- DCI.Plot.InitEvent();
- });
复制代码二、谈谈Draw工具调用的思路,不管调用arcgis api原生态的Draw,还是拓展Draw的,都是先创建一个Draw对象,然后监听Draw的draw-end绘制结束的回调函数,获取绘制的图形叠加在地图显示;Draw工具的activate函数会触发draw-end回调函数; 首先,初始化Draw工具对象以及默认的符号样式symbol: - //定义默认点 线 面符号
- DCI.Plot.markerSymbol = new esri.symbol.SimpleMarkerSymbol(esri.symbol.SimpleMarkerSymbol.STYLE_CIRCLE, 8, new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255, 69, 0]), 2), new dojo.Color([255, 255, 255, 1]));
- DCI.Plot.lineSymbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255, 160, 122]), 2);
- DCI.Plot.fillSymbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID, new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255, 160, 122]), 2), new dojo.Color([255, 255, 255, 0.5]));
- //初始化拓展Draw
- DCI.Plot.toolbar = new Extension.DrawEx(map);
- DCI.Plot.toolbar.on("draw-end", DCI.Plot.addToMap);
- DCI.Plot.toolbar1 = new ExtensionDraw.DrawExt(map);
- DCI.Plot.toolbar1.on("draw-end", DCI.Plot.addToMap);
- //arcgis api自带的Draw
- DCI.Plot.drawToolbar = new esri.toolbars.Draw(map);
- DCI.Plot.drawToolbar.markerSymbol = DCI.Plot.markerSymbol;
- DCI.Plot.drawToolbar.lineSymbol = DCI.Plot.lineSymbol;
- DCI.Plot.drawToolbar.fillSymbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawToolbar.on("draw-end", DCI.Plot.drawEnd);
复制代码其次,触发调用Draw绘制: - case 0://plot_freehandline
- DCI.Plot.drawFreeHandPolyline(null, function (geometry) {
- symbol = DCI.Plot.lineSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 1://plot_line
- DCI.Plot.drawPolyline(null, function (geometry) {
- symbol = DCI.Plot.lineSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 2://emergency_freehand
- DCI.Plot.drawFreeHandPolygon(null, function (geometry) {
- symbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 3://plot_polygon
- DCI.Plot.drawPolygon(null, function (geometry) {
- symbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 4://plot_extent
- DCI.Plot.drawExtent(null, function (geometry) {
- symbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 5://emergency_freehand
- DCI.Plot.drawCircle(null, function (geometry) {
- symbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 6://直角箭头
- DCI.Plot.drawStraightArrow(null, function (geometry) {
- symbol = DCI.Plot.fillSymbol;
- DCI.Plot.drawEndPlot(geometry, symbol);
- });
- break;
- case 7://简单箭头
- DCI.Plot.toolbar.activate(Extension.DrawEx.FREEHAND_ARROW);
- break;
- case 8://燕尾箭头
- DCI.Plot.toolbar1.fillSymbol = DCI.Plot.fillSymbol;
- DCI.Plot.toolbar1.activate("tailedsquadcombat");
- break;
- case 9://集结地
- DCI.Plot.toolbar.activate(Extension.DrawEx.BEZIER_POLYGON);
- break;
- case 10://弧线
- DCI.Plot.toolbar.activate(Extension.DrawEx.CURVE);
- break;
- case 11://曲线
- DCI.Plot.toolbar.activate(Extension.DrawEx.BEZIER_CURVE);
- break;
复制代码- //画点
- drawPoint: function (symbol, onDrawEnd) {
- DCI.Plot.onDrawEnd = onDrawEnd;
- if (symbol) {
- DCI.Plot.drawToolbar.markerSymbol = symbol;
- }
- DCI.Plot.drawToolbar.activate(esri.toolbars.Draw.POINT);
- DCI.Plot.disablePan();
- },
- //画折线
- drawPolyline: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.lineSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.POLYLINE);
- this.disablePan();
- },
- //自由线
- drawFreeHandPolyline: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.lineSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.FREEHAND_POLYLINE);
- this.disablePan();
- },
- //画多边形
- drawPolygon: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.fillSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.POLYGON);
- this.disablePan();
- },
- //手绘多边形
- drawFreeHandPolygon: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.fillSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.FREEHAND_POLYGON);
- this.disablePan();
- },
- //画圆形
- drawCircle: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.fillSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.CIRCLE);
- this.disablePan();
- },
- //画矩形
- drawExtent: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.fillSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.EXTENT);
- this.disablePan();
- },
- //直角箭头
- drawStraightArrow: function (symbol, onDrawEnd) {
- this.onDrawEnd = onDrawEnd;
- if (symbol) {
- this.drawToolbar.fillSymbol = symbol;
- }
- this.drawToolbar.activate(esri.toolbars.Draw.ARROW);
- this.disablePan();
- },
复制代码最后,添加绘制图形在地图上展示: - /**
- * 绘制完毕调用的函数
- */
- drawEndPlot: function (geometry,symbol) {
- var title = "标题";
- var htmlCon = "测试内容测试内容";
- var attr = { "title": title, "content": htmlCon};
- var graphic = new esri.Graphic(geometry, symbol, attr);
- DCI.Plot.graphicslayer.add(graphic);
- DCI.Plot.deactivateDraw();
- DCI.Plot.map.setMapCursor('auto');//设置鼠标的光标
- },
复制代码- /**
- * 拓展Draw绘制完毕调用的函数
- */
- addToMap: function (evt) {
- DCI.Plot.map.setMapCursor('auto');//设置鼠标的光标
- var symbol;
- DCI.Plot.toolbar.deactivate();
- DCI.Plot.toolbar1.deactivate();
- switch (evt.geometry.type)
- {
- case "point":
- case "multipoint":
- symbol = DCI.Plot.markerSymbol;
- break;
- case "polyline":
- symbol = DCI.Plot.lineSymbol;
- break;
- default:
- symbol = DCI.Plot.fillSymbol;
- break;
- }
- var title = "标题";
- var htmlCon = "测试内容测试内容";
- var attr = { "title": title, "content": htmlCon};
- var graphic = new esri.Graphic(evt.geometry, symbol, attr);
- DCI.Plot.graphicslayer.add(graphic);
- },
复制代码
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