使用ArcGIS API For JavaScript绘制几何图形

已被阅读 2092 次 | 文章分类:ArcGIS API For Javascript | 2018-03-19 13:23

通过GIS API提供的"esri/toolbars/draw"类支持用户使用鼠标在地图上绘制geometry对象,包括点,多个点,多边形,矩形等，该篇文章讲解如何使用ArcGIS API For JavaScript绘制几何图形;

一.关键方法:

1.启用绘制工具:draw.activate(Draw.POINT); 2.绘制结束:draw.on("draw-complete",function(){}); 3.禁用绘制:draw.deactivate();

二.代码实例

                                        
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Draw Geometry</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.23/esri/css/esri.css">
    <script src="https://js.arcgis.com/3.23/"></script>
    <style type="text/css">
        .MapClass {
            width: 100%;
            height: 500px;
            border: 1px solid #000;
        }
    </style>  
    <script type="text/javascript">
    require([
        "esri/map",
        "dojo/on",
         "esri/dijit/Basemap",
        "esri/dijit/BasemapLayer",
        "esri/symbols/SimpleMarkerSymbol",
        "esri/symbols/SimpleLineSymbol",
        "esri/symbols/SimpleFillSymbol",
        "esri/toolbars/draw",
        "esri/graphic",
        "dojo/colors",
        "dojo/domReady!"],
        function (
            Map,
            on,
            Basemap,
            BasemapLayer,
            SimpleMarkerSymbol,
            SimpleLineSymbol,
            SimpleFillSymbol,
            Draw,
            Graphic,
            Color) {
            var provinceLayer = new BasemapLayer({
                url: "http://localhost:6080/arcgis/rest/services/gisTutorial/ProvincesService/MapServer"
            });
            var provincebasemap = new Basemap({
                layers: [provinceLayer],
                title: "中国",
                thumbnailUrl: "province.png"
            });
            var map = new Map("mapDiv", {
                basemap: provincebasemap,
                center: [120.127653, 36.009423]
            });
            //使用toolbar上的绘图工具
            var toolBar = new Draw(map);
            //创建点符号
            var pointSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE,new Color("#FFFFCC"),12);
            //线符号
            lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASH, new Color([255, 0, 0]), 3);
            //面符号
            polygonSymbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID, lineSymbol, new Color([255, 255, 0, 0.25]));
            //在这里为避免给每一个button绑定click事件带来的麻烦，此处使用javascript事件委托机制
            var drawTool = document.getElementById("drawTool");
            drawTool.onclick = function (evt) {
                var ev = ev || window.event;
                var target = ev.target || ev.srcElement;
                if (target.nodeName.toLocaleLowerCase() == 'button') {
                    switch (target.id) {
                        case 'point':
                            toolBar.activate(Draw.POINT, {
                                showTooltips: true
                            });
                            break;
                        case 'multipoint':
                            toolBar.activate(Draw.MULTI_POINT, {
                                showTooltips: true
                            })
                            break;
                        case 'line':
                            toolBar.activate(Draw.POLYLINE, {
                                showTooltips: true
                            })
                            break;
                        case 'polygon':
                            toolBar.activate(Draw.POLYGON, {
                                showTooltips: true
                            })
                            break;
                        case 'circle':
                            toolBar.activate(Draw.CIRCLE, {
                                showTooltips: true
                            })
                            break;
                        case 'rectangle':
                            toolBar.activate(Draw.RECTANGLE, {
                                showTooltips: true
                            })
                            break;
                        case "remove":
                            map.graphics.clear();
                            break;
                        case 'disabledraw':
                            toolBar.deactivate();
                            break;
                    }
                }
            }
            toolBar.on("draw-complete", drawEndEvent)
            function drawEndEvent(evt) {
                //添加图形到地图
                var symbol;
                if (evt.geometry.type === "point" || evt.geometry.type === "multipoint") {
                    symbol = pointSymbol;
                } else if (evt.geometry.type === "line" || evt.geometry.type === "polyline") {
                    symbol = lineSymbol;
                }
                else {
                    symbol = polygonSymbol;
                }
                map.graphics.add(new Graphic(evt.geometry, symbol))
            }
        });
    </script>
</head>
<body>
    <div id="mapDiv" class="MapClass"></div>
    <div id="drawTool">
        <button id="point">单点</button>
        <button id="multipoint">多点</button>
        <button id="line">折线</button>
        <button id="polygon">面</button>
        <button id="circle">圆行</button>
        <button id="rectangle">矩形</button>
        <button id="remove">清除</button>
        <button id="disabledraw">禁止绘制工具</button>
    </div>
</body>
</html>

三.效果图

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