编写代码:使arcgis api for js中sketch绘制的图形不可编辑
时间: 2024-01-27 15:03:59 浏览: 24
要使ArcGIS API for JS中Sketch绘制的图形不可编辑,可以在创建Sketch对象时,设置其editable属性为false。如下所示:
```javascript
var sketch = new Sketch({
layer: graphicsLayer,
view: view,
editable: false // 设置不可编辑
});
```
此外,您还可以将Sketch对象中的所有图形设置为不可编辑。如下所示:
```javascript
sketch.layer.graphics.forEach(function(graphic) {
graphic.geometry = graphic.geometry.clone();
graphic.symbol = sketch.viewModel.graphicSymbols[graphic.geometry.type];
graphic.editable = false; // 设置不可编辑
});
```
这将遍历Sketch对象的每个图形,并将其editable属性设置为false。这样,用户就无法编辑或修改Sketch绘制的图形。
相关问题
编写代码:arcgis api for js中sketch多选形状
以下是 ArcGIS API for JavaScript 中使用 Sketch 多选形状的示例代码:
```javascript
require([
"esri/views/MapView",
"esri/WebMap",
"esri/widgets/Sketch",
"esri/layers/GraphicsLayer",
"esri/Graphic",
"dojo/domReady!"
], function(MapView, WebMap, Sketch, GraphicsLayer, Graphic) {
// Create a WebMap instance and set the map id to "map"
var webmap = new WebMap({
portalItem: {
id: "your-webmap-id-here"
}
});
// Create a MapView instance for the "map" div
var view = new MapView({
container: "map",
map: webmap
});
// Create a GraphicsLayer for the sketch and add it to the map
var sketchLayer = new GraphicsLayer();
view.map.add(sketchLayer);
// Create a new Sketch widget and add it to the view
var sketch = new Sketch({
layer: sketchLayer,
view: view,
creationMode: "update"
});
view.ui.add(sketch, "top-right");
// Listen for the "create" event on the Sketch widget
sketch.on("create", function(event) {
if (event.state === "complete") {
var graphics = event.graphic;
if (graphics.geometry.type === "polygon") {
// If a polygon was created, select all graphics within the polygon
var selectedGraphics = sketchLayer.graphics.filter(function(graphic) {
return graphics.geometry.contains(graphic.geometry);
});
view.graphics.removeAll();
selectedGraphics.forEach(function(graphic) {
graphic.symbol.color = "red";
view.graphics.add(graphic);
});
}
}
});
});
```
该代码使用 ArcGIS API for JavaScript 创建了一个包含 Sketch 组件的地图,并在该组件中实现了多选形状的功能。当用户在 Sketch 组件中创建一个多边形时,该代码会选择所有在该多边形内的图形,并在视图中突出显示它们。注意,该代码仅适用于多边形选择,如果需要支持其他形状的选择,需要进行相应的修改。
根据下面的描述给出详细代码和和解释:ArcGIS API for JavaScript使用Sketch绘制多边形,包含在多边形内的FeatureLayer中的要素高亮显示
首先,我们需要创建一个地图对象和一个多边形绘制工具对象。
```javascript
require([
"esri/map",
"esri/toolbars/draw",
"esri/graphic",
"esri/layers/FeatureLayer",
"dojo/domReady!"
], function(Map, Draw, Graphic, FeatureLayer) {
var map = new Map("mapDiv", {
basemap: "streets",
center: [-98.5795, 39.8282],
zoom: 4
});
var toolbar = new Draw(map);
});
```
然后,我们需要监听多边形绘制完成事件,并获取绘制的多边形。接着,我们需要查询包含在多边形内的要素,并将这些要素高亮显示。
```javascript
toolbar.on("draw-end", function(evt) {
// 获取绘制的多边形
var geometry = evt.geometry;
// 创建查询任务
var query = new esri.tasks.Query();
query.geometry = geometry;
// 查询要素
var featureLayer = new FeatureLayer("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3");
featureLayer.selectFeatures(query, FeatureLayer.SELECTION_NEW, function(features) {
// 高亮显示要素
var symbol = new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([255, 0, 0, 0.5]));
for (var i = 0; i < features.length; i++) {
var graphic = new Graphic(features[i].geometry, symbol);
map.graphics.add(graphic);
}
});
});
```
在这段代码中,我们创建了一个`Query`对象,并将绘制的多边形设置为查询的几何对象。然后,我们创建了一个`FeatureLayer`对象,并调用`selectFeatures`方法进行查询。查询结果将作为回调函数的参数`features`返回。最后,我们循环遍历查询结果,创建一个`Graphic`对象,并将其添加到地图的`graphics`图层中,从而高亮显示查询结果。