JS API 3.x - Select multiple features by mouse click event

Valgenmap — Wed, 30 Dec 2020 08:54:22 GMT

I am trying to select multiple features in a feature layer by using "hold 'ctrl' button and mouse click event". I am using ArcGIS JS API 3.x.

I am creating the US State boundary by using FeatureCollection, [Able to display the boundary on map] I have to select multiple states by mouse click while holding 'ctrl' or 'alt' key.

var featureLayer = new esri.layers.FeatureLayer(featureCollection, { id: stateLayer, opacity: 0.30, visible: true, infoTemplate: infoTemplate }); g_esri.map.addLayer(featureLayer); featureLayer.on("click", onBoundaryClick); function onBoundaryClick(evt) { var g = evt.graphic; g_esri.map.infoWindow.setContent(g.getContent()); g_esri.map.infoWindow.show(evt.screenPoint, g_esri.map.getInfoWindowAnchor(evt.screenPoint)); formatInfotemplate(false, g); }

I tried to follow some of the below links,

a. https://community.esri.com/t5/arcgis-api-for-javascript/selecting-multiple-features-with-graphics/m-p/562210#M52481

b. https://community.esri.com/t5/arcgis-api-for-javascript/select-multiple-features-by-mouse-clicks/td-p/588560

But couldn't able to get through,

Any help welcome

Regards,

Kishor

Re: JS API 3.x - Select multiple features by mouse click event

NandaKishor — Thu, 15 Apr 2021 11:23:35 GMT

Follow the example below.,

When adding just check if the desire keys are pressed.

<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no"> <title>Labeling features client-side</title> <link rel="stylesheet" href="https://js.arcgis.com/3.35/esri/css/esri.css"> <style> html, body, #map { height: 100%; width: 100%; margin: 0; padding: 0; } </style> <script src="https://js.arcgis.com/3.35/"></script> <script> var map; require([ "esri/map", "esri/geometry/Extent", "esri/layers/FeatureLayer", "esri/layers/GraphicsLayer", "esri/symbols/SimpleLineSymbol", "esri/symbols/SimpleFillSymbol", "esri/renderers/SimpleRenderer", "esri/Color", "dojo/domReady!" ], function(Map, Extent, FeatureLayer, GraphicsLayer, SimpleLineSymbol, SimpleFillSymbol, SimpleRenderer, Color) { const bbox = new Extent({"xmin": -1940058, "ymin": -814715, "xmax": 1683105, "ymax": 1446096, "spatialReference": {"wkid": 102003}}); const map = new Map("map", { extent: bbox }); const statesUrl = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3"; const states = new FeatureLayer(statesUrl, { id: "states", outFields: ["*"] }); map.addLayer(states); const color = new Color("#00ffff"); const line = new SimpleLineSymbol("solid", color, 1.5); const symbol = new SimpleFillSymbol("solid", line, null); const renderer = new SimpleRenderer(symbol); const selected = new GraphicsLayer(); selected.setRenderer(renderer); map.addLayer(selected); let ctrl = false; let shift = false; map.on("key-down", function (evt) { if (evt.key === "Control") { ctrl = true; } else if (evt.key === "Shift") { shift = true; } }); map.on("key-up", function (evt) { if (evt.key === "Control") { ctrl = false; } else if (evt.key === "Shift") { shift = false; } }); states.on("click", function (evt) { if (!ctrl && !shift) { selected.clear(); } selected.add(evt.graphic.clone()); console.log(`Selected: ${selected.graphics.length}`); }); }); </script> </head> <body> <div id="map"></div> </body> </html>

topic JS API 3.x - Select multiple features by mouse click event in ArcGIS JavaScript Maps SDK Questions

JS API 3.x - Select multiple features by mouse click event

Re: JS API 3.x - Select multiple features by mouse click event