Graphic position within map.graphics

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09-17-2014 11:25 AM
TimWitt2
MVP Regular Contributor

Hey everybody,

I was wondering if there is a way to retrieve the position of a particular graphic within the map.graphics layer.

Lets say I use the draw tool and add 3 arrows to my map. The first arrow I created is number 1, the second one is number 2 and the third is number 3. Depending over which of the 3 arrows I hover I would like to know which number it is within the map.graphics layer.

Is this possible?

Thanks,

Tim

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Accepted Solutions
RobertScheitlin__GISP
MVP Esteemed Contributor

Tim,

  There seems to always be one graphic in the map.graphics array but you definitely can count the graphics creation order.

<!DOCTYPE html>

<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <!--The viewport meta tag is used to improve the presentation and behavior of the samples

      on iOS devices-->

    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">

    <title>Shapes and Symbols</title>

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">

    <style>

      #info {

        top: 20px;

        color: #444;

        height: auto;

        font-family: arial;

        right: 20px;

        margin: 5px;

        padding: 10px;

        position: absolute;

        width: 115px;

        z-index: 40;

        border: solid 2px #666;

        border-radius: 4px;

        background-color: #fff;

      }

      html, body, #mapDiv {

        padding:0;

        margin:0;

        height:100%;

      }

      button {

        display: block;

      }

    </style>

    <script src="http://js.arcgis.com/3.10/"></script>

    <script>

      var map, tb;

      require([

        "esri/map", "esri/toolbars/draw",

        "esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleLineSymbol",

        "esri/symbols/SimpleFillSymbol", "esri/symbols/CartographicLineSymbol",

        "esri/graphic",

        "esri/Color", "dojo/dom", "dojo/on", "dojo/domReady!"

      ], function(

        Map, Draw,

        SimpleMarkerSymbol, SimpleLineSymbol,

        SimpleFillSymbol, CartographicLineSymbol,

        Graphic,

        Color, dom, on

      ) {

        map = new Map("mapDiv", {

          basemap: "streets",

          center: [-25.312, 34.307],

          zoom: 3

        });

        map.on("load", initToolbar);

        // markerSymbol is used for point and multipoint, see http://raphaeljs.com/icons/#talkq for more examples

        var markerSymbol = new SimpleMarkerSymbol();

        markerSymbol.setPath("M16,4.938c-7.732,0-14,4.701-14,10.5c0,1.981,0.741,3.833,2.016,5.414L2,25.272l5.613-1.44c2.339,1.316,5.237,2.106,8.387,2.106c7.732,0,14-4.701,14-10.5S23.732,4.938,16,4.938zM16.868,21.375h-1.969v-1.889h1.969V21.375zM16.772,18.094h-1.777l-0.176-8.083h2.113L16.772,18.094z");

        markerSymbol.setColor(new Color("#00FFFF"));

        // lineSymbol used for freehand polyline, polyline and line.

        var lineSymbol = new CartographicLineSymbol(

          CartographicLineSymbol.STYLE_SOLID,

          new Color([255,0,0]), 10,

          CartographicLineSymbol.CAP_ROUND,

          CartographicLineSymbol.JOIN_MITER, 5

        );

        // fill symbol used for extent, polygon and freehand polygon

        var fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,

          new SimpleLineSymbol(

            SimpleLineSymbol.STYLE_SOLID,

              new Color('#000'),

              1

            ),

            new Color('#ff0000')

        );

        function initToolbar() {

          tb = new Draw(map);

          tb.on("draw-end", addGraphic);

          // event delegation so a click handler is not

          // needed for each individual button

          on(dom.byId("info"), "click", function(evt) {

            if ( evt.target.id === "info" ) {

              return;

            }

            var tool = evt.target.id.toLowerCase();

            map.disableMapNavigation();

            tb.activate(tool);

          });

         

          map.graphics.enableMouseEvents();

          map.graphics.on("mouse-over", identifyGraphic);

        }

       

        function identifyGraphic(evt) {

          var cnt = -1;

          dojo.forEach(map.graphics.graphics, function(graphicf) {

              cnt += 1;

              if (graphicf == evt.graphic) {

                  console.log("Hovered Graphic ID is :" + cnt.toString());

                  return;

              }

          });

        }

        function addGraphic(evt) {

          //deactivate the toolbar and clear existing graphics

          tb.deactivate();

          map.enableMapNavigation();

          // figure out which symbol to use

          var symbol;

          if ( evt.geometry.type === "point" || evt.geometry.type === "multipoint") {

            symbol = markerSymbol;

          } else if ( evt.geometry.type === "line" || evt.geometry.type === "polyline") {

            symbol = lineSymbol;

          }

          else {

            symbol = fillSymbol;

          }

          map.graphics.add(new Graphic(evt.geometry, symbol));

        }

      });

    </script>

  </head>

 

  <body>

   

    <div id="info">

      <div>Select a shape then draw on map to add graphic</div>

      <button id="Point">Point</button>

      <button id="Multipoint">Multipoint</button>

      <button id="Line">Line</button>

      <button id="Polyline">Polyline</button>

      <button id="FreehandPolyline">Freehand Polyline</button>

      <button id="Triangle">Triangle</button>

      <button id="Extent">Rectangle</button>

      <button id="Circle">Circle</button>

      <button id="Ellipse">Ellipse</button>

      <button id="Polygon">Polygon</button>

      <button id="FreehandPolygon">Freehand Polygon</button>

    </div>

    <div id="mapDiv"></div>

  </body>

</html>

View solution in original post

7 Replies
PaulCrickard1
Occasional Contributor II

Capture.JPG

var infoTemplate = new InfoTemplate();

var theid=1;

  graphic.setAttributes({"Name":"arrow","id":theid});

map.graphics.on("mouse-over", function(e){

            //get the associated node info when the graphic is clicked

            alert(graphic.getContent());

          });

I used a variable theId so you could increment or whatever.

The alert is annoying, you can load a popup or something (a <div> that floats).

if you click it, you get a popup

Capture2.JPG

TimWitt2
MVP Regular Contributor

Thanks Paul.

So that means I would have to number each new Graphic? I was thinking maybe the graphics layer assigns each graphic that it contains a number.

Tim

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PaulCrickard1
Occasional Contributor II

doesnt look like it. You can check for the keys in the object using

for (var key in graphic){

  alert(key+": "+graphic.key);}

I don't see any obvious key for an ID.

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TimWitt2
MVP Regular Contributor

That's what I thought, but I wasn't sure.

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RobertScheitlin__GISP
MVP Esteemed Contributor

Tim,

  There seems to always be one graphic in the map.graphics array but you definitely can count the graphics creation order.

<!DOCTYPE html>

<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <!--The viewport meta tag is used to improve the presentation and behavior of the samples

      on iOS devices-->

    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">

    <title>Shapes and Symbols</title>

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">

    <style>

      #info {

        top: 20px;

        color: #444;

        height: auto;

        font-family: arial;

        right: 20px;

        margin: 5px;

        padding: 10px;

        position: absolute;

        width: 115px;

        z-index: 40;

        border: solid 2px #666;

        border-radius: 4px;

        background-color: #fff;

      }

      html, body, #mapDiv {

        padding:0;

        margin:0;

        height:100%;

      }

      button {

        display: block;

      }

    </style>

    <script src="http://js.arcgis.com/3.10/"></script>

    <script>

      var map, tb;

      require([

        "esri/map", "esri/toolbars/draw",

        "esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleLineSymbol",

        "esri/symbols/SimpleFillSymbol", "esri/symbols/CartographicLineSymbol",

        "esri/graphic",

        "esri/Color", "dojo/dom", "dojo/on", "dojo/domReady!"

      ], function(

        Map, Draw,

        SimpleMarkerSymbol, SimpleLineSymbol,

        SimpleFillSymbol, CartographicLineSymbol,

        Graphic,

        Color, dom, on

      ) {

        map = new Map("mapDiv", {

          basemap: "streets",

          center: [-25.312, 34.307],

          zoom: 3

        });

        map.on("load", initToolbar);

        // markerSymbol is used for point and multipoint, see http://raphaeljs.com/icons/#talkq for more examples

        var markerSymbol = new SimpleMarkerSymbol();

        markerSymbol.setPath("M16,4.938c-7.732,0-14,4.701-14,10.5c0,1.981,0.741,3.833,2.016,5.414L2,25.272l5.613-1.44c2.339,1.316,5.237,2.106,8.387,2.106c7.732,0,14-4.701,14-10.5S23.732,4.938,16,4.938zM16.868,21.375h-1.969v-1.889h1.969V21.375zM16.772,18.094h-1.777l-0.176-8.083h2.113L16.772,18.094z");

        markerSymbol.setColor(new Color("#00FFFF"));

        // lineSymbol used for freehand polyline, polyline and line.

        var lineSymbol = new CartographicLineSymbol(

          CartographicLineSymbol.STYLE_SOLID,

          new Color([255,0,0]), 10,

          CartographicLineSymbol.CAP_ROUND,

          CartographicLineSymbol.JOIN_MITER, 5

        );

        // fill symbol used for extent, polygon and freehand polygon

        var fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,

          new SimpleLineSymbol(

            SimpleLineSymbol.STYLE_SOLID,

              new Color('#000'),

              1

            ),

            new Color('#ff0000')

        );

        function initToolbar() {

          tb = new Draw(map);

          tb.on("draw-end", addGraphic);

          // event delegation so a click handler is not

          // needed for each individual button

          on(dom.byId("info"), "click", function(evt) {

            if ( evt.target.id === "info" ) {

              return;

            }

            var tool = evt.target.id.toLowerCase();

            map.disableMapNavigation();

            tb.activate(tool);

          });

         

          map.graphics.enableMouseEvents();

          map.graphics.on("mouse-over", identifyGraphic);

        }

       

        function identifyGraphic(evt) {

          var cnt = -1;

          dojo.forEach(map.graphics.graphics, function(graphicf) {

              cnt += 1;

              if (graphicf == evt.graphic) {

                  console.log("Hovered Graphic ID is :" + cnt.toString());

                  return;

              }

          });

        }

        function addGraphic(evt) {

          //deactivate the toolbar and clear existing graphics

          tb.deactivate();

          map.enableMapNavigation();

          // figure out which symbol to use

          var symbol;

          if ( evt.geometry.type === "point" || evt.geometry.type === "multipoint") {

            symbol = markerSymbol;

          } else if ( evt.geometry.type === "line" || evt.geometry.type === "polyline") {

            symbol = lineSymbol;

          }

          else {

            symbol = fillSymbol;

          }

          map.graphics.add(new Graphic(evt.geometry, symbol));

        }

      });

    </script>

  </head>

 

  <body>

   

    <div id="info">

      <div>Select a shape then draw on map to add graphic</div>

      <button id="Point">Point</button>

      <button id="Multipoint">Multipoint</button>

      <button id="Line">Line</button>

      <button id="Polyline">Polyline</button>

      <button id="FreehandPolyline">Freehand Polyline</button>

      <button id="Triangle">Triangle</button>

      <button id="Extent">Rectangle</button>

      <button id="Circle">Circle</button>

      <button id="Ellipse">Ellipse</button>

      <button id="Polygon">Polygon</button>

      <button id="FreehandPolygon">Freehand Polygon</button>

    </div>

    <div id="mapDiv"></div>

  </body>

</html>

View solution in original post

TimWitt2
MVP Regular Contributor

Thanks Robert,

that is what I was looking for!

Tim

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PaulCrickard1
Occasional Contributor II

And for the geometry

graphic.setAttributes({"Name":"arrow","id":theid,"x":graphic.geometry.x,"y":graphic.geometry.y});

Capture.JPG

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