How do i remove an event listener from Identify Task

SteffiAntony

Seems like this should be simple, but I'm stumped. i need the functionality to be done in such a a way that on button click the identify task should be run properly on every click function on map . and on the same time when i press the same button again it should stop the API calls, and the event should be removed and vice-versa. how do it can be possible?

var identifyButton = dom.byId("identify")

on(identifyButton, "click", function (evt) {

    map.on("click", executeIdentifyTask);

    //create identify tasks and setup parameters

    identifyTask = new IdentifyTask(textbox.value);

    identifyParams = new IdentifyParameters();

    identifyParams.tolerance = 3;

    identifyParams.returnGeometry = true;

    identifyParams.layerIds = [0, 2];

    identifyParams.layerOption = IdentifyParameters.LAYER_OPTION_ALL;

    identifyParams.width = map.width;

    identifyParams.height = map.height;

  })

  function executeIdentifyTask(event) {

    identifyParams.geometry = event.mapPoint;

    identifyParams.mapExtent = map.extent;

    var deferred = identifyTask

      .execute(identifyParams)

      .addCallback(function (response) {

        // response is an array of identify result objects

        // Let's return an array of features.

        return arrayUtils.map(response, function (result) {

          var feature = result.feature;

          var layerName = result.layerName;

          feature.attributes.layerName = layerName;

              var Templates = new InfoTemplate("");

              feature.setInfoTemplate(Templates);

              return feature;

        });

      });

    // InfoWindow expects an array of features from each deferred

    // object that you pass. If the response from the task execution

    // above is not an array of features, then you need to add a callback

    // like the one above to post-process the response and return an

    // array of features.

    map.infoWindow.setFeatures([deferred]);

    map.infoWindow.show(event.mapPoint);

  }

ManishPatel

Hi Steffi Antony,

You can use the connect and disconnect to disable the events. And if I understand your requirement correctly, I have put together a sample for you. Have a look at it at Identify with Popup 

The source code you can find at https://codepen.io/mrpatel/pen/OJNwMeE 

Hope this helps.

Cheers!

Manish