Detecting selection event on Query or Attribute Table widgets

ahuarte

Hi, I'm trying to find a way to detect the event of feature selection of a ArcGISMapServiceLayer loaded in a map. Or get the features selected by user using the Query or Attribute Table widgets.

I don't know how to get the FeatureLayer collection of the ArcGISMapServiceLayer instance to attach their 'selection-change'/'selection-clear' events. I see the 'layersInfo' member successfully but the method 'map.getLayer(id)' always return null to these sublayer collection.

Is it possible? How I do it?

Thanks in advance

Alvaro

ahuarte

Hi Robert, thanks for your review.

Finally I implemented the third option overriding the original methods where the widgets manage the query results. And It works fine!

My code for Query widget....

var widgetConfigs = null;

if ((widgetConfigs = widget.appConfig.getConfigElementsByName("Query")) != null && widgetConfigs.length > 0) {
  var connectFunction = null;
  var queryWidget = widget.widgetManager.getWidgetById(widgetConfigs[0].id);

  // ... override methods.
  connectFunction = function (currentWidget) {
    var theWidget = currentWidget;
    var theOriginalResultItemsFunction = theWidget._addResultItems;
    var theOriginalClearResultPageFunction = theWidget._clearResultPage;

    if (!theOriginalResultItemsFunction || !theOriginalClearResultPageFunction)
       return;

    theWidget._addResultItems = function (features, resultLayer, relatedResults, relatedTableIds) {
       var self = this;
       theOriginalResultItemsFunction.call(self, features, resultLayer, relatedResults, relatedTableIds);

       ... my bla bla
    };
    theWidget._clearResultPage = function () {
       var self = this;
       theOriginalClearResultPageFunction.call(self);

       ... my bla bla
    };
  };
  if (!queryWidget) {
    widget.widgetManager.loadWidget(widgetConfigs[0]).then(lang.hitch(widget, function (currentWidget) { connectFunction(currentWidget); }));
  }
  else {
    connectFunction(queryWidget);
  }
 }

🙂 Thanks Robert!

Alvaro