topic Re: add a button click event in _showResult() in ArcGIS Web AppBuilder Questions

add a button click event in _showResult()

Alexwang — Mon, 23 May 2016 17:50:33 GMT

HI, very confused about this dojo API and widget stuff. I want to add a button click event in the QueryTask _showResults() function so zooming to a feature is triggered ONLY when a button gets clicked. The following codes automatically trigger the button click event after the query finishes which is not what i want. Please help!

_query: function(){

var query = new Query();

query.where = "1=1";

query.outFields = ["ID", "Name"];

query.returnGeometry = true;

var queryTask = new QueryTask("http://......");

queryTask.execute(query, lang.hitch(this, this._showResults));

_showResults: function(featureSet){

this.own(on(this.btnZoomTo, "click", lang.hitch(this, this.map.centerAndZoom(featureSet.features[0].geometry, 10))));

Re: add a button click event in _showResult()

RobertScheitlin__GISP — Sat, 11 Dec 2021 16:13:19 GMT

Alex,

The issue is that you are not assigning a function to the click, you were just assigning code:

_showResults: function(featureSet){
    this.own(on(this.btnZoomTo, "click", lang.hitch(this, function{
        this.map.centerAndZoom(featureSet.features[0].geometry, 10)
    })));
},

Re: add a button click event in _showResult()

Alexwang — Tue, 24 May 2016 13:18:32 GMT

Thanks Robert. so if understood it correctly, my way will fire this.map.centerAndZoom() automatically without clicking while your version assigns a function to the click event and fire only when user clicks the button, correct? Thanks so much for your help!

Re: add a button click event in _showResult()

RobertScheitlin__GISP — Tue, 24 May 2016 13:27:28 GMT

Alex,

That is correct.

Re: add a button click event in _showResult()

Alexwang — Tue, 24 May 2016 13:34:06 GMT

this is my first WAB and widget project. lots of stuff to learn. thanks so much for your help. you made my life easier! t