topic Re: Flex viewer set line colour for selected feature in ArcGIS Viewer for Flex Questions

Flex viewer set line colour for selected feature

KoseWong — Sat, 11 Dec 2021 15:03:28 GMT

Greetings,

I use querytask to select polyline feature, but the selected feature colour just the same of all other features in the same layer. I tried to set the colour use:

<esri:SimpleLineSymbol id="lineSymbol"
  alpha="0.4"
  color="0x0000FF"
  width="2">

But it is no effect.

I add code in querytask onResult function using

graphicsLayer.symbol = sfs;

Also no effect.

Is there an example for set colour for polyline selected feature(s), the sample I found both for polygon features.

Thanks.

Re: Flex viewer set line colour for selected feature

RobertScheitlin__GISP — Thu, 08 Jan 2015 03:57:10 GMT

Kose,

Without seeing your code, all I can do is guess based on your minimal code shared. One thing that sticks out is

graphicsLayer.symbol = sfs;

Normally people use sfs for a Simple Fill Symbol and not a SImpleLineSymbol. Also the graphicsLayer symbol will be ignored if the actual graphic gets a symbol assigned in the code.

Re: Flex viewer set line colour for selected feature

KoseWong — Fri, 09 Jan 2015 01:22:51 GMT

Hello Robert,

Thanks for your explanation, sorry to provide piece of code.

The related code as follows:

queryTask.execute(query, new AsyncResponder(onQueryResult, onQueryFault));

function onQueryResult(resultSet:FeatureSet, token:Object = null):void

{

graphicsLayer.clear();

if (resultSet.features.length == 0)

{

Alert.show("No feature returned, please try again.");

}

else

{

var finalExtent:Extent;

var stGraphic:Graphic = resultSet.features[0];

finalExtent = Polyline(stGraphic.geometry).extent;

stGraphic = new Graphic();

for each (var graphic:Graphic in resultSet.features)

{

stGraphic.geometry = graphic.geometry;

//resultLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, 0x0000FF, 0.4, 2); // this line no use, right?

graphicsLayer.add(graphic);

finalExtent = finalExtent.union(Polyline(graphic.geometry).extent);

graphicsLayer.symbol = sfs;

}

map.extent = finalExtent;

}

function onQueryFault(faultInfo:Object, token:Object = null):void

{

Alert.show(faultInfo.toString());

}

There is no other code to set the symbol. Is there something wrong with my code?

Thank you so much.

Re: Flex viewer set line colour for selected feature

RobertScheitlin__GISP — Sat, 11 Dec 2021 15:03:31 GMT

Kose,

Here is the code fixed:

queryTask.execute(query, new AsyncResponder(onQueryResult, onQueryFault)); 

function onQueryResult(resultSet:FeatureSet, token:Object = null):void  
  {  
      graphicsLayer.clear();  
      if (resultSet.features.length == 0){  
          Alert.show("No feature returned, please try again.");  
      }else{  
          var finalExtent:Extent;  
          var stGraphic:Graphic = resultSet.features[0];  
          finalExtent = Polyline(stGraphic.geometry).extent;  
          resultLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, 0x0000FF, 0.4, 2);
          graphicsLayer.symbol = resultLineSymbol;
          for each (var graphic:Graphic in resultSet.features){
              stGraphic = new Graphic(graphic.geometry);
              graphicsLayer.add(graphic);  
              finalExtent = finalExtent.union(Polyline(graphic.geometry).extent);
          }   
          map.extent = finalExtent;
      }
  }

function onQueryFault(faultInfo:Object, token:Object = null):void  
  {  
      Alert.show(faultInfo.toString());  
  }

Re: Flex viewer set line colour for selected feature

KoseWong — Fri, 09 Jan 2015 02:26:39 GMT

Hi Robert,

It works! Thank you very very much!!