topic GraphicsLayer Symbol by GeometryType in ArcGIS API for Flex Questions

GraphicsLayer Symbol by GeometryType

JoseSousa — Thu, 11 Mar 2010 15:35:10 GMT

Dear ArcGIS API Flex Team,

I've noticed that GraphicsLayer.SymbolFunction has been deprecated. Now I believe that I must use Renderer instead.

Is there a way of specifying the symbols for the GraphicsLayer for each type of geometry (Point, Polyline and Polygon)?

I've searched in the samples but I was unable to find it.

Thanks advanced,

José Sousa

GraphicsLayer Symbol by GeometryType

DasaPaddock — Sat, 11 Dec 2021 21:59:22 GMT

The logic that was in the symbolFunction, can now be placed in a custom renderer's getSymbol function. For example:

package test
{

import com.esri.ags.Graphic;
import com.esri.ags.geometry.MapPoint;
import com.esri.ags.geometry.Polygon;
import com.esri.ags.geometry.Polyline;
import com.esri.ags.renderers.Renderer;
import com.esri.ags.symbols.Symbol;

public class MyRenderer extends Renderer
{
    public var pointSymbol:Symbol;
    public var polylineSymbol:Symbol;
    public var polygonSymbol:Symbol;
    
    override public function getSymbol(graphic:Graphic):Symbol
    {
        if (graphic.geometry is MapPoint)
        {
            return pointSymbol;
        }
        if (graphic.geometry is Polyline)
        {
            return polylineSymbol;
        }
        if (graphic.geometry is Polygon)
        {
            return polygonSymbol;
        }
        return null;
    }
}

}

GraphicsLayer Symbol by GeometryType

JoseSousa — Thu, 11 Mar 2010 16:30:03 GMT

That will probably work 🙂
Thanks a lot.

José Sousa

Re: Beta 10: GraphicsLayer Symbol by GeometryType

JanicePeal — Tue, 26 Jul 2011 12:04:25 GMT

I need to accomplish the same task. I created the renderer class in an external flex library project(MyRenderer), but how do I implement the renderer in the GraphicsLayer (mxml)?

When I tried to point the renderer to the class:

<esri:GraphicsLayer id="debugGL2" symbol="{sfs}" renderer="{test.MyRenderer}"/>

I get 1067: Implicit coercion of a value of type Class to an unrelated type com.esri.ags.renderers:Renderer.

I am fairly new at this, so apologies in advance for my naivete. Many thanks in advance for your assistance.

Re: Beta 10: GraphicsLayer Symbol by GeometryType

RobertScheitlin__GISP — Tue, 26 Jul 2011 12:11:58 GMT

Janice,

What does your MyRenderer code look like?

Re: Beta 10: GraphicsLayer Symbol by GeometryType

DasaPaddock — Tue, 02 Aug 2011 15:51:37 GMT

You need to pass an instance. e.g.

<esri:GraphicsLayer id="debugGL2" symbol="{sfs}" renderer="{new MyRenderer()}"/>